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", "DUPFD_QUERY", [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 = "faccessat", 951 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, 952 [1] = { .scnprintf = SCA_FILENAME, /* pathname */ }, 953 [2] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, }, 954 { .name = "faccessat2", 955 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, 956 [1] = { .scnprintf = SCA_FILENAME, /* pathname */ }, 957 [2] = { .scnprintf = SCA_ACCMODE, /* mode */ }, 958 [3] = { .scnprintf = SCA_FACCESSAT2_FLAGS, /* flags */ }, }, }, 959 { .name = "fchmodat", 960 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 961 { .name = "fchownat", 962 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 963 { .name = "fcntl", 964 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */ 965 .strtoul = STUL_STRARRAYS, 966 .parm = &strarrays__fcntl_cmds_arrays, 967 .show_zero = true, }, 968 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, }, 969 { .name = "flock", 970 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, }, 971 { .name = "fsconfig", 972 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, }, 973 { .name = "fsmount", 974 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags), 975 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, }, 976 { .name = "fspick", 977 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 978 [1] = { .scnprintf = SCA_FILENAME, /* path */ }, 979 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, }, 980 { .name = "fstat", .alias = "newfstat", }, 981 { .name = "futex", 982 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ }, 983 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, }, 984 { .name = "futimesat", 985 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 986 { .name = "getitimer", 987 .arg = { [0] = STRARRAY(which, itimers), }, }, 988 { .name = "getpid", .errpid = true, }, 989 { .name = "getpgid", .errpid = true, }, 990 { .name = "getppid", .errpid = true, }, 991 { .name = "getrandom", 992 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, }, 993 { .name = "getrlimit", 994 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 995 { .name = "getsockopt", 996 .arg = { [1] = STRARRAY(level, socket_level), }, }, 997 { .name = "gettid", .errpid = true, }, 998 { .name = "ioctl", 999 .arg = { 1000 #if defined(__i386__) || defined(__x86_64__) 1001 /* 1002 * FIXME: Make this available to all arches. 1003 */ 1004 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ }, 1005 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 1006 #else 1007 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 1008 #endif 1009 { .name = "kcmp", .nr_args = 5, 1010 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, }, 1011 [1] = { .name = "pid2", .scnprintf = SCA_PID, }, 1012 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, }, 1013 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, }, 1014 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, }, 1015 { .name = "keyctl", 1016 .arg = { [0] = STRARRAY(option, keyctl_options), }, }, 1017 { .name = "kill", 1018 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1019 { .name = "linkat", 1020 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 1021 { .name = "lseek", 1022 .arg = { [2] = STRARRAY(whence, whences), }, }, 1023 { .name = "lstat", .alias = "newlstat", }, 1024 { .name = "madvise", 1025 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 1026 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, }, 1027 { .name = "mkdirat", 1028 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 1029 { .name = "mknodat", 1030 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 1031 { .name = "mmap", .hexret = true, 1032 /* The standard mmap maps to old_mmap on s390x */ 1033 #if defined(__s390x__) 1034 .alias = "old_mmap", 1035 #endif 1036 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, .show_zero = true, /* prot */ }, 1037 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ 1038 .strtoul = STUL_STRARRAY_FLAGS, 1039 .parm = &strarray__mmap_flags, }, 1040 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, }, 1041 { .name = "mount", 1042 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ }, 1043 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ 1044 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, }, 1045 { .name = "move_mount", 1046 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ }, 1047 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ }, 1048 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ }, 1049 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ }, 1050 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, }, 1051 { .name = "mprotect", 1052 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 1053 [2] = { .scnprintf = SCA_MMAP_PROT, .show_zero = true, /* prot */ }, }, }, 1054 { .name = "mq_unlink", 1055 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, }, 1056 { .name = "mremap", .hexret = true, 1057 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, }, 1058 { .name = "name_to_handle_at", 1059 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1060 { .name = "nanosleep", 1061 .arg = { [0] = { .scnprintf = SCA_TIMESPEC, /* req */ }, }, }, 1062 { .name = "newfstatat", .alias = "fstatat", 1063 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, 1064 [1] = { .scnprintf = SCA_FILENAME, /* pathname */ }, 1065 [3] = { .scnprintf = SCA_FS_AT_FLAGS, /* flags */ }, }, }, 1066 { .name = "open", 1067 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 1068 { .name = "open_by_handle_at", 1069 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 1070 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 1071 { .name = "openat", 1072 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 1073 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 1074 { .name = "perf_event_open", 1075 .arg = { [0] = { .scnprintf = SCA_PERF_ATTR, /* attr */ }, 1076 [2] = { .scnprintf = SCA_INT, /* cpu */ }, 1077 [3] = { .scnprintf = SCA_FD, /* group_fd */ }, 1078 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, }, 1079 { .name = "pipe2", 1080 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, }, 1081 { .name = "pkey_alloc", 1082 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, }, 1083 { .name = "pkey_free", 1084 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, }, 1085 { .name = "pkey_mprotect", 1086 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 1087 [2] = { .scnprintf = SCA_MMAP_PROT, .show_zero = true, /* prot */ }, 1088 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, }, 1089 { .name = "poll", .timeout = true, }, 1090 { .name = "ppoll", .timeout = true, }, 1091 { .name = "prctl", 1092 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ 1093 .strtoul = STUL_STRARRAY, 1094 .parm = &strarray__prctl_options, }, 1095 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ }, 1096 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, }, 1097 { .name = "pread", .alias = "pread64", }, 1098 { .name = "preadv", .alias = "pread", }, 1099 { .name = "prlimit64", 1100 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, }, 1101 { .name = "pwrite", .alias = "pwrite64", }, 1102 { .name = "readlinkat", 1103 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1104 { .name = "recvfrom", 1105 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1106 { .name = "recvmmsg", 1107 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1108 { .name = "recvmsg", 1109 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1110 { .name = "renameat", 1111 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 1112 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, }, 1113 { .name = "renameat2", 1114 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 1115 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, 1116 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, }, 1117 { .name = "rt_sigaction", 1118 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1119 { .name = "rt_sigprocmask", 1120 .arg = { [0] = STRARRAY(how, sighow), }, }, 1121 { .name = "rt_sigqueueinfo", 1122 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1123 { .name = "rt_tgsigqueueinfo", 1124 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1125 { .name = "sched_setscheduler", 1126 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, }, 1127 { .name = "seccomp", 1128 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ }, 1129 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, }, 1130 { .name = "select", .timeout = true, }, 1131 { .name = "sendfile", .alias = "sendfile64", }, 1132 { .name = "sendmmsg", 1133 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1134 { .name = "sendmsg", 1135 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1136 { .name = "sendto", 1137 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, 1138 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, }, 1139 { .name = "set_tid_address", .errpid = true, }, 1140 { .name = "setitimer", 1141 .arg = { [0] = STRARRAY(which, itimers), }, }, 1142 { .name = "setrlimit", 1143 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 1144 { .name = "setsockopt", 1145 .arg = { [1] = STRARRAY(level, socket_level), }, }, 1146 { .name = "socket", 1147 .arg = { [0] = STRARRAY(family, socket_families), 1148 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 1149 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 1150 { .name = "socketpair", 1151 .arg = { [0] = STRARRAY(family, socket_families), 1152 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 1153 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 1154 { .name = "stat", .alias = "newstat", }, 1155 { .name = "statx", 1156 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ }, 1157 [2] = { .scnprintf = SCA_FS_AT_FLAGS, /* flags */ } , 1158 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, }, 1159 { .name = "swapoff", 1160 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 1161 { .name = "swapon", 1162 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 1163 { .name = "symlinkat", 1164 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1165 { .name = "sync_file_range", 1166 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, }, 1167 { .name = "tgkill", 1168 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1169 { .name = "tkill", 1170 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1171 { .name = "umount2", .alias = "umount", 1172 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, }, 1173 { .name = "uname", .alias = "newuname", }, 1174 { .name = "unlinkat", 1175 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 1176 [1] = { .scnprintf = SCA_FILENAME, /* pathname */ }, 1177 [2] = { .scnprintf = SCA_FS_AT_FLAGS, /* flags */ }, }, }, 1178 { .name = "utimensat", 1179 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, }, 1180 { .name = "wait4", .errpid = true, 1181 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 1182 { .name = "waitid", .errpid = true, 1183 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 1184 }; 1185 1186 static int syscall_fmt__cmp(const void *name, const void *fmtp) 1187 { 1188 const struct syscall_fmt *fmt = fmtp; 1189 return strcmp(name, fmt->name); 1190 } 1191 1192 static const struct syscall_fmt *__syscall_fmt__find(const struct syscall_fmt *fmts, 1193 const int nmemb, 1194 const char *name) 1195 { 1196 return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp); 1197 } 1198 1199 static const struct syscall_fmt *syscall_fmt__find(const char *name) 1200 { 1201 const int nmemb = ARRAY_SIZE(syscall_fmts); 1202 return __syscall_fmt__find(syscall_fmts, nmemb, name); 1203 } 1204 1205 static const struct syscall_fmt *__syscall_fmt__find_by_alias(const struct syscall_fmt *fmts, 1206 const int nmemb, const char *alias) 1207 { 1208 int i; 1209 1210 for (i = 0; i < nmemb; ++i) { 1211 if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0) 1212 return &fmts[i]; 1213 } 1214 1215 return NULL; 1216 } 1217 1218 static const struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias) 1219 { 1220 const int nmemb = ARRAY_SIZE(syscall_fmts); 1221 return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias); 1222 } 1223 1224 /* 1225 * is_exit: is this "exit" or "exit_group"? 1226 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter. 1227 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc. 1228 * nonexistent: Just a hole in the syscall table, syscall id not allocated 1229 */ 1230 struct syscall { 1231 struct tep_event *tp_format; 1232 int nr_args; 1233 int args_size; 1234 struct { 1235 struct bpf_program *sys_enter, 1236 *sys_exit; 1237 } bpf_prog; 1238 bool is_exit; 1239 bool is_open; 1240 bool nonexistent; 1241 struct tep_format_field *args; 1242 const char *name; 1243 const struct syscall_fmt *fmt; 1244 struct syscall_arg_fmt *arg_fmt; 1245 }; 1246 1247 /* 1248 * We need to have this 'calculated' boolean because in some cases we really 1249 * don't know what is the duration of a syscall, for instance, when we start 1250 * a session and some threads are waiting for a syscall to finish, say 'poll', 1251 * in which case all we can do is to print "( ? ) for duration and for the 1252 * start timestamp. 1253 */ 1254 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp) 1255 { 1256 double duration = (double)t / NSEC_PER_MSEC; 1257 size_t printed = fprintf(fp, "("); 1258 1259 if (!calculated) 1260 printed += fprintf(fp, " "); 1261 else if (duration >= 1.0) 1262 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration); 1263 else if (duration >= 0.01) 1264 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration); 1265 else 1266 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration); 1267 return printed + fprintf(fp, "): "); 1268 } 1269 1270 /** 1271 * filename.ptr: The filename char pointer that will be vfs_getname'd 1272 * filename.entry_str_pos: Where to insert the string translated from 1273 * filename.ptr by the vfs_getname tracepoint/kprobe. 1274 * ret_scnprintf: syscall args may set this to a different syscall return 1275 * formatter, for instance, fcntl may return fds, file flags, etc. 1276 */ 1277 struct thread_trace { 1278 u64 entry_time; 1279 bool entry_pending; 1280 unsigned long nr_events; 1281 unsigned long pfmaj, pfmin; 1282 char *entry_str; 1283 double runtime_ms; 1284 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 1285 struct { 1286 unsigned long ptr; 1287 short int entry_str_pos; 1288 bool pending_open; 1289 unsigned int namelen; 1290 char *name; 1291 } filename; 1292 struct { 1293 int max; 1294 struct file *table; 1295 } files; 1296 1297 struct intlist *syscall_stats; 1298 }; 1299 1300 static struct thread_trace *thread_trace__new(void) 1301 { 1302 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace)); 1303 1304 if (ttrace) { 1305 ttrace->files.max = -1; 1306 ttrace->syscall_stats = intlist__new(NULL); 1307 } 1308 1309 return ttrace; 1310 } 1311 1312 static void thread_trace__free_files(struct thread_trace *ttrace); 1313 1314 static void thread_trace__delete(void *pttrace) 1315 { 1316 struct thread_trace *ttrace = pttrace; 1317 1318 if (!ttrace) 1319 return; 1320 1321 intlist__delete(ttrace->syscall_stats); 1322 ttrace->syscall_stats = NULL; 1323 thread_trace__free_files(ttrace); 1324 zfree(&ttrace->entry_str); 1325 free(ttrace); 1326 } 1327 1328 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp) 1329 { 1330 struct thread_trace *ttrace; 1331 1332 if (thread == NULL) 1333 goto fail; 1334 1335 if (thread__priv(thread) == NULL) 1336 thread__set_priv(thread, thread_trace__new()); 1337 1338 if (thread__priv(thread) == NULL) 1339 goto fail; 1340 1341 ttrace = thread__priv(thread); 1342 ++ttrace->nr_events; 1343 1344 return ttrace; 1345 fail: 1346 color_fprintf(fp, PERF_COLOR_RED, 1347 "WARNING: not enough memory, dropping samples!\n"); 1348 return NULL; 1349 } 1350 1351 1352 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg, 1353 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg)) 1354 { 1355 struct thread_trace *ttrace = thread__priv(arg->thread); 1356 1357 ttrace->ret_scnprintf = ret_scnprintf; 1358 } 1359 1360 #define TRACE_PFMAJ (1 << 0) 1361 #define TRACE_PFMIN (1 << 1) 1362 1363 static const size_t trace__entry_str_size = 2048; 1364 1365 static void thread_trace__free_files(struct thread_trace *ttrace) 1366 { 1367 for (int i = 0; i < ttrace->files.max; ++i) { 1368 struct file *file = ttrace->files.table + i; 1369 zfree(&file->pathname); 1370 } 1371 1372 zfree(&ttrace->files.table); 1373 ttrace->files.max = -1; 1374 } 1375 1376 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd) 1377 { 1378 if (fd < 0) 1379 return NULL; 1380 1381 if (fd > ttrace->files.max) { 1382 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file)); 1383 1384 if (nfiles == NULL) 1385 return NULL; 1386 1387 if (ttrace->files.max != -1) { 1388 memset(nfiles + ttrace->files.max + 1, 0, 1389 (fd - ttrace->files.max) * sizeof(struct file)); 1390 } else { 1391 memset(nfiles, 0, (fd + 1) * sizeof(struct file)); 1392 } 1393 1394 ttrace->files.table = nfiles; 1395 ttrace->files.max = fd; 1396 } 1397 1398 return ttrace->files.table + fd; 1399 } 1400 1401 struct file *thread__files_entry(struct thread *thread, int fd) 1402 { 1403 return thread_trace__files_entry(thread__priv(thread), fd); 1404 } 1405 1406 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname) 1407 { 1408 struct thread_trace *ttrace = thread__priv(thread); 1409 struct file *file = thread_trace__files_entry(ttrace, fd); 1410 1411 if (file != NULL) { 1412 struct stat st; 1413 if (stat(pathname, &st) == 0) 1414 file->dev_maj = major(st.st_rdev); 1415 file->pathname = strdup(pathname); 1416 if (file->pathname) 1417 return 0; 1418 } 1419 1420 return -1; 1421 } 1422 1423 static int thread__read_fd_path(struct thread *thread, int fd) 1424 { 1425 char linkname[PATH_MAX], pathname[PATH_MAX]; 1426 struct stat st; 1427 int ret; 1428 1429 if (thread__pid(thread) == thread__tid(thread)) { 1430 scnprintf(linkname, sizeof(linkname), 1431 "/proc/%d/fd/%d", thread__pid(thread), fd); 1432 } else { 1433 scnprintf(linkname, sizeof(linkname), 1434 "/proc/%d/task/%d/fd/%d", 1435 thread__pid(thread), thread__tid(thread), fd); 1436 } 1437 1438 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname)) 1439 return -1; 1440 1441 ret = readlink(linkname, pathname, sizeof(pathname)); 1442 1443 if (ret < 0 || ret > st.st_size) 1444 return -1; 1445 1446 pathname[ret] = '\0'; 1447 return trace__set_fd_pathname(thread, fd, pathname); 1448 } 1449 1450 static const char *thread__fd_path(struct thread *thread, int fd, 1451 struct trace *trace) 1452 { 1453 struct thread_trace *ttrace = thread__priv(thread); 1454 1455 if (ttrace == NULL || trace->fd_path_disabled) 1456 return NULL; 1457 1458 if (fd < 0) 1459 return NULL; 1460 1461 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) { 1462 if (!trace->live) 1463 return NULL; 1464 ++trace->stats.proc_getname; 1465 if (thread__read_fd_path(thread, fd)) 1466 return NULL; 1467 } 1468 1469 return ttrace->files.table[fd].pathname; 1470 } 1471 1472 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg) 1473 { 1474 int fd = arg->val; 1475 size_t printed = scnprintf(bf, size, "%d", fd); 1476 const char *path = thread__fd_path(arg->thread, fd, arg->trace); 1477 1478 if (path) 1479 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1480 1481 return printed; 1482 } 1483 1484 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size) 1485 { 1486 size_t printed = scnprintf(bf, size, "%d", fd); 1487 struct thread *thread = machine__find_thread(trace->host, pid, pid); 1488 1489 if (thread) { 1490 const char *path = thread__fd_path(thread, fd, trace); 1491 1492 if (path) 1493 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1494 1495 thread__put(thread); 1496 } 1497 1498 return printed; 1499 } 1500 1501 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 1502 struct syscall_arg *arg) 1503 { 1504 int fd = arg->val; 1505 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg); 1506 struct thread_trace *ttrace = thread__priv(arg->thread); 1507 1508 if (ttrace && fd >= 0 && fd <= ttrace->files.max) 1509 zfree(&ttrace->files.table[fd].pathname); 1510 1511 return printed; 1512 } 1513 1514 static void thread__set_filename_pos(struct thread *thread, const char *bf, 1515 unsigned long ptr) 1516 { 1517 struct thread_trace *ttrace = thread__priv(thread); 1518 1519 ttrace->filename.ptr = ptr; 1520 ttrace->filename.entry_str_pos = bf - ttrace->entry_str; 1521 } 1522 1523 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size) 1524 { 1525 struct augmented_arg *augmented_arg = arg->augmented.args; 1526 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value); 1527 /* 1528 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls 1529 * we would have two strings, each prefixed by its size. 1530 */ 1531 int consumed = sizeof(*augmented_arg) + augmented_arg->size; 1532 1533 arg->augmented.args = ((void *)arg->augmented.args) + consumed; 1534 arg->augmented.size -= consumed; 1535 1536 return printed; 1537 } 1538 1539 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 1540 struct syscall_arg *arg) 1541 { 1542 unsigned long ptr = arg->val; 1543 1544 if (arg->augmented.args) 1545 return syscall_arg__scnprintf_augmented_string(arg, bf, size); 1546 1547 if (!arg->trace->vfs_getname) 1548 return scnprintf(bf, size, "%#x", ptr); 1549 1550 thread__set_filename_pos(arg->thread, bf, ptr); 1551 return 0; 1552 } 1553 1554 static bool trace__filter_duration(struct trace *trace, double t) 1555 { 1556 return t < (trace->duration_filter * NSEC_PER_MSEC); 1557 } 1558 1559 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1560 { 1561 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC; 1562 1563 return fprintf(fp, "%10.3f ", ts); 1564 } 1565 1566 /* 1567 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are 1568 * using ttrace->entry_time for a thread that receives a sys_exit without 1569 * first having received a sys_enter ("poll" issued before tracing session 1570 * starts, lost sys_enter exit due to ring buffer overflow). 1571 */ 1572 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1573 { 1574 if (tstamp > 0) 1575 return __trace__fprintf_tstamp(trace, tstamp, fp); 1576 1577 return fprintf(fp, " ? "); 1578 } 1579 1580 static pid_t workload_pid = -1; 1581 static volatile sig_atomic_t done = false; 1582 static volatile sig_atomic_t interrupted = false; 1583 1584 static void sighandler_interrupt(int sig __maybe_unused) 1585 { 1586 done = interrupted = true; 1587 } 1588 1589 static void sighandler_chld(int sig __maybe_unused, siginfo_t *info, 1590 void *context __maybe_unused) 1591 { 1592 if (info->si_pid == workload_pid) 1593 done = true; 1594 } 1595 1596 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp) 1597 { 1598 size_t printed = 0; 1599 1600 if (trace->multiple_threads) { 1601 if (trace->show_comm) 1602 printed += fprintf(fp, "%.14s/", thread__comm_str(thread)); 1603 printed += fprintf(fp, "%d ", thread__tid(thread)); 1604 } 1605 1606 return printed; 1607 } 1608 1609 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread, 1610 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp) 1611 { 1612 size_t printed = 0; 1613 1614 if (trace->show_tstamp) 1615 printed = trace__fprintf_tstamp(trace, tstamp, fp); 1616 if (trace->show_duration) 1617 printed += fprintf_duration(duration, duration_calculated, fp); 1618 return printed + trace__fprintf_comm_tid(trace, thread, fp); 1619 } 1620 1621 static int trace__process_event(struct trace *trace, struct machine *machine, 1622 union perf_event *event, struct perf_sample *sample) 1623 { 1624 int ret = 0; 1625 1626 switch (event->header.type) { 1627 case PERF_RECORD_LOST: 1628 color_fprintf(trace->output, PERF_COLOR_RED, 1629 "LOST %" PRIu64 " events!\n", event->lost.lost); 1630 ret = machine__process_lost_event(machine, event, sample); 1631 break; 1632 default: 1633 ret = machine__process_event(machine, event, sample); 1634 break; 1635 } 1636 1637 return ret; 1638 } 1639 1640 static int trace__tool_process(struct perf_tool *tool, 1641 union perf_event *event, 1642 struct perf_sample *sample, 1643 struct machine *machine) 1644 { 1645 struct trace *trace = container_of(tool, struct trace, tool); 1646 return trace__process_event(trace, machine, event, sample); 1647 } 1648 1649 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) 1650 { 1651 struct machine *machine = vmachine; 1652 1653 if (machine->kptr_restrict_warned) 1654 return NULL; 1655 1656 if (symbol_conf.kptr_restrict) { 1657 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" 1658 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n" 1659 "Kernel samples will not be resolved.\n"); 1660 machine->kptr_restrict_warned = true; 1661 return NULL; 1662 } 1663 1664 return machine__resolve_kernel_addr(vmachine, addrp, modp); 1665 } 1666 1667 static int trace__symbols_init(struct trace *trace, struct evlist *evlist) 1668 { 1669 int err = symbol__init(NULL); 1670 1671 if (err) 1672 return err; 1673 1674 trace->host = machine__new_host(); 1675 if (trace->host == NULL) 1676 return -ENOMEM; 1677 1678 thread__set_priv_destructor(thread_trace__delete); 1679 1680 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr); 1681 if (err < 0) 1682 goto out; 1683 1684 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target, 1685 evlist->core.threads, trace__tool_process, 1686 true, false, 1); 1687 out: 1688 if (err) 1689 symbol__exit(); 1690 1691 return err; 1692 } 1693 1694 static void trace__symbols__exit(struct trace *trace) 1695 { 1696 machine__exit(trace->host); 1697 trace->host = NULL; 1698 1699 symbol__exit(); 1700 } 1701 1702 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) 1703 { 1704 int idx; 1705 1706 if (nr_args == RAW_SYSCALL_ARGS_NUM && sc->fmt && sc->fmt->nr_args != 0) 1707 nr_args = sc->fmt->nr_args; 1708 1709 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt)); 1710 if (sc->arg_fmt == NULL) 1711 return -1; 1712 1713 for (idx = 0; idx < nr_args; ++idx) { 1714 if (sc->fmt) 1715 sc->arg_fmt[idx] = sc->fmt->arg[idx]; 1716 } 1717 1718 sc->nr_args = nr_args; 1719 return 0; 1720 } 1721 1722 static const struct syscall_arg_fmt syscall_arg_fmts__by_name[] = { 1723 { .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, }, 1724 { .name = "vector", .scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, }, 1725 }; 1726 1727 static int syscall_arg_fmt__cmp(const void *name, const void *fmtp) 1728 { 1729 const struct syscall_arg_fmt *fmt = fmtp; 1730 return strcmp(name, fmt->name); 1731 } 1732 1733 static const struct syscall_arg_fmt * 1734 __syscall_arg_fmt__find_by_name(const struct syscall_arg_fmt *fmts, const int nmemb, 1735 const char *name) 1736 { 1737 return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp); 1738 } 1739 1740 static const struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name) 1741 { 1742 const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name); 1743 return __syscall_arg_fmt__find_by_name(syscall_arg_fmts__by_name, nmemb, name); 1744 } 1745 1746 static struct tep_format_field * 1747 syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field) 1748 { 1749 struct tep_format_field *last_field = NULL; 1750 int len; 1751 1752 for (; field; field = field->next, ++arg) { 1753 last_field = field; 1754 1755 if (arg->scnprintf) 1756 continue; 1757 1758 len = strlen(field->name); 1759 1760 if (strcmp(field->type, "const char *") == 0 && 1761 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) || 1762 strstr(field->name, "path") != NULL)) 1763 arg->scnprintf = SCA_FILENAME; 1764 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr")) 1765 arg->scnprintf = SCA_PTR; 1766 else if (strcmp(field->type, "pid_t") == 0) 1767 arg->scnprintf = SCA_PID; 1768 else if (strcmp(field->type, "umode_t") == 0) 1769 arg->scnprintf = SCA_MODE_T; 1770 else if ((field->flags & TEP_FIELD_IS_ARRAY) && strstr(field->type, "char")) { 1771 arg->scnprintf = SCA_CHAR_ARRAY; 1772 arg->nr_entries = field->arraylen; 1773 } else if ((strcmp(field->type, "int") == 0 || 1774 strcmp(field->type, "unsigned int") == 0 || 1775 strcmp(field->type, "long") == 0) && 1776 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) { 1777 /* 1778 * /sys/kernel/tracing/events/syscalls/sys_enter* 1779 * grep -E 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c 1780 * 65 int 1781 * 23 unsigned int 1782 * 7 unsigned long 1783 */ 1784 arg->scnprintf = SCA_FD; 1785 } else { 1786 const struct syscall_arg_fmt *fmt = 1787 syscall_arg_fmt__find_by_name(field->name); 1788 1789 if (fmt) { 1790 arg->scnprintf = fmt->scnprintf; 1791 arg->strtoul = fmt->strtoul; 1792 } 1793 } 1794 } 1795 1796 return last_field; 1797 } 1798 1799 static int syscall__set_arg_fmts(struct syscall *sc) 1800 { 1801 struct tep_format_field *last_field = syscall_arg_fmt__init_array(sc->arg_fmt, sc->args); 1802 1803 if (last_field) 1804 sc->args_size = last_field->offset + last_field->size; 1805 1806 return 0; 1807 } 1808 1809 static int trace__read_syscall_info(struct trace *trace, int id) 1810 { 1811 char tp_name[128]; 1812 struct syscall *sc; 1813 const char *name = syscalltbl__name(trace->sctbl, id); 1814 1815 #ifdef HAVE_SYSCALL_TABLE_SUPPORT 1816 if (trace->syscalls.table == NULL) { 1817 trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc)); 1818 if (trace->syscalls.table == NULL) 1819 return -ENOMEM; 1820 } 1821 #else 1822 if (id > trace->sctbl->syscalls.max_id || (id == 0 && trace->syscalls.table == NULL)) { 1823 // When using libaudit we don't know beforehand what is the max syscall id 1824 struct syscall *table = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc)); 1825 1826 if (table == NULL) 1827 return -ENOMEM; 1828 1829 // Need to memset from offset 0 and +1 members if brand new 1830 if (trace->syscalls.table == NULL) 1831 memset(table, 0, (id + 1) * sizeof(*sc)); 1832 else 1833 memset(table + trace->sctbl->syscalls.max_id + 1, 0, (id - trace->sctbl->syscalls.max_id) * sizeof(*sc)); 1834 1835 trace->syscalls.table = table; 1836 trace->sctbl->syscalls.max_id = id; 1837 } 1838 #endif 1839 sc = trace->syscalls.table + id; 1840 if (sc->nonexistent) 1841 return -EEXIST; 1842 1843 if (name == NULL) { 1844 sc->nonexistent = true; 1845 return -EEXIST; 1846 } 1847 1848 sc->name = name; 1849 sc->fmt = syscall_fmt__find(sc->name); 1850 1851 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name); 1852 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1853 1854 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) { 1855 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias); 1856 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1857 } 1858 1859 /* 1860 * Fails to read trace point format via sysfs node, so the trace point 1861 * doesn't exist. Set the 'nonexistent' flag as true. 1862 */ 1863 if (IS_ERR(sc->tp_format)) { 1864 sc->nonexistent = true; 1865 return PTR_ERR(sc->tp_format); 1866 } 1867 1868 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 1869 RAW_SYSCALL_ARGS_NUM : sc->tp_format->format.nr_fields)) 1870 return -ENOMEM; 1871 1872 sc->args = sc->tp_format->format.fields; 1873 /* 1874 * We need to check and discard the first variable '__syscall_nr' 1875 * or 'nr' that mean the syscall number. It is needless here. 1876 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels. 1877 */ 1878 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) { 1879 sc->args = sc->args->next; 1880 --sc->nr_args; 1881 } 1882 1883 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit"); 1884 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat"); 1885 1886 return syscall__set_arg_fmts(sc); 1887 } 1888 1889 static int evsel__init_tp_arg_scnprintf(struct evsel *evsel) 1890 { 1891 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel); 1892 1893 if (fmt != NULL) { 1894 syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields); 1895 return 0; 1896 } 1897 1898 return -ENOMEM; 1899 } 1900 1901 static int intcmp(const void *a, const void *b) 1902 { 1903 const int *one = a, *another = b; 1904 1905 return *one - *another; 1906 } 1907 1908 static int trace__validate_ev_qualifier(struct trace *trace) 1909 { 1910 int err = 0; 1911 bool printed_invalid_prefix = false; 1912 struct str_node *pos; 1913 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier); 1914 1915 trace->ev_qualifier_ids.entries = malloc(nr_allocated * 1916 sizeof(trace->ev_qualifier_ids.entries[0])); 1917 1918 if (trace->ev_qualifier_ids.entries == NULL) { 1919 fputs("Error:\tNot enough memory for allocating events qualifier ids\n", 1920 trace->output); 1921 err = -EINVAL; 1922 goto out; 1923 } 1924 1925 strlist__for_each_entry(pos, trace->ev_qualifier) { 1926 const char *sc = pos->s; 1927 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1; 1928 1929 if (id < 0) { 1930 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next); 1931 if (id >= 0) 1932 goto matches; 1933 1934 if (!printed_invalid_prefix) { 1935 pr_debug("Skipping unknown syscalls: "); 1936 printed_invalid_prefix = true; 1937 } else { 1938 pr_debug(", "); 1939 } 1940 1941 pr_debug("%s", sc); 1942 continue; 1943 } 1944 matches: 1945 trace->ev_qualifier_ids.entries[nr_used++] = id; 1946 if (match_next == -1) 1947 continue; 1948 1949 while (1) { 1950 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next); 1951 if (id < 0) 1952 break; 1953 if (nr_allocated == nr_used) { 1954 void *entries; 1955 1956 nr_allocated += 8; 1957 entries = realloc(trace->ev_qualifier_ids.entries, 1958 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0])); 1959 if (entries == NULL) { 1960 err = -ENOMEM; 1961 fputs("\nError:\t Not enough memory for parsing\n", trace->output); 1962 goto out_free; 1963 } 1964 trace->ev_qualifier_ids.entries = entries; 1965 } 1966 trace->ev_qualifier_ids.entries[nr_used++] = id; 1967 } 1968 } 1969 1970 trace->ev_qualifier_ids.nr = nr_used; 1971 qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp); 1972 out: 1973 if (printed_invalid_prefix) 1974 pr_debug("\n"); 1975 return err; 1976 out_free: 1977 zfree(&trace->ev_qualifier_ids.entries); 1978 trace->ev_qualifier_ids.nr = 0; 1979 goto out; 1980 } 1981 1982 static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id) 1983 { 1984 bool in_ev_qualifier; 1985 1986 if (trace->ev_qualifier_ids.nr == 0) 1987 return true; 1988 1989 in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries, 1990 trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL; 1991 1992 if (in_ev_qualifier) 1993 return !trace->not_ev_qualifier; 1994 1995 return trace->not_ev_qualifier; 1996 } 1997 1998 /* 1999 * args is to be interpreted as a series of longs but we need to handle 2000 * 8-byte unaligned accesses. args points to raw_data within the event 2001 * and raw_data is guaranteed to be 8-byte unaligned because it is 2002 * preceded by raw_size which is a u32. So we need to copy args to a temp 2003 * variable to read it. Most notably this avoids extended load instructions 2004 * on unaligned addresses 2005 */ 2006 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx) 2007 { 2008 unsigned long val; 2009 unsigned char *p = arg->args + sizeof(unsigned long) * idx; 2010 2011 memcpy(&val, p, sizeof(val)); 2012 return val; 2013 } 2014 2015 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size, 2016 struct syscall_arg *arg) 2017 { 2018 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name) 2019 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name); 2020 2021 return scnprintf(bf, size, "arg%d: ", arg->idx); 2022 } 2023 2024 /* 2025 * Check if the value is in fact zero, i.e. mask whatever needs masking, such 2026 * as mount 'flags' argument that needs ignoring some magic flag, see comment 2027 * in tools/perf/trace/beauty/mount_flags.c 2028 */ 2029 static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val) 2030 { 2031 if (fmt && fmt->mask_val) 2032 return fmt->mask_val(arg, val); 2033 2034 return val; 2035 } 2036 2037 static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size, 2038 struct syscall_arg *arg, unsigned long val) 2039 { 2040 if (fmt && fmt->scnprintf) { 2041 arg->val = val; 2042 if (fmt->parm) 2043 arg->parm = fmt->parm; 2044 return fmt->scnprintf(bf, size, arg); 2045 } 2046 return scnprintf(bf, size, "%ld", val); 2047 } 2048 2049 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, 2050 unsigned char *args, void *augmented_args, int augmented_args_size, 2051 struct trace *trace, struct thread *thread) 2052 { 2053 size_t printed = 0; 2054 unsigned long val; 2055 u8 bit = 1; 2056 struct syscall_arg arg = { 2057 .args = args, 2058 .augmented = { 2059 .size = augmented_args_size, 2060 .args = augmented_args, 2061 }, 2062 .idx = 0, 2063 .mask = 0, 2064 .trace = trace, 2065 .thread = thread, 2066 .show_string_prefix = trace->show_string_prefix, 2067 }; 2068 struct thread_trace *ttrace = thread__priv(thread); 2069 2070 /* 2071 * Things like fcntl will set this in its 'cmd' formatter to pick the 2072 * right formatter for the return value (an fd? file flags?), which is 2073 * not needed for syscalls that always return a given type, say an fd. 2074 */ 2075 ttrace->ret_scnprintf = NULL; 2076 2077 if (sc->args != NULL) { 2078 struct tep_format_field *field; 2079 2080 for (field = sc->args; field; 2081 field = field->next, ++arg.idx, bit <<= 1) { 2082 if (arg.mask & bit) 2083 continue; 2084 2085 arg.fmt = &sc->arg_fmt[arg.idx]; 2086 val = syscall_arg__val(&arg, arg.idx); 2087 /* 2088 * Some syscall args need some mask, most don't and 2089 * return val untouched. 2090 */ 2091 val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val); 2092 2093 /* 2094 * Suppress this argument if its value is zero and show_zero 2095 * property isn't set. 2096 */ 2097 if (val == 0 && !trace->show_zeros && 2098 !(sc->arg_fmt && sc->arg_fmt[arg.idx].show_zero)) 2099 continue; 2100 2101 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); 2102 2103 if (trace->show_arg_names) 2104 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); 2105 2106 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], 2107 bf + printed, size - printed, &arg, val); 2108 } 2109 } else if (IS_ERR(sc->tp_format)) { 2110 /* 2111 * If we managed to read the tracepoint /format file, then we 2112 * may end up not having any args, like with gettid(), so only 2113 * print the raw args when we didn't manage to read it. 2114 */ 2115 while (arg.idx < sc->nr_args) { 2116 if (arg.mask & bit) 2117 goto next_arg; 2118 val = syscall_arg__val(&arg, arg.idx); 2119 if (printed) 2120 printed += scnprintf(bf + printed, size - printed, ", "); 2121 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg); 2122 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val); 2123 next_arg: 2124 ++arg.idx; 2125 bit <<= 1; 2126 } 2127 } 2128 2129 return printed; 2130 } 2131 2132 typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel, 2133 union perf_event *event, 2134 struct perf_sample *sample); 2135 2136 static struct syscall *trace__syscall_info(struct trace *trace, 2137 struct evsel *evsel, int id) 2138 { 2139 int err = 0; 2140 2141 if (id < 0) { 2142 2143 /* 2144 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried 2145 * before that, leaving at a higher verbosity level till that is 2146 * explained. Reproduced with plain ftrace with: 2147 * 2148 * echo 1 > /t/events/raw_syscalls/sys_exit/enable 2149 * grep "NR -1 " /t/trace_pipe 2150 * 2151 * After generating some load on the machine. 2152 */ 2153 if (verbose > 1) { 2154 static u64 n; 2155 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n", 2156 id, evsel__name(evsel), ++n); 2157 } 2158 return NULL; 2159 } 2160 2161 err = -EINVAL; 2162 2163 #ifdef HAVE_SYSCALL_TABLE_SUPPORT 2164 if (id > trace->sctbl->syscalls.max_id) { 2165 #else 2166 if (id >= trace->sctbl->syscalls.max_id) { 2167 /* 2168 * With libaudit we don't know beforehand what is the max_id, 2169 * so we let trace__read_syscall_info() figure that out as we 2170 * go on reading syscalls. 2171 */ 2172 err = trace__read_syscall_info(trace, id); 2173 if (err) 2174 #endif 2175 goto out_cant_read; 2176 } 2177 2178 if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) && 2179 (err = trace__read_syscall_info(trace, id)) != 0) 2180 goto out_cant_read; 2181 2182 if (trace->syscalls.table && trace->syscalls.table[id].nonexistent) 2183 goto out_cant_read; 2184 2185 return &trace->syscalls.table[id]; 2186 2187 out_cant_read: 2188 if (verbose > 0) { 2189 char sbuf[STRERR_BUFSIZE]; 2190 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf))); 2191 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL) 2192 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name); 2193 fputs(" information\n", trace->output); 2194 } 2195 return NULL; 2196 } 2197 2198 struct syscall_stats { 2199 struct stats stats; 2200 u64 nr_failures; 2201 int max_errno; 2202 u32 *errnos; 2203 }; 2204 2205 static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace, 2206 int id, struct perf_sample *sample, long err, bool errno_summary) 2207 { 2208 struct int_node *inode; 2209 struct syscall_stats *stats; 2210 u64 duration = 0; 2211 2212 inode = intlist__findnew(ttrace->syscall_stats, id); 2213 if (inode == NULL) 2214 return; 2215 2216 stats = inode->priv; 2217 if (stats == NULL) { 2218 stats = zalloc(sizeof(*stats)); 2219 if (stats == NULL) 2220 return; 2221 2222 init_stats(&stats->stats); 2223 inode->priv = stats; 2224 } 2225 2226 if (ttrace->entry_time && sample->time > ttrace->entry_time) 2227 duration = sample->time - ttrace->entry_time; 2228 2229 update_stats(&stats->stats, duration); 2230 2231 if (err < 0) { 2232 ++stats->nr_failures; 2233 2234 if (!errno_summary) 2235 return; 2236 2237 err = -err; 2238 if (err > stats->max_errno) { 2239 u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32)); 2240 2241 if (new_errnos) { 2242 memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32)); 2243 } else { 2244 pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n", 2245 thread__comm_str(thread), thread__pid(thread), 2246 thread__tid(thread)); 2247 return; 2248 } 2249 2250 stats->errnos = new_errnos; 2251 stats->max_errno = err; 2252 } 2253 2254 ++stats->errnos[err - 1]; 2255 } 2256 } 2257 2258 static int trace__printf_interrupted_entry(struct trace *trace) 2259 { 2260 struct thread_trace *ttrace; 2261 size_t printed; 2262 int len; 2263 2264 if (trace->failure_only || trace->current == NULL) 2265 return 0; 2266 2267 ttrace = thread__priv(trace->current); 2268 2269 if (!ttrace->entry_pending) 2270 return 0; 2271 2272 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output); 2273 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str); 2274 2275 if (len < trace->args_alignment - 4) 2276 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " "); 2277 2278 printed += fprintf(trace->output, " ...\n"); 2279 2280 ttrace->entry_pending = false; 2281 ++trace->nr_events_printed; 2282 2283 return printed; 2284 } 2285 2286 static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel, 2287 struct perf_sample *sample, struct thread *thread) 2288 { 2289 int printed = 0; 2290 2291 if (trace->print_sample) { 2292 double ts = (double)sample->time / NSEC_PER_MSEC; 2293 2294 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n", 2295 evsel__name(evsel), ts, 2296 thread__comm_str(thread), 2297 sample->pid, sample->tid, sample->cpu); 2298 } 2299 2300 return printed; 2301 } 2302 2303 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size) 2304 { 2305 void *augmented_args = NULL; 2306 /* 2307 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter 2308 * and there we get all 6 syscall args plus the tracepoint common fields 2309 * that gets calculated at the start and the syscall_nr (another long). 2310 * So we check if that is the case and if so don't look after the 2311 * sc->args_size but always after the full raw_syscalls:sys_enter payload, 2312 * which is fixed. 2313 * 2314 * We'll revisit this later to pass s->args_size to the BPF augmenter 2315 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it 2316 * copies only what we need for each syscall, like what happens when we 2317 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace 2318 * traffic to just what is needed for each syscall. 2319 */ 2320 int args_size = raw_augmented_args_size ?: sc->args_size; 2321 2322 *augmented_args_size = sample->raw_size - args_size; 2323 if (*augmented_args_size > 0) 2324 augmented_args = sample->raw_data + args_size; 2325 2326 return augmented_args; 2327 } 2328 2329 static void syscall__exit(struct syscall *sc) 2330 { 2331 if (!sc) 2332 return; 2333 2334 zfree(&sc->arg_fmt); 2335 } 2336 2337 static int trace__sys_enter(struct trace *trace, struct evsel *evsel, 2338 union perf_event *event __maybe_unused, 2339 struct perf_sample *sample) 2340 { 2341 char *msg; 2342 void *args; 2343 int printed = 0; 2344 struct thread *thread; 2345 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 2346 int augmented_args_size = 0; 2347 void *augmented_args = NULL; 2348 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2349 struct thread_trace *ttrace; 2350 2351 if (sc == NULL) 2352 return -1; 2353 2354 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2355 ttrace = thread__trace(thread, trace->output); 2356 if (ttrace == NULL) 2357 goto out_put; 2358 2359 trace__fprintf_sample(trace, evsel, sample, thread); 2360 2361 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 2362 2363 if (ttrace->entry_str == NULL) { 2364 ttrace->entry_str = malloc(trace__entry_str_size); 2365 if (!ttrace->entry_str) 2366 goto out_put; 2367 } 2368 2369 if (!(trace->duration_filter || trace->summary_only || trace->min_stack)) 2370 trace__printf_interrupted_entry(trace); 2371 /* 2372 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible 2373 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments 2374 * this breaks syscall__augmented_args() check for augmented args, as we calculate 2375 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file, 2376 * so when handling, say the openat syscall, we end up getting 6 args for the 2377 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly 2378 * thinking that the extra 2 u64 args are the augmented filename, so just check 2379 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one. 2380 */ 2381 if (evsel != trace->syscalls.events.sys_enter) 2382 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 2383 ttrace->entry_time = sample->time; 2384 msg = ttrace->entry_str; 2385 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name); 2386 2387 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed, 2388 args, augmented_args, augmented_args_size, trace, thread); 2389 2390 if (sc->is_exit) { 2391 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) { 2392 int alignment = 0; 2393 2394 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output); 2395 printed = fprintf(trace->output, "%s)", ttrace->entry_str); 2396 if (trace->args_alignment > printed) 2397 alignment = trace->args_alignment - printed; 2398 fprintf(trace->output, "%*s= ?\n", alignment, " "); 2399 } 2400 } else { 2401 ttrace->entry_pending = true; 2402 /* See trace__vfs_getname & trace__sys_exit */ 2403 ttrace->filename.pending_open = false; 2404 } 2405 2406 if (trace->current != thread) { 2407 thread__put(trace->current); 2408 trace->current = thread__get(thread); 2409 } 2410 err = 0; 2411 out_put: 2412 thread__put(thread); 2413 return err; 2414 } 2415 2416 static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel, 2417 struct perf_sample *sample) 2418 { 2419 struct thread_trace *ttrace; 2420 struct thread *thread; 2421 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 2422 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2423 char msg[1024]; 2424 void *args, *augmented_args = NULL; 2425 int augmented_args_size; 2426 2427 if (sc == NULL) 2428 return -1; 2429 2430 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2431 ttrace = thread__trace(thread, trace->output); 2432 /* 2433 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args() 2434 * and the rest of the beautifiers accessing it via struct syscall_arg touches it. 2435 */ 2436 if (ttrace == NULL) 2437 goto out_put; 2438 2439 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 2440 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 2441 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread); 2442 fprintf(trace->output, "%s", msg); 2443 err = 0; 2444 out_put: 2445 thread__put(thread); 2446 return err; 2447 } 2448 2449 static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel, 2450 struct perf_sample *sample, 2451 struct callchain_cursor *cursor) 2452 { 2453 struct addr_location al; 2454 int max_stack = evsel->core.attr.sample_max_stack ? 2455 evsel->core.attr.sample_max_stack : 2456 trace->max_stack; 2457 int err = -1; 2458 2459 addr_location__init(&al); 2460 if (machine__resolve(trace->host, &al, sample) < 0) 2461 goto out; 2462 2463 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack); 2464 out: 2465 addr_location__exit(&al); 2466 return err; 2467 } 2468 2469 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample) 2470 { 2471 /* TODO: user-configurable print_opts */ 2472 const unsigned int print_opts = EVSEL__PRINT_SYM | 2473 EVSEL__PRINT_DSO | 2474 EVSEL__PRINT_UNKNOWN_AS_ADDR; 2475 2476 return sample__fprintf_callchain(sample, 38, print_opts, get_tls_callchain_cursor(), symbol_conf.bt_stop_list, trace->output); 2477 } 2478 2479 static const char *errno_to_name(struct evsel *evsel, int err) 2480 { 2481 struct perf_env *env = evsel__env(evsel); 2482 2483 return perf_env__arch_strerrno(env, err); 2484 } 2485 2486 static int trace__sys_exit(struct trace *trace, struct evsel *evsel, 2487 union perf_event *event __maybe_unused, 2488 struct perf_sample *sample) 2489 { 2490 long ret; 2491 u64 duration = 0; 2492 bool duration_calculated = false; 2493 struct thread *thread; 2494 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0; 2495 int alignment = trace->args_alignment; 2496 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2497 struct thread_trace *ttrace; 2498 2499 if (sc == NULL) 2500 return -1; 2501 2502 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2503 ttrace = thread__trace(thread, trace->output); 2504 if (ttrace == NULL) 2505 goto out_put; 2506 2507 trace__fprintf_sample(trace, evsel, sample, thread); 2508 2509 ret = perf_evsel__sc_tp_uint(evsel, ret, sample); 2510 2511 if (trace->summary) 2512 thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary); 2513 2514 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) { 2515 trace__set_fd_pathname(thread, ret, ttrace->filename.name); 2516 ttrace->filename.pending_open = false; 2517 ++trace->stats.vfs_getname; 2518 } 2519 2520 if (ttrace->entry_time) { 2521 duration = sample->time - ttrace->entry_time; 2522 if (trace__filter_duration(trace, duration)) 2523 goto out; 2524 duration_calculated = true; 2525 } else if (trace->duration_filter) 2526 goto out; 2527 2528 if (sample->callchain) { 2529 struct callchain_cursor *cursor = get_tls_callchain_cursor(); 2530 2531 callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor); 2532 if (callchain_ret == 0) { 2533 if (cursor->nr < trace->min_stack) 2534 goto out; 2535 callchain_ret = 1; 2536 } 2537 } 2538 2539 if (trace->summary_only || (ret >= 0 && trace->failure_only)) 2540 goto out; 2541 2542 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output); 2543 2544 if (ttrace->entry_pending) { 2545 printed = fprintf(trace->output, "%s", ttrace->entry_str); 2546 } else { 2547 printed += fprintf(trace->output, " ... ["); 2548 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued"); 2549 printed += 9; 2550 printed += fprintf(trace->output, "]: %s()", sc->name); 2551 } 2552 2553 printed++; /* the closing ')' */ 2554 2555 if (alignment > printed) 2556 alignment -= printed; 2557 else 2558 alignment = 0; 2559 2560 fprintf(trace->output, ")%*s= ", alignment, " "); 2561 2562 if (sc->fmt == NULL) { 2563 if (ret < 0) 2564 goto errno_print; 2565 signed_print: 2566 fprintf(trace->output, "%ld", ret); 2567 } else if (ret < 0) { 2568 errno_print: { 2569 char bf[STRERR_BUFSIZE]; 2570 const char *emsg = str_error_r(-ret, bf, sizeof(bf)), 2571 *e = errno_to_name(evsel, -ret); 2572 2573 fprintf(trace->output, "-1 %s (%s)", e, emsg); 2574 } 2575 } else if (ret == 0 && sc->fmt->timeout) 2576 fprintf(trace->output, "0 (Timeout)"); 2577 else if (ttrace->ret_scnprintf) { 2578 char bf[1024]; 2579 struct syscall_arg arg = { 2580 .val = ret, 2581 .thread = thread, 2582 .trace = trace, 2583 }; 2584 ttrace->ret_scnprintf(bf, sizeof(bf), &arg); 2585 ttrace->ret_scnprintf = NULL; 2586 fprintf(trace->output, "%s", bf); 2587 } else if (sc->fmt->hexret) 2588 fprintf(trace->output, "%#lx", ret); 2589 else if (sc->fmt->errpid) { 2590 struct thread *child = machine__find_thread(trace->host, ret, ret); 2591 2592 if (child != NULL) { 2593 fprintf(trace->output, "%ld", ret); 2594 if (thread__comm_set(child)) 2595 fprintf(trace->output, " (%s)", thread__comm_str(child)); 2596 thread__put(child); 2597 } 2598 } else 2599 goto signed_print; 2600 2601 fputc('\n', trace->output); 2602 2603 /* 2604 * We only consider an 'event' for the sake of --max-events a non-filtered 2605 * sys_enter + sys_exit and other tracepoint events. 2606 */ 2607 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX) 2608 interrupted = true; 2609 2610 if (callchain_ret > 0) 2611 trace__fprintf_callchain(trace, sample); 2612 else if (callchain_ret < 0) 2613 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); 2614 out: 2615 ttrace->entry_pending = false; 2616 err = 0; 2617 out_put: 2618 thread__put(thread); 2619 return err; 2620 } 2621 2622 static int trace__vfs_getname(struct trace *trace, struct evsel *evsel, 2623 union perf_event *event __maybe_unused, 2624 struct perf_sample *sample) 2625 { 2626 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2627 struct thread_trace *ttrace; 2628 size_t filename_len, entry_str_len, to_move; 2629 ssize_t remaining_space; 2630 char *pos; 2631 const char *filename = evsel__rawptr(evsel, sample, "pathname"); 2632 2633 if (!thread) 2634 goto out; 2635 2636 ttrace = thread__priv(thread); 2637 if (!ttrace) 2638 goto out_put; 2639 2640 filename_len = strlen(filename); 2641 if (filename_len == 0) 2642 goto out_put; 2643 2644 if (ttrace->filename.namelen < filename_len) { 2645 char *f = realloc(ttrace->filename.name, filename_len + 1); 2646 2647 if (f == NULL) 2648 goto out_put; 2649 2650 ttrace->filename.namelen = filename_len; 2651 ttrace->filename.name = f; 2652 } 2653 2654 strcpy(ttrace->filename.name, filename); 2655 ttrace->filename.pending_open = true; 2656 2657 if (!ttrace->filename.ptr) 2658 goto out_put; 2659 2660 entry_str_len = strlen(ttrace->entry_str); 2661 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */ 2662 if (remaining_space <= 0) 2663 goto out_put; 2664 2665 if (filename_len > (size_t)remaining_space) { 2666 filename += filename_len - remaining_space; 2667 filename_len = remaining_space; 2668 } 2669 2670 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */ 2671 pos = ttrace->entry_str + ttrace->filename.entry_str_pos; 2672 memmove(pos + filename_len, pos, to_move); 2673 memcpy(pos, filename, filename_len); 2674 2675 ttrace->filename.ptr = 0; 2676 ttrace->filename.entry_str_pos = 0; 2677 out_put: 2678 thread__put(thread); 2679 out: 2680 return 0; 2681 } 2682 2683 static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel, 2684 union perf_event *event __maybe_unused, 2685 struct perf_sample *sample) 2686 { 2687 u64 runtime = evsel__intval(evsel, sample, "runtime"); 2688 double runtime_ms = (double)runtime / NSEC_PER_MSEC; 2689 struct thread *thread = machine__findnew_thread(trace->host, 2690 sample->pid, 2691 sample->tid); 2692 struct thread_trace *ttrace = thread__trace(thread, trace->output); 2693 2694 if (ttrace == NULL) 2695 goto out_dump; 2696 2697 ttrace->runtime_ms += runtime_ms; 2698 trace->runtime_ms += runtime_ms; 2699 out_put: 2700 thread__put(thread); 2701 return 0; 2702 2703 out_dump: 2704 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n", 2705 evsel->name, 2706 evsel__strval(evsel, sample, "comm"), 2707 (pid_t)evsel__intval(evsel, sample, "pid"), 2708 runtime, 2709 evsel__intval(evsel, sample, "vruntime")); 2710 goto out_put; 2711 } 2712 2713 static int bpf_output__printer(enum binary_printer_ops op, 2714 unsigned int val, void *extra __maybe_unused, FILE *fp) 2715 { 2716 unsigned char ch = (unsigned char)val; 2717 2718 switch (op) { 2719 case BINARY_PRINT_CHAR_DATA: 2720 return fprintf(fp, "%c", isprint(ch) ? ch : '.'); 2721 case BINARY_PRINT_DATA_BEGIN: 2722 case BINARY_PRINT_LINE_BEGIN: 2723 case BINARY_PRINT_ADDR: 2724 case BINARY_PRINT_NUM_DATA: 2725 case BINARY_PRINT_NUM_PAD: 2726 case BINARY_PRINT_SEP: 2727 case BINARY_PRINT_CHAR_PAD: 2728 case BINARY_PRINT_LINE_END: 2729 case BINARY_PRINT_DATA_END: 2730 default: 2731 break; 2732 } 2733 2734 return 0; 2735 } 2736 2737 static void bpf_output__fprintf(struct trace *trace, 2738 struct perf_sample *sample) 2739 { 2740 binary__fprintf(sample->raw_data, sample->raw_size, 8, 2741 bpf_output__printer, NULL, trace->output); 2742 ++trace->nr_events_printed; 2743 } 2744 2745 static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample, 2746 struct thread *thread, void *augmented_args, int augmented_args_size) 2747 { 2748 char bf[2048]; 2749 size_t size = sizeof(bf); 2750 struct tep_format_field *field = evsel->tp_format->format.fields; 2751 struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel); 2752 size_t printed = 0; 2753 unsigned long val; 2754 u8 bit = 1; 2755 struct syscall_arg syscall_arg = { 2756 .augmented = { 2757 .size = augmented_args_size, 2758 .args = augmented_args, 2759 }, 2760 .idx = 0, 2761 .mask = 0, 2762 .trace = trace, 2763 .thread = thread, 2764 .show_string_prefix = trace->show_string_prefix, 2765 }; 2766 2767 for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) { 2768 if (syscall_arg.mask & bit) 2769 continue; 2770 2771 syscall_arg.len = 0; 2772 syscall_arg.fmt = arg; 2773 if (field->flags & TEP_FIELD_IS_ARRAY) { 2774 int offset = field->offset; 2775 2776 if (field->flags & TEP_FIELD_IS_DYNAMIC) { 2777 offset = format_field__intval(field, sample, evsel->needs_swap); 2778 syscall_arg.len = offset >> 16; 2779 offset &= 0xffff; 2780 if (tep_field_is_relative(field->flags)) 2781 offset += field->offset + field->size; 2782 } 2783 2784 val = (uintptr_t)(sample->raw_data + offset); 2785 } else 2786 val = format_field__intval(field, sample, evsel->needs_swap); 2787 /* 2788 * Some syscall args need some mask, most don't and 2789 * return val untouched. 2790 */ 2791 val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val); 2792 2793 /* Suppress this argument if its value is zero and show_zero property isn't set. */ 2794 if (val == 0 && !trace->show_zeros && !arg->show_zero) 2795 continue; 2796 2797 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); 2798 2799 if (trace->show_arg_names) 2800 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); 2801 2802 printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val); 2803 } 2804 2805 return printed + fprintf(trace->output, "%s", bf); 2806 } 2807 2808 static int trace__event_handler(struct trace *trace, struct evsel *evsel, 2809 union perf_event *event __maybe_unused, 2810 struct perf_sample *sample) 2811 { 2812 struct thread *thread; 2813 int callchain_ret = 0; 2814 /* 2815 * Check if we called perf_evsel__disable(evsel) due to, for instance, 2816 * this event's max_events having been hit and this is an entry coming 2817 * from the ring buffer that we should discard, since the max events 2818 * have already been considered/printed. 2819 */ 2820 if (evsel->disabled) 2821 return 0; 2822 2823 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2824 2825 if (sample->callchain) { 2826 struct callchain_cursor *cursor = get_tls_callchain_cursor(); 2827 2828 callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor); 2829 if (callchain_ret == 0) { 2830 if (cursor->nr < trace->min_stack) 2831 goto out; 2832 callchain_ret = 1; 2833 } 2834 } 2835 2836 trace__printf_interrupted_entry(trace); 2837 trace__fprintf_tstamp(trace, sample->time, trace->output); 2838 2839 if (trace->trace_syscalls && trace->show_duration) 2840 fprintf(trace->output, "( ): "); 2841 2842 if (thread) 2843 trace__fprintf_comm_tid(trace, thread, trace->output); 2844 2845 if (evsel == trace->syscalls.events.bpf_output) { 2846 int id = perf_evsel__sc_tp_uint(evsel, id, sample); 2847 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2848 2849 if (sc) { 2850 fprintf(trace->output, "%s(", sc->name); 2851 trace__fprintf_sys_enter(trace, evsel, sample); 2852 fputc(')', trace->output); 2853 goto newline; 2854 } 2855 2856 /* 2857 * XXX: Not having the associated syscall info or not finding/adding 2858 * the thread should never happen, but if it does... 2859 * fall thru and print it as a bpf_output event. 2860 */ 2861 } 2862 2863 fprintf(trace->output, "%s(", evsel->name); 2864 2865 if (evsel__is_bpf_output(evsel)) { 2866 bpf_output__fprintf(trace, sample); 2867 } else if (evsel->tp_format) { 2868 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) || 2869 trace__fprintf_sys_enter(trace, evsel, sample)) { 2870 if (trace->libtraceevent_print) { 2871 event_format__fprintf(evsel->tp_format, sample->cpu, 2872 sample->raw_data, sample->raw_size, 2873 trace->output); 2874 } else { 2875 trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0); 2876 } 2877 } 2878 } 2879 2880 newline: 2881 fprintf(trace->output, ")\n"); 2882 2883 if (callchain_ret > 0) 2884 trace__fprintf_callchain(trace, sample); 2885 else if (callchain_ret < 0) 2886 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); 2887 2888 ++trace->nr_events_printed; 2889 2890 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) { 2891 evsel__disable(evsel); 2892 evsel__close(evsel); 2893 } 2894 out: 2895 thread__put(thread); 2896 return 0; 2897 } 2898 2899 static void print_location(FILE *f, struct perf_sample *sample, 2900 struct addr_location *al, 2901 bool print_dso, bool print_sym) 2902 { 2903 2904 if ((verbose > 0 || print_dso) && al->map) 2905 fprintf(f, "%s@", dso__long_name(map__dso(al->map))); 2906 2907 if ((verbose > 0 || print_sym) && al->sym) 2908 fprintf(f, "%s+0x%" PRIx64, al->sym->name, 2909 al->addr - al->sym->start); 2910 else if (al->map) 2911 fprintf(f, "0x%" PRIx64, al->addr); 2912 else 2913 fprintf(f, "0x%" PRIx64, sample->addr); 2914 } 2915 2916 static int trace__pgfault(struct trace *trace, 2917 struct evsel *evsel, 2918 union perf_event *event __maybe_unused, 2919 struct perf_sample *sample) 2920 { 2921 struct thread *thread; 2922 struct addr_location al; 2923 char map_type = 'd'; 2924 struct thread_trace *ttrace; 2925 int err = -1; 2926 int callchain_ret = 0; 2927 2928 addr_location__init(&al); 2929 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2930 2931 if (sample->callchain) { 2932 struct callchain_cursor *cursor = get_tls_callchain_cursor(); 2933 2934 callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor); 2935 if (callchain_ret == 0) { 2936 if (cursor->nr < trace->min_stack) 2937 goto out_put; 2938 callchain_ret = 1; 2939 } 2940 } 2941 2942 ttrace = thread__trace(thread, trace->output); 2943 if (ttrace == NULL) 2944 goto out_put; 2945 2946 if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ) 2947 ttrace->pfmaj++; 2948 else 2949 ttrace->pfmin++; 2950 2951 if (trace->summary_only) 2952 goto out; 2953 2954 thread__find_symbol(thread, sample->cpumode, sample->ip, &al); 2955 2956 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output); 2957 2958 fprintf(trace->output, "%sfault [", 2959 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ? 2960 "maj" : "min"); 2961 2962 print_location(trace->output, sample, &al, false, true); 2963 2964 fprintf(trace->output, "] => "); 2965 2966 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2967 2968 if (!al.map) { 2969 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2970 2971 if (al.map) 2972 map_type = 'x'; 2973 else 2974 map_type = '?'; 2975 } 2976 2977 print_location(trace->output, sample, &al, true, false); 2978 2979 fprintf(trace->output, " (%c%c)\n", map_type, al.level); 2980 2981 if (callchain_ret > 0) 2982 trace__fprintf_callchain(trace, sample); 2983 else if (callchain_ret < 0) 2984 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); 2985 2986 ++trace->nr_events_printed; 2987 out: 2988 err = 0; 2989 out_put: 2990 thread__put(thread); 2991 addr_location__exit(&al); 2992 return err; 2993 } 2994 2995 static void trace__set_base_time(struct trace *trace, 2996 struct evsel *evsel, 2997 struct perf_sample *sample) 2998 { 2999 /* 3000 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust 3001 * and don't use sample->time unconditionally, we may end up having 3002 * some other event in the future without PERF_SAMPLE_TIME for good 3003 * reason, i.e. we may not be interested in its timestamps, just in 3004 * it taking place, picking some piece of information when it 3005 * appears in our event stream (vfs_getname comes to mind). 3006 */ 3007 if (trace->base_time == 0 && !trace->full_time && 3008 (evsel->core.attr.sample_type & PERF_SAMPLE_TIME)) 3009 trace->base_time = sample->time; 3010 } 3011 3012 static int trace__process_sample(struct perf_tool *tool, 3013 union perf_event *event, 3014 struct perf_sample *sample, 3015 struct evsel *evsel, 3016 struct machine *machine __maybe_unused) 3017 { 3018 struct trace *trace = container_of(tool, struct trace, tool); 3019 struct thread *thread; 3020 int err = 0; 3021 3022 tracepoint_handler handler = evsel->handler; 3023 3024 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 3025 if (thread && thread__is_filtered(thread)) 3026 goto out; 3027 3028 trace__set_base_time(trace, evsel, sample); 3029 3030 if (handler) { 3031 ++trace->nr_events; 3032 handler(trace, evsel, event, sample); 3033 } 3034 out: 3035 thread__put(thread); 3036 return err; 3037 } 3038 3039 static int trace__record(struct trace *trace, int argc, const char **argv) 3040 { 3041 unsigned int rec_argc, i, j; 3042 const char **rec_argv; 3043 const char * const record_args[] = { 3044 "record", 3045 "-R", 3046 "-m", "1024", 3047 "-c", "1", 3048 }; 3049 pid_t pid = getpid(); 3050 char *filter = asprintf__tp_filter_pids(1, &pid); 3051 const char * const sc_args[] = { "-e", }; 3052 unsigned int sc_args_nr = ARRAY_SIZE(sc_args); 3053 const char * const majpf_args[] = { "-e", "major-faults" }; 3054 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args); 3055 const char * const minpf_args[] = { "-e", "minor-faults" }; 3056 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args); 3057 int err = -1; 3058 3059 /* +3 is for the event string below and the pid filter */ 3060 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 + 3061 majpf_args_nr + minpf_args_nr + argc; 3062 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 3063 3064 if (rec_argv == NULL || filter == NULL) 3065 goto out_free; 3066 3067 j = 0; 3068 for (i = 0; i < ARRAY_SIZE(record_args); i++) 3069 rec_argv[j++] = record_args[i]; 3070 3071 if (trace->trace_syscalls) { 3072 for (i = 0; i < sc_args_nr; i++) 3073 rec_argv[j++] = sc_args[i]; 3074 3075 /* event string may be different for older kernels - e.g., RHEL6 */ 3076 if (is_valid_tracepoint("raw_syscalls:sys_enter")) 3077 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit"; 3078 else if (is_valid_tracepoint("syscalls:sys_enter")) 3079 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit"; 3080 else { 3081 pr_err("Neither raw_syscalls nor syscalls events exist.\n"); 3082 goto out_free; 3083 } 3084 } 3085 3086 rec_argv[j++] = "--filter"; 3087 rec_argv[j++] = filter; 3088 3089 if (trace->trace_pgfaults & TRACE_PFMAJ) 3090 for (i = 0; i < majpf_args_nr; i++) 3091 rec_argv[j++] = majpf_args[i]; 3092 3093 if (trace->trace_pgfaults & TRACE_PFMIN) 3094 for (i = 0; i < minpf_args_nr; i++) 3095 rec_argv[j++] = minpf_args[i]; 3096 3097 for (i = 0; i < (unsigned int)argc; i++) 3098 rec_argv[j++] = argv[i]; 3099 3100 err = cmd_record(j, rec_argv); 3101 out_free: 3102 free(filter); 3103 free(rec_argv); 3104 return err; 3105 } 3106 3107 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp); 3108 3109 static bool evlist__add_vfs_getname(struct evlist *evlist) 3110 { 3111 bool found = false; 3112 struct evsel *evsel, *tmp; 3113 struct parse_events_error err; 3114 int ret; 3115 3116 parse_events_error__init(&err); 3117 ret = parse_events(evlist, "probe:vfs_getname*", &err); 3118 parse_events_error__exit(&err); 3119 if (ret) 3120 return false; 3121 3122 evlist__for_each_entry_safe(evlist, evsel, tmp) { 3123 if (!strstarts(evsel__name(evsel), "probe:vfs_getname")) 3124 continue; 3125 3126 if (evsel__field(evsel, "pathname")) { 3127 evsel->handler = trace__vfs_getname; 3128 found = true; 3129 continue; 3130 } 3131 3132 list_del_init(&evsel->core.node); 3133 evsel->evlist = NULL; 3134 evsel__delete(evsel); 3135 } 3136 3137 return found; 3138 } 3139 3140 static struct evsel *evsel__new_pgfault(u64 config) 3141 { 3142 struct evsel *evsel; 3143 struct perf_event_attr attr = { 3144 .type = PERF_TYPE_SOFTWARE, 3145 .mmap_data = 1, 3146 }; 3147 3148 attr.config = config; 3149 attr.sample_period = 1; 3150 3151 event_attr_init(&attr); 3152 3153 evsel = evsel__new(&attr); 3154 if (evsel) 3155 evsel->handler = trace__pgfault; 3156 3157 return evsel; 3158 } 3159 3160 static void evlist__free_syscall_tp_fields(struct evlist *evlist) 3161 { 3162 struct evsel *evsel; 3163 3164 evlist__for_each_entry(evlist, evsel) { 3165 evsel_trace__delete(evsel->priv); 3166 evsel->priv = NULL; 3167 } 3168 } 3169 3170 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample) 3171 { 3172 const u32 type = event->header.type; 3173 struct evsel *evsel; 3174 3175 if (type != PERF_RECORD_SAMPLE) { 3176 trace__process_event(trace, trace->host, event, sample); 3177 return; 3178 } 3179 3180 evsel = evlist__id2evsel(trace->evlist, sample->id); 3181 if (evsel == NULL) { 3182 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id); 3183 return; 3184 } 3185 3186 if (evswitch__discard(&trace->evswitch, evsel)) 3187 return; 3188 3189 trace__set_base_time(trace, evsel, sample); 3190 3191 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT && 3192 sample->raw_data == NULL) { 3193 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n", 3194 evsel__name(evsel), sample->tid, 3195 sample->cpu, sample->raw_size); 3196 } else { 3197 tracepoint_handler handler = evsel->handler; 3198 handler(trace, evsel, event, sample); 3199 } 3200 3201 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX) 3202 interrupted = true; 3203 } 3204 3205 static int trace__add_syscall_newtp(struct trace *trace) 3206 { 3207 int ret = -1; 3208 struct evlist *evlist = trace->evlist; 3209 struct evsel *sys_enter, *sys_exit; 3210 3211 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter); 3212 if (sys_enter == NULL) 3213 goto out; 3214 3215 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args)) 3216 goto out_delete_sys_enter; 3217 3218 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit); 3219 if (sys_exit == NULL) 3220 goto out_delete_sys_enter; 3221 3222 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret)) 3223 goto out_delete_sys_exit; 3224 3225 evsel__config_callchain(sys_enter, &trace->opts, &callchain_param); 3226 evsel__config_callchain(sys_exit, &trace->opts, &callchain_param); 3227 3228 evlist__add(evlist, sys_enter); 3229 evlist__add(evlist, sys_exit); 3230 3231 if (callchain_param.enabled && !trace->kernel_syscallchains) { 3232 /* 3233 * We're interested only in the user space callchain 3234 * leading to the syscall, allow overriding that for 3235 * debugging reasons using --kernel_syscall_callchains 3236 */ 3237 sys_exit->core.attr.exclude_callchain_kernel = 1; 3238 } 3239 3240 trace->syscalls.events.sys_enter = sys_enter; 3241 trace->syscalls.events.sys_exit = sys_exit; 3242 3243 ret = 0; 3244 out: 3245 return ret; 3246 3247 out_delete_sys_exit: 3248 evsel__delete_priv(sys_exit); 3249 out_delete_sys_enter: 3250 evsel__delete_priv(sys_enter); 3251 goto out; 3252 } 3253 3254 static int trace__set_ev_qualifier_tp_filter(struct trace *trace) 3255 { 3256 int err = -1; 3257 struct evsel *sys_exit; 3258 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier, 3259 trace->ev_qualifier_ids.nr, 3260 trace->ev_qualifier_ids.entries); 3261 3262 if (filter == NULL) 3263 goto out_enomem; 3264 3265 if (!evsel__append_tp_filter(trace->syscalls.events.sys_enter, filter)) { 3266 sys_exit = trace->syscalls.events.sys_exit; 3267 err = evsel__append_tp_filter(sys_exit, filter); 3268 } 3269 3270 free(filter); 3271 out: 3272 return err; 3273 out_enomem: 3274 errno = ENOMEM; 3275 goto out; 3276 } 3277 3278 #ifdef HAVE_BPF_SKEL 3279 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name) 3280 { 3281 struct bpf_program *pos, *prog = NULL; 3282 const char *sec_name; 3283 3284 if (trace->skel->obj == NULL) 3285 return NULL; 3286 3287 bpf_object__for_each_program(pos, trace->skel->obj) { 3288 sec_name = bpf_program__section_name(pos); 3289 if (sec_name && !strcmp(sec_name, name)) { 3290 prog = pos; 3291 break; 3292 } 3293 } 3294 3295 return prog; 3296 } 3297 3298 static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc, 3299 const char *prog_name, const char *type) 3300 { 3301 struct bpf_program *prog; 3302 3303 if (prog_name == NULL) { 3304 char default_prog_name[256]; 3305 scnprintf(default_prog_name, sizeof(default_prog_name), "tp/syscalls/sys_%s_%s", type, sc->name); 3306 prog = trace__find_bpf_program_by_title(trace, default_prog_name); 3307 if (prog != NULL) 3308 goto out_found; 3309 if (sc->fmt && sc->fmt->alias) { 3310 scnprintf(default_prog_name, sizeof(default_prog_name), "tp/syscalls/sys_%s_%s", type, sc->fmt->alias); 3311 prog = trace__find_bpf_program_by_title(trace, default_prog_name); 3312 if (prog != NULL) 3313 goto out_found; 3314 } 3315 goto out_unaugmented; 3316 } 3317 3318 prog = trace__find_bpf_program_by_title(trace, prog_name); 3319 3320 if (prog != NULL) { 3321 out_found: 3322 return prog; 3323 } 3324 3325 pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n", 3326 prog_name, type, sc->name); 3327 out_unaugmented: 3328 return trace->skel->progs.syscall_unaugmented; 3329 } 3330 3331 static void trace__init_syscall_bpf_progs(struct trace *trace, int id) 3332 { 3333 struct syscall *sc = trace__syscall_info(trace, NULL, id); 3334 3335 if (sc == NULL) 3336 return; 3337 3338 sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter"); 3339 sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit"); 3340 } 3341 3342 static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id) 3343 { 3344 struct syscall *sc = trace__syscall_info(trace, NULL, id); 3345 return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->skel->progs.syscall_unaugmented); 3346 } 3347 3348 static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id) 3349 { 3350 struct syscall *sc = trace__syscall_info(trace, NULL, id); 3351 return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->skel->progs.syscall_unaugmented); 3352 } 3353 3354 static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc) 3355 { 3356 struct tep_format_field *field, *candidate_field; 3357 /* 3358 * We're only interested in syscalls that have a pointer: 3359 */ 3360 for (field = sc->args; field; field = field->next) { 3361 if (field->flags & TEP_FIELD_IS_POINTER) 3362 goto try_to_find_pair; 3363 } 3364 3365 return NULL; 3366 3367 try_to_find_pair: 3368 for (int i = 0; i < trace->sctbl->syscalls.nr_entries; ++i) { 3369 int id = syscalltbl__id_at_idx(trace->sctbl, i); 3370 struct syscall *pair = trace__syscall_info(trace, NULL, id); 3371 struct bpf_program *pair_prog; 3372 bool is_candidate = false; 3373 3374 if (pair == NULL || pair == sc || 3375 pair->bpf_prog.sys_enter == trace->skel->progs.syscall_unaugmented) 3376 continue; 3377 3378 for (field = sc->args, candidate_field = pair->args; 3379 field && candidate_field; field = field->next, candidate_field = candidate_field->next) { 3380 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER, 3381 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER; 3382 3383 if (is_pointer) { 3384 if (!candidate_is_pointer) { 3385 // The candidate just doesn't copies our pointer arg, might copy other pointers we want. 3386 continue; 3387 } 3388 } else { 3389 if (candidate_is_pointer) { 3390 // The candidate might copy a pointer we don't have, skip it. 3391 goto next_candidate; 3392 } 3393 continue; 3394 } 3395 3396 if (strcmp(field->type, candidate_field->type)) 3397 goto next_candidate; 3398 3399 /* 3400 * This is limited in the BPF program but sys_write 3401 * uses "const char *" for its "buf" arg so we need to 3402 * use some heuristic that is kinda future proof... 3403 */ 3404 if (strcmp(field->type, "const char *") == 0 && 3405 !(strstr(field->name, "name") || 3406 strstr(field->name, "path") || 3407 strstr(field->name, "file") || 3408 strstr(field->name, "root") || 3409 strstr(field->name, "description"))) 3410 goto next_candidate; 3411 3412 is_candidate = true; 3413 } 3414 3415 if (!is_candidate) 3416 goto next_candidate; 3417 3418 /* 3419 * Check if the tentative pair syscall augmenter has more pointers, if it has, 3420 * then it may be collecting that and we then can't use it, as it would collect 3421 * more than what is common to the two syscalls. 3422 */ 3423 if (candidate_field) { 3424 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next) 3425 if (candidate_field->flags & TEP_FIELD_IS_POINTER) 3426 goto next_candidate; 3427 } 3428 3429 pair_prog = pair->bpf_prog.sys_enter; 3430 /* 3431 * If the pair isn't enabled, then its bpf_prog.sys_enter will not 3432 * have been searched for, so search it here and if it returns the 3433 * unaugmented one, then ignore it, otherwise we'll reuse that BPF 3434 * program for a filtered syscall on a non-filtered one. 3435 * 3436 * For instance, we have "!syscalls:sys_enter_renameat" and that is 3437 * useful for "renameat2". 3438 */ 3439 if (pair_prog == NULL) { 3440 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter"); 3441 if (pair_prog == trace->skel->progs.syscall_unaugmented) 3442 goto next_candidate; 3443 } 3444 3445 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name); 3446 return pair_prog; 3447 next_candidate: 3448 continue; 3449 } 3450 3451 return NULL; 3452 } 3453 3454 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace) 3455 { 3456 int map_enter_fd = bpf_map__fd(trace->skel->maps.syscalls_sys_enter); 3457 int map_exit_fd = bpf_map__fd(trace->skel->maps.syscalls_sys_exit); 3458 int err = 0; 3459 3460 for (int i = 0; i < trace->sctbl->syscalls.nr_entries; ++i) { 3461 int prog_fd, key = syscalltbl__id_at_idx(trace->sctbl, i); 3462 3463 if (!trace__syscall_enabled(trace, key)) 3464 continue; 3465 3466 trace__init_syscall_bpf_progs(trace, key); 3467 3468 // It'll get at least the "!raw_syscalls:unaugmented" 3469 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key); 3470 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY); 3471 if (err) 3472 break; 3473 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key); 3474 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY); 3475 if (err) 3476 break; 3477 } 3478 3479 /* 3480 * Now lets do a second pass looking for enabled syscalls without 3481 * an augmenter that have a signature that is a superset of another 3482 * syscall with an augmenter so that we can auto-reuse it. 3483 * 3484 * I.e. if we have an augmenter for the "open" syscall that has 3485 * this signature: 3486 * 3487 * int open(const char *pathname, int flags, mode_t mode); 3488 * 3489 * I.e. that will collect just the first string argument, then we 3490 * can reuse it for the 'creat' syscall, that has this signature: 3491 * 3492 * int creat(const char *pathname, mode_t mode); 3493 * 3494 * and for: 3495 * 3496 * int stat(const char *pathname, struct stat *statbuf); 3497 * int lstat(const char *pathname, struct stat *statbuf); 3498 * 3499 * Because the 'open' augmenter will collect the first arg as a string, 3500 * and leave alone all the other args, which already helps with 3501 * beautifying 'stat' and 'lstat''s pathname arg. 3502 * 3503 * Then, in time, when 'stat' gets an augmenter that collects both 3504 * first and second arg (this one on the raw_syscalls:sys_exit prog 3505 * array tail call, then that one will be used. 3506 */ 3507 for (int i = 0; i < trace->sctbl->syscalls.nr_entries; ++i) { 3508 int key = syscalltbl__id_at_idx(trace->sctbl, i); 3509 struct syscall *sc = trace__syscall_info(trace, NULL, key); 3510 struct bpf_program *pair_prog; 3511 int prog_fd; 3512 3513 if (sc == NULL || sc->bpf_prog.sys_enter == NULL) 3514 continue; 3515 3516 /* 3517 * For now we're just reusing the sys_enter prog, and if it 3518 * already has an augmenter, we don't need to find one. 3519 */ 3520 if (sc->bpf_prog.sys_enter != trace->skel->progs.syscall_unaugmented) 3521 continue; 3522 3523 /* 3524 * Look at all the other syscalls for one that has a signature 3525 * that is close enough that we can share: 3526 */ 3527 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc); 3528 if (pair_prog == NULL) 3529 continue; 3530 3531 sc->bpf_prog.sys_enter = pair_prog; 3532 3533 /* 3534 * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter 3535 * with the fd for the program we're reusing: 3536 */ 3537 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter); 3538 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY); 3539 if (err) 3540 break; 3541 } 3542 3543 return err; 3544 } 3545 #endif // HAVE_BPF_SKEL 3546 3547 static int trace__set_ev_qualifier_filter(struct trace *trace) 3548 { 3549 if (trace->syscalls.events.sys_enter) 3550 return trace__set_ev_qualifier_tp_filter(trace); 3551 return 0; 3552 } 3553 3554 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused, 3555 size_t npids __maybe_unused, pid_t *pids __maybe_unused) 3556 { 3557 int err = 0; 3558 #ifdef HAVE_LIBBPF_SUPPORT 3559 bool value = true; 3560 int map_fd = bpf_map__fd(map); 3561 size_t i; 3562 3563 for (i = 0; i < npids; ++i) { 3564 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY); 3565 if (err) 3566 break; 3567 } 3568 #endif 3569 return err; 3570 } 3571 3572 static int trace__set_filter_loop_pids(struct trace *trace) 3573 { 3574 unsigned int nr = 1, err; 3575 pid_t pids[32] = { 3576 getpid(), 3577 }; 3578 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]); 3579 3580 while (thread && nr < ARRAY_SIZE(pids)) { 3581 struct thread *parent = machine__find_thread(trace->host, 3582 thread__ppid(thread), 3583 thread__ppid(thread)); 3584 3585 if (parent == NULL) 3586 break; 3587 3588 if (!strcmp(thread__comm_str(parent), "sshd") || 3589 strstarts(thread__comm_str(parent), "gnome-terminal")) { 3590 pids[nr++] = thread__tid(parent); 3591 break; 3592 } 3593 thread = parent; 3594 } 3595 3596 err = evlist__append_tp_filter_pids(trace->evlist, nr, pids); 3597 if (!err && trace->filter_pids.map) 3598 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids); 3599 3600 return err; 3601 } 3602 3603 static int trace__set_filter_pids(struct trace *trace) 3604 { 3605 int err = 0; 3606 /* 3607 * Better not use !target__has_task() here because we need to cover the 3608 * case where no threads were specified in the command line, but a 3609 * workload was, and in that case we will fill in the thread_map when 3610 * we fork the workload in evlist__prepare_workload. 3611 */ 3612 if (trace->filter_pids.nr > 0) { 3613 err = evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr, 3614 trace->filter_pids.entries); 3615 if (!err && trace->filter_pids.map) { 3616 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr, 3617 trace->filter_pids.entries); 3618 } 3619 } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) { 3620 err = trace__set_filter_loop_pids(trace); 3621 } 3622 3623 return err; 3624 } 3625 3626 static int __trace__deliver_event(struct trace *trace, union perf_event *event) 3627 { 3628 struct evlist *evlist = trace->evlist; 3629 struct perf_sample sample; 3630 int err = evlist__parse_sample(evlist, event, &sample); 3631 3632 if (err) 3633 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err); 3634 else 3635 trace__handle_event(trace, event, &sample); 3636 3637 return 0; 3638 } 3639 3640 static int __trace__flush_events(struct trace *trace) 3641 { 3642 u64 first = ordered_events__first_time(&trace->oe.data); 3643 u64 flush = trace->oe.last - NSEC_PER_SEC; 3644 3645 /* Is there some thing to flush.. */ 3646 if (first && first < flush) 3647 return ordered_events__flush_time(&trace->oe.data, flush); 3648 3649 return 0; 3650 } 3651 3652 static int trace__flush_events(struct trace *trace) 3653 { 3654 return !trace->sort_events ? 0 : __trace__flush_events(trace); 3655 } 3656 3657 static int trace__deliver_event(struct trace *trace, union perf_event *event) 3658 { 3659 int err; 3660 3661 if (!trace->sort_events) 3662 return __trace__deliver_event(trace, event); 3663 3664 err = evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last); 3665 if (err && err != -1) 3666 return err; 3667 3668 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0, NULL); 3669 if (err) 3670 return err; 3671 3672 return trace__flush_events(trace); 3673 } 3674 3675 static int ordered_events__deliver_event(struct ordered_events *oe, 3676 struct ordered_event *event) 3677 { 3678 struct trace *trace = container_of(oe, struct trace, oe.data); 3679 3680 return __trace__deliver_event(trace, event->event); 3681 } 3682 3683 static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg) 3684 { 3685 struct tep_format_field *field; 3686 struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel); 3687 3688 if (evsel->tp_format == NULL || fmt == NULL) 3689 return NULL; 3690 3691 for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt) 3692 if (strcmp(field->name, arg) == 0) 3693 return fmt; 3694 3695 return NULL; 3696 } 3697 3698 static int trace__expand_filter(struct trace *trace __maybe_unused, struct evsel *evsel) 3699 { 3700 char *tok, *left = evsel->filter, *new_filter = evsel->filter; 3701 3702 while ((tok = strpbrk(left, "=<>!")) != NULL) { 3703 char *right = tok + 1, *right_end; 3704 3705 if (*right == '=') 3706 ++right; 3707 3708 while (isspace(*right)) 3709 ++right; 3710 3711 if (*right == '\0') 3712 break; 3713 3714 while (!isalpha(*left)) 3715 if (++left == tok) { 3716 /* 3717 * Bail out, can't find the name of the argument that is being 3718 * used in the filter, let it try to set this filter, will fail later. 3719 */ 3720 return 0; 3721 } 3722 3723 right_end = right + 1; 3724 while (isalnum(*right_end) || *right_end == '_' || *right_end == '|') 3725 ++right_end; 3726 3727 if (isalpha(*right)) { 3728 struct syscall_arg_fmt *fmt; 3729 int left_size = tok - left, 3730 right_size = right_end - right; 3731 char arg[128]; 3732 3733 while (isspace(left[left_size - 1])) 3734 --left_size; 3735 3736 scnprintf(arg, sizeof(arg), "%.*s", left_size, left); 3737 3738 fmt = evsel__find_syscall_arg_fmt_by_name(evsel, arg); 3739 if (fmt == NULL) { 3740 pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n", 3741 arg, evsel->name, evsel->filter); 3742 return -1; 3743 } 3744 3745 pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ", 3746 arg, (int)(right - tok), tok, right_size, right); 3747 3748 if (fmt->strtoul) { 3749 u64 val; 3750 struct syscall_arg syscall_arg = { 3751 .parm = fmt->parm, 3752 }; 3753 3754 if (fmt->strtoul(right, right_size, &syscall_arg, &val)) { 3755 char *n, expansion[19]; 3756 int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val); 3757 int expansion_offset = right - new_filter; 3758 3759 pr_debug("%s", expansion); 3760 3761 if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) { 3762 pr_debug(" out of memory!\n"); 3763 free(new_filter); 3764 return -1; 3765 } 3766 if (new_filter != evsel->filter) 3767 free(new_filter); 3768 left = n + expansion_offset + expansion_lenght; 3769 new_filter = n; 3770 } else { 3771 pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n", 3772 right_size, right, arg, evsel->name, evsel->filter); 3773 return -1; 3774 } 3775 } else { 3776 pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n", 3777 arg, evsel->name, evsel->filter); 3778 return -1; 3779 } 3780 3781 pr_debug("\n"); 3782 } else { 3783 left = right_end; 3784 } 3785 } 3786 3787 if (new_filter != evsel->filter) { 3788 pr_debug("New filter for %s: %s\n", evsel->name, new_filter); 3789 evsel__set_filter(evsel, new_filter); 3790 free(new_filter); 3791 } 3792 3793 return 0; 3794 } 3795 3796 static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel) 3797 { 3798 struct evlist *evlist = trace->evlist; 3799 struct evsel *evsel; 3800 3801 evlist__for_each_entry(evlist, evsel) { 3802 if (evsel->filter == NULL) 3803 continue; 3804 3805 if (trace__expand_filter(trace, evsel)) { 3806 *err_evsel = evsel; 3807 return -1; 3808 } 3809 } 3810 3811 return 0; 3812 } 3813 3814 static int trace__run(struct trace *trace, int argc, const char **argv) 3815 { 3816 struct evlist *evlist = trace->evlist; 3817 struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL; 3818 int err = -1, i; 3819 unsigned long before; 3820 const bool forks = argc > 0; 3821 bool draining = false; 3822 3823 trace->live = true; 3824 3825 if (!trace->raw_augmented_syscalls) { 3826 if (trace->trace_syscalls && trace__add_syscall_newtp(trace)) 3827 goto out_error_raw_syscalls; 3828 3829 if (trace->trace_syscalls) 3830 trace->vfs_getname = evlist__add_vfs_getname(evlist); 3831 } 3832 3833 if ((trace->trace_pgfaults & TRACE_PFMAJ)) { 3834 pgfault_maj = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ); 3835 if (pgfault_maj == NULL) 3836 goto out_error_mem; 3837 evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param); 3838 evlist__add(evlist, pgfault_maj); 3839 } 3840 3841 if ((trace->trace_pgfaults & TRACE_PFMIN)) { 3842 pgfault_min = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN); 3843 if (pgfault_min == NULL) 3844 goto out_error_mem; 3845 evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param); 3846 evlist__add(evlist, pgfault_min); 3847 } 3848 3849 /* Enable ignoring missing threads when -u/-p option is defined. */ 3850 trace->opts.ignore_missing_thread = trace->opts.target.uid != UINT_MAX || trace->opts.target.pid; 3851 3852 if (trace->sched && 3853 evlist__add_newtp(evlist, "sched", "sched_stat_runtime", trace__sched_stat_runtime)) 3854 goto out_error_sched_stat_runtime; 3855 /* 3856 * If a global cgroup was set, apply it to all the events without an 3857 * explicit cgroup. I.e.: 3858 * 3859 * trace -G A -e sched:*switch 3860 * 3861 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc 3862 * _and_ sched:sched_switch to the 'A' cgroup, while: 3863 * 3864 * trace -e sched:*switch -G A 3865 * 3866 * will only set the sched:sched_switch event to the 'A' cgroup, all the 3867 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without" 3868 * a cgroup (on the root cgroup, sys wide, etc). 3869 * 3870 * Multiple cgroups: 3871 * 3872 * trace -G A -e sched:*switch -G B 3873 * 3874 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes 3875 * to the 'B' cgroup. 3876 * 3877 * evlist__set_default_cgroup() grabs a reference of the passed cgroup 3878 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL. 3879 */ 3880 if (trace->cgroup) 3881 evlist__set_default_cgroup(trace->evlist, trace->cgroup); 3882 3883 err = evlist__create_maps(evlist, &trace->opts.target); 3884 if (err < 0) { 3885 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n"); 3886 goto out_delete_evlist; 3887 } 3888 3889 err = trace__symbols_init(trace, evlist); 3890 if (err < 0) { 3891 fprintf(trace->output, "Problems initializing symbol libraries!\n"); 3892 goto out_delete_evlist; 3893 } 3894 3895 evlist__config(evlist, &trace->opts, &callchain_param); 3896 3897 if (forks) { 3898 err = evlist__prepare_workload(evlist, &trace->opts.target, argv, false, NULL); 3899 if (err < 0) { 3900 fprintf(trace->output, "Couldn't run the workload!\n"); 3901 goto out_delete_evlist; 3902 } 3903 workload_pid = evlist->workload.pid; 3904 } 3905 3906 err = evlist__open(evlist); 3907 if (err < 0) 3908 goto out_error_open; 3909 #ifdef HAVE_BPF_SKEL 3910 if (trace->syscalls.events.bpf_output) { 3911 struct perf_cpu cpu; 3912 3913 /* 3914 * Set up the __augmented_syscalls__ BPF map to hold for each 3915 * CPU the bpf-output event's file descriptor. 3916 */ 3917 perf_cpu_map__for_each_cpu(cpu, i, trace->syscalls.events.bpf_output->core.cpus) { 3918 bpf_map__update_elem(trace->skel->maps.__augmented_syscalls__, 3919 &cpu.cpu, sizeof(int), 3920 xyarray__entry(trace->syscalls.events.bpf_output->core.fd, 3921 cpu.cpu, 0), 3922 sizeof(__u32), BPF_ANY); 3923 } 3924 } 3925 #endif 3926 err = trace__set_filter_pids(trace); 3927 if (err < 0) 3928 goto out_error_mem; 3929 3930 #ifdef HAVE_BPF_SKEL 3931 if (trace->skel && trace->skel->progs.sys_enter) 3932 trace__init_syscalls_bpf_prog_array_maps(trace); 3933 #endif 3934 3935 if (trace->ev_qualifier_ids.nr > 0) { 3936 err = trace__set_ev_qualifier_filter(trace); 3937 if (err < 0) 3938 goto out_errno; 3939 3940 if (trace->syscalls.events.sys_exit) { 3941 pr_debug("event qualifier tracepoint filter: %s\n", 3942 trace->syscalls.events.sys_exit->filter); 3943 } 3944 } 3945 3946 /* 3947 * If the "close" syscall is not traced, then we will not have the 3948 * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the 3949 * fd->pathname table and were ending up showing the last value set by 3950 * syscalls opening a pathname and associating it with a descriptor or 3951 * reading it from /proc/pid/fd/ in cases where that doesn't make 3952 * sense. 3953 * 3954 * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is 3955 * not in use. 3956 */ 3957 trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close")); 3958 3959 err = trace__expand_filters(trace, &evsel); 3960 if (err) 3961 goto out_delete_evlist; 3962 err = evlist__apply_filters(evlist, &evsel); 3963 if (err < 0) 3964 goto out_error_apply_filters; 3965 3966 err = evlist__mmap(evlist, trace->opts.mmap_pages); 3967 if (err < 0) 3968 goto out_error_mmap; 3969 3970 if (!target__none(&trace->opts.target) && !trace->opts.target.initial_delay) 3971 evlist__enable(evlist); 3972 3973 if (forks) 3974 evlist__start_workload(evlist); 3975 3976 if (trace->opts.target.initial_delay) { 3977 usleep(trace->opts.target.initial_delay * 1000); 3978 evlist__enable(evlist); 3979 } 3980 3981 trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 || 3982 perf_thread_map__nr(evlist->core.threads) > 1 || 3983 evlist__first(evlist)->core.attr.inherit; 3984 3985 /* 3986 * Now that we already used evsel->core.attr to ask the kernel to setup the 3987 * events, lets reuse evsel->core.attr.sample_max_stack as the limit in 3988 * trace__resolve_callchain(), allowing per-event max-stack settings 3989 * to override an explicitly set --max-stack global setting. 3990 */ 3991 evlist__for_each_entry(evlist, evsel) { 3992 if (evsel__has_callchain(evsel) && 3993 evsel->core.attr.sample_max_stack == 0) 3994 evsel->core.attr.sample_max_stack = trace->max_stack; 3995 } 3996 again: 3997 before = trace->nr_events; 3998 3999 for (i = 0; i < evlist->core.nr_mmaps; i++) { 4000 union perf_event *event; 4001 struct mmap *md; 4002 4003 md = &evlist->mmap[i]; 4004 if (perf_mmap__read_init(&md->core) < 0) 4005 continue; 4006 4007 while ((event = perf_mmap__read_event(&md->core)) != NULL) { 4008 ++trace->nr_events; 4009 4010 err = trace__deliver_event(trace, event); 4011 if (err) 4012 goto out_disable; 4013 4014 perf_mmap__consume(&md->core); 4015 4016 if (interrupted) 4017 goto out_disable; 4018 4019 if (done && !draining) { 4020 evlist__disable(evlist); 4021 draining = true; 4022 } 4023 } 4024 perf_mmap__read_done(&md->core); 4025 } 4026 4027 if (trace->nr_events == before) { 4028 int timeout = done ? 100 : -1; 4029 4030 if (!draining && evlist__poll(evlist, timeout) > 0) { 4031 if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0) 4032 draining = true; 4033 4034 goto again; 4035 } else { 4036 if (trace__flush_events(trace)) 4037 goto out_disable; 4038 } 4039 } else { 4040 goto again; 4041 } 4042 4043 out_disable: 4044 thread__zput(trace->current); 4045 4046 evlist__disable(evlist); 4047 4048 if (trace->sort_events) 4049 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL); 4050 4051 if (!err) { 4052 if (trace->summary) 4053 trace__fprintf_thread_summary(trace, trace->output); 4054 4055 if (trace->show_tool_stats) { 4056 fprintf(trace->output, "Stats:\n " 4057 " vfs_getname : %" PRIu64 "\n" 4058 " proc_getname: %" PRIu64 "\n", 4059 trace->stats.vfs_getname, 4060 trace->stats.proc_getname); 4061 } 4062 } 4063 4064 out_delete_evlist: 4065 trace__symbols__exit(trace); 4066 evlist__free_syscall_tp_fields(evlist); 4067 evlist__delete(evlist); 4068 cgroup__put(trace->cgroup); 4069 trace->evlist = NULL; 4070 trace->live = false; 4071 return err; 4072 { 4073 char errbuf[BUFSIZ]; 4074 4075 out_error_sched_stat_runtime: 4076 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime"); 4077 goto out_error; 4078 4079 out_error_raw_syscalls: 4080 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)"); 4081 goto out_error; 4082 4083 out_error_mmap: 4084 evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf)); 4085 goto out_error; 4086 4087 out_error_open: 4088 evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf)); 4089 4090 out_error: 4091 fprintf(trace->output, "%s\n", errbuf); 4092 goto out_delete_evlist; 4093 4094 out_error_apply_filters: 4095 fprintf(trace->output, 4096 "Failed to set filter \"%s\" on event %s with %d (%s)\n", 4097 evsel->filter, evsel__name(evsel), errno, 4098 str_error_r(errno, errbuf, sizeof(errbuf))); 4099 goto out_delete_evlist; 4100 } 4101 out_error_mem: 4102 fprintf(trace->output, "Not enough memory to run!\n"); 4103 goto out_delete_evlist; 4104 4105 out_errno: 4106 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno)); 4107 goto out_delete_evlist; 4108 } 4109 4110 static int trace__replay(struct trace *trace) 4111 { 4112 const struct evsel_str_handler handlers[] = { 4113 { "probe:vfs_getname", trace__vfs_getname, }, 4114 }; 4115 struct perf_data data = { 4116 .path = input_name, 4117 .mode = PERF_DATA_MODE_READ, 4118 .force = trace->force, 4119 }; 4120 struct perf_session *session; 4121 struct evsel *evsel; 4122 int err = -1; 4123 4124 trace->tool.sample = trace__process_sample; 4125 trace->tool.mmap = perf_event__process_mmap; 4126 trace->tool.mmap2 = perf_event__process_mmap2; 4127 trace->tool.comm = perf_event__process_comm; 4128 trace->tool.exit = perf_event__process_exit; 4129 trace->tool.fork = perf_event__process_fork; 4130 trace->tool.attr = perf_event__process_attr; 4131 trace->tool.tracing_data = perf_event__process_tracing_data; 4132 trace->tool.build_id = perf_event__process_build_id; 4133 trace->tool.namespaces = perf_event__process_namespaces; 4134 4135 trace->tool.ordered_events = true; 4136 trace->tool.ordering_requires_timestamps = true; 4137 4138 /* add tid to output */ 4139 trace->multiple_threads = true; 4140 4141 session = perf_session__new(&data, &trace->tool); 4142 if (IS_ERR(session)) 4143 return PTR_ERR(session); 4144 4145 if (trace->opts.target.pid) 4146 symbol_conf.pid_list_str = strdup(trace->opts.target.pid); 4147 4148 if (trace->opts.target.tid) 4149 symbol_conf.tid_list_str = strdup(trace->opts.target.tid); 4150 4151 if (symbol__init(&session->header.env) < 0) 4152 goto out; 4153 4154 trace->host = &session->machines.host; 4155 4156 err = perf_session__set_tracepoints_handlers(session, handlers); 4157 if (err) 4158 goto out; 4159 4160 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_enter"); 4161 trace->syscalls.events.sys_enter = evsel; 4162 /* older kernels have syscalls tp versus raw_syscalls */ 4163 if (evsel == NULL) 4164 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_enter"); 4165 4166 if (evsel && 4167 (evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 || 4168 perf_evsel__init_sc_tp_ptr_field(evsel, args))) { 4169 pr_err("Error during initialize raw_syscalls:sys_enter event\n"); 4170 goto out; 4171 } 4172 4173 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_exit"); 4174 trace->syscalls.events.sys_exit = evsel; 4175 if (evsel == NULL) 4176 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_exit"); 4177 if (evsel && 4178 (evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 || 4179 perf_evsel__init_sc_tp_uint_field(evsel, ret))) { 4180 pr_err("Error during initialize raw_syscalls:sys_exit event\n"); 4181 goto out; 4182 } 4183 4184 evlist__for_each_entry(session->evlist, evsel) { 4185 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE && 4186 (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ || 4187 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN || 4188 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS)) 4189 evsel->handler = trace__pgfault; 4190 } 4191 4192 setup_pager(); 4193 4194 err = perf_session__process_events(session); 4195 if (err) 4196 pr_err("Failed to process events, error %d", err); 4197 4198 else if (trace->summary) 4199 trace__fprintf_thread_summary(trace, trace->output); 4200 4201 out: 4202 perf_session__delete(session); 4203 4204 return err; 4205 } 4206 4207 static size_t trace__fprintf_threads_header(FILE *fp) 4208 { 4209 size_t printed; 4210 4211 printed = fprintf(fp, "\n Summary of events:\n\n"); 4212 4213 return printed; 4214 } 4215 4216 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs, 4217 struct syscall_stats *stats; 4218 double msecs; 4219 int syscall; 4220 ) 4221 { 4222 struct int_node *source = rb_entry(nd, struct int_node, rb_node); 4223 struct syscall_stats *stats = source->priv; 4224 4225 entry->syscall = source->i; 4226 entry->stats = stats; 4227 entry->msecs = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0; 4228 } 4229 4230 static size_t thread__dump_stats(struct thread_trace *ttrace, 4231 struct trace *trace, FILE *fp) 4232 { 4233 size_t printed = 0; 4234 struct syscall *sc; 4235 struct rb_node *nd; 4236 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats); 4237 4238 if (syscall_stats == NULL) 4239 return 0; 4240 4241 printed += fprintf(fp, "\n"); 4242 4243 printed += fprintf(fp, " syscall calls errors total min avg max stddev\n"); 4244 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n"); 4245 printed += fprintf(fp, " --------------- -------- ------ -------- --------- --------- --------- ------\n"); 4246 4247 resort_rb__for_each_entry(nd, syscall_stats) { 4248 struct syscall_stats *stats = syscall_stats_entry->stats; 4249 if (stats) { 4250 double min = (double)(stats->stats.min) / NSEC_PER_MSEC; 4251 double max = (double)(stats->stats.max) / NSEC_PER_MSEC; 4252 double avg = avg_stats(&stats->stats); 4253 double pct; 4254 u64 n = (u64)stats->stats.n; 4255 4256 pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0; 4257 avg /= NSEC_PER_MSEC; 4258 4259 sc = &trace->syscalls.table[syscall_stats_entry->syscall]; 4260 printed += fprintf(fp, " %-15s", sc->name); 4261 printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f", 4262 n, stats->nr_failures, syscall_stats_entry->msecs, min, avg); 4263 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct); 4264 4265 if (trace->errno_summary && stats->nr_failures) { 4266 int e; 4267 4268 for (e = 0; e < stats->max_errno; ++e) { 4269 if (stats->errnos[e] != 0) 4270 fprintf(fp, "\t\t\t\t%s: %d\n", perf_env__arch_strerrno(trace->host->env, e + 1), stats->errnos[e]); 4271 } 4272 } 4273 } 4274 } 4275 4276 resort_rb__delete(syscall_stats); 4277 printed += fprintf(fp, "\n\n"); 4278 4279 return printed; 4280 } 4281 4282 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace) 4283 { 4284 size_t printed = 0; 4285 struct thread_trace *ttrace = thread__priv(thread); 4286 double ratio; 4287 4288 if (ttrace == NULL) 4289 return 0; 4290 4291 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0; 4292 4293 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread__tid(thread)); 4294 printed += fprintf(fp, "%lu events, ", ttrace->nr_events); 4295 printed += fprintf(fp, "%.1f%%", ratio); 4296 if (ttrace->pfmaj) 4297 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj); 4298 if (ttrace->pfmin) 4299 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin); 4300 if (trace->sched) 4301 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms); 4302 else if (fputc('\n', fp) != EOF) 4303 ++printed; 4304 4305 printed += thread__dump_stats(ttrace, trace, fp); 4306 4307 return printed; 4308 } 4309 4310 static unsigned long thread__nr_events(struct thread_trace *ttrace) 4311 { 4312 return ttrace ? ttrace->nr_events : 0; 4313 } 4314 4315 static int trace_nr_events_cmp(void *priv __maybe_unused, 4316 const struct list_head *la, 4317 const struct list_head *lb) 4318 { 4319 struct thread_list *a = list_entry(la, struct thread_list, list); 4320 struct thread_list *b = list_entry(lb, struct thread_list, list); 4321 unsigned long a_nr_events = thread__nr_events(thread__priv(a->thread)); 4322 unsigned long b_nr_events = thread__nr_events(thread__priv(b->thread)); 4323 4324 if (a_nr_events != b_nr_events) 4325 return a_nr_events < b_nr_events ? -1 : 1; 4326 4327 /* Identical number of threads, place smaller tids first. */ 4328 return thread__tid(a->thread) < thread__tid(b->thread) 4329 ? -1 4330 : (thread__tid(a->thread) > thread__tid(b->thread) ? 1 : 0); 4331 } 4332 4333 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp) 4334 { 4335 size_t printed = trace__fprintf_threads_header(fp); 4336 LIST_HEAD(threads); 4337 4338 if (machine__thread_list(trace->host, &threads) == 0) { 4339 struct thread_list *pos; 4340 4341 list_sort(NULL, &threads, trace_nr_events_cmp); 4342 4343 list_for_each_entry(pos, &threads, list) 4344 printed += trace__fprintf_thread(fp, pos->thread, trace); 4345 } 4346 thread_list__delete(&threads); 4347 return printed; 4348 } 4349 4350 static int trace__set_duration(const struct option *opt, const char *str, 4351 int unset __maybe_unused) 4352 { 4353 struct trace *trace = opt->value; 4354 4355 trace->duration_filter = atof(str); 4356 return 0; 4357 } 4358 4359 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str, 4360 int unset __maybe_unused) 4361 { 4362 int ret = -1; 4363 size_t i; 4364 struct trace *trace = opt->value; 4365 /* 4366 * FIXME: introduce a intarray class, plain parse csv and create a 4367 * { int nr, int entries[] } struct... 4368 */ 4369 struct intlist *list = intlist__new(str); 4370 4371 if (list == NULL) 4372 return -1; 4373 4374 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1; 4375 trace->filter_pids.entries = calloc(i, sizeof(pid_t)); 4376 4377 if (trace->filter_pids.entries == NULL) 4378 goto out; 4379 4380 trace->filter_pids.entries[0] = getpid(); 4381 4382 for (i = 1; i < trace->filter_pids.nr; ++i) 4383 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i; 4384 4385 intlist__delete(list); 4386 ret = 0; 4387 out: 4388 return ret; 4389 } 4390 4391 static int trace__open_output(struct trace *trace, const char *filename) 4392 { 4393 struct stat st; 4394 4395 if (!stat(filename, &st) && st.st_size) { 4396 char oldname[PATH_MAX]; 4397 4398 scnprintf(oldname, sizeof(oldname), "%s.old", filename); 4399 unlink(oldname); 4400 rename(filename, oldname); 4401 } 4402 4403 trace->output = fopen(filename, "w"); 4404 4405 return trace->output == NULL ? -errno : 0; 4406 } 4407 4408 static int parse_pagefaults(const struct option *opt, const char *str, 4409 int unset __maybe_unused) 4410 { 4411 int *trace_pgfaults = opt->value; 4412 4413 if (strcmp(str, "all") == 0) 4414 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN; 4415 else if (strcmp(str, "maj") == 0) 4416 *trace_pgfaults |= TRACE_PFMAJ; 4417 else if (strcmp(str, "min") == 0) 4418 *trace_pgfaults |= TRACE_PFMIN; 4419 else 4420 return -1; 4421 4422 return 0; 4423 } 4424 4425 static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler) 4426 { 4427 struct evsel *evsel; 4428 4429 evlist__for_each_entry(evlist, evsel) { 4430 if (evsel->handler == NULL) 4431 evsel->handler = handler; 4432 } 4433 } 4434 4435 static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name) 4436 { 4437 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel); 4438 4439 if (fmt) { 4440 const struct syscall_fmt *scfmt = syscall_fmt__find(name); 4441 4442 if (scfmt) { 4443 int skip = 0; 4444 4445 if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 || 4446 strcmp(evsel->tp_format->format.fields->name, "nr") == 0) 4447 ++skip; 4448 4449 memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt)); 4450 } 4451 } 4452 } 4453 4454 static int evlist__set_syscall_tp_fields(struct evlist *evlist) 4455 { 4456 struct evsel *evsel; 4457 4458 evlist__for_each_entry(evlist, evsel) { 4459 if (evsel->priv || !evsel->tp_format) 4460 continue; 4461 4462 if (strcmp(evsel->tp_format->system, "syscalls")) { 4463 evsel__init_tp_arg_scnprintf(evsel); 4464 continue; 4465 } 4466 4467 if (evsel__init_syscall_tp(evsel)) 4468 return -1; 4469 4470 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) { 4471 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 4472 4473 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64))) 4474 return -1; 4475 4476 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1); 4477 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) { 4478 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 4479 4480 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap)) 4481 return -1; 4482 4483 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1); 4484 } 4485 } 4486 4487 return 0; 4488 } 4489 4490 /* 4491 * XXX: Hackish, just splitting the combined -e+--event (syscalls 4492 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use 4493 * existing facilities unchanged (trace->ev_qualifier + parse_options()). 4494 * 4495 * It'd be better to introduce a parse_options() variant that would return a 4496 * list with the terms it didn't match to an event... 4497 */ 4498 static int trace__parse_events_option(const struct option *opt, const char *str, 4499 int unset __maybe_unused) 4500 { 4501 struct trace *trace = (struct trace *)opt->value; 4502 const char *s = str; 4503 char *sep = NULL, *lists[2] = { NULL, NULL, }; 4504 int len = strlen(str) + 1, err = -1, list, idx; 4505 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR); 4506 char group_name[PATH_MAX]; 4507 const struct syscall_fmt *fmt; 4508 4509 if (strace_groups_dir == NULL) 4510 return -1; 4511 4512 if (*s == '!') { 4513 ++s; 4514 trace->not_ev_qualifier = true; 4515 } 4516 4517 while (1) { 4518 if ((sep = strchr(s, ',')) != NULL) 4519 *sep = '\0'; 4520 4521 list = 0; 4522 if (syscalltbl__id(trace->sctbl, s) >= 0 || 4523 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) { 4524 list = 1; 4525 goto do_concat; 4526 } 4527 4528 fmt = syscall_fmt__find_by_alias(s); 4529 if (fmt != NULL) { 4530 list = 1; 4531 s = fmt->name; 4532 } else { 4533 path__join(group_name, sizeof(group_name), strace_groups_dir, s); 4534 if (access(group_name, R_OK) == 0) 4535 list = 1; 4536 } 4537 do_concat: 4538 if (lists[list]) { 4539 sprintf(lists[list] + strlen(lists[list]), ",%s", s); 4540 } else { 4541 lists[list] = malloc(len); 4542 if (lists[list] == NULL) 4543 goto out; 4544 strcpy(lists[list], s); 4545 } 4546 4547 if (!sep) 4548 break; 4549 4550 *sep = ','; 4551 s = sep + 1; 4552 } 4553 4554 if (lists[1] != NULL) { 4555 struct strlist_config slist_config = { 4556 .dirname = strace_groups_dir, 4557 }; 4558 4559 trace->ev_qualifier = strlist__new(lists[1], &slist_config); 4560 if (trace->ev_qualifier == NULL) { 4561 fputs("Not enough memory to parse event qualifier", trace->output); 4562 goto out; 4563 } 4564 4565 if (trace__validate_ev_qualifier(trace)) 4566 goto out; 4567 trace->trace_syscalls = true; 4568 } 4569 4570 err = 0; 4571 4572 if (lists[0]) { 4573 struct parse_events_option_args parse_events_option_args = { 4574 .evlistp = &trace->evlist, 4575 }; 4576 struct option o = { 4577 .value = &parse_events_option_args, 4578 }; 4579 err = parse_events_option(&o, lists[0], 0); 4580 } 4581 out: 4582 free(strace_groups_dir); 4583 free(lists[0]); 4584 free(lists[1]); 4585 if (sep) 4586 *sep = ','; 4587 4588 return err; 4589 } 4590 4591 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset) 4592 { 4593 struct trace *trace = opt->value; 4594 4595 if (!list_empty(&trace->evlist->core.entries)) { 4596 struct option o = { 4597 .value = &trace->evlist, 4598 }; 4599 return parse_cgroups(&o, str, unset); 4600 } 4601 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str); 4602 4603 return 0; 4604 } 4605 4606 static int trace__config(const char *var, const char *value, void *arg) 4607 { 4608 struct trace *trace = arg; 4609 int err = 0; 4610 4611 if (!strcmp(var, "trace.add_events")) { 4612 trace->perfconfig_events = strdup(value); 4613 if (trace->perfconfig_events == NULL) { 4614 pr_err("Not enough memory for %s\n", "trace.add_events"); 4615 return -1; 4616 } 4617 } else if (!strcmp(var, "trace.show_timestamp")) { 4618 trace->show_tstamp = perf_config_bool(var, value); 4619 } else if (!strcmp(var, "trace.show_duration")) { 4620 trace->show_duration = perf_config_bool(var, value); 4621 } else if (!strcmp(var, "trace.show_arg_names")) { 4622 trace->show_arg_names = perf_config_bool(var, value); 4623 if (!trace->show_arg_names) 4624 trace->show_zeros = true; 4625 } else if (!strcmp(var, "trace.show_zeros")) { 4626 bool new_show_zeros = perf_config_bool(var, value); 4627 if (!trace->show_arg_names && !new_show_zeros) { 4628 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n"); 4629 goto out; 4630 } 4631 trace->show_zeros = new_show_zeros; 4632 } else if (!strcmp(var, "trace.show_prefix")) { 4633 trace->show_string_prefix = perf_config_bool(var, value); 4634 } else if (!strcmp(var, "trace.no_inherit")) { 4635 trace->opts.no_inherit = perf_config_bool(var, value); 4636 } else if (!strcmp(var, "trace.args_alignment")) { 4637 int args_alignment = 0; 4638 if (perf_config_int(&args_alignment, var, value) == 0) 4639 trace->args_alignment = args_alignment; 4640 } else if (!strcmp(var, "trace.tracepoint_beautifiers")) { 4641 if (strcasecmp(value, "libtraceevent") == 0) 4642 trace->libtraceevent_print = true; 4643 else if (strcasecmp(value, "libbeauty") == 0) 4644 trace->libtraceevent_print = false; 4645 } 4646 out: 4647 return err; 4648 } 4649 4650 static void trace__exit(struct trace *trace) 4651 { 4652 int i; 4653 4654 strlist__delete(trace->ev_qualifier); 4655 zfree(&trace->ev_qualifier_ids.entries); 4656 if (trace->syscalls.table) { 4657 for (i = 0; i <= trace->sctbl->syscalls.max_id; i++) 4658 syscall__exit(&trace->syscalls.table[i]); 4659 zfree(&trace->syscalls.table); 4660 } 4661 syscalltbl__delete(trace->sctbl); 4662 zfree(&trace->perfconfig_events); 4663 } 4664 4665 #ifdef HAVE_BPF_SKEL 4666 static int bpf__setup_bpf_output(struct evlist *evlist) 4667 { 4668 int err = parse_event(evlist, "bpf-output/no-inherit=1,name=__augmented_syscalls__/"); 4669 4670 if (err) 4671 pr_debug("ERROR: failed to create the \"__augmented_syscalls__\" bpf-output event\n"); 4672 4673 return err; 4674 } 4675 #endif 4676 4677 int cmd_trace(int argc, const char **argv) 4678 { 4679 const char *trace_usage[] = { 4680 "perf trace [<options>] [<command>]", 4681 "perf trace [<options>] -- <command> [<options>]", 4682 "perf trace record [<options>] [<command>]", 4683 "perf trace record [<options>] -- <command> [<options>]", 4684 NULL 4685 }; 4686 struct trace trace = { 4687 .opts = { 4688 .target = { 4689 .uid = UINT_MAX, 4690 .uses_mmap = true, 4691 }, 4692 .user_freq = UINT_MAX, 4693 .user_interval = ULLONG_MAX, 4694 .no_buffering = true, 4695 .mmap_pages = UINT_MAX, 4696 }, 4697 .output = stderr, 4698 .show_comm = true, 4699 .show_tstamp = true, 4700 .show_duration = true, 4701 .show_arg_names = true, 4702 .args_alignment = 70, 4703 .trace_syscalls = false, 4704 .kernel_syscallchains = false, 4705 .max_stack = UINT_MAX, 4706 .max_events = ULONG_MAX, 4707 }; 4708 const char *output_name = NULL; 4709 const struct option trace_options[] = { 4710 OPT_CALLBACK('e', "event", &trace, "event", 4711 "event/syscall selector. use 'perf list' to list available events", 4712 trace__parse_events_option), 4713 OPT_CALLBACK(0, "filter", &trace.evlist, "filter", 4714 "event filter", parse_filter), 4715 OPT_BOOLEAN(0, "comm", &trace.show_comm, 4716 "show the thread COMM next to its id"), 4717 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"), 4718 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace", 4719 trace__parse_events_option), 4720 OPT_STRING('o', "output", &output_name, "file", "output file name"), 4721 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"), 4722 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid", 4723 "trace events on existing process id"), 4724 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid", 4725 "trace events on existing thread id"), 4726 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids", 4727 "pids to filter (by the kernel)", trace__set_filter_pids_from_option), 4728 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide, 4729 "system-wide collection from all CPUs"), 4730 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu", 4731 "list of cpus to monitor"), 4732 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit, 4733 "child tasks do not inherit counters"), 4734 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages", 4735 "number of mmap data pages", evlist__parse_mmap_pages), 4736 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user", 4737 "user to profile"), 4738 OPT_CALLBACK(0, "duration", &trace, "float", 4739 "show only events with duration > N.M ms", 4740 trace__set_duration), 4741 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"), 4742 OPT_INCR('v', "verbose", &verbose, "be more verbose"), 4743 OPT_BOOLEAN('T', "time", &trace.full_time, 4744 "Show full timestamp, not time relative to first start"), 4745 OPT_BOOLEAN(0, "failure", &trace.failure_only, 4746 "Show only syscalls that failed"), 4747 OPT_BOOLEAN('s', "summary", &trace.summary_only, 4748 "Show only syscall summary with statistics"), 4749 OPT_BOOLEAN('S', "with-summary", &trace.summary, 4750 "Show all syscalls and summary with statistics"), 4751 OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary, 4752 "Show errno stats per syscall, use with -s or -S"), 4753 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min", 4754 "Trace pagefaults", parse_pagefaults, "maj"), 4755 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"), 4756 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"), 4757 OPT_CALLBACK(0, "call-graph", &trace.opts, 4758 "record_mode[,record_size]", record_callchain_help, 4759 &record_parse_callchain_opt), 4760 OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print, 4761 "Use libtraceevent to print the tracepoint arguments."), 4762 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains, 4763 "Show the kernel callchains on the syscall exit path"), 4764 OPT_ULONG(0, "max-events", &trace.max_events, 4765 "Set the maximum number of events to print, exit after that is reached. "), 4766 OPT_UINTEGER(0, "min-stack", &trace.min_stack, 4767 "Set the minimum stack depth when parsing the callchain, " 4768 "anything below the specified depth will be ignored."), 4769 OPT_UINTEGER(0, "max-stack", &trace.max_stack, 4770 "Set the maximum stack depth when parsing the callchain, " 4771 "anything beyond the specified depth will be ignored. " 4772 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)), 4773 OPT_BOOLEAN(0, "sort-events", &trace.sort_events, 4774 "Sort batch of events before processing, use if getting out of order events"), 4775 OPT_BOOLEAN(0, "print-sample", &trace.print_sample, 4776 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"), 4777 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, 4778 "per thread proc mmap processing timeout in ms"), 4779 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only", 4780 trace__parse_cgroups), 4781 OPT_INTEGER('D', "delay", &trace.opts.target.initial_delay, 4782 "ms to wait before starting measurement after program " 4783 "start"), 4784 OPTS_EVSWITCH(&trace.evswitch), 4785 OPT_END() 4786 }; 4787 bool __maybe_unused max_stack_user_set = true; 4788 bool mmap_pages_user_set = true; 4789 struct evsel *evsel; 4790 const char * const trace_subcommands[] = { "record", NULL }; 4791 int err = -1; 4792 char bf[BUFSIZ]; 4793 struct sigaction sigchld_act; 4794 4795 signal(SIGSEGV, sighandler_dump_stack); 4796 signal(SIGFPE, sighandler_dump_stack); 4797 signal(SIGINT, sighandler_interrupt); 4798 4799 memset(&sigchld_act, 0, sizeof(sigchld_act)); 4800 sigchld_act.sa_flags = SA_SIGINFO; 4801 sigchld_act.sa_sigaction = sighandler_chld; 4802 sigaction(SIGCHLD, &sigchld_act, NULL); 4803 4804 trace.evlist = evlist__new(); 4805 trace.sctbl = syscalltbl__new(); 4806 4807 if (trace.evlist == NULL || trace.sctbl == NULL) { 4808 pr_err("Not enough memory to run!\n"); 4809 err = -ENOMEM; 4810 goto out; 4811 } 4812 4813 /* 4814 * Parsing .perfconfig may entail creating a BPF event, that may need 4815 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting 4816 * is too small. This affects just this process, not touching the 4817 * global setting. If it fails we'll get something in 'perf trace -v' 4818 * to help diagnose the problem. 4819 */ 4820 rlimit__bump_memlock(); 4821 4822 err = perf_config(trace__config, &trace); 4823 if (err) 4824 goto out; 4825 4826 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands, 4827 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION); 4828 4829 /* 4830 * Here we already passed thru trace__parse_events_option() and it has 4831 * already figured out if -e syscall_name, if not but if --event 4832 * foo:bar was used, the user is interested _just_ in those, say, 4833 * tracepoint events, not in the strace-like syscall-name-based mode. 4834 * 4835 * This is important because we need to check if strace-like mode is 4836 * needed to decided if we should filter out the eBPF 4837 * __augmented_syscalls__ code, if it is in the mix, say, via 4838 * .perfconfig trace.add_events, and filter those out. 4839 */ 4840 if (!trace.trace_syscalls && !trace.trace_pgfaults && 4841 trace.evlist->core.nr_entries == 0 /* Was --events used? */) { 4842 trace.trace_syscalls = true; 4843 } 4844 /* 4845 * Now that we have --verbose figured out, lets see if we need to parse 4846 * events from .perfconfig, so that if those events fail parsing, say some 4847 * BPF program fails, then we'll be able to use --verbose to see what went 4848 * wrong in more detail. 4849 */ 4850 if (trace.perfconfig_events != NULL) { 4851 struct parse_events_error parse_err; 4852 4853 parse_events_error__init(&parse_err); 4854 err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err); 4855 if (err) 4856 parse_events_error__print(&parse_err, trace.perfconfig_events); 4857 parse_events_error__exit(&parse_err); 4858 if (err) 4859 goto out; 4860 } 4861 4862 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) { 4863 usage_with_options_msg(trace_usage, trace_options, 4864 "cgroup monitoring only available in system-wide mode"); 4865 } 4866 4867 #ifdef HAVE_BPF_SKEL 4868 if (!trace.trace_syscalls) 4869 goto skip_augmentation; 4870 4871 if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) { 4872 pr_debug("Syscall augmentation fails with record, disabling augmentation"); 4873 goto skip_augmentation; 4874 } 4875 4876 trace.skel = augmented_raw_syscalls_bpf__open(); 4877 if (!trace.skel) { 4878 pr_debug("Failed to open augmented syscalls BPF skeleton"); 4879 } else { 4880 /* 4881 * Disable attaching the BPF programs except for sys_enter and 4882 * sys_exit that tail call into this as necessary. 4883 */ 4884 struct bpf_program *prog; 4885 4886 bpf_object__for_each_program(prog, trace.skel->obj) { 4887 if (prog != trace.skel->progs.sys_enter && prog != trace.skel->progs.sys_exit) 4888 bpf_program__set_autoattach(prog, /*autoattach=*/false); 4889 } 4890 4891 err = augmented_raw_syscalls_bpf__load(trace.skel); 4892 4893 if (err < 0) { 4894 libbpf_strerror(err, bf, sizeof(bf)); 4895 pr_debug("Failed to load augmented syscalls BPF skeleton: %s\n", bf); 4896 } else { 4897 augmented_raw_syscalls_bpf__attach(trace.skel); 4898 trace__add_syscall_newtp(&trace); 4899 } 4900 } 4901 4902 err = bpf__setup_bpf_output(trace.evlist); 4903 if (err) { 4904 libbpf_strerror(err, bf, sizeof(bf)); 4905 pr_err("ERROR: Setup BPF output event failed: %s\n", bf); 4906 goto out; 4907 } 4908 trace.syscalls.events.bpf_output = evlist__last(trace.evlist); 4909 assert(evsel__name_is(trace.syscalls.events.bpf_output, "__augmented_syscalls__")); 4910 skip_augmentation: 4911 #endif 4912 err = -1; 4913 4914 if (trace.trace_pgfaults) { 4915 trace.opts.sample_address = true; 4916 trace.opts.sample_time = true; 4917 } 4918 4919 if (trace.opts.mmap_pages == UINT_MAX) 4920 mmap_pages_user_set = false; 4921 4922 if (trace.max_stack == UINT_MAX) { 4923 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack(); 4924 max_stack_user_set = false; 4925 } 4926 4927 #ifdef HAVE_DWARF_UNWIND_SUPPORT 4928 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) { 4929 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false); 4930 } 4931 #endif 4932 4933 if (callchain_param.enabled) { 4934 if (!mmap_pages_user_set && geteuid() == 0) 4935 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4; 4936 4937 symbol_conf.use_callchain = true; 4938 } 4939 4940 if (trace.evlist->core.nr_entries > 0) { 4941 evlist__set_default_evsel_handler(trace.evlist, trace__event_handler); 4942 if (evlist__set_syscall_tp_fields(trace.evlist)) { 4943 perror("failed to set syscalls:* tracepoint fields"); 4944 goto out; 4945 } 4946 } 4947 4948 if (trace.sort_events) { 4949 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace); 4950 ordered_events__set_copy_on_queue(&trace.oe.data, true); 4951 } 4952 4953 /* 4954 * If we are augmenting syscalls, then combine what we put in the 4955 * __augmented_syscalls__ BPF map with what is in the 4956 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF, 4957 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit. 4958 * 4959 * We'll switch to look at two BPF maps, one for sys_enter and the 4960 * other for sys_exit when we start augmenting the sys_exit paths with 4961 * buffers that are being copied from kernel to userspace, think 'read' 4962 * syscall. 4963 */ 4964 if (trace.syscalls.events.bpf_output) { 4965 evlist__for_each_entry(trace.evlist, evsel) { 4966 bool raw_syscalls_sys_exit = evsel__name_is(evsel, "raw_syscalls:sys_exit"); 4967 4968 if (raw_syscalls_sys_exit) { 4969 trace.raw_augmented_syscalls = true; 4970 goto init_augmented_syscall_tp; 4971 } 4972 4973 if (trace.syscalls.events.bpf_output->priv == NULL && 4974 strstr(evsel__name(evsel), "syscalls:sys_enter")) { 4975 struct evsel *augmented = trace.syscalls.events.bpf_output; 4976 if (evsel__init_augmented_syscall_tp(augmented, evsel) || 4977 evsel__init_augmented_syscall_tp_args(augmented)) 4978 goto out; 4979 /* 4980 * Augmented is __augmented_syscalls__ BPF_OUTPUT event 4981 * Above we made sure we can get from the payload the tp fields 4982 * that we get from syscalls:sys_enter tracefs format file. 4983 */ 4984 augmented->handler = trace__sys_enter; 4985 /* 4986 * Now we do the same for the *syscalls:sys_enter event so that 4987 * if we handle it directly, i.e. if the BPF prog returns 0 so 4988 * as not to filter it, then we'll handle it just like we would 4989 * for the BPF_OUTPUT one: 4990 */ 4991 if (evsel__init_augmented_syscall_tp(evsel, evsel) || 4992 evsel__init_augmented_syscall_tp_args(evsel)) 4993 goto out; 4994 evsel->handler = trace__sys_enter; 4995 } 4996 4997 if (strstarts(evsel__name(evsel), "syscalls:sys_exit_")) { 4998 struct syscall_tp *sc; 4999 init_augmented_syscall_tp: 5000 if (evsel__init_augmented_syscall_tp(evsel, evsel)) 5001 goto out; 5002 sc = __evsel__syscall_tp(evsel); 5003 /* 5004 * For now with BPF raw_augmented we hook into 5005 * raw_syscalls:sys_enter and there we get all 5006 * 6 syscall args plus the tracepoint common 5007 * fields and the syscall_nr (another long). 5008 * So we check if that is the case and if so 5009 * don't look after the sc->args_size but 5010 * always after the full raw_syscalls:sys_enter 5011 * payload, which is fixed. 5012 * 5013 * We'll revisit this later to pass 5014 * s->args_size to the BPF augmenter (now 5015 * tools/perf/examples/bpf/augmented_raw_syscalls.c, 5016 * so that it copies only what we need for each 5017 * syscall, like what happens when we use 5018 * syscalls:sys_enter_NAME, so that we reduce 5019 * the kernel/userspace traffic to just what is 5020 * needed for each syscall. 5021 */ 5022 if (trace.raw_augmented_syscalls) 5023 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset; 5024 evsel__init_augmented_syscall_tp_ret(evsel); 5025 evsel->handler = trace__sys_exit; 5026 } 5027 } 5028 } 5029 5030 if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) 5031 return trace__record(&trace, argc-1, &argv[1]); 5032 5033 /* Using just --errno-summary will trigger --summary */ 5034 if (trace.errno_summary && !trace.summary && !trace.summary_only) 5035 trace.summary_only = true; 5036 5037 /* summary_only implies summary option, but don't overwrite summary if set */ 5038 if (trace.summary_only) 5039 trace.summary = trace.summary_only; 5040 5041 if (output_name != NULL) { 5042 err = trace__open_output(&trace, output_name); 5043 if (err < 0) { 5044 perror("failed to create output file"); 5045 goto out; 5046 } 5047 } 5048 5049 err = evswitch__init(&trace.evswitch, trace.evlist, stderr); 5050 if (err) 5051 goto out_close; 5052 5053 err = target__validate(&trace.opts.target); 5054 if (err) { 5055 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 5056 fprintf(trace.output, "%s", bf); 5057 goto out_close; 5058 } 5059 5060 err = target__parse_uid(&trace.opts.target); 5061 if (err) { 5062 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 5063 fprintf(trace.output, "%s", bf); 5064 goto out_close; 5065 } 5066 5067 if (!argc && target__none(&trace.opts.target)) 5068 trace.opts.target.system_wide = true; 5069 5070 if (input_name) 5071 err = trace__replay(&trace); 5072 else 5073 err = trace__run(&trace, argc, argv); 5074 5075 out_close: 5076 if (output_name != NULL) 5077 fclose(trace.output); 5078 out: 5079 trace__exit(&trace); 5080 #ifdef HAVE_BPF_SKEL 5081 augmented_raw_syscalls_bpf__destroy(trace.skel); 5082 #endif 5083 return err; 5084 } 5085