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/random.h> 78 #include <linux/stringify.h> 79 #include <linux/time64.h> 80 #include <linux/zalloc.h> 81 #include <fcntl.h> 82 #include <sys/sysmacros.h> 83 84 #include <linux/ctype.h> 85 #include <perf/mmap.h> 86 87 #ifdef HAVE_LIBTRACEEVENT 88 #include <traceevent/event-parse.h> 89 #endif 90 91 #ifndef O_CLOEXEC 92 # define O_CLOEXEC 02000000 93 #endif 94 95 #ifndef F_LINUX_SPECIFIC_BASE 96 # define F_LINUX_SPECIFIC_BASE 1024 97 #endif 98 99 #define RAW_SYSCALL_ARGS_NUM 6 100 101 /* 102 * strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100 103 */ 104 struct syscall_arg_fmt { 105 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 106 bool (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val); 107 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val); 108 void *parm; 109 const char *name; 110 u16 nr_entries; // for arrays 111 bool show_zero; 112 }; 113 114 struct syscall_fmt { 115 const char *name; 116 const char *alias; 117 struct { 118 const char *sys_enter, 119 *sys_exit; 120 } bpf_prog_name; 121 struct syscall_arg_fmt arg[RAW_SYSCALL_ARGS_NUM]; 122 u8 nr_args; 123 bool errpid; 124 bool timeout; 125 bool hexret; 126 }; 127 128 struct trace { 129 struct perf_tool tool; 130 struct syscalltbl *sctbl; 131 struct { 132 struct syscall *table; 133 struct { 134 struct evsel *sys_enter, 135 *sys_exit, 136 *bpf_output; 137 } events; 138 } syscalls; 139 #ifdef HAVE_BPF_SKEL 140 struct augmented_raw_syscalls_bpf *skel; 141 #endif 142 struct record_opts opts; 143 struct evlist *evlist; 144 struct machine *host; 145 struct thread *current; 146 struct cgroup *cgroup; 147 u64 base_time; 148 FILE *output; 149 unsigned long nr_events; 150 unsigned long nr_events_printed; 151 unsigned long max_events; 152 struct evswitch evswitch; 153 struct strlist *ev_qualifier; 154 struct { 155 size_t nr; 156 int *entries; 157 } ev_qualifier_ids; 158 struct { 159 size_t nr; 160 pid_t *entries; 161 struct bpf_map *map; 162 } filter_pids; 163 double duration_filter; 164 double runtime_ms; 165 struct { 166 u64 vfs_getname, 167 proc_getname; 168 } stats; 169 unsigned int max_stack; 170 unsigned int min_stack; 171 int raw_augmented_syscalls_args_size; 172 bool raw_augmented_syscalls; 173 bool fd_path_disabled; 174 bool sort_events; 175 bool not_ev_qualifier; 176 bool live; 177 bool full_time; 178 bool sched; 179 bool multiple_threads; 180 bool summary; 181 bool summary_only; 182 bool errno_summary; 183 bool failure_only; 184 bool show_comm; 185 bool print_sample; 186 bool show_tool_stats; 187 bool trace_syscalls; 188 bool libtraceevent_print; 189 bool kernel_syscallchains; 190 s16 args_alignment; 191 bool show_tstamp; 192 bool show_duration; 193 bool show_zeros; 194 bool show_arg_names; 195 bool show_string_prefix; 196 bool force; 197 bool vfs_getname; 198 int trace_pgfaults; 199 char *perfconfig_events; 200 struct { 201 struct ordered_events data; 202 u64 last; 203 } oe; 204 }; 205 206 struct tp_field { 207 int offset; 208 union { 209 u64 (*integer)(struct tp_field *field, struct perf_sample *sample); 210 void *(*pointer)(struct tp_field *field, struct perf_sample *sample); 211 }; 212 }; 213 214 #define TP_UINT_FIELD(bits) \ 215 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \ 216 { \ 217 u##bits value; \ 218 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 219 return value; \ 220 } 221 222 TP_UINT_FIELD(8); 223 TP_UINT_FIELD(16); 224 TP_UINT_FIELD(32); 225 TP_UINT_FIELD(64); 226 227 #define TP_UINT_FIELD__SWAPPED(bits) \ 228 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \ 229 { \ 230 u##bits value; \ 231 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 232 return bswap_##bits(value);\ 233 } 234 235 TP_UINT_FIELD__SWAPPED(16); 236 TP_UINT_FIELD__SWAPPED(32); 237 TP_UINT_FIELD__SWAPPED(64); 238 239 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap) 240 { 241 field->offset = offset; 242 243 switch (size) { 244 case 1: 245 field->integer = tp_field__u8; 246 break; 247 case 2: 248 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16; 249 break; 250 case 4: 251 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32; 252 break; 253 case 8: 254 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64; 255 break; 256 default: 257 return -1; 258 } 259 260 return 0; 261 } 262 263 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap) 264 { 265 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap); 266 } 267 268 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample) 269 { 270 return sample->raw_data + field->offset; 271 } 272 273 static int __tp_field__init_ptr(struct tp_field *field, int offset) 274 { 275 field->offset = offset; 276 field->pointer = tp_field__ptr; 277 return 0; 278 } 279 280 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field) 281 { 282 return __tp_field__init_ptr(field, format_field->offset); 283 } 284 285 struct syscall_tp { 286 struct tp_field id; 287 union { 288 struct tp_field args, ret; 289 }; 290 }; 291 292 /* 293 * The evsel->priv as used by 'perf trace' 294 * sc: for raw_syscalls:sys_{enter,exit} and syscalls:sys_{enter,exit}_SYSCALLNAME 295 * fmt: for all the other tracepoints 296 */ 297 struct evsel_trace { 298 struct syscall_tp sc; 299 struct syscall_arg_fmt *fmt; 300 }; 301 302 static struct evsel_trace *evsel_trace__new(void) 303 { 304 return zalloc(sizeof(struct evsel_trace)); 305 } 306 307 static void evsel_trace__delete(struct evsel_trace *et) 308 { 309 if (et == NULL) 310 return; 311 312 zfree(&et->fmt); 313 free(et); 314 } 315 316 /* 317 * Used with raw_syscalls:sys_{enter,exit} and with the 318 * syscalls:sys_{enter,exit}_SYSCALL tracepoints 319 */ 320 static inline struct syscall_tp *__evsel__syscall_tp(struct evsel *evsel) 321 { 322 struct evsel_trace *et = evsel->priv; 323 324 return &et->sc; 325 } 326 327 static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel) 328 { 329 if (evsel->priv == NULL) { 330 evsel->priv = evsel_trace__new(); 331 if (evsel->priv == NULL) 332 return NULL; 333 } 334 335 return __evsel__syscall_tp(evsel); 336 } 337 338 /* 339 * Used with all the other tracepoints. 340 */ 341 static inline struct syscall_arg_fmt *__evsel__syscall_arg_fmt(struct evsel *evsel) 342 { 343 struct evsel_trace *et = evsel->priv; 344 345 return et->fmt; 346 } 347 348 static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel) 349 { 350 struct evsel_trace *et = evsel->priv; 351 352 if (evsel->priv == NULL) { 353 et = evsel->priv = evsel_trace__new(); 354 355 if (et == NULL) 356 return NULL; 357 } 358 359 if (et->fmt == NULL) { 360 et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt)); 361 if (et->fmt == NULL) 362 goto out_delete; 363 } 364 365 return __evsel__syscall_arg_fmt(evsel); 366 367 out_delete: 368 evsel_trace__delete(evsel->priv); 369 evsel->priv = NULL; 370 return NULL; 371 } 372 373 static int evsel__init_tp_uint_field(struct evsel *evsel, struct tp_field *field, const char *name) 374 { 375 struct tep_format_field *format_field = evsel__field(evsel, name); 376 377 if (format_field == NULL) 378 return -1; 379 380 return tp_field__init_uint(field, format_field, evsel->needs_swap); 381 } 382 383 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \ 384 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\ 385 evsel__init_tp_uint_field(evsel, &sc->name, #name); }) 386 387 static int evsel__init_tp_ptr_field(struct evsel *evsel, struct tp_field *field, const char *name) 388 { 389 struct tep_format_field *format_field = evsel__field(evsel, name); 390 391 if (format_field == NULL) 392 return -1; 393 394 return tp_field__init_ptr(field, format_field); 395 } 396 397 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \ 398 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\ 399 evsel__init_tp_ptr_field(evsel, &sc->name, #name); }) 400 401 static void evsel__delete_priv(struct evsel *evsel) 402 { 403 zfree(&evsel->priv); 404 evsel__delete(evsel); 405 } 406 407 static int evsel__init_syscall_tp(struct evsel *evsel) 408 { 409 struct syscall_tp *sc = evsel__syscall_tp(evsel); 410 411 if (sc != NULL) { 412 if (evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") && 413 evsel__init_tp_uint_field(evsel, &sc->id, "nr")) 414 return -ENOENT; 415 416 return 0; 417 } 418 419 return -ENOMEM; 420 } 421 422 static int evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp) 423 { 424 struct syscall_tp *sc = evsel__syscall_tp(evsel); 425 426 if (sc != NULL) { 427 struct tep_format_field *syscall_id = evsel__field(tp, "id"); 428 if (syscall_id == NULL) 429 syscall_id = evsel__field(tp, "__syscall_nr"); 430 if (syscall_id == NULL || 431 __tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap)) 432 return -EINVAL; 433 434 return 0; 435 } 436 437 return -ENOMEM; 438 } 439 440 static int evsel__init_augmented_syscall_tp_args(struct evsel *evsel) 441 { 442 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 443 444 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)); 445 } 446 447 static int evsel__init_augmented_syscall_tp_ret(struct evsel *evsel) 448 { 449 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 450 451 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap); 452 } 453 454 static int evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler) 455 { 456 if (evsel__syscall_tp(evsel) != NULL) { 457 if (perf_evsel__init_sc_tp_uint_field(evsel, id)) 458 return -ENOENT; 459 460 evsel->handler = handler; 461 return 0; 462 } 463 464 return -ENOMEM; 465 } 466 467 static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler) 468 { 469 struct evsel *evsel = evsel__newtp("raw_syscalls", direction); 470 471 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */ 472 if (IS_ERR(evsel)) 473 evsel = evsel__newtp("syscalls", direction); 474 475 if (IS_ERR(evsel)) 476 return NULL; 477 478 if (evsel__init_raw_syscall_tp(evsel, handler)) 479 goto out_delete; 480 481 return evsel; 482 483 out_delete: 484 evsel__delete_priv(evsel); 485 return NULL; 486 } 487 488 #define perf_evsel__sc_tp_uint(evsel, name, sample) \ 489 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \ 490 fields->name.integer(&fields->name, sample); }) 491 492 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \ 493 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \ 494 fields->name.pointer(&fields->name, sample); }) 495 496 size_t strarray__scnprintf_suffix(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_suffix, int val) 497 { 498 int idx = val - sa->offset; 499 500 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { 501 size_t printed = scnprintf(bf, size, intfmt, val); 502 if (show_suffix) 503 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); 504 return printed; 505 } 506 507 return scnprintf(bf, size, "%s%s", sa->entries[idx], show_suffix ? sa->prefix : ""); 508 } 509 510 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 511 { 512 int idx = val - sa->offset; 513 514 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { 515 size_t printed = scnprintf(bf, size, intfmt, val); 516 if (show_prefix) 517 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); 518 return printed; 519 } 520 521 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 522 } 523 524 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size, 525 const char *intfmt, 526 struct syscall_arg *arg) 527 { 528 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val); 529 } 530 531 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size, 532 struct syscall_arg *arg) 533 { 534 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg); 535 } 536 537 #define SCA_STRARRAY syscall_arg__scnprintf_strarray 538 539 bool syscall_arg__strtoul_strarray(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) 540 { 541 return strarray__strtoul(arg->parm, bf, size, ret); 542 } 543 544 bool syscall_arg__strtoul_strarray_flags(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) 545 { 546 return strarray__strtoul_flags(arg->parm, bf, size, ret); 547 } 548 549 bool syscall_arg__strtoul_strarrays(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) 550 { 551 return strarrays__strtoul(arg->parm, bf, size, ret); 552 } 553 554 size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg) 555 { 556 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val); 557 } 558 559 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 560 { 561 size_t printed; 562 int i; 563 564 for (i = 0; i < sas->nr_entries; ++i) { 565 struct strarray *sa = sas->entries[i]; 566 int idx = val - sa->offset; 567 568 if (idx >= 0 && idx < sa->nr_entries) { 569 if (sa->entries[idx] == NULL) 570 break; 571 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 572 } 573 } 574 575 printed = scnprintf(bf, size, intfmt, val); 576 if (show_prefix) 577 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix); 578 return printed; 579 } 580 581 bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret) 582 { 583 int i; 584 585 for (i = 0; i < sa->nr_entries; ++i) { 586 if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') { 587 *ret = sa->offset + i; 588 return true; 589 } 590 } 591 592 return false; 593 } 594 595 bool strarray__strtoul_flags(struct strarray *sa, char *bf, size_t size, u64 *ret) 596 { 597 u64 val = 0; 598 char *tok = bf, *sep, *end; 599 600 *ret = 0; 601 602 while (size != 0) { 603 int toklen = size; 604 605 sep = memchr(tok, '|', size); 606 if (sep != NULL) { 607 size -= sep - tok + 1; 608 609 end = sep - 1; 610 while (end > tok && isspace(*end)) 611 --end; 612 613 toklen = end - tok + 1; 614 } 615 616 while (isspace(*tok)) 617 ++tok; 618 619 if (isalpha(*tok) || *tok == '_') { 620 if (!strarray__strtoul(sa, tok, toklen, &val)) 621 return false; 622 } else 623 val = strtoul(tok, NULL, 0); 624 625 *ret |= (1 << (val - 1)); 626 627 if (sep == NULL) 628 break; 629 tok = sep + 1; 630 } 631 632 return true; 633 } 634 635 bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret) 636 { 637 int i; 638 639 for (i = 0; i < sas->nr_entries; ++i) { 640 struct strarray *sa = sas->entries[i]; 641 642 if (strarray__strtoul(sa, bf, size, ret)) 643 return true; 644 } 645 646 return false; 647 } 648 649 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size, 650 struct syscall_arg *arg) 651 { 652 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val); 653 } 654 655 #ifndef AT_FDCWD 656 #define AT_FDCWD -100 657 #endif 658 659 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size, 660 struct syscall_arg *arg) 661 { 662 int fd = arg->val; 663 const char *prefix = "AT_FD"; 664 665 if (fd == AT_FDCWD) 666 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD"); 667 668 return syscall_arg__scnprintf_fd(bf, size, arg); 669 } 670 671 #define SCA_FDAT syscall_arg__scnprintf_fd_at 672 673 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 674 struct syscall_arg *arg); 675 676 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd 677 678 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg) 679 { 680 return scnprintf(bf, size, "%#lx", arg->val); 681 } 682 683 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg) 684 { 685 if (arg->val == 0) 686 return scnprintf(bf, size, "NULL"); 687 return syscall_arg__scnprintf_hex(bf, size, arg); 688 } 689 690 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg) 691 { 692 return scnprintf(bf, size, "%d", arg->val); 693 } 694 695 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg) 696 { 697 return scnprintf(bf, size, "%ld", arg->val); 698 } 699 700 static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg) 701 { 702 // XXX Hey, maybe for sched:sched_switch prev/next comm fields we can 703 // fill missing comms using thread__set_comm()... 704 // here or in a special syscall_arg__scnprintf_pid_sched_tp... 705 return scnprintf(bf, size, "\"%-.*s\"", arg->fmt->nr_entries ?: arg->len, arg->val); 706 } 707 708 #define SCA_CHAR_ARRAY syscall_arg__scnprintf_char_array 709 710 static const char *bpf_cmd[] = { 711 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM", 712 "MAP_GET_NEXT_KEY", "PROG_LOAD", "OBJ_PIN", "OBJ_GET", "PROG_ATTACH", 713 "PROG_DETACH", "PROG_TEST_RUN", "PROG_GET_NEXT_ID", "MAP_GET_NEXT_ID", 714 "PROG_GET_FD_BY_ID", "MAP_GET_FD_BY_ID", "OBJ_GET_INFO_BY_FD", 715 "PROG_QUERY", "RAW_TRACEPOINT_OPEN", "BTF_LOAD", "BTF_GET_FD_BY_ID", 716 "TASK_FD_QUERY", "MAP_LOOKUP_AND_DELETE_ELEM", "MAP_FREEZE", 717 "BTF_GET_NEXT_ID", "MAP_LOOKUP_BATCH", "MAP_LOOKUP_AND_DELETE_BATCH", 718 "MAP_UPDATE_BATCH", "MAP_DELETE_BATCH", "LINK_CREATE", "LINK_UPDATE", 719 "LINK_GET_FD_BY_ID", "LINK_GET_NEXT_ID", "ENABLE_STATS", "ITER_CREATE", 720 "LINK_DETACH", "PROG_BIND_MAP", 721 }; 722 static DEFINE_STRARRAY(bpf_cmd, "BPF_"); 723 724 static const char *fsmount_flags[] = { 725 [1] = "CLOEXEC", 726 }; 727 static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_"); 728 729 #include "trace/beauty/generated/fsconfig_arrays.c" 730 731 static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_"); 732 733 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", }; 734 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1); 735 736 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", }; 737 static DEFINE_STRARRAY(itimers, "ITIMER_"); 738 739 static const char *keyctl_options[] = { 740 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN", 741 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ", 742 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT", 743 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT", 744 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT", 745 }; 746 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_"); 747 748 static const char *whences[] = { "SET", "CUR", "END", 749 #ifdef SEEK_DATA 750 "DATA", 751 #endif 752 #ifdef SEEK_HOLE 753 "HOLE", 754 #endif 755 }; 756 static DEFINE_STRARRAY(whences, "SEEK_"); 757 758 static const char *fcntl_cmds[] = { 759 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK", 760 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64", 761 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX", 762 "GETOWNER_UIDS", 763 }; 764 static DEFINE_STRARRAY(fcntl_cmds, "F_"); 765 766 static const char *fcntl_linux_specific_cmds[] = { 767 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC", 768 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS", 769 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT", 770 }; 771 772 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE); 773 774 static struct strarray *fcntl_cmds_arrays[] = { 775 &strarray__fcntl_cmds, 776 &strarray__fcntl_linux_specific_cmds, 777 }; 778 779 static DEFINE_STRARRAYS(fcntl_cmds_arrays); 780 781 static const char *rlimit_resources[] = { 782 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE", 783 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO", 784 "RTTIME", 785 }; 786 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_"); 787 788 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", }; 789 static DEFINE_STRARRAY(sighow, "SIG_"); 790 791 static const char *clockid[] = { 792 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID", 793 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME", 794 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI" 795 }; 796 static DEFINE_STRARRAY(clockid, "CLOCK_"); 797 798 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size, 799 struct syscall_arg *arg) 800 { 801 bool show_prefix = arg->show_string_prefix; 802 const char *suffix = "_OK"; 803 size_t printed = 0; 804 int mode = arg->val; 805 806 if (mode == F_OK) /* 0 */ 807 return scnprintf(bf, size, "F%s", show_prefix ? suffix : ""); 808 #define P_MODE(n) \ 809 if (mode & n##_OK) { \ 810 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \ 811 mode &= ~n##_OK; \ 812 } 813 814 P_MODE(R); 815 P_MODE(W); 816 P_MODE(X); 817 #undef P_MODE 818 819 if (mode) 820 printed += scnprintf(bf + printed, size - printed, "|%#x", mode); 821 822 return printed; 823 } 824 825 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode 826 827 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 828 struct syscall_arg *arg); 829 830 #define SCA_FILENAME syscall_arg__scnprintf_filename 831 832 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size, 833 struct syscall_arg *arg) 834 { 835 bool show_prefix = arg->show_string_prefix; 836 const char *prefix = "O_"; 837 int printed = 0, flags = arg->val; 838 839 #define P_FLAG(n) \ 840 if (flags & O_##n) { \ 841 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 842 flags &= ~O_##n; \ 843 } 844 845 P_FLAG(CLOEXEC); 846 P_FLAG(NONBLOCK); 847 #undef P_FLAG 848 849 if (flags) 850 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 851 852 return printed; 853 } 854 855 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags 856 857 #ifndef GRND_NONBLOCK 858 #define GRND_NONBLOCK 0x0001 859 #endif 860 #ifndef GRND_RANDOM 861 #define GRND_RANDOM 0x0002 862 #endif 863 864 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size, 865 struct syscall_arg *arg) 866 { 867 bool show_prefix = arg->show_string_prefix; 868 const char *prefix = "GRND_"; 869 int printed = 0, flags = arg->val; 870 871 #define P_FLAG(n) \ 872 if (flags & GRND_##n) { \ 873 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 874 flags &= ~GRND_##n; \ 875 } 876 877 P_FLAG(RANDOM); 878 P_FLAG(NONBLOCK); 879 #undef P_FLAG 880 881 if (flags) 882 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 883 884 return printed; 885 } 886 887 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags 888 889 #define STRARRAY(name, array) \ 890 { .scnprintf = SCA_STRARRAY, \ 891 .strtoul = STUL_STRARRAY, \ 892 .parm = &strarray__##array, } 893 894 #define STRARRAY_FLAGS(name, array) \ 895 { .scnprintf = SCA_STRARRAY_FLAGS, \ 896 .strtoul = STUL_STRARRAY_FLAGS, \ 897 .parm = &strarray__##array, } 898 899 #include "trace/beauty/arch_errno_names.c" 900 #include "trace/beauty/eventfd.c" 901 #include "trace/beauty/futex_op.c" 902 #include "trace/beauty/futex_val3.c" 903 #include "trace/beauty/mmap.c" 904 #include "trace/beauty/mode_t.c" 905 #include "trace/beauty/msg_flags.c" 906 #include "trace/beauty/open_flags.c" 907 #include "trace/beauty/perf_event_open.c" 908 #include "trace/beauty/pid.c" 909 #include "trace/beauty/sched_policy.c" 910 #include "trace/beauty/seccomp.c" 911 #include "trace/beauty/signum.c" 912 #include "trace/beauty/socket_type.c" 913 #include "trace/beauty/waitid_options.c" 914 915 static const struct syscall_fmt syscall_fmts[] = { 916 { .name = "access", 917 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, }, 918 { .name = "arch_prctl", 919 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ }, 920 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, }, 921 { .name = "bind", 922 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ }, 923 [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ }, 924 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, }, 925 { .name = "bpf", 926 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, }, 927 { .name = "brk", .hexret = true, 928 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, }, 929 { .name = "clock_gettime", 930 .arg = { [0] = STRARRAY(clk_id, clockid), }, }, 931 { .name = "clock_nanosleep", 932 .arg = { [2] = { .scnprintf = SCA_TIMESPEC, /* rqtp */ }, }, }, 933 { .name = "clone", .errpid = true, .nr_args = 5, 934 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, }, 935 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, }, 936 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, }, 937 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, }, 938 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, }, 939 { .name = "close", 940 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, }, 941 { .name = "connect", 942 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ }, 943 [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ }, 944 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, }, 945 { .name = "epoll_ctl", 946 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, }, 947 { .name = "eventfd2", 948 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, }, 949 { .name = "fchmodat", 950 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 951 { .name = "fchownat", 952 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 953 { .name = "fcntl", 954 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */ 955 .strtoul = STUL_STRARRAYS, 956 .parm = &strarrays__fcntl_cmds_arrays, 957 .show_zero = true, }, 958 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, }, 959 { .name = "flock", 960 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, }, 961 { .name = "fsconfig", 962 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, }, 963 { .name = "fsmount", 964 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags), 965 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, }, 966 { .name = "fspick", 967 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 968 [1] = { .scnprintf = SCA_FILENAME, /* path */ }, 969 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, }, 970 { .name = "fstat", .alias = "newfstat", }, 971 { .name = "fstatat", .alias = "newfstatat", }, 972 { .name = "futex", 973 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ }, 974 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, }, 975 { .name = "futimesat", 976 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 977 { .name = "getitimer", 978 .arg = { [0] = STRARRAY(which, itimers), }, }, 979 { .name = "getpid", .errpid = true, }, 980 { .name = "getpgid", .errpid = true, }, 981 { .name = "getppid", .errpid = true, }, 982 { .name = "getrandom", 983 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, }, 984 { .name = "getrlimit", 985 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 986 { .name = "getsockopt", 987 .arg = { [1] = STRARRAY(level, socket_level), }, }, 988 { .name = "gettid", .errpid = true, }, 989 { .name = "ioctl", 990 .arg = { 991 #if defined(__i386__) || defined(__x86_64__) 992 /* 993 * FIXME: Make this available to all arches. 994 */ 995 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ }, 996 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 997 #else 998 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 999 #endif 1000 { .name = "kcmp", .nr_args = 5, 1001 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, }, 1002 [1] = { .name = "pid2", .scnprintf = SCA_PID, }, 1003 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, }, 1004 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, }, 1005 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, }, 1006 { .name = "keyctl", 1007 .arg = { [0] = STRARRAY(option, keyctl_options), }, }, 1008 { .name = "kill", 1009 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1010 { .name = "linkat", 1011 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 1012 { .name = "lseek", 1013 .arg = { [2] = STRARRAY(whence, whences), }, }, 1014 { .name = "lstat", .alias = "newlstat", }, 1015 { .name = "madvise", 1016 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 1017 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, }, 1018 { .name = "mkdirat", 1019 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 1020 { .name = "mknodat", 1021 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 1022 { .name = "mmap", .hexret = true, 1023 /* The standard mmap maps to old_mmap on s390x */ 1024 #if defined(__s390x__) 1025 .alias = "old_mmap", 1026 #endif 1027 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 1028 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ 1029 .strtoul = STUL_STRARRAY_FLAGS, 1030 .parm = &strarray__mmap_flags, }, 1031 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, }, 1032 { .name = "mount", 1033 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ }, 1034 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ 1035 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, }, 1036 { .name = "move_mount", 1037 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ }, 1038 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ }, 1039 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ }, 1040 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ }, 1041 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, }, 1042 { .name = "mprotect", 1043 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 1044 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, }, 1045 { .name = "mq_unlink", 1046 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, }, 1047 { .name = "mremap", .hexret = true, 1048 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, }, 1049 { .name = "name_to_handle_at", 1050 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1051 { .name = "newfstatat", 1052 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1053 { .name = "open", 1054 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 1055 { .name = "open_by_handle_at", 1056 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 1057 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 1058 { .name = "openat", 1059 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 1060 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 1061 { .name = "perf_event_open", 1062 .arg = { [0] = { .scnprintf = SCA_PERF_ATTR, /* attr */ }, 1063 [2] = { .scnprintf = SCA_INT, /* cpu */ }, 1064 [3] = { .scnprintf = SCA_FD, /* group_fd */ }, 1065 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, }, 1066 { .name = "pipe2", 1067 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, }, 1068 { .name = "pkey_alloc", 1069 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, }, 1070 { .name = "pkey_free", 1071 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, }, 1072 { .name = "pkey_mprotect", 1073 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 1074 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 1075 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, }, 1076 { .name = "poll", .timeout = true, }, 1077 { .name = "ppoll", .timeout = true, }, 1078 { .name = "prctl", 1079 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ 1080 .strtoul = STUL_STRARRAY, 1081 .parm = &strarray__prctl_options, }, 1082 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ }, 1083 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, }, 1084 { .name = "pread", .alias = "pread64", }, 1085 { .name = "preadv", .alias = "pread", }, 1086 { .name = "prlimit64", 1087 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, }, 1088 { .name = "pwrite", .alias = "pwrite64", }, 1089 { .name = "readlinkat", 1090 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1091 { .name = "recvfrom", 1092 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1093 { .name = "recvmmsg", 1094 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1095 { .name = "recvmsg", 1096 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1097 { .name = "renameat", 1098 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 1099 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, }, 1100 { .name = "renameat2", 1101 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 1102 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, 1103 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, }, 1104 { .name = "rt_sigaction", 1105 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1106 { .name = "rt_sigprocmask", 1107 .arg = { [0] = STRARRAY(how, sighow), }, }, 1108 { .name = "rt_sigqueueinfo", 1109 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1110 { .name = "rt_tgsigqueueinfo", 1111 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1112 { .name = "sched_setscheduler", 1113 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, }, 1114 { .name = "seccomp", 1115 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ }, 1116 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, }, 1117 { .name = "select", .timeout = true, }, 1118 { .name = "sendfile", .alias = "sendfile64", }, 1119 { .name = "sendmmsg", 1120 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1121 { .name = "sendmsg", 1122 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1123 { .name = "sendto", 1124 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, 1125 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, }, 1126 { .name = "set_tid_address", .errpid = true, }, 1127 { .name = "setitimer", 1128 .arg = { [0] = STRARRAY(which, itimers), }, }, 1129 { .name = "setrlimit", 1130 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 1131 { .name = "setsockopt", 1132 .arg = { [1] = STRARRAY(level, socket_level), }, }, 1133 { .name = "socket", 1134 .arg = { [0] = STRARRAY(family, socket_families), 1135 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 1136 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 1137 { .name = "socketpair", 1138 .arg = { [0] = STRARRAY(family, socket_families), 1139 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 1140 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 1141 { .name = "stat", .alias = "newstat", }, 1142 { .name = "statx", 1143 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ }, 1144 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } , 1145 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, }, 1146 { .name = "swapoff", 1147 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 1148 { .name = "swapon", 1149 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 1150 { .name = "symlinkat", 1151 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1152 { .name = "sync_file_range", 1153 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, }, 1154 { .name = "tgkill", 1155 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1156 { .name = "tkill", 1157 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1158 { .name = "umount2", .alias = "umount", 1159 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, }, 1160 { .name = "uname", .alias = "newuname", }, 1161 { .name = "unlinkat", 1162 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1163 { .name = "utimensat", 1164 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, }, 1165 { .name = "wait4", .errpid = true, 1166 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 1167 { .name = "waitid", .errpid = true, 1168 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 1169 }; 1170 1171 static int syscall_fmt__cmp(const void *name, const void *fmtp) 1172 { 1173 const struct syscall_fmt *fmt = fmtp; 1174 return strcmp(name, fmt->name); 1175 } 1176 1177 static const struct syscall_fmt *__syscall_fmt__find(const struct syscall_fmt *fmts, 1178 const int nmemb, 1179 const char *name) 1180 { 1181 return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp); 1182 } 1183 1184 static const struct syscall_fmt *syscall_fmt__find(const char *name) 1185 { 1186 const int nmemb = ARRAY_SIZE(syscall_fmts); 1187 return __syscall_fmt__find(syscall_fmts, nmemb, name); 1188 } 1189 1190 static const struct syscall_fmt *__syscall_fmt__find_by_alias(const struct syscall_fmt *fmts, 1191 const int nmemb, const char *alias) 1192 { 1193 int i; 1194 1195 for (i = 0; i < nmemb; ++i) { 1196 if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0) 1197 return &fmts[i]; 1198 } 1199 1200 return NULL; 1201 } 1202 1203 static const struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias) 1204 { 1205 const int nmemb = ARRAY_SIZE(syscall_fmts); 1206 return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias); 1207 } 1208 1209 /* 1210 * is_exit: is this "exit" or "exit_group"? 1211 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter. 1212 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc. 1213 * nonexistent: Just a hole in the syscall table, syscall id not allocated 1214 */ 1215 struct syscall { 1216 struct tep_event *tp_format; 1217 int nr_args; 1218 int args_size; 1219 struct { 1220 struct bpf_program *sys_enter, 1221 *sys_exit; 1222 } bpf_prog; 1223 bool is_exit; 1224 bool is_open; 1225 bool nonexistent; 1226 struct tep_format_field *args; 1227 const char *name; 1228 const struct syscall_fmt *fmt; 1229 struct syscall_arg_fmt *arg_fmt; 1230 }; 1231 1232 /* 1233 * We need to have this 'calculated' boolean because in some cases we really 1234 * don't know what is the duration of a syscall, for instance, when we start 1235 * a session and some threads are waiting for a syscall to finish, say 'poll', 1236 * in which case all we can do is to print "( ? ) for duration and for the 1237 * start timestamp. 1238 */ 1239 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp) 1240 { 1241 double duration = (double)t / NSEC_PER_MSEC; 1242 size_t printed = fprintf(fp, "("); 1243 1244 if (!calculated) 1245 printed += fprintf(fp, " "); 1246 else if (duration >= 1.0) 1247 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration); 1248 else if (duration >= 0.01) 1249 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration); 1250 else 1251 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration); 1252 return printed + fprintf(fp, "): "); 1253 } 1254 1255 /** 1256 * filename.ptr: The filename char pointer that will be vfs_getname'd 1257 * filename.entry_str_pos: Where to insert the string translated from 1258 * filename.ptr by the vfs_getname tracepoint/kprobe. 1259 * ret_scnprintf: syscall args may set this to a different syscall return 1260 * formatter, for instance, fcntl may return fds, file flags, etc. 1261 */ 1262 struct thread_trace { 1263 u64 entry_time; 1264 bool entry_pending; 1265 unsigned long nr_events; 1266 unsigned long pfmaj, pfmin; 1267 char *entry_str; 1268 double runtime_ms; 1269 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 1270 struct { 1271 unsigned long ptr; 1272 short int entry_str_pos; 1273 bool pending_open; 1274 unsigned int namelen; 1275 char *name; 1276 } filename; 1277 struct { 1278 int max; 1279 struct file *table; 1280 } files; 1281 1282 struct intlist *syscall_stats; 1283 }; 1284 1285 static struct thread_trace *thread_trace__new(void) 1286 { 1287 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace)); 1288 1289 if (ttrace) { 1290 ttrace->files.max = -1; 1291 ttrace->syscall_stats = intlist__new(NULL); 1292 } 1293 1294 return ttrace; 1295 } 1296 1297 static void thread_trace__free_files(struct thread_trace *ttrace); 1298 1299 static void thread_trace__delete(void *pttrace) 1300 { 1301 struct thread_trace *ttrace = pttrace; 1302 1303 if (!ttrace) 1304 return; 1305 1306 intlist__delete(ttrace->syscall_stats); 1307 ttrace->syscall_stats = NULL; 1308 thread_trace__free_files(ttrace); 1309 zfree(&ttrace->entry_str); 1310 free(ttrace); 1311 } 1312 1313 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp) 1314 { 1315 struct thread_trace *ttrace; 1316 1317 if (thread == NULL) 1318 goto fail; 1319 1320 if (thread__priv(thread) == NULL) 1321 thread__set_priv(thread, thread_trace__new()); 1322 1323 if (thread__priv(thread) == NULL) 1324 goto fail; 1325 1326 ttrace = thread__priv(thread); 1327 ++ttrace->nr_events; 1328 1329 return ttrace; 1330 fail: 1331 color_fprintf(fp, PERF_COLOR_RED, 1332 "WARNING: not enough memory, dropping samples!\n"); 1333 return NULL; 1334 } 1335 1336 1337 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg, 1338 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg)) 1339 { 1340 struct thread_trace *ttrace = thread__priv(arg->thread); 1341 1342 ttrace->ret_scnprintf = ret_scnprintf; 1343 } 1344 1345 #define TRACE_PFMAJ (1 << 0) 1346 #define TRACE_PFMIN (1 << 1) 1347 1348 static const size_t trace__entry_str_size = 2048; 1349 1350 static void thread_trace__free_files(struct thread_trace *ttrace) 1351 { 1352 for (int i = 0; i < ttrace->files.max; ++i) { 1353 struct file *file = ttrace->files.table + i; 1354 zfree(&file->pathname); 1355 } 1356 1357 zfree(&ttrace->files.table); 1358 ttrace->files.max = -1; 1359 } 1360 1361 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd) 1362 { 1363 if (fd < 0) 1364 return NULL; 1365 1366 if (fd > ttrace->files.max) { 1367 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file)); 1368 1369 if (nfiles == NULL) 1370 return NULL; 1371 1372 if (ttrace->files.max != -1) { 1373 memset(nfiles + ttrace->files.max + 1, 0, 1374 (fd - ttrace->files.max) * sizeof(struct file)); 1375 } else { 1376 memset(nfiles, 0, (fd + 1) * sizeof(struct file)); 1377 } 1378 1379 ttrace->files.table = nfiles; 1380 ttrace->files.max = fd; 1381 } 1382 1383 return ttrace->files.table + fd; 1384 } 1385 1386 struct file *thread__files_entry(struct thread *thread, int fd) 1387 { 1388 return thread_trace__files_entry(thread__priv(thread), fd); 1389 } 1390 1391 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname) 1392 { 1393 struct thread_trace *ttrace = thread__priv(thread); 1394 struct file *file = thread_trace__files_entry(ttrace, fd); 1395 1396 if (file != NULL) { 1397 struct stat st; 1398 if (stat(pathname, &st) == 0) 1399 file->dev_maj = major(st.st_rdev); 1400 file->pathname = strdup(pathname); 1401 if (file->pathname) 1402 return 0; 1403 } 1404 1405 return -1; 1406 } 1407 1408 static int thread__read_fd_path(struct thread *thread, int fd) 1409 { 1410 char linkname[PATH_MAX], pathname[PATH_MAX]; 1411 struct stat st; 1412 int ret; 1413 1414 if (thread__pid(thread) == thread__tid(thread)) { 1415 scnprintf(linkname, sizeof(linkname), 1416 "/proc/%d/fd/%d", thread__pid(thread), fd); 1417 } else { 1418 scnprintf(linkname, sizeof(linkname), 1419 "/proc/%d/task/%d/fd/%d", 1420 thread__pid(thread), thread__tid(thread), fd); 1421 } 1422 1423 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname)) 1424 return -1; 1425 1426 ret = readlink(linkname, pathname, sizeof(pathname)); 1427 1428 if (ret < 0 || ret > st.st_size) 1429 return -1; 1430 1431 pathname[ret] = '\0'; 1432 return trace__set_fd_pathname(thread, fd, pathname); 1433 } 1434 1435 static const char *thread__fd_path(struct thread *thread, int fd, 1436 struct trace *trace) 1437 { 1438 struct thread_trace *ttrace = thread__priv(thread); 1439 1440 if (ttrace == NULL || trace->fd_path_disabled) 1441 return NULL; 1442 1443 if (fd < 0) 1444 return NULL; 1445 1446 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) { 1447 if (!trace->live) 1448 return NULL; 1449 ++trace->stats.proc_getname; 1450 if (thread__read_fd_path(thread, fd)) 1451 return NULL; 1452 } 1453 1454 return ttrace->files.table[fd].pathname; 1455 } 1456 1457 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg) 1458 { 1459 int fd = arg->val; 1460 size_t printed = scnprintf(bf, size, "%d", fd); 1461 const char *path = thread__fd_path(arg->thread, fd, arg->trace); 1462 1463 if (path) 1464 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1465 1466 return printed; 1467 } 1468 1469 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size) 1470 { 1471 size_t printed = scnprintf(bf, size, "%d", fd); 1472 struct thread *thread = machine__find_thread(trace->host, pid, pid); 1473 1474 if (thread) { 1475 const char *path = thread__fd_path(thread, fd, trace); 1476 1477 if (path) 1478 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1479 1480 thread__put(thread); 1481 } 1482 1483 return printed; 1484 } 1485 1486 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 1487 struct syscall_arg *arg) 1488 { 1489 int fd = arg->val; 1490 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg); 1491 struct thread_trace *ttrace = thread__priv(arg->thread); 1492 1493 if (ttrace && fd >= 0 && fd <= ttrace->files.max) 1494 zfree(&ttrace->files.table[fd].pathname); 1495 1496 return printed; 1497 } 1498 1499 static void thread__set_filename_pos(struct thread *thread, const char *bf, 1500 unsigned long ptr) 1501 { 1502 struct thread_trace *ttrace = thread__priv(thread); 1503 1504 ttrace->filename.ptr = ptr; 1505 ttrace->filename.entry_str_pos = bf - ttrace->entry_str; 1506 } 1507 1508 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size) 1509 { 1510 struct augmented_arg *augmented_arg = arg->augmented.args; 1511 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value); 1512 /* 1513 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls 1514 * we would have two strings, each prefixed by its size. 1515 */ 1516 int consumed = sizeof(*augmented_arg) + augmented_arg->size; 1517 1518 arg->augmented.args = ((void *)arg->augmented.args) + consumed; 1519 arg->augmented.size -= consumed; 1520 1521 return printed; 1522 } 1523 1524 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 1525 struct syscall_arg *arg) 1526 { 1527 unsigned long ptr = arg->val; 1528 1529 if (arg->augmented.args) 1530 return syscall_arg__scnprintf_augmented_string(arg, bf, size); 1531 1532 if (!arg->trace->vfs_getname) 1533 return scnprintf(bf, size, "%#x", ptr); 1534 1535 thread__set_filename_pos(arg->thread, bf, ptr); 1536 return 0; 1537 } 1538 1539 static bool trace__filter_duration(struct trace *trace, double t) 1540 { 1541 return t < (trace->duration_filter * NSEC_PER_MSEC); 1542 } 1543 1544 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1545 { 1546 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC; 1547 1548 return fprintf(fp, "%10.3f ", ts); 1549 } 1550 1551 /* 1552 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are 1553 * using ttrace->entry_time for a thread that receives a sys_exit without 1554 * first having received a sys_enter ("poll" issued before tracing session 1555 * starts, lost sys_enter exit due to ring buffer overflow). 1556 */ 1557 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1558 { 1559 if (tstamp > 0) 1560 return __trace__fprintf_tstamp(trace, tstamp, fp); 1561 1562 return fprintf(fp, " ? "); 1563 } 1564 1565 static pid_t workload_pid = -1; 1566 static volatile sig_atomic_t done = false; 1567 static volatile sig_atomic_t interrupted = false; 1568 1569 static void sighandler_interrupt(int sig __maybe_unused) 1570 { 1571 done = interrupted = true; 1572 } 1573 1574 static void sighandler_chld(int sig __maybe_unused, siginfo_t *info, 1575 void *context __maybe_unused) 1576 { 1577 if (info->si_pid == workload_pid) 1578 done = true; 1579 } 1580 1581 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp) 1582 { 1583 size_t printed = 0; 1584 1585 if (trace->multiple_threads) { 1586 if (trace->show_comm) 1587 printed += fprintf(fp, "%.14s/", thread__comm_str(thread)); 1588 printed += fprintf(fp, "%d ", thread__tid(thread)); 1589 } 1590 1591 return printed; 1592 } 1593 1594 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread, 1595 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp) 1596 { 1597 size_t printed = 0; 1598 1599 if (trace->show_tstamp) 1600 printed = trace__fprintf_tstamp(trace, tstamp, fp); 1601 if (trace->show_duration) 1602 printed += fprintf_duration(duration, duration_calculated, fp); 1603 return printed + trace__fprintf_comm_tid(trace, thread, fp); 1604 } 1605 1606 static int trace__process_event(struct trace *trace, struct machine *machine, 1607 union perf_event *event, struct perf_sample *sample) 1608 { 1609 int ret = 0; 1610 1611 switch (event->header.type) { 1612 case PERF_RECORD_LOST: 1613 color_fprintf(trace->output, PERF_COLOR_RED, 1614 "LOST %" PRIu64 " events!\n", event->lost.lost); 1615 ret = machine__process_lost_event(machine, event, sample); 1616 break; 1617 default: 1618 ret = machine__process_event(machine, event, sample); 1619 break; 1620 } 1621 1622 return ret; 1623 } 1624 1625 static int trace__tool_process(struct perf_tool *tool, 1626 union perf_event *event, 1627 struct perf_sample *sample, 1628 struct machine *machine) 1629 { 1630 struct trace *trace = container_of(tool, struct trace, tool); 1631 return trace__process_event(trace, machine, event, sample); 1632 } 1633 1634 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) 1635 { 1636 struct machine *machine = vmachine; 1637 1638 if (machine->kptr_restrict_warned) 1639 return NULL; 1640 1641 if (symbol_conf.kptr_restrict) { 1642 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" 1643 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n" 1644 "Kernel samples will not be resolved.\n"); 1645 machine->kptr_restrict_warned = true; 1646 return NULL; 1647 } 1648 1649 return machine__resolve_kernel_addr(vmachine, addrp, modp); 1650 } 1651 1652 static int trace__symbols_init(struct trace *trace, struct evlist *evlist) 1653 { 1654 int err = symbol__init(NULL); 1655 1656 if (err) 1657 return err; 1658 1659 trace->host = machine__new_host(); 1660 if (trace->host == NULL) 1661 return -ENOMEM; 1662 1663 thread__set_priv_destructor(thread_trace__delete); 1664 1665 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr); 1666 if (err < 0) 1667 goto out; 1668 1669 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target, 1670 evlist->core.threads, trace__tool_process, 1671 true, false, 1); 1672 out: 1673 if (err) 1674 symbol__exit(); 1675 1676 return err; 1677 } 1678 1679 static void trace__symbols__exit(struct trace *trace) 1680 { 1681 machine__exit(trace->host); 1682 trace->host = NULL; 1683 1684 symbol__exit(); 1685 } 1686 1687 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) 1688 { 1689 int idx; 1690 1691 if (nr_args == RAW_SYSCALL_ARGS_NUM && sc->fmt && sc->fmt->nr_args != 0) 1692 nr_args = sc->fmt->nr_args; 1693 1694 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt)); 1695 if (sc->arg_fmt == NULL) 1696 return -1; 1697 1698 for (idx = 0; idx < nr_args; ++idx) { 1699 if (sc->fmt) 1700 sc->arg_fmt[idx] = sc->fmt->arg[idx]; 1701 } 1702 1703 sc->nr_args = nr_args; 1704 return 0; 1705 } 1706 1707 static const struct syscall_arg_fmt syscall_arg_fmts__by_name[] = { 1708 { .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, }, 1709 { .name = "vector", .scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, }, 1710 }; 1711 1712 static int syscall_arg_fmt__cmp(const void *name, const void *fmtp) 1713 { 1714 const struct syscall_arg_fmt *fmt = fmtp; 1715 return strcmp(name, fmt->name); 1716 } 1717 1718 static const struct syscall_arg_fmt * 1719 __syscall_arg_fmt__find_by_name(const struct syscall_arg_fmt *fmts, const int nmemb, 1720 const char *name) 1721 { 1722 return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp); 1723 } 1724 1725 static const struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name) 1726 { 1727 const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name); 1728 return __syscall_arg_fmt__find_by_name(syscall_arg_fmts__by_name, nmemb, name); 1729 } 1730 1731 static struct tep_format_field * 1732 syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field) 1733 { 1734 struct tep_format_field *last_field = NULL; 1735 int len; 1736 1737 for (; field; field = field->next, ++arg) { 1738 last_field = field; 1739 1740 if (arg->scnprintf) 1741 continue; 1742 1743 len = strlen(field->name); 1744 1745 if (strcmp(field->type, "const char *") == 0 && 1746 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) || 1747 strstr(field->name, "path") != NULL)) 1748 arg->scnprintf = SCA_FILENAME; 1749 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr")) 1750 arg->scnprintf = SCA_PTR; 1751 else if (strcmp(field->type, "pid_t") == 0) 1752 arg->scnprintf = SCA_PID; 1753 else if (strcmp(field->type, "umode_t") == 0) 1754 arg->scnprintf = SCA_MODE_T; 1755 else if ((field->flags & TEP_FIELD_IS_ARRAY) && strstr(field->type, "char")) { 1756 arg->scnprintf = SCA_CHAR_ARRAY; 1757 arg->nr_entries = field->arraylen; 1758 } else if ((strcmp(field->type, "int") == 0 || 1759 strcmp(field->type, "unsigned int") == 0 || 1760 strcmp(field->type, "long") == 0) && 1761 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) { 1762 /* 1763 * /sys/kernel/tracing/events/syscalls/sys_enter* 1764 * grep -E 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c 1765 * 65 int 1766 * 23 unsigned int 1767 * 7 unsigned long 1768 */ 1769 arg->scnprintf = SCA_FD; 1770 } else { 1771 const struct syscall_arg_fmt *fmt = 1772 syscall_arg_fmt__find_by_name(field->name); 1773 1774 if (fmt) { 1775 arg->scnprintf = fmt->scnprintf; 1776 arg->strtoul = fmt->strtoul; 1777 } 1778 } 1779 } 1780 1781 return last_field; 1782 } 1783 1784 static int syscall__set_arg_fmts(struct syscall *sc) 1785 { 1786 struct tep_format_field *last_field = syscall_arg_fmt__init_array(sc->arg_fmt, sc->args); 1787 1788 if (last_field) 1789 sc->args_size = last_field->offset + last_field->size; 1790 1791 return 0; 1792 } 1793 1794 static int trace__read_syscall_info(struct trace *trace, int id) 1795 { 1796 char tp_name[128]; 1797 struct syscall *sc; 1798 const char *name = syscalltbl__name(trace->sctbl, id); 1799 1800 #ifdef HAVE_SYSCALL_TABLE_SUPPORT 1801 if (trace->syscalls.table == NULL) { 1802 trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc)); 1803 if (trace->syscalls.table == NULL) 1804 return -ENOMEM; 1805 } 1806 #else 1807 if (id > trace->sctbl->syscalls.max_id || (id == 0 && trace->syscalls.table == NULL)) { 1808 // When using libaudit we don't know beforehand what is the max syscall id 1809 struct syscall *table = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc)); 1810 1811 if (table == NULL) 1812 return -ENOMEM; 1813 1814 // Need to memset from offset 0 and +1 members if brand new 1815 if (trace->syscalls.table == NULL) 1816 memset(table, 0, (id + 1) * sizeof(*sc)); 1817 else 1818 memset(table + trace->sctbl->syscalls.max_id + 1, 0, (id - trace->sctbl->syscalls.max_id) * sizeof(*sc)); 1819 1820 trace->syscalls.table = table; 1821 trace->sctbl->syscalls.max_id = id; 1822 } 1823 #endif 1824 sc = trace->syscalls.table + id; 1825 if (sc->nonexistent) 1826 return -EEXIST; 1827 1828 if (name == NULL) { 1829 sc->nonexistent = true; 1830 return -EEXIST; 1831 } 1832 1833 sc->name = name; 1834 sc->fmt = syscall_fmt__find(sc->name); 1835 1836 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name); 1837 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1838 1839 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) { 1840 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias); 1841 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1842 } 1843 1844 /* 1845 * Fails to read trace point format via sysfs node, so the trace point 1846 * doesn't exist. Set the 'nonexistent' flag as true. 1847 */ 1848 if (IS_ERR(sc->tp_format)) { 1849 sc->nonexistent = true; 1850 return PTR_ERR(sc->tp_format); 1851 } 1852 1853 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 1854 RAW_SYSCALL_ARGS_NUM : sc->tp_format->format.nr_fields)) 1855 return -ENOMEM; 1856 1857 sc->args = sc->tp_format->format.fields; 1858 /* 1859 * We need to check and discard the first variable '__syscall_nr' 1860 * or 'nr' that mean the syscall number. It is needless here. 1861 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels. 1862 */ 1863 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) { 1864 sc->args = sc->args->next; 1865 --sc->nr_args; 1866 } 1867 1868 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit"); 1869 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat"); 1870 1871 return syscall__set_arg_fmts(sc); 1872 } 1873 1874 static int evsel__init_tp_arg_scnprintf(struct evsel *evsel) 1875 { 1876 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel); 1877 1878 if (fmt != NULL) { 1879 syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields); 1880 return 0; 1881 } 1882 1883 return -ENOMEM; 1884 } 1885 1886 static int intcmp(const void *a, const void *b) 1887 { 1888 const int *one = a, *another = b; 1889 1890 return *one - *another; 1891 } 1892 1893 static int trace__validate_ev_qualifier(struct trace *trace) 1894 { 1895 int err = 0; 1896 bool printed_invalid_prefix = false; 1897 struct str_node *pos; 1898 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier); 1899 1900 trace->ev_qualifier_ids.entries = malloc(nr_allocated * 1901 sizeof(trace->ev_qualifier_ids.entries[0])); 1902 1903 if (trace->ev_qualifier_ids.entries == NULL) { 1904 fputs("Error:\tNot enough memory for allocating events qualifier ids\n", 1905 trace->output); 1906 err = -EINVAL; 1907 goto out; 1908 } 1909 1910 strlist__for_each_entry(pos, trace->ev_qualifier) { 1911 const char *sc = pos->s; 1912 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1; 1913 1914 if (id < 0) { 1915 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next); 1916 if (id >= 0) 1917 goto matches; 1918 1919 if (!printed_invalid_prefix) { 1920 pr_debug("Skipping unknown syscalls: "); 1921 printed_invalid_prefix = true; 1922 } else { 1923 pr_debug(", "); 1924 } 1925 1926 pr_debug("%s", sc); 1927 continue; 1928 } 1929 matches: 1930 trace->ev_qualifier_ids.entries[nr_used++] = id; 1931 if (match_next == -1) 1932 continue; 1933 1934 while (1) { 1935 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next); 1936 if (id < 0) 1937 break; 1938 if (nr_allocated == nr_used) { 1939 void *entries; 1940 1941 nr_allocated += 8; 1942 entries = realloc(trace->ev_qualifier_ids.entries, 1943 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0])); 1944 if (entries == NULL) { 1945 err = -ENOMEM; 1946 fputs("\nError:\t Not enough memory for parsing\n", trace->output); 1947 goto out_free; 1948 } 1949 trace->ev_qualifier_ids.entries = entries; 1950 } 1951 trace->ev_qualifier_ids.entries[nr_used++] = id; 1952 } 1953 } 1954 1955 trace->ev_qualifier_ids.nr = nr_used; 1956 qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp); 1957 out: 1958 if (printed_invalid_prefix) 1959 pr_debug("\n"); 1960 return err; 1961 out_free: 1962 zfree(&trace->ev_qualifier_ids.entries); 1963 trace->ev_qualifier_ids.nr = 0; 1964 goto out; 1965 } 1966 1967 static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id) 1968 { 1969 bool in_ev_qualifier; 1970 1971 if (trace->ev_qualifier_ids.nr == 0) 1972 return true; 1973 1974 in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries, 1975 trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL; 1976 1977 if (in_ev_qualifier) 1978 return !trace->not_ev_qualifier; 1979 1980 return trace->not_ev_qualifier; 1981 } 1982 1983 /* 1984 * args is to be interpreted as a series of longs but we need to handle 1985 * 8-byte unaligned accesses. args points to raw_data within the event 1986 * and raw_data is guaranteed to be 8-byte unaligned because it is 1987 * preceded by raw_size which is a u32. So we need to copy args to a temp 1988 * variable to read it. Most notably this avoids extended load instructions 1989 * on unaligned addresses 1990 */ 1991 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx) 1992 { 1993 unsigned long val; 1994 unsigned char *p = arg->args + sizeof(unsigned long) * idx; 1995 1996 memcpy(&val, p, sizeof(val)); 1997 return val; 1998 } 1999 2000 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size, 2001 struct syscall_arg *arg) 2002 { 2003 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name) 2004 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name); 2005 2006 return scnprintf(bf, size, "arg%d: ", arg->idx); 2007 } 2008 2009 /* 2010 * Check if the value is in fact zero, i.e. mask whatever needs masking, such 2011 * as mount 'flags' argument that needs ignoring some magic flag, see comment 2012 * in tools/perf/trace/beauty/mount_flags.c 2013 */ 2014 static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val) 2015 { 2016 if (fmt && fmt->mask_val) 2017 return fmt->mask_val(arg, val); 2018 2019 return val; 2020 } 2021 2022 static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size, 2023 struct syscall_arg *arg, unsigned long val) 2024 { 2025 if (fmt && fmt->scnprintf) { 2026 arg->val = val; 2027 if (fmt->parm) 2028 arg->parm = fmt->parm; 2029 return fmt->scnprintf(bf, size, arg); 2030 } 2031 return scnprintf(bf, size, "%ld", val); 2032 } 2033 2034 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, 2035 unsigned char *args, void *augmented_args, int augmented_args_size, 2036 struct trace *trace, struct thread *thread) 2037 { 2038 size_t printed = 0; 2039 unsigned long val; 2040 u8 bit = 1; 2041 struct syscall_arg arg = { 2042 .args = args, 2043 .augmented = { 2044 .size = augmented_args_size, 2045 .args = augmented_args, 2046 }, 2047 .idx = 0, 2048 .mask = 0, 2049 .trace = trace, 2050 .thread = thread, 2051 .show_string_prefix = trace->show_string_prefix, 2052 }; 2053 struct thread_trace *ttrace = thread__priv(thread); 2054 2055 /* 2056 * Things like fcntl will set this in its 'cmd' formatter to pick the 2057 * right formatter for the return value (an fd? file flags?), which is 2058 * not needed for syscalls that always return a given type, say an fd. 2059 */ 2060 ttrace->ret_scnprintf = NULL; 2061 2062 if (sc->args != NULL) { 2063 struct tep_format_field *field; 2064 2065 for (field = sc->args; field; 2066 field = field->next, ++arg.idx, bit <<= 1) { 2067 if (arg.mask & bit) 2068 continue; 2069 2070 arg.fmt = &sc->arg_fmt[arg.idx]; 2071 val = syscall_arg__val(&arg, arg.idx); 2072 /* 2073 * Some syscall args need some mask, most don't and 2074 * return val untouched. 2075 */ 2076 val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val); 2077 2078 /* 2079 * Suppress this argument if its value is zero and 2080 * and we don't have a string associated in an 2081 * strarray for it. 2082 */ 2083 if (val == 0 && 2084 !trace->show_zeros && 2085 !(sc->arg_fmt && 2086 (sc->arg_fmt[arg.idx].show_zero || 2087 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY || 2088 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) && 2089 sc->arg_fmt[arg.idx].parm)) 2090 continue; 2091 2092 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); 2093 2094 if (trace->show_arg_names) 2095 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); 2096 2097 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], 2098 bf + printed, size - printed, &arg, val); 2099 } 2100 } else if (IS_ERR(sc->tp_format)) { 2101 /* 2102 * If we managed to read the tracepoint /format file, then we 2103 * may end up not having any args, like with gettid(), so only 2104 * print the raw args when we didn't manage to read it. 2105 */ 2106 while (arg.idx < sc->nr_args) { 2107 if (arg.mask & bit) 2108 goto next_arg; 2109 val = syscall_arg__val(&arg, arg.idx); 2110 if (printed) 2111 printed += scnprintf(bf + printed, size - printed, ", "); 2112 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg); 2113 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val); 2114 next_arg: 2115 ++arg.idx; 2116 bit <<= 1; 2117 } 2118 } 2119 2120 return printed; 2121 } 2122 2123 typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel, 2124 union perf_event *event, 2125 struct perf_sample *sample); 2126 2127 static struct syscall *trace__syscall_info(struct trace *trace, 2128 struct evsel *evsel, int id) 2129 { 2130 int err = 0; 2131 2132 if (id < 0) { 2133 2134 /* 2135 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried 2136 * before that, leaving at a higher verbosity level till that is 2137 * explained. Reproduced with plain ftrace with: 2138 * 2139 * echo 1 > /t/events/raw_syscalls/sys_exit/enable 2140 * grep "NR -1 " /t/trace_pipe 2141 * 2142 * After generating some load on the machine. 2143 */ 2144 if (verbose > 1) { 2145 static u64 n; 2146 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n", 2147 id, evsel__name(evsel), ++n); 2148 } 2149 return NULL; 2150 } 2151 2152 err = -EINVAL; 2153 2154 #ifdef HAVE_SYSCALL_TABLE_SUPPORT 2155 if (id > trace->sctbl->syscalls.max_id) { 2156 #else 2157 if (id >= trace->sctbl->syscalls.max_id) { 2158 /* 2159 * With libaudit we don't know beforehand what is the max_id, 2160 * so we let trace__read_syscall_info() figure that out as we 2161 * go on reading syscalls. 2162 */ 2163 err = trace__read_syscall_info(trace, id); 2164 if (err) 2165 #endif 2166 goto out_cant_read; 2167 } 2168 2169 if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) && 2170 (err = trace__read_syscall_info(trace, id)) != 0) 2171 goto out_cant_read; 2172 2173 if (trace->syscalls.table && trace->syscalls.table[id].nonexistent) 2174 goto out_cant_read; 2175 2176 return &trace->syscalls.table[id]; 2177 2178 out_cant_read: 2179 if (verbose > 0) { 2180 char sbuf[STRERR_BUFSIZE]; 2181 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf))); 2182 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL) 2183 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name); 2184 fputs(" information\n", trace->output); 2185 } 2186 return NULL; 2187 } 2188 2189 struct syscall_stats { 2190 struct stats stats; 2191 u64 nr_failures; 2192 int max_errno; 2193 u32 *errnos; 2194 }; 2195 2196 static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace, 2197 int id, struct perf_sample *sample, long err, bool errno_summary) 2198 { 2199 struct int_node *inode; 2200 struct syscall_stats *stats; 2201 u64 duration = 0; 2202 2203 inode = intlist__findnew(ttrace->syscall_stats, id); 2204 if (inode == NULL) 2205 return; 2206 2207 stats = inode->priv; 2208 if (stats == NULL) { 2209 stats = zalloc(sizeof(*stats)); 2210 if (stats == NULL) 2211 return; 2212 2213 init_stats(&stats->stats); 2214 inode->priv = stats; 2215 } 2216 2217 if (ttrace->entry_time && sample->time > ttrace->entry_time) 2218 duration = sample->time - ttrace->entry_time; 2219 2220 update_stats(&stats->stats, duration); 2221 2222 if (err < 0) { 2223 ++stats->nr_failures; 2224 2225 if (!errno_summary) 2226 return; 2227 2228 err = -err; 2229 if (err > stats->max_errno) { 2230 u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32)); 2231 2232 if (new_errnos) { 2233 memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32)); 2234 } else { 2235 pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n", 2236 thread__comm_str(thread), thread__pid(thread), 2237 thread__tid(thread)); 2238 return; 2239 } 2240 2241 stats->errnos = new_errnos; 2242 stats->max_errno = err; 2243 } 2244 2245 ++stats->errnos[err - 1]; 2246 } 2247 } 2248 2249 static int trace__printf_interrupted_entry(struct trace *trace) 2250 { 2251 struct thread_trace *ttrace; 2252 size_t printed; 2253 int len; 2254 2255 if (trace->failure_only || trace->current == NULL) 2256 return 0; 2257 2258 ttrace = thread__priv(trace->current); 2259 2260 if (!ttrace->entry_pending) 2261 return 0; 2262 2263 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output); 2264 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str); 2265 2266 if (len < trace->args_alignment - 4) 2267 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " "); 2268 2269 printed += fprintf(trace->output, " ...\n"); 2270 2271 ttrace->entry_pending = false; 2272 ++trace->nr_events_printed; 2273 2274 return printed; 2275 } 2276 2277 static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel, 2278 struct perf_sample *sample, struct thread *thread) 2279 { 2280 int printed = 0; 2281 2282 if (trace->print_sample) { 2283 double ts = (double)sample->time / NSEC_PER_MSEC; 2284 2285 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n", 2286 evsel__name(evsel), ts, 2287 thread__comm_str(thread), 2288 sample->pid, sample->tid, sample->cpu); 2289 } 2290 2291 return printed; 2292 } 2293 2294 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size) 2295 { 2296 void *augmented_args = NULL; 2297 /* 2298 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter 2299 * and there we get all 6 syscall args plus the tracepoint common fields 2300 * that gets calculated at the start and the syscall_nr (another long). 2301 * So we check if that is the case and if so don't look after the 2302 * sc->args_size but always after the full raw_syscalls:sys_enter payload, 2303 * which is fixed. 2304 * 2305 * We'll revisit this later to pass s->args_size to the BPF augmenter 2306 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it 2307 * copies only what we need for each syscall, like what happens when we 2308 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace 2309 * traffic to just what is needed for each syscall. 2310 */ 2311 int args_size = raw_augmented_args_size ?: sc->args_size; 2312 2313 *augmented_args_size = sample->raw_size - args_size; 2314 if (*augmented_args_size > 0) 2315 augmented_args = sample->raw_data + args_size; 2316 2317 return augmented_args; 2318 } 2319 2320 static void syscall__exit(struct syscall *sc) 2321 { 2322 if (!sc) 2323 return; 2324 2325 zfree(&sc->arg_fmt); 2326 } 2327 2328 static int trace__sys_enter(struct trace *trace, struct evsel *evsel, 2329 union perf_event *event __maybe_unused, 2330 struct perf_sample *sample) 2331 { 2332 char *msg; 2333 void *args; 2334 int printed = 0; 2335 struct thread *thread; 2336 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 2337 int augmented_args_size = 0; 2338 void *augmented_args = NULL; 2339 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2340 struct thread_trace *ttrace; 2341 2342 if (sc == NULL) 2343 return -1; 2344 2345 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2346 ttrace = thread__trace(thread, trace->output); 2347 if (ttrace == NULL) 2348 goto out_put; 2349 2350 trace__fprintf_sample(trace, evsel, sample, thread); 2351 2352 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 2353 2354 if (ttrace->entry_str == NULL) { 2355 ttrace->entry_str = malloc(trace__entry_str_size); 2356 if (!ttrace->entry_str) 2357 goto out_put; 2358 } 2359 2360 if (!(trace->duration_filter || trace->summary_only || trace->min_stack)) 2361 trace__printf_interrupted_entry(trace); 2362 /* 2363 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible 2364 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments 2365 * this breaks syscall__augmented_args() check for augmented args, as we calculate 2366 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file, 2367 * so when handling, say the openat syscall, we end up getting 6 args for the 2368 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly 2369 * thinking that the extra 2 u64 args are the augmented filename, so just check 2370 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one. 2371 */ 2372 if (evsel != trace->syscalls.events.sys_enter) 2373 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 2374 ttrace->entry_time = sample->time; 2375 msg = ttrace->entry_str; 2376 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name); 2377 2378 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed, 2379 args, augmented_args, augmented_args_size, trace, thread); 2380 2381 if (sc->is_exit) { 2382 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) { 2383 int alignment = 0; 2384 2385 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output); 2386 printed = fprintf(trace->output, "%s)", ttrace->entry_str); 2387 if (trace->args_alignment > printed) 2388 alignment = trace->args_alignment - printed; 2389 fprintf(trace->output, "%*s= ?\n", alignment, " "); 2390 } 2391 } else { 2392 ttrace->entry_pending = true; 2393 /* See trace__vfs_getname & trace__sys_exit */ 2394 ttrace->filename.pending_open = false; 2395 } 2396 2397 if (trace->current != thread) { 2398 thread__put(trace->current); 2399 trace->current = thread__get(thread); 2400 } 2401 err = 0; 2402 out_put: 2403 thread__put(thread); 2404 return err; 2405 } 2406 2407 static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel, 2408 struct perf_sample *sample) 2409 { 2410 struct thread_trace *ttrace; 2411 struct thread *thread; 2412 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 2413 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2414 char msg[1024]; 2415 void *args, *augmented_args = NULL; 2416 int augmented_args_size; 2417 2418 if (sc == NULL) 2419 return -1; 2420 2421 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2422 ttrace = thread__trace(thread, trace->output); 2423 /* 2424 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args() 2425 * and the rest of the beautifiers accessing it via struct syscall_arg touches it. 2426 */ 2427 if (ttrace == NULL) 2428 goto out_put; 2429 2430 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 2431 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 2432 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread); 2433 fprintf(trace->output, "%s", msg); 2434 err = 0; 2435 out_put: 2436 thread__put(thread); 2437 return err; 2438 } 2439 2440 static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel, 2441 struct perf_sample *sample, 2442 struct callchain_cursor *cursor) 2443 { 2444 struct addr_location al; 2445 int max_stack = evsel->core.attr.sample_max_stack ? 2446 evsel->core.attr.sample_max_stack : 2447 trace->max_stack; 2448 int err = -1; 2449 2450 addr_location__init(&al); 2451 if (machine__resolve(trace->host, &al, sample) < 0) 2452 goto out; 2453 2454 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack); 2455 out: 2456 addr_location__exit(&al); 2457 return err; 2458 } 2459 2460 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample) 2461 { 2462 /* TODO: user-configurable print_opts */ 2463 const unsigned int print_opts = EVSEL__PRINT_SYM | 2464 EVSEL__PRINT_DSO | 2465 EVSEL__PRINT_UNKNOWN_AS_ADDR; 2466 2467 return sample__fprintf_callchain(sample, 38, print_opts, get_tls_callchain_cursor(), symbol_conf.bt_stop_list, trace->output); 2468 } 2469 2470 static const char *errno_to_name(struct evsel *evsel, int err) 2471 { 2472 struct perf_env *env = evsel__env(evsel); 2473 2474 return perf_env__arch_strerrno(env, err); 2475 } 2476 2477 static int trace__sys_exit(struct trace *trace, struct evsel *evsel, 2478 union perf_event *event __maybe_unused, 2479 struct perf_sample *sample) 2480 { 2481 long ret; 2482 u64 duration = 0; 2483 bool duration_calculated = false; 2484 struct thread *thread; 2485 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0; 2486 int alignment = trace->args_alignment; 2487 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2488 struct thread_trace *ttrace; 2489 2490 if (sc == NULL) 2491 return -1; 2492 2493 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2494 ttrace = thread__trace(thread, trace->output); 2495 if (ttrace == NULL) 2496 goto out_put; 2497 2498 trace__fprintf_sample(trace, evsel, sample, thread); 2499 2500 ret = perf_evsel__sc_tp_uint(evsel, ret, sample); 2501 2502 if (trace->summary) 2503 thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary); 2504 2505 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) { 2506 trace__set_fd_pathname(thread, ret, ttrace->filename.name); 2507 ttrace->filename.pending_open = false; 2508 ++trace->stats.vfs_getname; 2509 } 2510 2511 if (ttrace->entry_time) { 2512 duration = sample->time - ttrace->entry_time; 2513 if (trace__filter_duration(trace, duration)) 2514 goto out; 2515 duration_calculated = true; 2516 } else if (trace->duration_filter) 2517 goto out; 2518 2519 if (sample->callchain) { 2520 struct callchain_cursor *cursor = get_tls_callchain_cursor(); 2521 2522 callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor); 2523 if (callchain_ret == 0) { 2524 if (cursor->nr < trace->min_stack) 2525 goto out; 2526 callchain_ret = 1; 2527 } 2528 } 2529 2530 if (trace->summary_only || (ret >= 0 && trace->failure_only)) 2531 goto out; 2532 2533 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output); 2534 2535 if (ttrace->entry_pending) { 2536 printed = fprintf(trace->output, "%s", ttrace->entry_str); 2537 } else { 2538 printed += fprintf(trace->output, " ... ["); 2539 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued"); 2540 printed += 9; 2541 printed += fprintf(trace->output, "]: %s()", sc->name); 2542 } 2543 2544 printed++; /* the closing ')' */ 2545 2546 if (alignment > printed) 2547 alignment -= printed; 2548 else 2549 alignment = 0; 2550 2551 fprintf(trace->output, ")%*s= ", alignment, " "); 2552 2553 if (sc->fmt == NULL) { 2554 if (ret < 0) 2555 goto errno_print; 2556 signed_print: 2557 fprintf(trace->output, "%ld", ret); 2558 } else if (ret < 0) { 2559 errno_print: { 2560 char bf[STRERR_BUFSIZE]; 2561 const char *emsg = str_error_r(-ret, bf, sizeof(bf)), 2562 *e = errno_to_name(evsel, -ret); 2563 2564 fprintf(trace->output, "-1 %s (%s)", e, emsg); 2565 } 2566 } else if (ret == 0 && sc->fmt->timeout) 2567 fprintf(trace->output, "0 (Timeout)"); 2568 else if (ttrace->ret_scnprintf) { 2569 char bf[1024]; 2570 struct syscall_arg arg = { 2571 .val = ret, 2572 .thread = thread, 2573 .trace = trace, 2574 }; 2575 ttrace->ret_scnprintf(bf, sizeof(bf), &arg); 2576 ttrace->ret_scnprintf = NULL; 2577 fprintf(trace->output, "%s", bf); 2578 } else if (sc->fmt->hexret) 2579 fprintf(trace->output, "%#lx", ret); 2580 else if (sc->fmt->errpid) { 2581 struct thread *child = machine__find_thread(trace->host, ret, ret); 2582 2583 if (child != NULL) { 2584 fprintf(trace->output, "%ld", ret); 2585 if (thread__comm_set(child)) 2586 fprintf(trace->output, " (%s)", thread__comm_str(child)); 2587 thread__put(child); 2588 } 2589 } else 2590 goto signed_print; 2591 2592 fputc('\n', trace->output); 2593 2594 /* 2595 * We only consider an 'event' for the sake of --max-events a non-filtered 2596 * sys_enter + sys_exit and other tracepoint events. 2597 */ 2598 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX) 2599 interrupted = true; 2600 2601 if (callchain_ret > 0) 2602 trace__fprintf_callchain(trace, sample); 2603 else if (callchain_ret < 0) 2604 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); 2605 out: 2606 ttrace->entry_pending = false; 2607 err = 0; 2608 out_put: 2609 thread__put(thread); 2610 return err; 2611 } 2612 2613 static int trace__vfs_getname(struct trace *trace, struct evsel *evsel, 2614 union perf_event *event __maybe_unused, 2615 struct perf_sample *sample) 2616 { 2617 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2618 struct thread_trace *ttrace; 2619 size_t filename_len, entry_str_len, to_move; 2620 ssize_t remaining_space; 2621 char *pos; 2622 const char *filename = evsel__rawptr(evsel, sample, "pathname"); 2623 2624 if (!thread) 2625 goto out; 2626 2627 ttrace = thread__priv(thread); 2628 if (!ttrace) 2629 goto out_put; 2630 2631 filename_len = strlen(filename); 2632 if (filename_len == 0) 2633 goto out_put; 2634 2635 if (ttrace->filename.namelen < filename_len) { 2636 char *f = realloc(ttrace->filename.name, filename_len + 1); 2637 2638 if (f == NULL) 2639 goto out_put; 2640 2641 ttrace->filename.namelen = filename_len; 2642 ttrace->filename.name = f; 2643 } 2644 2645 strcpy(ttrace->filename.name, filename); 2646 ttrace->filename.pending_open = true; 2647 2648 if (!ttrace->filename.ptr) 2649 goto out_put; 2650 2651 entry_str_len = strlen(ttrace->entry_str); 2652 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */ 2653 if (remaining_space <= 0) 2654 goto out_put; 2655 2656 if (filename_len > (size_t)remaining_space) { 2657 filename += filename_len - remaining_space; 2658 filename_len = remaining_space; 2659 } 2660 2661 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */ 2662 pos = ttrace->entry_str + ttrace->filename.entry_str_pos; 2663 memmove(pos + filename_len, pos, to_move); 2664 memcpy(pos, filename, filename_len); 2665 2666 ttrace->filename.ptr = 0; 2667 ttrace->filename.entry_str_pos = 0; 2668 out_put: 2669 thread__put(thread); 2670 out: 2671 return 0; 2672 } 2673 2674 static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel, 2675 union perf_event *event __maybe_unused, 2676 struct perf_sample *sample) 2677 { 2678 u64 runtime = evsel__intval(evsel, sample, "runtime"); 2679 double runtime_ms = (double)runtime / NSEC_PER_MSEC; 2680 struct thread *thread = machine__findnew_thread(trace->host, 2681 sample->pid, 2682 sample->tid); 2683 struct thread_trace *ttrace = thread__trace(thread, trace->output); 2684 2685 if (ttrace == NULL) 2686 goto out_dump; 2687 2688 ttrace->runtime_ms += runtime_ms; 2689 trace->runtime_ms += runtime_ms; 2690 out_put: 2691 thread__put(thread); 2692 return 0; 2693 2694 out_dump: 2695 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n", 2696 evsel->name, 2697 evsel__strval(evsel, sample, "comm"), 2698 (pid_t)evsel__intval(evsel, sample, "pid"), 2699 runtime, 2700 evsel__intval(evsel, sample, "vruntime")); 2701 goto out_put; 2702 } 2703 2704 static int bpf_output__printer(enum binary_printer_ops op, 2705 unsigned int val, void *extra __maybe_unused, FILE *fp) 2706 { 2707 unsigned char ch = (unsigned char)val; 2708 2709 switch (op) { 2710 case BINARY_PRINT_CHAR_DATA: 2711 return fprintf(fp, "%c", isprint(ch) ? ch : '.'); 2712 case BINARY_PRINT_DATA_BEGIN: 2713 case BINARY_PRINT_LINE_BEGIN: 2714 case BINARY_PRINT_ADDR: 2715 case BINARY_PRINT_NUM_DATA: 2716 case BINARY_PRINT_NUM_PAD: 2717 case BINARY_PRINT_SEP: 2718 case BINARY_PRINT_CHAR_PAD: 2719 case BINARY_PRINT_LINE_END: 2720 case BINARY_PRINT_DATA_END: 2721 default: 2722 break; 2723 } 2724 2725 return 0; 2726 } 2727 2728 static void bpf_output__fprintf(struct trace *trace, 2729 struct perf_sample *sample) 2730 { 2731 binary__fprintf(sample->raw_data, sample->raw_size, 8, 2732 bpf_output__printer, NULL, trace->output); 2733 ++trace->nr_events_printed; 2734 } 2735 2736 static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample, 2737 struct thread *thread, void *augmented_args, int augmented_args_size) 2738 { 2739 char bf[2048]; 2740 size_t size = sizeof(bf); 2741 struct tep_format_field *field = evsel->tp_format->format.fields; 2742 struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel); 2743 size_t printed = 0; 2744 unsigned long val; 2745 u8 bit = 1; 2746 struct syscall_arg syscall_arg = { 2747 .augmented = { 2748 .size = augmented_args_size, 2749 .args = augmented_args, 2750 }, 2751 .idx = 0, 2752 .mask = 0, 2753 .trace = trace, 2754 .thread = thread, 2755 .show_string_prefix = trace->show_string_prefix, 2756 }; 2757 2758 for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) { 2759 if (syscall_arg.mask & bit) 2760 continue; 2761 2762 syscall_arg.len = 0; 2763 syscall_arg.fmt = arg; 2764 if (field->flags & TEP_FIELD_IS_ARRAY) { 2765 int offset = field->offset; 2766 2767 if (field->flags & TEP_FIELD_IS_DYNAMIC) { 2768 offset = format_field__intval(field, sample, evsel->needs_swap); 2769 syscall_arg.len = offset >> 16; 2770 offset &= 0xffff; 2771 if (tep_field_is_relative(field->flags)) 2772 offset += field->offset + field->size; 2773 } 2774 2775 val = (uintptr_t)(sample->raw_data + offset); 2776 } else 2777 val = format_field__intval(field, sample, evsel->needs_swap); 2778 /* 2779 * Some syscall args need some mask, most don't and 2780 * return val untouched. 2781 */ 2782 val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val); 2783 2784 /* 2785 * Suppress this argument if its value is zero and 2786 * we don't have a string associated in an 2787 * strarray for it. 2788 */ 2789 if (val == 0 && 2790 !trace->show_zeros && 2791 !((arg->show_zero || 2792 arg->scnprintf == SCA_STRARRAY || 2793 arg->scnprintf == SCA_STRARRAYS) && 2794 arg->parm)) 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@", map__dso(al->map)->long_name); 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 int id; 3358 3359 /* 3360 * We're only interested in syscalls that have a pointer: 3361 */ 3362 for (field = sc->args; field; field = field->next) { 3363 if (field->flags & TEP_FIELD_IS_POINTER) 3364 goto try_to_find_pair; 3365 } 3366 3367 return NULL; 3368 3369 try_to_find_pair: 3370 for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) { 3371 struct syscall *pair = trace__syscall_info(trace, NULL, id); 3372 struct bpf_program *pair_prog; 3373 bool is_candidate = false; 3374 3375 if (pair == NULL || pair == sc || 3376 pair->bpf_prog.sys_enter == trace->skel->progs.syscall_unaugmented) 3377 continue; 3378 3379 for (field = sc->args, candidate_field = pair->args; 3380 field && candidate_field; field = field->next, candidate_field = candidate_field->next) { 3381 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER, 3382 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER; 3383 3384 if (is_pointer) { 3385 if (!candidate_is_pointer) { 3386 // The candidate just doesn't copies our pointer arg, might copy other pointers we want. 3387 continue; 3388 } 3389 } else { 3390 if (candidate_is_pointer) { 3391 // The candidate might copy a pointer we don't have, skip it. 3392 goto next_candidate; 3393 } 3394 continue; 3395 } 3396 3397 if (strcmp(field->type, candidate_field->type)) 3398 goto next_candidate; 3399 3400 /* 3401 * This is limited in the BPF program but sys_write 3402 * uses "const char *" for its "buf" arg so we need to 3403 * use some heuristic that is kinda future proof... 3404 */ 3405 if (strcmp(field->type, "const char *") == 0 && 3406 !(strstr(field->name, "name") || 3407 strstr(field->name, "path") || 3408 strstr(field->name, "file") || 3409 strstr(field->name, "root") || 3410 strstr(field->name, "description"))) 3411 goto next_candidate; 3412 3413 is_candidate = true; 3414 } 3415 3416 if (!is_candidate) 3417 goto next_candidate; 3418 3419 /* 3420 * Check if the tentative pair syscall augmenter has more pointers, if it has, 3421 * then it may be collecting that and we then can't use it, as it would collect 3422 * more than what is common to the two syscalls. 3423 */ 3424 if (candidate_field) { 3425 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next) 3426 if (candidate_field->flags & TEP_FIELD_IS_POINTER) 3427 goto next_candidate; 3428 } 3429 3430 pair_prog = pair->bpf_prog.sys_enter; 3431 /* 3432 * If the pair isn't enabled, then its bpf_prog.sys_enter will not 3433 * have been searched for, so search it here and if it returns the 3434 * unaugmented one, then ignore it, otherwise we'll reuse that BPF 3435 * program for a filtered syscall on a non-filtered one. 3436 * 3437 * For instance, we have "!syscalls:sys_enter_renameat" and that is 3438 * useful for "renameat2". 3439 */ 3440 if (pair_prog == NULL) { 3441 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter"); 3442 if (pair_prog == trace->skel->progs.syscall_unaugmented) 3443 goto next_candidate; 3444 } 3445 3446 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name); 3447 return pair_prog; 3448 next_candidate: 3449 continue; 3450 } 3451 3452 return NULL; 3453 } 3454 3455 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace) 3456 { 3457 int map_enter_fd = bpf_map__fd(trace->skel->maps.syscalls_sys_enter); 3458 int map_exit_fd = bpf_map__fd(trace->skel->maps.syscalls_sys_exit); 3459 int err = 0, key; 3460 3461 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 3462 int prog_fd; 3463 3464 if (!trace__syscall_enabled(trace, key)) 3465 continue; 3466 3467 trace__init_syscall_bpf_progs(trace, key); 3468 3469 // It'll get at least the "!raw_syscalls:unaugmented" 3470 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key); 3471 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY); 3472 if (err) 3473 break; 3474 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key); 3475 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY); 3476 if (err) 3477 break; 3478 } 3479 3480 /* 3481 * Now lets do a second pass looking for enabled syscalls without 3482 * an augmenter that have a signature that is a superset of another 3483 * syscall with an augmenter so that we can auto-reuse it. 3484 * 3485 * I.e. if we have an augmenter for the "open" syscall that has 3486 * this signature: 3487 * 3488 * int open(const char *pathname, int flags, mode_t mode); 3489 * 3490 * I.e. that will collect just the first string argument, then we 3491 * can reuse it for the 'creat' syscall, that has this signature: 3492 * 3493 * int creat(const char *pathname, mode_t mode); 3494 * 3495 * and for: 3496 * 3497 * int stat(const char *pathname, struct stat *statbuf); 3498 * int lstat(const char *pathname, struct stat *statbuf); 3499 * 3500 * Because the 'open' augmenter will collect the first arg as a string, 3501 * and leave alone all the other args, which already helps with 3502 * beautifying 'stat' and 'lstat''s pathname arg. 3503 * 3504 * Then, in time, when 'stat' gets an augmenter that collects both 3505 * first and second arg (this one on the raw_syscalls:sys_exit prog 3506 * array tail call, then that one will be used. 3507 */ 3508 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 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 DEFINE_RESORT_RB(threads, 4316 (thread__nr_events(thread__priv(a->thread)) < 4317 thread__nr_events(thread__priv(b->thread))), 4318 struct thread *thread; 4319 ) 4320 { 4321 entry->thread = rb_entry(nd, struct thread_rb_node, rb_node)->thread; 4322 } 4323 4324 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp) 4325 { 4326 size_t printed = trace__fprintf_threads_header(fp); 4327 struct rb_node *nd; 4328 int i; 4329 4330 for (i = 0; i < THREADS__TABLE_SIZE; i++) { 4331 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i); 4332 4333 if (threads == NULL) { 4334 fprintf(fp, "%s", "Error sorting output by nr_events!\n"); 4335 return 0; 4336 } 4337 4338 resort_rb__for_each_entry(nd, threads) 4339 printed += trace__fprintf_thread(fp, threads_entry->thread, trace); 4340 4341 resort_rb__delete(threads); 4342 } 4343 return printed; 4344 } 4345 4346 static int trace__set_duration(const struct option *opt, const char *str, 4347 int unset __maybe_unused) 4348 { 4349 struct trace *trace = opt->value; 4350 4351 trace->duration_filter = atof(str); 4352 return 0; 4353 } 4354 4355 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str, 4356 int unset __maybe_unused) 4357 { 4358 int ret = -1; 4359 size_t i; 4360 struct trace *trace = opt->value; 4361 /* 4362 * FIXME: introduce a intarray class, plain parse csv and create a 4363 * { int nr, int entries[] } struct... 4364 */ 4365 struct intlist *list = intlist__new(str); 4366 4367 if (list == NULL) 4368 return -1; 4369 4370 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1; 4371 trace->filter_pids.entries = calloc(i, sizeof(pid_t)); 4372 4373 if (trace->filter_pids.entries == NULL) 4374 goto out; 4375 4376 trace->filter_pids.entries[0] = getpid(); 4377 4378 for (i = 1; i < trace->filter_pids.nr; ++i) 4379 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i; 4380 4381 intlist__delete(list); 4382 ret = 0; 4383 out: 4384 return ret; 4385 } 4386 4387 static int trace__open_output(struct trace *trace, const char *filename) 4388 { 4389 struct stat st; 4390 4391 if (!stat(filename, &st) && st.st_size) { 4392 char oldname[PATH_MAX]; 4393 4394 scnprintf(oldname, sizeof(oldname), "%s.old", filename); 4395 unlink(oldname); 4396 rename(filename, oldname); 4397 } 4398 4399 trace->output = fopen(filename, "w"); 4400 4401 return trace->output == NULL ? -errno : 0; 4402 } 4403 4404 static int parse_pagefaults(const struct option *opt, const char *str, 4405 int unset __maybe_unused) 4406 { 4407 int *trace_pgfaults = opt->value; 4408 4409 if (strcmp(str, "all") == 0) 4410 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN; 4411 else if (strcmp(str, "maj") == 0) 4412 *trace_pgfaults |= TRACE_PFMAJ; 4413 else if (strcmp(str, "min") == 0) 4414 *trace_pgfaults |= TRACE_PFMIN; 4415 else 4416 return -1; 4417 4418 return 0; 4419 } 4420 4421 static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler) 4422 { 4423 struct evsel *evsel; 4424 4425 evlist__for_each_entry(evlist, evsel) { 4426 if (evsel->handler == NULL) 4427 evsel->handler = handler; 4428 } 4429 } 4430 4431 static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name) 4432 { 4433 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel); 4434 4435 if (fmt) { 4436 const struct syscall_fmt *scfmt = syscall_fmt__find(name); 4437 4438 if (scfmt) { 4439 int skip = 0; 4440 4441 if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 || 4442 strcmp(evsel->tp_format->format.fields->name, "nr") == 0) 4443 ++skip; 4444 4445 memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt)); 4446 } 4447 } 4448 } 4449 4450 static int evlist__set_syscall_tp_fields(struct evlist *evlist) 4451 { 4452 struct evsel *evsel; 4453 4454 evlist__for_each_entry(evlist, evsel) { 4455 if (evsel->priv || !evsel->tp_format) 4456 continue; 4457 4458 if (strcmp(evsel->tp_format->system, "syscalls")) { 4459 evsel__init_tp_arg_scnprintf(evsel); 4460 continue; 4461 } 4462 4463 if (evsel__init_syscall_tp(evsel)) 4464 return -1; 4465 4466 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) { 4467 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 4468 4469 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64))) 4470 return -1; 4471 4472 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1); 4473 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) { 4474 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 4475 4476 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap)) 4477 return -1; 4478 4479 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1); 4480 } 4481 } 4482 4483 return 0; 4484 } 4485 4486 /* 4487 * XXX: Hackish, just splitting the combined -e+--event (syscalls 4488 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use 4489 * existing facilities unchanged (trace->ev_qualifier + parse_options()). 4490 * 4491 * It'd be better to introduce a parse_options() variant that would return a 4492 * list with the terms it didn't match to an event... 4493 */ 4494 static int trace__parse_events_option(const struct option *opt, const char *str, 4495 int unset __maybe_unused) 4496 { 4497 struct trace *trace = (struct trace *)opt->value; 4498 const char *s = str; 4499 char *sep = NULL, *lists[2] = { NULL, NULL, }; 4500 int len = strlen(str) + 1, err = -1, list, idx; 4501 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR); 4502 char group_name[PATH_MAX]; 4503 const struct syscall_fmt *fmt; 4504 4505 if (strace_groups_dir == NULL) 4506 return -1; 4507 4508 if (*s == '!') { 4509 ++s; 4510 trace->not_ev_qualifier = true; 4511 } 4512 4513 while (1) { 4514 if ((sep = strchr(s, ',')) != NULL) 4515 *sep = '\0'; 4516 4517 list = 0; 4518 if (syscalltbl__id(trace->sctbl, s) >= 0 || 4519 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) { 4520 list = 1; 4521 goto do_concat; 4522 } 4523 4524 fmt = syscall_fmt__find_by_alias(s); 4525 if (fmt != NULL) { 4526 list = 1; 4527 s = fmt->name; 4528 } else { 4529 path__join(group_name, sizeof(group_name), strace_groups_dir, s); 4530 if (access(group_name, R_OK) == 0) 4531 list = 1; 4532 } 4533 do_concat: 4534 if (lists[list]) { 4535 sprintf(lists[list] + strlen(lists[list]), ",%s", s); 4536 } else { 4537 lists[list] = malloc(len); 4538 if (lists[list] == NULL) 4539 goto out; 4540 strcpy(lists[list], s); 4541 } 4542 4543 if (!sep) 4544 break; 4545 4546 *sep = ','; 4547 s = sep + 1; 4548 } 4549 4550 if (lists[1] != NULL) { 4551 struct strlist_config slist_config = { 4552 .dirname = strace_groups_dir, 4553 }; 4554 4555 trace->ev_qualifier = strlist__new(lists[1], &slist_config); 4556 if (trace->ev_qualifier == NULL) { 4557 fputs("Not enough memory to parse event qualifier", trace->output); 4558 goto out; 4559 } 4560 4561 if (trace__validate_ev_qualifier(trace)) 4562 goto out; 4563 trace->trace_syscalls = true; 4564 } 4565 4566 err = 0; 4567 4568 if (lists[0]) { 4569 struct parse_events_option_args parse_events_option_args = { 4570 .evlistp = &trace->evlist, 4571 }; 4572 struct option o = { 4573 .value = &parse_events_option_args, 4574 }; 4575 err = parse_events_option(&o, lists[0], 0); 4576 } 4577 out: 4578 free(strace_groups_dir); 4579 free(lists[0]); 4580 free(lists[1]); 4581 if (sep) 4582 *sep = ','; 4583 4584 return err; 4585 } 4586 4587 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset) 4588 { 4589 struct trace *trace = opt->value; 4590 4591 if (!list_empty(&trace->evlist->core.entries)) { 4592 struct option o = { 4593 .value = &trace->evlist, 4594 }; 4595 return parse_cgroups(&o, str, unset); 4596 } 4597 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str); 4598 4599 return 0; 4600 } 4601 4602 static int trace__config(const char *var, const char *value, void *arg) 4603 { 4604 struct trace *trace = arg; 4605 int err = 0; 4606 4607 if (!strcmp(var, "trace.add_events")) { 4608 trace->perfconfig_events = strdup(value); 4609 if (trace->perfconfig_events == NULL) { 4610 pr_err("Not enough memory for %s\n", "trace.add_events"); 4611 return -1; 4612 } 4613 } else if (!strcmp(var, "trace.show_timestamp")) { 4614 trace->show_tstamp = perf_config_bool(var, value); 4615 } else if (!strcmp(var, "trace.show_duration")) { 4616 trace->show_duration = perf_config_bool(var, value); 4617 } else if (!strcmp(var, "trace.show_arg_names")) { 4618 trace->show_arg_names = perf_config_bool(var, value); 4619 if (!trace->show_arg_names) 4620 trace->show_zeros = true; 4621 } else if (!strcmp(var, "trace.show_zeros")) { 4622 bool new_show_zeros = perf_config_bool(var, value); 4623 if (!trace->show_arg_names && !new_show_zeros) { 4624 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n"); 4625 goto out; 4626 } 4627 trace->show_zeros = new_show_zeros; 4628 } else if (!strcmp(var, "trace.show_prefix")) { 4629 trace->show_string_prefix = perf_config_bool(var, value); 4630 } else if (!strcmp(var, "trace.no_inherit")) { 4631 trace->opts.no_inherit = perf_config_bool(var, value); 4632 } else if (!strcmp(var, "trace.args_alignment")) { 4633 int args_alignment = 0; 4634 if (perf_config_int(&args_alignment, var, value) == 0) 4635 trace->args_alignment = args_alignment; 4636 } else if (!strcmp(var, "trace.tracepoint_beautifiers")) { 4637 if (strcasecmp(value, "libtraceevent") == 0) 4638 trace->libtraceevent_print = true; 4639 else if (strcasecmp(value, "libbeauty") == 0) 4640 trace->libtraceevent_print = false; 4641 } 4642 out: 4643 return err; 4644 } 4645 4646 static void trace__exit(struct trace *trace) 4647 { 4648 int i; 4649 4650 strlist__delete(trace->ev_qualifier); 4651 zfree(&trace->ev_qualifier_ids.entries); 4652 if (trace->syscalls.table) { 4653 for (i = 0; i <= trace->sctbl->syscalls.max_id; i++) 4654 syscall__exit(&trace->syscalls.table[i]); 4655 zfree(&trace->syscalls.table); 4656 } 4657 syscalltbl__delete(trace->sctbl); 4658 zfree(&trace->perfconfig_events); 4659 } 4660 4661 #ifdef HAVE_BPF_SKEL 4662 static int bpf__setup_bpf_output(struct evlist *evlist) 4663 { 4664 int err = parse_event(evlist, "bpf-output/no-inherit=1,name=__augmented_syscalls__/"); 4665 4666 if (err) 4667 pr_debug("ERROR: failed to create the \"__augmented_syscalls__\" bpf-output event\n"); 4668 4669 return err; 4670 } 4671 #endif 4672 4673 int cmd_trace(int argc, const char **argv) 4674 { 4675 const char *trace_usage[] = { 4676 "perf trace [<options>] [<command>]", 4677 "perf trace [<options>] -- <command> [<options>]", 4678 "perf trace record [<options>] [<command>]", 4679 "perf trace record [<options>] -- <command> [<options>]", 4680 NULL 4681 }; 4682 struct trace trace = { 4683 .opts = { 4684 .target = { 4685 .uid = UINT_MAX, 4686 .uses_mmap = true, 4687 }, 4688 .user_freq = UINT_MAX, 4689 .user_interval = ULLONG_MAX, 4690 .no_buffering = true, 4691 .mmap_pages = UINT_MAX, 4692 }, 4693 .output = stderr, 4694 .show_comm = true, 4695 .show_tstamp = true, 4696 .show_duration = true, 4697 .show_arg_names = true, 4698 .args_alignment = 70, 4699 .trace_syscalls = false, 4700 .kernel_syscallchains = false, 4701 .max_stack = UINT_MAX, 4702 .max_events = ULONG_MAX, 4703 }; 4704 const char *output_name = NULL; 4705 const struct option trace_options[] = { 4706 OPT_CALLBACK('e', "event", &trace, "event", 4707 "event/syscall selector. use 'perf list' to list available events", 4708 trace__parse_events_option), 4709 OPT_CALLBACK(0, "filter", &trace.evlist, "filter", 4710 "event filter", parse_filter), 4711 OPT_BOOLEAN(0, "comm", &trace.show_comm, 4712 "show the thread COMM next to its id"), 4713 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"), 4714 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace", 4715 trace__parse_events_option), 4716 OPT_STRING('o', "output", &output_name, "file", "output file name"), 4717 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"), 4718 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid", 4719 "trace events on existing process id"), 4720 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid", 4721 "trace events on existing thread id"), 4722 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids", 4723 "pids to filter (by the kernel)", trace__set_filter_pids_from_option), 4724 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide, 4725 "system-wide collection from all CPUs"), 4726 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu", 4727 "list of cpus to monitor"), 4728 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit, 4729 "child tasks do not inherit counters"), 4730 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages", 4731 "number of mmap data pages", evlist__parse_mmap_pages), 4732 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user", 4733 "user to profile"), 4734 OPT_CALLBACK(0, "duration", &trace, "float", 4735 "show only events with duration > N.M ms", 4736 trace__set_duration), 4737 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"), 4738 OPT_INCR('v', "verbose", &verbose, "be more verbose"), 4739 OPT_BOOLEAN('T', "time", &trace.full_time, 4740 "Show full timestamp, not time relative to first start"), 4741 OPT_BOOLEAN(0, "failure", &trace.failure_only, 4742 "Show only syscalls that failed"), 4743 OPT_BOOLEAN('s', "summary", &trace.summary_only, 4744 "Show only syscall summary with statistics"), 4745 OPT_BOOLEAN('S', "with-summary", &trace.summary, 4746 "Show all syscalls and summary with statistics"), 4747 OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary, 4748 "Show errno stats per syscall, use with -s or -S"), 4749 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min", 4750 "Trace pagefaults", parse_pagefaults, "maj"), 4751 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"), 4752 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"), 4753 OPT_CALLBACK(0, "call-graph", &trace.opts, 4754 "record_mode[,record_size]", record_callchain_help, 4755 &record_parse_callchain_opt), 4756 OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print, 4757 "Use libtraceevent to print the tracepoint arguments."), 4758 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains, 4759 "Show the kernel callchains on the syscall exit path"), 4760 OPT_ULONG(0, "max-events", &trace.max_events, 4761 "Set the maximum number of events to print, exit after that is reached. "), 4762 OPT_UINTEGER(0, "min-stack", &trace.min_stack, 4763 "Set the minimum stack depth when parsing the callchain, " 4764 "anything below the specified depth will be ignored."), 4765 OPT_UINTEGER(0, "max-stack", &trace.max_stack, 4766 "Set the maximum stack depth when parsing the callchain, " 4767 "anything beyond the specified depth will be ignored. " 4768 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)), 4769 OPT_BOOLEAN(0, "sort-events", &trace.sort_events, 4770 "Sort batch of events before processing, use if getting out of order events"), 4771 OPT_BOOLEAN(0, "print-sample", &trace.print_sample, 4772 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"), 4773 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, 4774 "per thread proc mmap processing timeout in ms"), 4775 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only", 4776 trace__parse_cgroups), 4777 OPT_INTEGER('D', "delay", &trace.opts.target.initial_delay, 4778 "ms to wait before starting measurement after program " 4779 "start"), 4780 OPTS_EVSWITCH(&trace.evswitch), 4781 OPT_END() 4782 }; 4783 bool __maybe_unused max_stack_user_set = true; 4784 bool mmap_pages_user_set = true; 4785 struct evsel *evsel; 4786 const char * const trace_subcommands[] = { "record", NULL }; 4787 int err = -1; 4788 char bf[BUFSIZ]; 4789 struct sigaction sigchld_act; 4790 4791 signal(SIGSEGV, sighandler_dump_stack); 4792 signal(SIGFPE, sighandler_dump_stack); 4793 signal(SIGINT, sighandler_interrupt); 4794 4795 memset(&sigchld_act, 0, sizeof(sigchld_act)); 4796 sigchld_act.sa_flags = SA_SIGINFO; 4797 sigchld_act.sa_sigaction = sighandler_chld; 4798 sigaction(SIGCHLD, &sigchld_act, NULL); 4799 4800 trace.evlist = evlist__new(); 4801 trace.sctbl = syscalltbl__new(); 4802 4803 if (trace.evlist == NULL || trace.sctbl == NULL) { 4804 pr_err("Not enough memory to run!\n"); 4805 err = -ENOMEM; 4806 goto out; 4807 } 4808 4809 /* 4810 * Parsing .perfconfig may entail creating a BPF event, that may need 4811 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting 4812 * is too small. This affects just this process, not touching the 4813 * global setting. If it fails we'll get something in 'perf trace -v' 4814 * to help diagnose the problem. 4815 */ 4816 rlimit__bump_memlock(); 4817 4818 err = perf_config(trace__config, &trace); 4819 if (err) 4820 goto out; 4821 4822 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands, 4823 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION); 4824 4825 /* 4826 * Here we already passed thru trace__parse_events_option() and it has 4827 * already figured out if -e syscall_name, if not but if --event 4828 * foo:bar was used, the user is interested _just_ in those, say, 4829 * tracepoint events, not in the strace-like syscall-name-based mode. 4830 * 4831 * This is important because we need to check if strace-like mode is 4832 * needed to decided if we should filter out the eBPF 4833 * __augmented_syscalls__ code, if it is in the mix, say, via 4834 * .perfconfig trace.add_events, and filter those out. 4835 */ 4836 if (!trace.trace_syscalls && !trace.trace_pgfaults && 4837 trace.evlist->core.nr_entries == 0 /* Was --events used? */) { 4838 trace.trace_syscalls = true; 4839 } 4840 /* 4841 * Now that we have --verbose figured out, lets see if we need to parse 4842 * events from .perfconfig, so that if those events fail parsing, say some 4843 * BPF program fails, then we'll be able to use --verbose to see what went 4844 * wrong in more detail. 4845 */ 4846 if (trace.perfconfig_events != NULL) { 4847 struct parse_events_error parse_err; 4848 4849 parse_events_error__init(&parse_err); 4850 err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err); 4851 if (err) 4852 parse_events_error__print(&parse_err, trace.perfconfig_events); 4853 parse_events_error__exit(&parse_err); 4854 if (err) 4855 goto out; 4856 } 4857 4858 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) { 4859 usage_with_options_msg(trace_usage, trace_options, 4860 "cgroup monitoring only available in system-wide mode"); 4861 } 4862 4863 #ifdef HAVE_BPF_SKEL 4864 if (!trace.trace_syscalls) 4865 goto skip_augmentation; 4866 4867 trace.skel = augmented_raw_syscalls_bpf__open(); 4868 if (!trace.skel) { 4869 pr_debug("Failed to open augmented syscalls BPF skeleton"); 4870 } else { 4871 /* 4872 * Disable attaching the BPF programs except for sys_enter and 4873 * sys_exit that tail call into this as necessary. 4874 */ 4875 struct bpf_program *prog; 4876 4877 bpf_object__for_each_program(prog, trace.skel->obj) { 4878 if (prog != trace.skel->progs.sys_enter && prog != trace.skel->progs.sys_exit) 4879 bpf_program__set_autoattach(prog, /*autoattach=*/false); 4880 } 4881 4882 err = augmented_raw_syscalls_bpf__load(trace.skel); 4883 4884 if (err < 0) { 4885 libbpf_strerror(err, bf, sizeof(bf)); 4886 pr_debug("Failed to load augmented syscalls BPF skeleton: %s\n", bf); 4887 } else { 4888 augmented_raw_syscalls_bpf__attach(trace.skel); 4889 trace__add_syscall_newtp(&trace); 4890 } 4891 } 4892 4893 err = bpf__setup_bpf_output(trace.evlist); 4894 if (err) { 4895 libbpf_strerror(err, bf, sizeof(bf)); 4896 pr_err("ERROR: Setup BPF output event failed: %s\n", bf); 4897 goto out; 4898 } 4899 trace.syscalls.events.bpf_output = evlist__last(trace.evlist); 4900 assert(!strcmp(evsel__name(trace.syscalls.events.bpf_output), "__augmented_syscalls__")); 4901 skip_augmentation: 4902 #endif 4903 err = -1; 4904 4905 if (trace.trace_pgfaults) { 4906 trace.opts.sample_address = true; 4907 trace.opts.sample_time = true; 4908 } 4909 4910 if (trace.opts.mmap_pages == UINT_MAX) 4911 mmap_pages_user_set = false; 4912 4913 if (trace.max_stack == UINT_MAX) { 4914 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack(); 4915 max_stack_user_set = false; 4916 } 4917 4918 #ifdef HAVE_DWARF_UNWIND_SUPPORT 4919 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) { 4920 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false); 4921 } 4922 #endif 4923 4924 if (callchain_param.enabled) { 4925 if (!mmap_pages_user_set && geteuid() == 0) 4926 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4; 4927 4928 symbol_conf.use_callchain = true; 4929 } 4930 4931 if (trace.evlist->core.nr_entries > 0) { 4932 evlist__set_default_evsel_handler(trace.evlist, trace__event_handler); 4933 if (evlist__set_syscall_tp_fields(trace.evlist)) { 4934 perror("failed to set syscalls:* tracepoint fields"); 4935 goto out; 4936 } 4937 } 4938 4939 if (trace.sort_events) { 4940 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace); 4941 ordered_events__set_copy_on_queue(&trace.oe.data, true); 4942 } 4943 4944 /* 4945 * If we are augmenting syscalls, then combine what we put in the 4946 * __augmented_syscalls__ BPF map with what is in the 4947 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF, 4948 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit. 4949 * 4950 * We'll switch to look at two BPF maps, one for sys_enter and the 4951 * other for sys_exit when we start augmenting the sys_exit paths with 4952 * buffers that are being copied from kernel to userspace, think 'read' 4953 * syscall. 4954 */ 4955 if (trace.syscalls.events.bpf_output) { 4956 evlist__for_each_entry(trace.evlist, evsel) { 4957 bool raw_syscalls_sys_exit = strcmp(evsel__name(evsel), "raw_syscalls:sys_exit") == 0; 4958 4959 if (raw_syscalls_sys_exit) { 4960 trace.raw_augmented_syscalls = true; 4961 goto init_augmented_syscall_tp; 4962 } 4963 4964 if (trace.syscalls.events.bpf_output->priv == NULL && 4965 strstr(evsel__name(evsel), "syscalls:sys_enter")) { 4966 struct evsel *augmented = trace.syscalls.events.bpf_output; 4967 if (evsel__init_augmented_syscall_tp(augmented, evsel) || 4968 evsel__init_augmented_syscall_tp_args(augmented)) 4969 goto out; 4970 /* 4971 * Augmented is __augmented_syscalls__ BPF_OUTPUT event 4972 * Above we made sure we can get from the payload the tp fields 4973 * that we get from syscalls:sys_enter tracefs format file. 4974 */ 4975 augmented->handler = trace__sys_enter; 4976 /* 4977 * Now we do the same for the *syscalls:sys_enter event so that 4978 * if we handle it directly, i.e. if the BPF prog returns 0 so 4979 * as not to filter it, then we'll handle it just like we would 4980 * for the BPF_OUTPUT one: 4981 */ 4982 if (evsel__init_augmented_syscall_tp(evsel, evsel) || 4983 evsel__init_augmented_syscall_tp_args(evsel)) 4984 goto out; 4985 evsel->handler = trace__sys_enter; 4986 } 4987 4988 if (strstarts(evsel__name(evsel), "syscalls:sys_exit_")) { 4989 struct syscall_tp *sc; 4990 init_augmented_syscall_tp: 4991 if (evsel__init_augmented_syscall_tp(evsel, evsel)) 4992 goto out; 4993 sc = __evsel__syscall_tp(evsel); 4994 /* 4995 * For now with BPF raw_augmented we hook into 4996 * raw_syscalls:sys_enter and there we get all 4997 * 6 syscall args plus the tracepoint common 4998 * fields and the syscall_nr (another long). 4999 * So we check if that is the case and if so 5000 * don't look after the sc->args_size but 5001 * always after the full raw_syscalls:sys_enter 5002 * payload, which is fixed. 5003 * 5004 * We'll revisit this later to pass 5005 * s->args_size to the BPF augmenter (now 5006 * tools/perf/examples/bpf/augmented_raw_syscalls.c, 5007 * so that it copies only what we need for each 5008 * syscall, like what happens when we use 5009 * syscalls:sys_enter_NAME, so that we reduce 5010 * the kernel/userspace traffic to just what is 5011 * needed for each syscall. 5012 */ 5013 if (trace.raw_augmented_syscalls) 5014 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset; 5015 evsel__init_augmented_syscall_tp_ret(evsel); 5016 evsel->handler = trace__sys_exit; 5017 } 5018 } 5019 } 5020 5021 if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) 5022 return trace__record(&trace, argc-1, &argv[1]); 5023 5024 /* Using just --errno-summary will trigger --summary */ 5025 if (trace.errno_summary && !trace.summary && !trace.summary_only) 5026 trace.summary_only = true; 5027 5028 /* summary_only implies summary option, but don't overwrite summary if set */ 5029 if (trace.summary_only) 5030 trace.summary = trace.summary_only; 5031 5032 if (output_name != NULL) { 5033 err = trace__open_output(&trace, output_name); 5034 if (err < 0) { 5035 perror("failed to create output file"); 5036 goto out; 5037 } 5038 } 5039 5040 err = evswitch__init(&trace.evswitch, trace.evlist, stderr); 5041 if (err) 5042 goto out_close; 5043 5044 err = target__validate(&trace.opts.target); 5045 if (err) { 5046 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 5047 fprintf(trace.output, "%s", bf); 5048 goto out_close; 5049 } 5050 5051 err = target__parse_uid(&trace.opts.target); 5052 if (err) { 5053 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 5054 fprintf(trace.output, "%s", bf); 5055 goto out_close; 5056 } 5057 5058 if (!argc && target__none(&trace.opts.target)) 5059 trace.opts.target.system_wide = true; 5060 5061 if (input_name) 5062 err = trace__replay(&trace); 5063 else 5064 err = trace__run(&trace, argc, argv); 5065 5066 out_close: 5067 if (output_name != NULL) 5068 fclose(trace.output); 5069 out: 5070 trace__exit(&trace); 5071 #ifdef HAVE_BPF_SKEL 5072 augmented_raw_syscalls_bpf__destroy(trace.skel); 5073 #endif 5074 return err; 5075 } 5076