1 /* 2 * builtin-trace.c 3 * 4 * Builtin 'trace' command: 5 * 6 * Display a continuously updated trace of any workload, CPU, specific PID, 7 * system wide, etc. Default format is loosely strace like, but any other 8 * event may be specified using --event. 9 * 10 * Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> 11 * 12 * Initially based on the 'trace' prototype by Thomas Gleixner: 13 * 14 * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'") 15 */ 16 17 #include "util/record.h" 18 #include <traceevent/event-parse.h> 19 #include <api/fs/tracing_path.h> 20 #include <bpf/bpf.h> 21 #include "util/bpf_map.h" 22 #include "util/rlimit.h" 23 #include "builtin.h" 24 #include "util/cgroup.h" 25 #include "util/color.h" 26 #include "util/config.h" 27 #include "util/debug.h" 28 #include "util/dso.h" 29 #include "util/env.h" 30 #include "util/event.h" 31 #include "util/evsel.h" 32 #include "util/evsel_fprintf.h" 33 #include "util/synthetic-events.h" 34 #include "util/evlist.h" 35 #include "util/evswitch.h" 36 #include "util/mmap.h" 37 #include <subcmd/pager.h> 38 #include <subcmd/exec-cmd.h> 39 #include "util/machine.h" 40 #include "util/map.h" 41 #include "util/symbol.h" 42 #include "util/path.h" 43 #include "util/session.h" 44 #include "util/thread.h" 45 #include <subcmd/parse-options.h> 46 #include "util/strlist.h" 47 #include "util/intlist.h" 48 #include "util/thread_map.h" 49 #include "util/stat.h" 50 #include "util/tool.h" 51 #include "util/util.h" 52 #include "trace/beauty/beauty.h" 53 #include "trace-event.h" 54 #include "util/parse-events.h" 55 #include "util/bpf-loader.h" 56 #include "callchain.h" 57 #include "print_binary.h" 58 #include "string2.h" 59 #include "syscalltbl.h" 60 #include "rb_resort.h" 61 #include "../perf.h" 62 63 #include <errno.h> 64 #include <inttypes.h> 65 #include <poll.h> 66 #include <signal.h> 67 #include <stdlib.h> 68 #include <string.h> 69 #include <linux/err.h> 70 #include <linux/filter.h> 71 #include <linux/kernel.h> 72 #include <linux/random.h> 73 #include <linux/stringify.h> 74 #include <linux/time64.h> 75 #include <linux/zalloc.h> 76 #include <fcntl.h> 77 #include <sys/sysmacros.h> 78 79 #include <linux/ctype.h> 80 81 #ifndef O_CLOEXEC 82 # define O_CLOEXEC 02000000 83 #endif 84 85 #ifndef F_LINUX_SPECIFIC_BASE 86 # define F_LINUX_SPECIFIC_BASE 1024 87 #endif 88 89 struct trace { 90 struct perf_tool tool; 91 struct syscalltbl *sctbl; 92 struct { 93 struct syscall *table; 94 struct bpf_map *map; 95 struct { // per syscall BPF_MAP_TYPE_PROG_ARRAY 96 struct bpf_map *sys_enter, 97 *sys_exit; 98 } prog_array; 99 struct { 100 struct evsel *sys_enter, 101 *sys_exit, 102 *augmented; 103 } events; 104 struct bpf_program *unaugmented_prog; 105 } syscalls; 106 struct { 107 struct bpf_map *map; 108 } dump; 109 struct record_opts opts; 110 struct evlist *evlist; 111 struct machine *host; 112 struct thread *current; 113 struct bpf_object *bpf_obj; 114 struct cgroup *cgroup; 115 u64 base_time; 116 FILE *output; 117 unsigned long nr_events; 118 unsigned long nr_events_printed; 119 unsigned long max_events; 120 struct evswitch evswitch; 121 struct strlist *ev_qualifier; 122 struct { 123 size_t nr; 124 int *entries; 125 } ev_qualifier_ids; 126 struct { 127 size_t nr; 128 pid_t *entries; 129 struct bpf_map *map; 130 } filter_pids; 131 double duration_filter; 132 double runtime_ms; 133 struct { 134 u64 vfs_getname, 135 proc_getname; 136 } stats; 137 unsigned int max_stack; 138 unsigned int min_stack; 139 int raw_augmented_syscalls_args_size; 140 bool raw_augmented_syscalls; 141 bool fd_path_disabled; 142 bool sort_events; 143 bool not_ev_qualifier; 144 bool live; 145 bool full_time; 146 bool sched; 147 bool multiple_threads; 148 bool summary; 149 bool summary_only; 150 bool failure_only; 151 bool show_comm; 152 bool print_sample; 153 bool show_tool_stats; 154 bool trace_syscalls; 155 bool kernel_syscallchains; 156 s16 args_alignment; 157 bool show_tstamp; 158 bool show_duration; 159 bool show_zeros; 160 bool show_arg_names; 161 bool show_string_prefix; 162 bool force; 163 bool vfs_getname; 164 int trace_pgfaults; 165 struct { 166 struct ordered_events data; 167 u64 last; 168 } oe; 169 }; 170 171 struct tp_field { 172 int offset; 173 union { 174 u64 (*integer)(struct tp_field *field, struct perf_sample *sample); 175 void *(*pointer)(struct tp_field *field, struct perf_sample *sample); 176 }; 177 }; 178 179 #define TP_UINT_FIELD(bits) \ 180 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \ 181 { \ 182 u##bits value; \ 183 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 184 return value; \ 185 } 186 187 TP_UINT_FIELD(8); 188 TP_UINT_FIELD(16); 189 TP_UINT_FIELD(32); 190 TP_UINT_FIELD(64); 191 192 #define TP_UINT_FIELD__SWAPPED(bits) \ 193 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \ 194 { \ 195 u##bits value; \ 196 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 197 return bswap_##bits(value);\ 198 } 199 200 TP_UINT_FIELD__SWAPPED(16); 201 TP_UINT_FIELD__SWAPPED(32); 202 TP_UINT_FIELD__SWAPPED(64); 203 204 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap) 205 { 206 field->offset = offset; 207 208 switch (size) { 209 case 1: 210 field->integer = tp_field__u8; 211 break; 212 case 2: 213 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16; 214 break; 215 case 4: 216 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32; 217 break; 218 case 8: 219 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64; 220 break; 221 default: 222 return -1; 223 } 224 225 return 0; 226 } 227 228 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap) 229 { 230 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap); 231 } 232 233 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample) 234 { 235 return sample->raw_data + field->offset; 236 } 237 238 static int __tp_field__init_ptr(struct tp_field *field, int offset) 239 { 240 field->offset = offset; 241 field->pointer = tp_field__ptr; 242 return 0; 243 } 244 245 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field) 246 { 247 return __tp_field__init_ptr(field, format_field->offset); 248 } 249 250 struct syscall_tp { 251 struct tp_field id; 252 union { 253 struct tp_field args, ret; 254 }; 255 }; 256 257 static int perf_evsel__init_tp_uint_field(struct evsel *evsel, 258 struct tp_field *field, 259 const char *name) 260 { 261 struct tep_format_field *format_field = perf_evsel__field(evsel, name); 262 263 if (format_field == NULL) 264 return -1; 265 266 return tp_field__init_uint(field, format_field, evsel->needs_swap); 267 } 268 269 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \ 270 ({ struct syscall_tp *sc = evsel->priv;\ 271 perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); }) 272 273 static int perf_evsel__init_tp_ptr_field(struct evsel *evsel, 274 struct tp_field *field, 275 const char *name) 276 { 277 struct tep_format_field *format_field = perf_evsel__field(evsel, name); 278 279 if (format_field == NULL) 280 return -1; 281 282 return tp_field__init_ptr(field, format_field); 283 } 284 285 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \ 286 ({ struct syscall_tp *sc = evsel->priv;\ 287 perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); }) 288 289 static void evsel__delete_priv(struct evsel *evsel) 290 { 291 zfree(&evsel->priv); 292 evsel__delete(evsel); 293 } 294 295 static int perf_evsel__init_syscall_tp(struct evsel *evsel) 296 { 297 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp)); 298 299 if (evsel->priv != NULL) { 300 if (perf_evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") && 301 perf_evsel__init_tp_uint_field(evsel, &sc->id, "nr")) 302 goto out_delete; 303 return 0; 304 } 305 306 return -ENOMEM; 307 out_delete: 308 zfree(&evsel->priv); 309 return -ENOENT; 310 } 311 312 static int perf_evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp) 313 { 314 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp)); 315 316 if (evsel->priv != NULL) { 317 struct tep_format_field *syscall_id = perf_evsel__field(tp, "id"); 318 if (syscall_id == NULL) 319 syscall_id = perf_evsel__field(tp, "__syscall_nr"); 320 if (syscall_id == NULL) 321 goto out_delete; 322 if (__tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap)) 323 goto out_delete; 324 325 return 0; 326 } 327 328 return -ENOMEM; 329 out_delete: 330 zfree(&evsel->priv); 331 return -EINVAL; 332 } 333 334 static int perf_evsel__init_augmented_syscall_tp_args(struct evsel *evsel) 335 { 336 struct syscall_tp *sc = evsel->priv; 337 338 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)); 339 } 340 341 static int perf_evsel__init_augmented_syscall_tp_ret(struct evsel *evsel) 342 { 343 struct syscall_tp *sc = evsel->priv; 344 345 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap); 346 } 347 348 static int perf_evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler) 349 { 350 evsel->priv = malloc(sizeof(struct syscall_tp)); 351 if (evsel->priv != NULL) { 352 if (perf_evsel__init_sc_tp_uint_field(evsel, id)) 353 goto out_delete; 354 355 evsel->handler = handler; 356 return 0; 357 } 358 359 return -ENOMEM; 360 361 out_delete: 362 zfree(&evsel->priv); 363 return -ENOENT; 364 } 365 366 static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler) 367 { 368 struct evsel *evsel = perf_evsel__newtp("raw_syscalls", direction); 369 370 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */ 371 if (IS_ERR(evsel)) 372 evsel = perf_evsel__newtp("syscalls", direction); 373 374 if (IS_ERR(evsel)) 375 return NULL; 376 377 if (perf_evsel__init_raw_syscall_tp(evsel, handler)) 378 goto out_delete; 379 380 return evsel; 381 382 out_delete: 383 evsel__delete_priv(evsel); 384 return NULL; 385 } 386 387 #define perf_evsel__sc_tp_uint(evsel, name, sample) \ 388 ({ struct syscall_tp *fields = evsel->priv; \ 389 fields->name.integer(&fields->name, sample); }) 390 391 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \ 392 ({ struct syscall_tp *fields = evsel->priv; \ 393 fields->name.pointer(&fields->name, sample); }) 394 395 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 396 { 397 int idx = val - sa->offset; 398 399 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { 400 size_t printed = scnprintf(bf, size, intfmt, val); 401 if (show_prefix) 402 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); 403 return printed; 404 } 405 406 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 407 } 408 409 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size, 410 const char *intfmt, 411 struct syscall_arg *arg) 412 { 413 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val); 414 } 415 416 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size, 417 struct syscall_arg *arg) 418 { 419 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg); 420 } 421 422 #define SCA_STRARRAY syscall_arg__scnprintf_strarray 423 424 size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg) 425 { 426 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val); 427 } 428 429 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 430 { 431 size_t printed; 432 int i; 433 434 for (i = 0; i < sas->nr_entries; ++i) { 435 struct strarray *sa = sas->entries[i]; 436 int idx = val - sa->offset; 437 438 if (idx >= 0 && idx < sa->nr_entries) { 439 if (sa->entries[idx] == NULL) 440 break; 441 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 442 } 443 } 444 445 printed = scnprintf(bf, size, intfmt, val); 446 if (show_prefix) 447 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix); 448 return printed; 449 } 450 451 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size, 452 struct syscall_arg *arg) 453 { 454 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val); 455 } 456 457 #ifndef AT_FDCWD 458 #define AT_FDCWD -100 459 #endif 460 461 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size, 462 struct syscall_arg *arg) 463 { 464 int fd = arg->val; 465 const char *prefix = "AT_FD"; 466 467 if (fd == AT_FDCWD) 468 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD"); 469 470 return syscall_arg__scnprintf_fd(bf, size, arg); 471 } 472 473 #define SCA_FDAT syscall_arg__scnprintf_fd_at 474 475 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 476 struct syscall_arg *arg); 477 478 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd 479 480 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg) 481 { 482 return scnprintf(bf, size, "%#lx", arg->val); 483 } 484 485 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg) 486 { 487 if (arg->val == 0) 488 return scnprintf(bf, size, "NULL"); 489 return syscall_arg__scnprintf_hex(bf, size, arg); 490 } 491 492 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg) 493 { 494 return scnprintf(bf, size, "%d", arg->val); 495 } 496 497 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg) 498 { 499 return scnprintf(bf, size, "%ld", arg->val); 500 } 501 502 static const char *bpf_cmd[] = { 503 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM", 504 "MAP_GET_NEXT_KEY", "PROG_LOAD", 505 }; 506 static DEFINE_STRARRAY(bpf_cmd, "BPF_"); 507 508 static const char *fsmount_flags[] = { 509 [1] = "CLOEXEC", 510 }; 511 static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_"); 512 513 #include "trace/beauty/generated/fsconfig_arrays.c" 514 515 static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_"); 516 517 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", }; 518 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1); 519 520 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", }; 521 static DEFINE_STRARRAY(itimers, "ITIMER_"); 522 523 static const char *keyctl_options[] = { 524 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN", 525 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ", 526 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT", 527 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT", 528 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT", 529 }; 530 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_"); 531 532 static const char *whences[] = { "SET", "CUR", "END", 533 #ifdef SEEK_DATA 534 "DATA", 535 #endif 536 #ifdef SEEK_HOLE 537 "HOLE", 538 #endif 539 }; 540 static DEFINE_STRARRAY(whences, "SEEK_"); 541 542 static const char *fcntl_cmds[] = { 543 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK", 544 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64", 545 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX", 546 "GETOWNER_UIDS", 547 }; 548 static DEFINE_STRARRAY(fcntl_cmds, "F_"); 549 550 static const char *fcntl_linux_specific_cmds[] = { 551 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC", 552 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS", 553 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT", 554 }; 555 556 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE); 557 558 static struct strarray *fcntl_cmds_arrays[] = { 559 &strarray__fcntl_cmds, 560 &strarray__fcntl_linux_specific_cmds, 561 }; 562 563 static DEFINE_STRARRAYS(fcntl_cmds_arrays); 564 565 static const char *rlimit_resources[] = { 566 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE", 567 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO", 568 "RTTIME", 569 }; 570 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_"); 571 572 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", }; 573 static DEFINE_STRARRAY(sighow, "SIG_"); 574 575 static const char *clockid[] = { 576 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID", 577 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME", 578 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI" 579 }; 580 static DEFINE_STRARRAY(clockid, "CLOCK_"); 581 582 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size, 583 struct syscall_arg *arg) 584 { 585 bool show_prefix = arg->show_string_prefix; 586 const char *suffix = "_OK"; 587 size_t printed = 0; 588 int mode = arg->val; 589 590 if (mode == F_OK) /* 0 */ 591 return scnprintf(bf, size, "F%s", show_prefix ? suffix : ""); 592 #define P_MODE(n) \ 593 if (mode & n##_OK) { \ 594 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \ 595 mode &= ~n##_OK; \ 596 } 597 598 P_MODE(R); 599 P_MODE(W); 600 P_MODE(X); 601 #undef P_MODE 602 603 if (mode) 604 printed += scnprintf(bf + printed, size - printed, "|%#x", mode); 605 606 return printed; 607 } 608 609 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode 610 611 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 612 struct syscall_arg *arg); 613 614 #define SCA_FILENAME syscall_arg__scnprintf_filename 615 616 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size, 617 struct syscall_arg *arg) 618 { 619 bool show_prefix = arg->show_string_prefix; 620 const char *prefix = "O_"; 621 int printed = 0, flags = arg->val; 622 623 #define P_FLAG(n) \ 624 if (flags & O_##n) { \ 625 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 626 flags &= ~O_##n; \ 627 } 628 629 P_FLAG(CLOEXEC); 630 P_FLAG(NONBLOCK); 631 #undef P_FLAG 632 633 if (flags) 634 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 635 636 return printed; 637 } 638 639 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags 640 641 #ifndef GRND_NONBLOCK 642 #define GRND_NONBLOCK 0x0001 643 #endif 644 #ifndef GRND_RANDOM 645 #define GRND_RANDOM 0x0002 646 #endif 647 648 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size, 649 struct syscall_arg *arg) 650 { 651 bool show_prefix = arg->show_string_prefix; 652 const char *prefix = "GRND_"; 653 int printed = 0, flags = arg->val; 654 655 #define P_FLAG(n) \ 656 if (flags & GRND_##n) { \ 657 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 658 flags &= ~GRND_##n; \ 659 } 660 661 P_FLAG(RANDOM); 662 P_FLAG(NONBLOCK); 663 #undef P_FLAG 664 665 if (flags) 666 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 667 668 return printed; 669 } 670 671 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags 672 673 #define STRARRAY(name, array) \ 674 { .scnprintf = SCA_STRARRAY, \ 675 .parm = &strarray__##array, } 676 677 #define STRARRAY_FLAGS(name, array) \ 678 { .scnprintf = SCA_STRARRAY_FLAGS, \ 679 .parm = &strarray__##array, } 680 681 #include "trace/beauty/arch_errno_names.c" 682 #include "trace/beauty/eventfd.c" 683 #include "trace/beauty/futex_op.c" 684 #include "trace/beauty/futex_val3.c" 685 #include "trace/beauty/mmap.c" 686 #include "trace/beauty/mode_t.c" 687 #include "trace/beauty/msg_flags.c" 688 #include "trace/beauty/open_flags.c" 689 #include "trace/beauty/perf_event_open.c" 690 #include "trace/beauty/pid.c" 691 #include "trace/beauty/sched_policy.c" 692 #include "trace/beauty/seccomp.c" 693 #include "trace/beauty/signum.c" 694 #include "trace/beauty/socket_type.c" 695 #include "trace/beauty/waitid_options.c" 696 697 struct syscall_arg_fmt { 698 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 699 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val); 700 void *parm; 701 const char *name; 702 bool show_zero; 703 }; 704 705 static struct syscall_fmt { 706 const char *name; 707 const char *alias; 708 struct { 709 const char *sys_enter, 710 *sys_exit; 711 } bpf_prog_name; 712 struct syscall_arg_fmt arg[6]; 713 u8 nr_args; 714 bool errpid; 715 bool timeout; 716 bool hexret; 717 } syscall_fmts[] = { 718 { .name = "access", 719 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, }, 720 { .name = "arch_prctl", 721 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ }, 722 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, }, 723 { .name = "bind", 724 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ }, 725 [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ }, 726 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, }, 727 { .name = "bpf", 728 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, }, 729 { .name = "brk", .hexret = true, 730 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, }, 731 { .name = "clock_gettime", 732 .arg = { [0] = STRARRAY(clk_id, clockid), }, }, 733 { .name = "clone", .errpid = true, .nr_args = 5, 734 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, }, 735 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, }, 736 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, }, 737 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, }, 738 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, }, 739 { .name = "close", 740 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, }, 741 { .name = "connect", 742 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ }, 743 [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ }, 744 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, }, 745 { .name = "epoll_ctl", 746 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, }, 747 { .name = "eventfd2", 748 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, }, 749 { .name = "fchmodat", 750 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 751 { .name = "fchownat", 752 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 753 { .name = "fcntl", 754 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */ 755 .parm = &strarrays__fcntl_cmds_arrays, 756 .show_zero = true, }, 757 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, }, 758 { .name = "flock", 759 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, }, 760 { .name = "fsconfig", 761 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, }, 762 { .name = "fsmount", 763 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags), 764 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, }, 765 { .name = "fspick", 766 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 767 [1] = { .scnprintf = SCA_FILENAME, /* path */ }, 768 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, }, 769 { .name = "fstat", .alias = "newfstat", }, 770 { .name = "fstatat", .alias = "newfstatat", }, 771 { .name = "futex", 772 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ }, 773 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, }, 774 { .name = "futimesat", 775 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 776 { .name = "getitimer", 777 .arg = { [0] = STRARRAY(which, itimers), }, }, 778 { .name = "getpid", .errpid = true, }, 779 { .name = "getpgid", .errpid = true, }, 780 { .name = "getppid", .errpid = true, }, 781 { .name = "getrandom", 782 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, }, 783 { .name = "getrlimit", 784 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 785 { .name = "gettid", .errpid = true, }, 786 { .name = "ioctl", 787 .arg = { 788 #if defined(__i386__) || defined(__x86_64__) 789 /* 790 * FIXME: Make this available to all arches. 791 */ 792 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ }, 793 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 794 #else 795 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 796 #endif 797 { .name = "kcmp", .nr_args = 5, 798 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, }, 799 [1] = { .name = "pid2", .scnprintf = SCA_PID, }, 800 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, }, 801 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, }, 802 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, }, 803 { .name = "keyctl", 804 .arg = { [0] = STRARRAY(option, keyctl_options), }, }, 805 { .name = "kill", 806 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 807 { .name = "linkat", 808 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 809 { .name = "lseek", 810 .arg = { [2] = STRARRAY(whence, whences), }, }, 811 { .name = "lstat", .alias = "newlstat", }, 812 { .name = "madvise", 813 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 814 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, }, 815 { .name = "mkdirat", 816 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 817 { .name = "mknodat", 818 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 819 { .name = "mmap", .hexret = true, 820 /* The standard mmap maps to old_mmap on s390x */ 821 #if defined(__s390x__) 822 .alias = "old_mmap", 823 #endif 824 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 825 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ }, 826 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, }, 827 { .name = "mount", 828 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ }, 829 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ 830 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, }, 831 { .name = "move_mount", 832 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ }, 833 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ }, 834 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ }, 835 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ }, 836 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, }, 837 { .name = "mprotect", 838 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 839 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, }, 840 { .name = "mq_unlink", 841 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, }, 842 { .name = "mremap", .hexret = true, 843 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, }, 844 { .name = "name_to_handle_at", 845 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 846 { .name = "newfstatat", 847 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 848 { .name = "open", 849 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 850 { .name = "open_by_handle_at", 851 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 852 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 853 { .name = "openat", 854 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 855 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 856 { .name = "perf_event_open", 857 .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ }, 858 [3] = { .scnprintf = SCA_FD, /* group_fd */ }, 859 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, }, 860 { .name = "pipe2", 861 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, }, 862 { .name = "pkey_alloc", 863 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, }, 864 { .name = "pkey_free", 865 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, }, 866 { .name = "pkey_mprotect", 867 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 868 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 869 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, }, 870 { .name = "poll", .timeout = true, }, 871 { .name = "ppoll", .timeout = true, }, 872 { .name = "prctl", 873 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ }, 874 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ }, 875 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, }, 876 { .name = "pread", .alias = "pread64", }, 877 { .name = "preadv", .alias = "pread", }, 878 { .name = "prlimit64", 879 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, }, 880 { .name = "pwrite", .alias = "pwrite64", }, 881 { .name = "readlinkat", 882 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 883 { .name = "recvfrom", 884 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 885 { .name = "recvmmsg", 886 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 887 { .name = "recvmsg", 888 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 889 { .name = "renameat", 890 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 891 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, }, 892 { .name = "renameat2", 893 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 894 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, 895 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, }, 896 { .name = "rt_sigaction", 897 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 898 { .name = "rt_sigprocmask", 899 .arg = { [0] = STRARRAY(how, sighow), }, }, 900 { .name = "rt_sigqueueinfo", 901 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 902 { .name = "rt_tgsigqueueinfo", 903 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 904 { .name = "sched_setscheduler", 905 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, }, 906 { .name = "seccomp", 907 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ }, 908 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, }, 909 { .name = "select", .timeout = true, }, 910 { .name = "sendfile", .alias = "sendfile64", }, 911 { .name = "sendmmsg", 912 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 913 { .name = "sendmsg", 914 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 915 { .name = "sendto", 916 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, 917 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, }, 918 { .name = "set_tid_address", .errpid = true, }, 919 { .name = "setitimer", 920 .arg = { [0] = STRARRAY(which, itimers), }, }, 921 { .name = "setrlimit", 922 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 923 { .name = "socket", 924 .arg = { [0] = STRARRAY(family, socket_families), 925 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 926 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 927 { .name = "socketpair", 928 .arg = { [0] = STRARRAY(family, socket_families), 929 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 930 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 931 { .name = "stat", .alias = "newstat", }, 932 { .name = "statx", 933 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ }, 934 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } , 935 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, }, 936 { .name = "swapoff", 937 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 938 { .name = "swapon", 939 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 940 { .name = "symlinkat", 941 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 942 { .name = "sync_file_range", 943 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, }, 944 { .name = "tgkill", 945 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 946 { .name = "tkill", 947 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 948 { .name = "umount2", .alias = "umount", 949 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, }, 950 { .name = "uname", .alias = "newuname", }, 951 { .name = "unlinkat", 952 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 953 { .name = "utimensat", 954 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, }, 955 { .name = "wait4", .errpid = true, 956 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 957 { .name = "waitid", .errpid = true, 958 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 959 }; 960 961 static int syscall_fmt__cmp(const void *name, const void *fmtp) 962 { 963 const struct syscall_fmt *fmt = fmtp; 964 return strcmp(name, fmt->name); 965 } 966 967 static struct syscall_fmt *syscall_fmt__find(const char *name) 968 { 969 const int nmemb = ARRAY_SIZE(syscall_fmts); 970 return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp); 971 } 972 973 static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias) 974 { 975 int i, nmemb = ARRAY_SIZE(syscall_fmts); 976 977 for (i = 0; i < nmemb; ++i) { 978 if (syscall_fmts[i].alias && strcmp(syscall_fmts[i].alias, alias) == 0) 979 return &syscall_fmts[i]; 980 } 981 982 return NULL; 983 } 984 985 /* 986 * is_exit: is this "exit" or "exit_group"? 987 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter. 988 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc. 989 * nonexistent: Just a hole in the syscall table, syscall id not allocated 990 */ 991 struct syscall { 992 struct tep_event *tp_format; 993 int nr_args; 994 int args_size; 995 struct { 996 struct bpf_program *sys_enter, 997 *sys_exit; 998 } bpf_prog; 999 bool is_exit; 1000 bool is_open; 1001 bool nonexistent; 1002 struct tep_format_field *args; 1003 const char *name; 1004 struct syscall_fmt *fmt; 1005 struct syscall_arg_fmt *arg_fmt; 1006 }; 1007 1008 /* 1009 * Must match what is in the BPF program: 1010 * 1011 * tools/perf/examples/bpf/augmented_raw_syscalls.c 1012 */ 1013 struct bpf_map_syscall_entry { 1014 bool enabled; 1015 u16 string_args_len[6]; 1016 }; 1017 1018 /* 1019 * We need to have this 'calculated' boolean because in some cases we really 1020 * don't know what is the duration of a syscall, for instance, when we start 1021 * a session and some threads are waiting for a syscall to finish, say 'poll', 1022 * in which case all we can do is to print "( ? ) for duration and for the 1023 * start timestamp. 1024 */ 1025 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp) 1026 { 1027 double duration = (double)t / NSEC_PER_MSEC; 1028 size_t printed = fprintf(fp, "("); 1029 1030 if (!calculated) 1031 printed += fprintf(fp, " "); 1032 else if (duration >= 1.0) 1033 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration); 1034 else if (duration >= 0.01) 1035 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration); 1036 else 1037 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration); 1038 return printed + fprintf(fp, "): "); 1039 } 1040 1041 /** 1042 * filename.ptr: The filename char pointer that will be vfs_getname'd 1043 * filename.entry_str_pos: Where to insert the string translated from 1044 * filename.ptr by the vfs_getname tracepoint/kprobe. 1045 * ret_scnprintf: syscall args may set this to a different syscall return 1046 * formatter, for instance, fcntl may return fds, file flags, etc. 1047 */ 1048 struct thread_trace { 1049 u64 entry_time; 1050 bool entry_pending; 1051 unsigned long nr_events; 1052 unsigned long pfmaj, pfmin; 1053 char *entry_str; 1054 double runtime_ms; 1055 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 1056 struct { 1057 unsigned long ptr; 1058 short int entry_str_pos; 1059 bool pending_open; 1060 unsigned int namelen; 1061 char *name; 1062 } filename; 1063 struct { 1064 int max; 1065 struct file *table; 1066 } files; 1067 1068 struct intlist *syscall_stats; 1069 }; 1070 1071 static struct thread_trace *thread_trace__new(void) 1072 { 1073 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace)); 1074 1075 if (ttrace) { 1076 ttrace->files.max = -1; 1077 ttrace->syscall_stats = intlist__new(NULL); 1078 } 1079 1080 return ttrace; 1081 } 1082 1083 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp) 1084 { 1085 struct thread_trace *ttrace; 1086 1087 if (thread == NULL) 1088 goto fail; 1089 1090 if (thread__priv(thread) == NULL) 1091 thread__set_priv(thread, thread_trace__new()); 1092 1093 if (thread__priv(thread) == NULL) 1094 goto fail; 1095 1096 ttrace = thread__priv(thread); 1097 ++ttrace->nr_events; 1098 1099 return ttrace; 1100 fail: 1101 color_fprintf(fp, PERF_COLOR_RED, 1102 "WARNING: not enough memory, dropping samples!\n"); 1103 return NULL; 1104 } 1105 1106 1107 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg, 1108 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg)) 1109 { 1110 struct thread_trace *ttrace = thread__priv(arg->thread); 1111 1112 ttrace->ret_scnprintf = ret_scnprintf; 1113 } 1114 1115 #define TRACE_PFMAJ (1 << 0) 1116 #define TRACE_PFMIN (1 << 1) 1117 1118 static const size_t trace__entry_str_size = 2048; 1119 1120 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd) 1121 { 1122 if (fd < 0) 1123 return NULL; 1124 1125 if (fd > ttrace->files.max) { 1126 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file)); 1127 1128 if (nfiles == NULL) 1129 return NULL; 1130 1131 if (ttrace->files.max != -1) { 1132 memset(nfiles + ttrace->files.max + 1, 0, 1133 (fd - ttrace->files.max) * sizeof(struct file)); 1134 } else { 1135 memset(nfiles, 0, (fd + 1) * sizeof(struct file)); 1136 } 1137 1138 ttrace->files.table = nfiles; 1139 ttrace->files.max = fd; 1140 } 1141 1142 return ttrace->files.table + fd; 1143 } 1144 1145 struct file *thread__files_entry(struct thread *thread, int fd) 1146 { 1147 return thread_trace__files_entry(thread__priv(thread), fd); 1148 } 1149 1150 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname) 1151 { 1152 struct thread_trace *ttrace = thread__priv(thread); 1153 struct file *file = thread_trace__files_entry(ttrace, fd); 1154 1155 if (file != NULL) { 1156 struct stat st; 1157 if (stat(pathname, &st) == 0) 1158 file->dev_maj = major(st.st_rdev); 1159 file->pathname = strdup(pathname); 1160 if (file->pathname) 1161 return 0; 1162 } 1163 1164 return -1; 1165 } 1166 1167 static int thread__read_fd_path(struct thread *thread, int fd) 1168 { 1169 char linkname[PATH_MAX], pathname[PATH_MAX]; 1170 struct stat st; 1171 int ret; 1172 1173 if (thread->pid_ == thread->tid) { 1174 scnprintf(linkname, sizeof(linkname), 1175 "/proc/%d/fd/%d", thread->pid_, fd); 1176 } else { 1177 scnprintf(linkname, sizeof(linkname), 1178 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd); 1179 } 1180 1181 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname)) 1182 return -1; 1183 1184 ret = readlink(linkname, pathname, sizeof(pathname)); 1185 1186 if (ret < 0 || ret > st.st_size) 1187 return -1; 1188 1189 pathname[ret] = '\0'; 1190 return trace__set_fd_pathname(thread, fd, pathname); 1191 } 1192 1193 static const char *thread__fd_path(struct thread *thread, int fd, 1194 struct trace *trace) 1195 { 1196 struct thread_trace *ttrace = thread__priv(thread); 1197 1198 if (ttrace == NULL || trace->fd_path_disabled) 1199 return NULL; 1200 1201 if (fd < 0) 1202 return NULL; 1203 1204 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) { 1205 if (!trace->live) 1206 return NULL; 1207 ++trace->stats.proc_getname; 1208 if (thread__read_fd_path(thread, fd)) 1209 return NULL; 1210 } 1211 1212 return ttrace->files.table[fd].pathname; 1213 } 1214 1215 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg) 1216 { 1217 int fd = arg->val; 1218 size_t printed = scnprintf(bf, size, "%d", fd); 1219 const char *path = thread__fd_path(arg->thread, fd, arg->trace); 1220 1221 if (path) 1222 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1223 1224 return printed; 1225 } 1226 1227 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size) 1228 { 1229 size_t printed = scnprintf(bf, size, "%d", fd); 1230 struct thread *thread = machine__find_thread(trace->host, pid, pid); 1231 1232 if (thread) { 1233 const char *path = thread__fd_path(thread, fd, trace); 1234 1235 if (path) 1236 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1237 1238 thread__put(thread); 1239 } 1240 1241 return printed; 1242 } 1243 1244 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 1245 struct syscall_arg *arg) 1246 { 1247 int fd = arg->val; 1248 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg); 1249 struct thread_trace *ttrace = thread__priv(arg->thread); 1250 1251 if (ttrace && fd >= 0 && fd <= ttrace->files.max) 1252 zfree(&ttrace->files.table[fd].pathname); 1253 1254 return printed; 1255 } 1256 1257 static void thread__set_filename_pos(struct thread *thread, const char *bf, 1258 unsigned long ptr) 1259 { 1260 struct thread_trace *ttrace = thread__priv(thread); 1261 1262 ttrace->filename.ptr = ptr; 1263 ttrace->filename.entry_str_pos = bf - ttrace->entry_str; 1264 } 1265 1266 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size) 1267 { 1268 struct augmented_arg *augmented_arg = arg->augmented.args; 1269 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value); 1270 /* 1271 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls 1272 * we would have two strings, each prefixed by its size. 1273 */ 1274 int consumed = sizeof(*augmented_arg) + augmented_arg->size; 1275 1276 arg->augmented.args = ((void *)arg->augmented.args) + consumed; 1277 arg->augmented.size -= consumed; 1278 1279 return printed; 1280 } 1281 1282 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 1283 struct syscall_arg *arg) 1284 { 1285 unsigned long ptr = arg->val; 1286 1287 if (arg->augmented.args) 1288 return syscall_arg__scnprintf_augmented_string(arg, bf, size); 1289 1290 if (!arg->trace->vfs_getname) 1291 return scnprintf(bf, size, "%#x", ptr); 1292 1293 thread__set_filename_pos(arg->thread, bf, ptr); 1294 return 0; 1295 } 1296 1297 static bool trace__filter_duration(struct trace *trace, double t) 1298 { 1299 return t < (trace->duration_filter * NSEC_PER_MSEC); 1300 } 1301 1302 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1303 { 1304 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC; 1305 1306 return fprintf(fp, "%10.3f ", ts); 1307 } 1308 1309 /* 1310 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are 1311 * using ttrace->entry_time for a thread that receives a sys_exit without 1312 * first having received a sys_enter ("poll" issued before tracing session 1313 * starts, lost sys_enter exit due to ring buffer overflow). 1314 */ 1315 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1316 { 1317 if (tstamp > 0) 1318 return __trace__fprintf_tstamp(trace, tstamp, fp); 1319 1320 return fprintf(fp, " ? "); 1321 } 1322 1323 static bool done = false; 1324 static bool interrupted = false; 1325 1326 static void sig_handler(int sig) 1327 { 1328 done = true; 1329 interrupted = sig == SIGINT; 1330 } 1331 1332 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp) 1333 { 1334 size_t printed = 0; 1335 1336 if (trace->multiple_threads) { 1337 if (trace->show_comm) 1338 printed += fprintf(fp, "%.14s/", thread__comm_str(thread)); 1339 printed += fprintf(fp, "%d ", thread->tid); 1340 } 1341 1342 return printed; 1343 } 1344 1345 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread, 1346 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp) 1347 { 1348 size_t printed = 0; 1349 1350 if (trace->show_tstamp) 1351 printed = trace__fprintf_tstamp(trace, tstamp, fp); 1352 if (trace->show_duration) 1353 printed += fprintf_duration(duration, duration_calculated, fp); 1354 return printed + trace__fprintf_comm_tid(trace, thread, fp); 1355 } 1356 1357 static int trace__process_event(struct trace *trace, struct machine *machine, 1358 union perf_event *event, struct perf_sample *sample) 1359 { 1360 int ret = 0; 1361 1362 switch (event->header.type) { 1363 case PERF_RECORD_LOST: 1364 color_fprintf(trace->output, PERF_COLOR_RED, 1365 "LOST %" PRIu64 " events!\n", event->lost.lost); 1366 ret = machine__process_lost_event(machine, event, sample); 1367 break; 1368 default: 1369 ret = machine__process_event(machine, event, sample); 1370 break; 1371 } 1372 1373 return ret; 1374 } 1375 1376 static int trace__tool_process(struct perf_tool *tool, 1377 union perf_event *event, 1378 struct perf_sample *sample, 1379 struct machine *machine) 1380 { 1381 struct trace *trace = container_of(tool, struct trace, tool); 1382 return trace__process_event(trace, machine, event, sample); 1383 } 1384 1385 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) 1386 { 1387 struct machine *machine = vmachine; 1388 1389 if (machine->kptr_restrict_warned) 1390 return NULL; 1391 1392 if (symbol_conf.kptr_restrict) { 1393 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" 1394 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n" 1395 "Kernel samples will not be resolved.\n"); 1396 machine->kptr_restrict_warned = true; 1397 return NULL; 1398 } 1399 1400 return machine__resolve_kernel_addr(vmachine, addrp, modp); 1401 } 1402 1403 static int trace__symbols_init(struct trace *trace, struct evlist *evlist) 1404 { 1405 int err = symbol__init(NULL); 1406 1407 if (err) 1408 return err; 1409 1410 trace->host = machine__new_host(); 1411 if (trace->host == NULL) 1412 return -ENOMEM; 1413 1414 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr); 1415 if (err < 0) 1416 goto out; 1417 1418 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target, 1419 evlist->core.threads, trace__tool_process, false, 1420 1); 1421 out: 1422 if (err) 1423 symbol__exit(); 1424 1425 return err; 1426 } 1427 1428 static void trace__symbols__exit(struct trace *trace) 1429 { 1430 machine__exit(trace->host); 1431 trace->host = NULL; 1432 1433 symbol__exit(); 1434 } 1435 1436 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) 1437 { 1438 int idx; 1439 1440 if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0) 1441 nr_args = sc->fmt->nr_args; 1442 1443 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt)); 1444 if (sc->arg_fmt == NULL) 1445 return -1; 1446 1447 for (idx = 0; idx < nr_args; ++idx) { 1448 if (sc->fmt) 1449 sc->arg_fmt[idx] = sc->fmt->arg[idx]; 1450 } 1451 1452 sc->nr_args = nr_args; 1453 return 0; 1454 } 1455 1456 static int syscall__set_arg_fmts(struct syscall *sc) 1457 { 1458 struct tep_format_field *field, *last_field = NULL; 1459 int idx = 0, len; 1460 1461 for (field = sc->args; field; field = field->next, ++idx) { 1462 last_field = field; 1463 1464 if (sc->fmt && sc->fmt->arg[idx].scnprintf) 1465 continue; 1466 1467 len = strlen(field->name); 1468 1469 if (strcmp(field->type, "const char *") == 0 && 1470 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) || 1471 strstr(field->name, "path") != NULL)) 1472 sc->arg_fmt[idx].scnprintf = SCA_FILENAME; 1473 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr")) 1474 sc->arg_fmt[idx].scnprintf = SCA_PTR; 1475 else if (strcmp(field->type, "pid_t") == 0) 1476 sc->arg_fmt[idx].scnprintf = SCA_PID; 1477 else if (strcmp(field->type, "umode_t") == 0) 1478 sc->arg_fmt[idx].scnprintf = SCA_MODE_T; 1479 else if ((strcmp(field->type, "int") == 0 || 1480 strcmp(field->type, "unsigned int") == 0 || 1481 strcmp(field->type, "long") == 0) && 1482 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) { 1483 /* 1484 * /sys/kernel/tracing/events/syscalls/sys_enter* 1485 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c 1486 * 65 int 1487 * 23 unsigned int 1488 * 7 unsigned long 1489 */ 1490 sc->arg_fmt[idx].scnprintf = SCA_FD; 1491 } 1492 } 1493 1494 if (last_field) 1495 sc->args_size = last_field->offset + last_field->size; 1496 1497 return 0; 1498 } 1499 1500 static int trace__read_syscall_info(struct trace *trace, int id) 1501 { 1502 char tp_name[128]; 1503 struct syscall *sc; 1504 const char *name = syscalltbl__name(trace->sctbl, id); 1505 1506 if (trace->syscalls.table == NULL) { 1507 trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc)); 1508 if (trace->syscalls.table == NULL) 1509 return -ENOMEM; 1510 } 1511 1512 sc = trace->syscalls.table + id; 1513 if (sc->nonexistent) 1514 return 0; 1515 1516 if (name == NULL) { 1517 sc->nonexistent = true; 1518 return 0; 1519 } 1520 1521 sc->name = name; 1522 sc->fmt = syscall_fmt__find(sc->name); 1523 1524 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name); 1525 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1526 1527 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) { 1528 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias); 1529 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1530 } 1531 1532 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields)) 1533 return -ENOMEM; 1534 1535 if (IS_ERR(sc->tp_format)) 1536 return PTR_ERR(sc->tp_format); 1537 1538 sc->args = sc->tp_format->format.fields; 1539 /* 1540 * We need to check and discard the first variable '__syscall_nr' 1541 * or 'nr' that mean the syscall number. It is needless here. 1542 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels. 1543 */ 1544 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) { 1545 sc->args = sc->args->next; 1546 --sc->nr_args; 1547 } 1548 1549 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit"); 1550 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat"); 1551 1552 return syscall__set_arg_fmts(sc); 1553 } 1554 1555 static int intcmp(const void *a, const void *b) 1556 { 1557 const int *one = a, *another = b; 1558 1559 return *one - *another; 1560 } 1561 1562 static int trace__validate_ev_qualifier(struct trace *trace) 1563 { 1564 int err = 0; 1565 bool printed_invalid_prefix = false; 1566 struct str_node *pos; 1567 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier); 1568 1569 trace->ev_qualifier_ids.entries = malloc(nr_allocated * 1570 sizeof(trace->ev_qualifier_ids.entries[0])); 1571 1572 if (trace->ev_qualifier_ids.entries == NULL) { 1573 fputs("Error:\tNot enough memory for allocating events qualifier ids\n", 1574 trace->output); 1575 err = -EINVAL; 1576 goto out; 1577 } 1578 1579 strlist__for_each_entry(pos, trace->ev_qualifier) { 1580 const char *sc = pos->s; 1581 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1; 1582 1583 if (id < 0) { 1584 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next); 1585 if (id >= 0) 1586 goto matches; 1587 1588 if (!printed_invalid_prefix) { 1589 pr_debug("Skipping unknown syscalls: "); 1590 printed_invalid_prefix = true; 1591 } else { 1592 pr_debug(", "); 1593 } 1594 1595 pr_debug("%s", sc); 1596 continue; 1597 } 1598 matches: 1599 trace->ev_qualifier_ids.entries[nr_used++] = id; 1600 if (match_next == -1) 1601 continue; 1602 1603 while (1) { 1604 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next); 1605 if (id < 0) 1606 break; 1607 if (nr_allocated == nr_used) { 1608 void *entries; 1609 1610 nr_allocated += 8; 1611 entries = realloc(trace->ev_qualifier_ids.entries, 1612 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0])); 1613 if (entries == NULL) { 1614 err = -ENOMEM; 1615 fputs("\nError:\t Not enough memory for parsing\n", trace->output); 1616 goto out_free; 1617 } 1618 trace->ev_qualifier_ids.entries = entries; 1619 } 1620 trace->ev_qualifier_ids.entries[nr_used++] = id; 1621 } 1622 } 1623 1624 trace->ev_qualifier_ids.nr = nr_used; 1625 qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp); 1626 out: 1627 if (printed_invalid_prefix) 1628 pr_debug("\n"); 1629 return err; 1630 out_free: 1631 zfree(&trace->ev_qualifier_ids.entries); 1632 trace->ev_qualifier_ids.nr = 0; 1633 goto out; 1634 } 1635 1636 static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id) 1637 { 1638 bool in_ev_qualifier; 1639 1640 if (trace->ev_qualifier_ids.nr == 0) 1641 return true; 1642 1643 in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries, 1644 trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL; 1645 1646 if (in_ev_qualifier) 1647 return !trace->not_ev_qualifier; 1648 1649 return trace->not_ev_qualifier; 1650 } 1651 1652 /* 1653 * args is to be interpreted as a series of longs but we need to handle 1654 * 8-byte unaligned accesses. args points to raw_data within the event 1655 * and raw_data is guaranteed to be 8-byte unaligned because it is 1656 * preceded by raw_size which is a u32. So we need to copy args to a temp 1657 * variable to read it. Most notably this avoids extended load instructions 1658 * on unaligned addresses 1659 */ 1660 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx) 1661 { 1662 unsigned long val; 1663 unsigned char *p = arg->args + sizeof(unsigned long) * idx; 1664 1665 memcpy(&val, p, sizeof(val)); 1666 return val; 1667 } 1668 1669 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size, 1670 struct syscall_arg *arg) 1671 { 1672 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name) 1673 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name); 1674 1675 return scnprintf(bf, size, "arg%d: ", arg->idx); 1676 } 1677 1678 /* 1679 * Check if the value is in fact zero, i.e. mask whatever needs masking, such 1680 * as mount 'flags' argument that needs ignoring some magic flag, see comment 1681 * in tools/perf/trace/beauty/mount_flags.c 1682 */ 1683 static unsigned long syscall__mask_val(struct syscall *sc, struct syscall_arg *arg, unsigned long val) 1684 { 1685 if (sc->arg_fmt && sc->arg_fmt[arg->idx].mask_val) 1686 return sc->arg_fmt[arg->idx].mask_val(arg, val); 1687 1688 return val; 1689 } 1690 1691 static size_t syscall__scnprintf_val(struct syscall *sc, char *bf, size_t size, 1692 struct syscall_arg *arg, unsigned long val) 1693 { 1694 if (sc->arg_fmt && sc->arg_fmt[arg->idx].scnprintf) { 1695 arg->val = val; 1696 if (sc->arg_fmt[arg->idx].parm) 1697 arg->parm = sc->arg_fmt[arg->idx].parm; 1698 return sc->arg_fmt[arg->idx].scnprintf(bf, size, arg); 1699 } 1700 return scnprintf(bf, size, "%ld", val); 1701 } 1702 1703 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, 1704 unsigned char *args, void *augmented_args, int augmented_args_size, 1705 struct trace *trace, struct thread *thread) 1706 { 1707 size_t printed = 0; 1708 unsigned long val; 1709 u8 bit = 1; 1710 struct syscall_arg arg = { 1711 .args = args, 1712 .augmented = { 1713 .size = augmented_args_size, 1714 .args = augmented_args, 1715 }, 1716 .idx = 0, 1717 .mask = 0, 1718 .trace = trace, 1719 .thread = thread, 1720 .show_string_prefix = trace->show_string_prefix, 1721 }; 1722 struct thread_trace *ttrace = thread__priv(thread); 1723 1724 /* 1725 * Things like fcntl will set this in its 'cmd' formatter to pick the 1726 * right formatter for the return value (an fd? file flags?), which is 1727 * not needed for syscalls that always return a given type, say an fd. 1728 */ 1729 ttrace->ret_scnprintf = NULL; 1730 1731 if (sc->args != NULL) { 1732 struct tep_format_field *field; 1733 1734 for (field = sc->args; field; 1735 field = field->next, ++arg.idx, bit <<= 1) { 1736 if (arg.mask & bit) 1737 continue; 1738 1739 val = syscall_arg__val(&arg, arg.idx); 1740 /* 1741 * Some syscall args need some mask, most don't and 1742 * return val untouched. 1743 */ 1744 val = syscall__mask_val(sc, &arg, val); 1745 1746 /* 1747 * Suppress this argument if its value is zero and 1748 * and we don't have a string associated in an 1749 * strarray for it. 1750 */ 1751 if (val == 0 && 1752 !trace->show_zeros && 1753 !(sc->arg_fmt && 1754 (sc->arg_fmt[arg.idx].show_zero || 1755 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY || 1756 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) && 1757 sc->arg_fmt[arg.idx].parm)) 1758 continue; 1759 1760 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); 1761 1762 if (trace->show_arg_names) 1763 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); 1764 1765 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val); 1766 } 1767 } else if (IS_ERR(sc->tp_format)) { 1768 /* 1769 * If we managed to read the tracepoint /format file, then we 1770 * may end up not having any args, like with gettid(), so only 1771 * print the raw args when we didn't manage to read it. 1772 */ 1773 while (arg.idx < sc->nr_args) { 1774 if (arg.mask & bit) 1775 goto next_arg; 1776 val = syscall_arg__val(&arg, arg.idx); 1777 if (printed) 1778 printed += scnprintf(bf + printed, size - printed, ", "); 1779 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg); 1780 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val); 1781 next_arg: 1782 ++arg.idx; 1783 bit <<= 1; 1784 } 1785 } 1786 1787 return printed; 1788 } 1789 1790 typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel, 1791 union perf_event *event, 1792 struct perf_sample *sample); 1793 1794 static struct syscall *trace__syscall_info(struct trace *trace, 1795 struct evsel *evsel, int id) 1796 { 1797 int err = 0; 1798 1799 if (id < 0) { 1800 1801 /* 1802 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried 1803 * before that, leaving at a higher verbosity level till that is 1804 * explained. Reproduced with plain ftrace with: 1805 * 1806 * echo 1 > /t/events/raw_syscalls/sys_exit/enable 1807 * grep "NR -1 " /t/trace_pipe 1808 * 1809 * After generating some load on the machine. 1810 */ 1811 if (verbose > 1) { 1812 static u64 n; 1813 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n", 1814 id, perf_evsel__name(evsel), ++n); 1815 } 1816 return NULL; 1817 } 1818 1819 err = -EINVAL; 1820 1821 if (id > trace->sctbl->syscalls.max_id) 1822 goto out_cant_read; 1823 1824 if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) && 1825 (err = trace__read_syscall_info(trace, id)) != 0) 1826 goto out_cant_read; 1827 1828 if (trace->syscalls.table[id].name == NULL) { 1829 if (trace->syscalls.table[id].nonexistent) 1830 return NULL; 1831 goto out_cant_read; 1832 } 1833 1834 return &trace->syscalls.table[id]; 1835 1836 out_cant_read: 1837 if (verbose > 0) { 1838 char sbuf[STRERR_BUFSIZE]; 1839 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf))); 1840 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL) 1841 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name); 1842 fputs(" information\n", trace->output); 1843 } 1844 return NULL; 1845 } 1846 1847 static void thread__update_stats(struct thread_trace *ttrace, 1848 int id, struct perf_sample *sample) 1849 { 1850 struct int_node *inode; 1851 struct stats *stats; 1852 u64 duration = 0; 1853 1854 inode = intlist__findnew(ttrace->syscall_stats, id); 1855 if (inode == NULL) 1856 return; 1857 1858 stats = inode->priv; 1859 if (stats == NULL) { 1860 stats = malloc(sizeof(struct stats)); 1861 if (stats == NULL) 1862 return; 1863 init_stats(stats); 1864 inode->priv = stats; 1865 } 1866 1867 if (ttrace->entry_time && sample->time > ttrace->entry_time) 1868 duration = sample->time - ttrace->entry_time; 1869 1870 update_stats(stats, duration); 1871 } 1872 1873 static int trace__printf_interrupted_entry(struct trace *trace) 1874 { 1875 struct thread_trace *ttrace; 1876 size_t printed; 1877 int len; 1878 1879 if (trace->failure_only || trace->current == NULL) 1880 return 0; 1881 1882 ttrace = thread__priv(trace->current); 1883 1884 if (!ttrace->entry_pending) 1885 return 0; 1886 1887 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output); 1888 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str); 1889 1890 if (len < trace->args_alignment - 4) 1891 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " "); 1892 1893 printed += fprintf(trace->output, " ...\n"); 1894 1895 ttrace->entry_pending = false; 1896 ++trace->nr_events_printed; 1897 1898 return printed; 1899 } 1900 1901 static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel, 1902 struct perf_sample *sample, struct thread *thread) 1903 { 1904 int printed = 0; 1905 1906 if (trace->print_sample) { 1907 double ts = (double)sample->time / NSEC_PER_MSEC; 1908 1909 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n", 1910 perf_evsel__name(evsel), ts, 1911 thread__comm_str(thread), 1912 sample->pid, sample->tid, sample->cpu); 1913 } 1914 1915 return printed; 1916 } 1917 1918 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size) 1919 { 1920 void *augmented_args = NULL; 1921 /* 1922 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter 1923 * and there we get all 6 syscall args plus the tracepoint common fields 1924 * that gets calculated at the start and the syscall_nr (another long). 1925 * So we check if that is the case and if so don't look after the 1926 * sc->args_size but always after the full raw_syscalls:sys_enter payload, 1927 * which is fixed. 1928 * 1929 * We'll revisit this later to pass s->args_size to the BPF augmenter 1930 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it 1931 * copies only what we need for each syscall, like what happens when we 1932 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace 1933 * traffic to just what is needed for each syscall. 1934 */ 1935 int args_size = raw_augmented_args_size ?: sc->args_size; 1936 1937 *augmented_args_size = sample->raw_size - args_size; 1938 if (*augmented_args_size > 0) 1939 augmented_args = sample->raw_data + args_size; 1940 1941 return augmented_args; 1942 } 1943 1944 static int trace__sys_enter(struct trace *trace, struct evsel *evsel, 1945 union perf_event *event __maybe_unused, 1946 struct perf_sample *sample) 1947 { 1948 char *msg; 1949 void *args; 1950 int printed = 0; 1951 struct thread *thread; 1952 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 1953 int augmented_args_size = 0; 1954 void *augmented_args = NULL; 1955 struct syscall *sc = trace__syscall_info(trace, evsel, id); 1956 struct thread_trace *ttrace; 1957 1958 if (sc == NULL) 1959 return -1; 1960 1961 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 1962 ttrace = thread__trace(thread, trace->output); 1963 if (ttrace == NULL) 1964 goto out_put; 1965 1966 trace__fprintf_sample(trace, evsel, sample, thread); 1967 1968 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 1969 1970 if (ttrace->entry_str == NULL) { 1971 ttrace->entry_str = malloc(trace__entry_str_size); 1972 if (!ttrace->entry_str) 1973 goto out_put; 1974 } 1975 1976 if (!(trace->duration_filter || trace->summary_only || trace->min_stack)) 1977 trace__printf_interrupted_entry(trace); 1978 /* 1979 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible 1980 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments 1981 * this breaks syscall__augmented_args() check for augmented args, as we calculate 1982 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file, 1983 * so when handling, say the openat syscall, we end up getting 6 args for the 1984 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly 1985 * thinking that the extra 2 u64 args are the augmented filename, so just check 1986 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one. 1987 */ 1988 if (evsel != trace->syscalls.events.sys_enter) 1989 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 1990 ttrace->entry_time = sample->time; 1991 msg = ttrace->entry_str; 1992 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name); 1993 1994 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed, 1995 args, augmented_args, augmented_args_size, trace, thread); 1996 1997 if (sc->is_exit) { 1998 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) { 1999 int alignment = 0; 2000 2001 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output); 2002 printed = fprintf(trace->output, "%s)", ttrace->entry_str); 2003 if (trace->args_alignment > printed) 2004 alignment = trace->args_alignment - printed; 2005 fprintf(trace->output, "%*s= ?\n", alignment, " "); 2006 } 2007 } else { 2008 ttrace->entry_pending = true; 2009 /* See trace__vfs_getname & trace__sys_exit */ 2010 ttrace->filename.pending_open = false; 2011 } 2012 2013 if (trace->current != thread) { 2014 thread__put(trace->current); 2015 trace->current = thread__get(thread); 2016 } 2017 err = 0; 2018 out_put: 2019 thread__put(thread); 2020 return err; 2021 } 2022 2023 static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel, 2024 struct perf_sample *sample) 2025 { 2026 struct thread_trace *ttrace; 2027 struct thread *thread; 2028 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 2029 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2030 char msg[1024]; 2031 void *args, *augmented_args = NULL; 2032 int augmented_args_size; 2033 2034 if (sc == NULL) 2035 return -1; 2036 2037 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2038 ttrace = thread__trace(thread, trace->output); 2039 /* 2040 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args() 2041 * and the rest of the beautifiers accessing it via struct syscall_arg touches it. 2042 */ 2043 if (ttrace == NULL) 2044 goto out_put; 2045 2046 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 2047 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 2048 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread); 2049 fprintf(trace->output, "%s", msg); 2050 err = 0; 2051 out_put: 2052 thread__put(thread); 2053 return err; 2054 } 2055 2056 static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel, 2057 struct perf_sample *sample, 2058 struct callchain_cursor *cursor) 2059 { 2060 struct addr_location al; 2061 int max_stack = evsel->core.attr.sample_max_stack ? 2062 evsel->core.attr.sample_max_stack : 2063 trace->max_stack; 2064 int err; 2065 2066 if (machine__resolve(trace->host, &al, sample) < 0) 2067 return -1; 2068 2069 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack); 2070 addr_location__put(&al); 2071 return err; 2072 } 2073 2074 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample) 2075 { 2076 /* TODO: user-configurable print_opts */ 2077 const unsigned int print_opts = EVSEL__PRINT_SYM | 2078 EVSEL__PRINT_DSO | 2079 EVSEL__PRINT_UNKNOWN_AS_ADDR; 2080 2081 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, symbol_conf.bt_stop_list, trace->output); 2082 } 2083 2084 static const char *errno_to_name(struct evsel *evsel, int err) 2085 { 2086 struct perf_env *env = perf_evsel__env(evsel); 2087 const char *arch_name = perf_env__arch(env); 2088 2089 return arch_syscalls__strerrno(arch_name, err); 2090 } 2091 2092 static int trace__sys_exit(struct trace *trace, struct evsel *evsel, 2093 union perf_event *event __maybe_unused, 2094 struct perf_sample *sample) 2095 { 2096 long ret; 2097 u64 duration = 0; 2098 bool duration_calculated = false; 2099 struct thread *thread; 2100 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0; 2101 int alignment = trace->args_alignment; 2102 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2103 struct thread_trace *ttrace; 2104 2105 if (sc == NULL) 2106 return -1; 2107 2108 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2109 ttrace = thread__trace(thread, trace->output); 2110 if (ttrace == NULL) 2111 goto out_put; 2112 2113 trace__fprintf_sample(trace, evsel, sample, thread); 2114 2115 if (trace->summary) 2116 thread__update_stats(ttrace, id, sample); 2117 2118 ret = perf_evsel__sc_tp_uint(evsel, ret, sample); 2119 2120 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) { 2121 trace__set_fd_pathname(thread, ret, ttrace->filename.name); 2122 ttrace->filename.pending_open = false; 2123 ++trace->stats.vfs_getname; 2124 } 2125 2126 if (ttrace->entry_time) { 2127 duration = sample->time - ttrace->entry_time; 2128 if (trace__filter_duration(trace, duration)) 2129 goto out; 2130 duration_calculated = true; 2131 } else if (trace->duration_filter) 2132 goto out; 2133 2134 if (sample->callchain) { 2135 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2136 if (callchain_ret == 0) { 2137 if (callchain_cursor.nr < trace->min_stack) 2138 goto out; 2139 callchain_ret = 1; 2140 } 2141 } 2142 2143 if (trace->summary_only || (ret >= 0 && trace->failure_only)) 2144 goto out; 2145 2146 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output); 2147 2148 if (ttrace->entry_pending) { 2149 printed = fprintf(trace->output, "%s", ttrace->entry_str); 2150 } else { 2151 printed += fprintf(trace->output, " ... ["); 2152 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued"); 2153 printed += 9; 2154 printed += fprintf(trace->output, "]: %s()", sc->name); 2155 } 2156 2157 printed++; /* the closing ')' */ 2158 2159 if (alignment > printed) 2160 alignment -= printed; 2161 else 2162 alignment = 0; 2163 2164 fprintf(trace->output, ")%*s= ", alignment, " "); 2165 2166 if (sc->fmt == NULL) { 2167 if (ret < 0) 2168 goto errno_print; 2169 signed_print: 2170 fprintf(trace->output, "%ld", ret); 2171 } else if (ret < 0) { 2172 errno_print: { 2173 char bf[STRERR_BUFSIZE]; 2174 const char *emsg = str_error_r(-ret, bf, sizeof(bf)), 2175 *e = errno_to_name(evsel, -ret); 2176 2177 fprintf(trace->output, "-1 %s (%s)", e, emsg); 2178 } 2179 } else if (ret == 0 && sc->fmt->timeout) 2180 fprintf(trace->output, "0 (Timeout)"); 2181 else if (ttrace->ret_scnprintf) { 2182 char bf[1024]; 2183 struct syscall_arg arg = { 2184 .val = ret, 2185 .thread = thread, 2186 .trace = trace, 2187 }; 2188 ttrace->ret_scnprintf(bf, sizeof(bf), &arg); 2189 ttrace->ret_scnprintf = NULL; 2190 fprintf(trace->output, "%s", bf); 2191 } else if (sc->fmt->hexret) 2192 fprintf(trace->output, "%#lx", ret); 2193 else if (sc->fmt->errpid) { 2194 struct thread *child = machine__find_thread(trace->host, ret, ret); 2195 2196 if (child != NULL) { 2197 fprintf(trace->output, "%ld", ret); 2198 if (child->comm_set) 2199 fprintf(trace->output, " (%s)", thread__comm_str(child)); 2200 thread__put(child); 2201 } 2202 } else 2203 goto signed_print; 2204 2205 fputc('\n', trace->output); 2206 2207 /* 2208 * We only consider an 'event' for the sake of --max-events a non-filtered 2209 * sys_enter + sys_exit and other tracepoint events. 2210 */ 2211 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX) 2212 interrupted = true; 2213 2214 if (callchain_ret > 0) 2215 trace__fprintf_callchain(trace, sample); 2216 else if (callchain_ret < 0) 2217 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); 2218 out: 2219 ttrace->entry_pending = false; 2220 err = 0; 2221 out_put: 2222 thread__put(thread); 2223 return err; 2224 } 2225 2226 static int trace__vfs_getname(struct trace *trace, struct evsel *evsel, 2227 union perf_event *event __maybe_unused, 2228 struct perf_sample *sample) 2229 { 2230 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2231 struct thread_trace *ttrace; 2232 size_t filename_len, entry_str_len, to_move; 2233 ssize_t remaining_space; 2234 char *pos; 2235 const char *filename = perf_evsel__rawptr(evsel, sample, "pathname"); 2236 2237 if (!thread) 2238 goto out; 2239 2240 ttrace = thread__priv(thread); 2241 if (!ttrace) 2242 goto out_put; 2243 2244 filename_len = strlen(filename); 2245 if (filename_len == 0) 2246 goto out_put; 2247 2248 if (ttrace->filename.namelen < filename_len) { 2249 char *f = realloc(ttrace->filename.name, filename_len + 1); 2250 2251 if (f == NULL) 2252 goto out_put; 2253 2254 ttrace->filename.namelen = filename_len; 2255 ttrace->filename.name = f; 2256 } 2257 2258 strcpy(ttrace->filename.name, filename); 2259 ttrace->filename.pending_open = true; 2260 2261 if (!ttrace->filename.ptr) 2262 goto out_put; 2263 2264 entry_str_len = strlen(ttrace->entry_str); 2265 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */ 2266 if (remaining_space <= 0) 2267 goto out_put; 2268 2269 if (filename_len > (size_t)remaining_space) { 2270 filename += filename_len - remaining_space; 2271 filename_len = remaining_space; 2272 } 2273 2274 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */ 2275 pos = ttrace->entry_str + ttrace->filename.entry_str_pos; 2276 memmove(pos + filename_len, pos, to_move); 2277 memcpy(pos, filename, filename_len); 2278 2279 ttrace->filename.ptr = 0; 2280 ttrace->filename.entry_str_pos = 0; 2281 out_put: 2282 thread__put(thread); 2283 out: 2284 return 0; 2285 } 2286 2287 static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel, 2288 union perf_event *event __maybe_unused, 2289 struct perf_sample *sample) 2290 { 2291 u64 runtime = perf_evsel__intval(evsel, sample, "runtime"); 2292 double runtime_ms = (double)runtime / NSEC_PER_MSEC; 2293 struct thread *thread = machine__findnew_thread(trace->host, 2294 sample->pid, 2295 sample->tid); 2296 struct thread_trace *ttrace = thread__trace(thread, trace->output); 2297 2298 if (ttrace == NULL) 2299 goto out_dump; 2300 2301 ttrace->runtime_ms += runtime_ms; 2302 trace->runtime_ms += runtime_ms; 2303 out_put: 2304 thread__put(thread); 2305 return 0; 2306 2307 out_dump: 2308 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n", 2309 evsel->name, 2310 perf_evsel__strval(evsel, sample, "comm"), 2311 (pid_t)perf_evsel__intval(evsel, sample, "pid"), 2312 runtime, 2313 perf_evsel__intval(evsel, sample, "vruntime")); 2314 goto out_put; 2315 } 2316 2317 static int bpf_output__printer(enum binary_printer_ops op, 2318 unsigned int val, void *extra __maybe_unused, FILE *fp) 2319 { 2320 unsigned char ch = (unsigned char)val; 2321 2322 switch (op) { 2323 case BINARY_PRINT_CHAR_DATA: 2324 return fprintf(fp, "%c", isprint(ch) ? ch : '.'); 2325 case BINARY_PRINT_DATA_BEGIN: 2326 case BINARY_PRINT_LINE_BEGIN: 2327 case BINARY_PRINT_ADDR: 2328 case BINARY_PRINT_NUM_DATA: 2329 case BINARY_PRINT_NUM_PAD: 2330 case BINARY_PRINT_SEP: 2331 case BINARY_PRINT_CHAR_PAD: 2332 case BINARY_PRINT_LINE_END: 2333 case BINARY_PRINT_DATA_END: 2334 default: 2335 break; 2336 } 2337 2338 return 0; 2339 } 2340 2341 static void bpf_output__fprintf(struct trace *trace, 2342 struct perf_sample *sample) 2343 { 2344 binary__fprintf(sample->raw_data, sample->raw_size, 8, 2345 bpf_output__printer, NULL, trace->output); 2346 ++trace->nr_events_printed; 2347 } 2348 2349 static int trace__event_handler(struct trace *trace, struct evsel *evsel, 2350 union perf_event *event __maybe_unused, 2351 struct perf_sample *sample) 2352 { 2353 struct thread *thread; 2354 int callchain_ret = 0; 2355 /* 2356 * Check if we called perf_evsel__disable(evsel) due to, for instance, 2357 * this event's max_events having been hit and this is an entry coming 2358 * from the ring buffer that we should discard, since the max events 2359 * have already been considered/printed. 2360 */ 2361 if (evsel->disabled) 2362 return 0; 2363 2364 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2365 2366 if (sample->callchain) { 2367 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2368 if (callchain_ret == 0) { 2369 if (callchain_cursor.nr < trace->min_stack) 2370 goto out; 2371 callchain_ret = 1; 2372 } 2373 } 2374 2375 trace__printf_interrupted_entry(trace); 2376 trace__fprintf_tstamp(trace, sample->time, trace->output); 2377 2378 if (trace->trace_syscalls && trace->show_duration) 2379 fprintf(trace->output, "( ): "); 2380 2381 if (thread) 2382 trace__fprintf_comm_tid(trace, thread, trace->output); 2383 2384 if (evsel == trace->syscalls.events.augmented) { 2385 int id = perf_evsel__sc_tp_uint(evsel, id, sample); 2386 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2387 2388 if (sc) { 2389 fprintf(trace->output, "%s(", sc->name); 2390 trace__fprintf_sys_enter(trace, evsel, sample); 2391 fputc(')', trace->output); 2392 goto newline; 2393 } 2394 2395 /* 2396 * XXX: Not having the associated syscall info or not finding/adding 2397 * the thread should never happen, but if it does... 2398 * fall thru and print it as a bpf_output event. 2399 */ 2400 } 2401 2402 fprintf(trace->output, "%s:", evsel->name); 2403 2404 if (perf_evsel__is_bpf_output(evsel)) { 2405 bpf_output__fprintf(trace, sample); 2406 } else if (evsel->tp_format) { 2407 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) || 2408 trace__fprintf_sys_enter(trace, evsel, sample)) { 2409 event_format__fprintf(evsel->tp_format, sample->cpu, 2410 sample->raw_data, sample->raw_size, 2411 trace->output); 2412 ++trace->nr_events_printed; 2413 2414 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) { 2415 evsel__disable(evsel); 2416 evsel__close(evsel); 2417 } 2418 } 2419 } 2420 2421 newline: 2422 fprintf(trace->output, "\n"); 2423 2424 if (callchain_ret > 0) 2425 trace__fprintf_callchain(trace, sample); 2426 else if (callchain_ret < 0) 2427 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); 2428 out: 2429 thread__put(thread); 2430 return 0; 2431 } 2432 2433 static void print_location(FILE *f, struct perf_sample *sample, 2434 struct addr_location *al, 2435 bool print_dso, bool print_sym) 2436 { 2437 2438 if ((verbose > 0 || print_dso) && al->map) 2439 fprintf(f, "%s@", al->map->dso->long_name); 2440 2441 if ((verbose > 0 || print_sym) && al->sym) 2442 fprintf(f, "%s+0x%" PRIx64, al->sym->name, 2443 al->addr - al->sym->start); 2444 else if (al->map) 2445 fprintf(f, "0x%" PRIx64, al->addr); 2446 else 2447 fprintf(f, "0x%" PRIx64, sample->addr); 2448 } 2449 2450 static int trace__pgfault(struct trace *trace, 2451 struct evsel *evsel, 2452 union perf_event *event __maybe_unused, 2453 struct perf_sample *sample) 2454 { 2455 struct thread *thread; 2456 struct addr_location al; 2457 char map_type = 'd'; 2458 struct thread_trace *ttrace; 2459 int err = -1; 2460 int callchain_ret = 0; 2461 2462 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2463 2464 if (sample->callchain) { 2465 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2466 if (callchain_ret == 0) { 2467 if (callchain_cursor.nr < trace->min_stack) 2468 goto out_put; 2469 callchain_ret = 1; 2470 } 2471 } 2472 2473 ttrace = thread__trace(thread, trace->output); 2474 if (ttrace == NULL) 2475 goto out_put; 2476 2477 if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ) 2478 ttrace->pfmaj++; 2479 else 2480 ttrace->pfmin++; 2481 2482 if (trace->summary_only) 2483 goto out; 2484 2485 thread__find_symbol(thread, sample->cpumode, sample->ip, &al); 2486 2487 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output); 2488 2489 fprintf(trace->output, "%sfault [", 2490 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ? 2491 "maj" : "min"); 2492 2493 print_location(trace->output, sample, &al, false, true); 2494 2495 fprintf(trace->output, "] => "); 2496 2497 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2498 2499 if (!al.map) { 2500 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2501 2502 if (al.map) 2503 map_type = 'x'; 2504 else 2505 map_type = '?'; 2506 } 2507 2508 print_location(trace->output, sample, &al, true, false); 2509 2510 fprintf(trace->output, " (%c%c)\n", map_type, al.level); 2511 2512 if (callchain_ret > 0) 2513 trace__fprintf_callchain(trace, sample); 2514 else if (callchain_ret < 0) 2515 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); 2516 2517 ++trace->nr_events_printed; 2518 out: 2519 err = 0; 2520 out_put: 2521 thread__put(thread); 2522 return err; 2523 } 2524 2525 static void trace__set_base_time(struct trace *trace, 2526 struct evsel *evsel, 2527 struct perf_sample *sample) 2528 { 2529 /* 2530 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust 2531 * and don't use sample->time unconditionally, we may end up having 2532 * some other event in the future without PERF_SAMPLE_TIME for good 2533 * reason, i.e. we may not be interested in its timestamps, just in 2534 * it taking place, picking some piece of information when it 2535 * appears in our event stream (vfs_getname comes to mind). 2536 */ 2537 if (trace->base_time == 0 && !trace->full_time && 2538 (evsel->core.attr.sample_type & PERF_SAMPLE_TIME)) 2539 trace->base_time = sample->time; 2540 } 2541 2542 static int trace__process_sample(struct perf_tool *tool, 2543 union perf_event *event, 2544 struct perf_sample *sample, 2545 struct evsel *evsel, 2546 struct machine *machine __maybe_unused) 2547 { 2548 struct trace *trace = container_of(tool, struct trace, tool); 2549 struct thread *thread; 2550 int err = 0; 2551 2552 tracepoint_handler handler = evsel->handler; 2553 2554 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2555 if (thread && thread__is_filtered(thread)) 2556 goto out; 2557 2558 trace__set_base_time(trace, evsel, sample); 2559 2560 if (handler) { 2561 ++trace->nr_events; 2562 handler(trace, evsel, event, sample); 2563 } 2564 out: 2565 thread__put(thread); 2566 return err; 2567 } 2568 2569 static int trace__record(struct trace *trace, int argc, const char **argv) 2570 { 2571 unsigned int rec_argc, i, j; 2572 const char **rec_argv; 2573 const char * const record_args[] = { 2574 "record", 2575 "-R", 2576 "-m", "1024", 2577 "-c", "1", 2578 }; 2579 2580 const char * const sc_args[] = { "-e", }; 2581 unsigned int sc_args_nr = ARRAY_SIZE(sc_args); 2582 const char * const majpf_args[] = { "-e", "major-faults" }; 2583 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args); 2584 const char * const minpf_args[] = { "-e", "minor-faults" }; 2585 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args); 2586 2587 /* +1 is for the event string below */ 2588 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 + 2589 majpf_args_nr + minpf_args_nr + argc; 2590 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 2591 2592 if (rec_argv == NULL) 2593 return -ENOMEM; 2594 2595 j = 0; 2596 for (i = 0; i < ARRAY_SIZE(record_args); i++) 2597 rec_argv[j++] = record_args[i]; 2598 2599 if (trace->trace_syscalls) { 2600 for (i = 0; i < sc_args_nr; i++) 2601 rec_argv[j++] = sc_args[i]; 2602 2603 /* event string may be different for older kernels - e.g., RHEL6 */ 2604 if (is_valid_tracepoint("raw_syscalls:sys_enter")) 2605 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit"; 2606 else if (is_valid_tracepoint("syscalls:sys_enter")) 2607 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit"; 2608 else { 2609 pr_err("Neither raw_syscalls nor syscalls events exist.\n"); 2610 free(rec_argv); 2611 return -1; 2612 } 2613 } 2614 2615 if (trace->trace_pgfaults & TRACE_PFMAJ) 2616 for (i = 0; i < majpf_args_nr; i++) 2617 rec_argv[j++] = majpf_args[i]; 2618 2619 if (trace->trace_pgfaults & TRACE_PFMIN) 2620 for (i = 0; i < minpf_args_nr; i++) 2621 rec_argv[j++] = minpf_args[i]; 2622 2623 for (i = 0; i < (unsigned int)argc; i++) 2624 rec_argv[j++] = argv[i]; 2625 2626 return cmd_record(j, rec_argv); 2627 } 2628 2629 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp); 2630 2631 static bool evlist__add_vfs_getname(struct evlist *evlist) 2632 { 2633 bool found = false; 2634 struct evsel *evsel, *tmp; 2635 struct parse_events_error err = { .idx = 0, }; 2636 int ret = parse_events(evlist, "probe:vfs_getname*", &err); 2637 2638 if (ret) 2639 return false; 2640 2641 evlist__for_each_entry_safe(evlist, evsel, tmp) { 2642 if (!strstarts(perf_evsel__name(evsel), "probe:vfs_getname")) 2643 continue; 2644 2645 if (perf_evsel__field(evsel, "pathname")) { 2646 evsel->handler = trace__vfs_getname; 2647 found = true; 2648 continue; 2649 } 2650 2651 list_del_init(&evsel->core.node); 2652 evsel->evlist = NULL; 2653 evsel__delete(evsel); 2654 } 2655 2656 return found; 2657 } 2658 2659 static struct evsel *perf_evsel__new_pgfault(u64 config) 2660 { 2661 struct evsel *evsel; 2662 struct perf_event_attr attr = { 2663 .type = PERF_TYPE_SOFTWARE, 2664 .mmap_data = 1, 2665 }; 2666 2667 attr.config = config; 2668 attr.sample_period = 1; 2669 2670 event_attr_init(&attr); 2671 2672 evsel = evsel__new(&attr); 2673 if (evsel) 2674 evsel->handler = trace__pgfault; 2675 2676 return evsel; 2677 } 2678 2679 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample) 2680 { 2681 const u32 type = event->header.type; 2682 struct evsel *evsel; 2683 2684 if (type != PERF_RECORD_SAMPLE) { 2685 trace__process_event(trace, trace->host, event, sample); 2686 return; 2687 } 2688 2689 evsel = perf_evlist__id2evsel(trace->evlist, sample->id); 2690 if (evsel == NULL) { 2691 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id); 2692 return; 2693 } 2694 2695 if (evswitch__discard(&trace->evswitch, evsel)) 2696 return; 2697 2698 trace__set_base_time(trace, evsel, sample); 2699 2700 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT && 2701 sample->raw_data == NULL) { 2702 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n", 2703 perf_evsel__name(evsel), sample->tid, 2704 sample->cpu, sample->raw_size); 2705 } else { 2706 tracepoint_handler handler = evsel->handler; 2707 handler(trace, evsel, event, sample); 2708 } 2709 2710 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX) 2711 interrupted = true; 2712 } 2713 2714 static int trace__add_syscall_newtp(struct trace *trace) 2715 { 2716 int ret = -1; 2717 struct evlist *evlist = trace->evlist; 2718 struct evsel *sys_enter, *sys_exit; 2719 2720 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter); 2721 if (sys_enter == NULL) 2722 goto out; 2723 2724 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args)) 2725 goto out_delete_sys_enter; 2726 2727 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit); 2728 if (sys_exit == NULL) 2729 goto out_delete_sys_enter; 2730 2731 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret)) 2732 goto out_delete_sys_exit; 2733 2734 perf_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param); 2735 perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param); 2736 2737 evlist__add(evlist, sys_enter); 2738 evlist__add(evlist, sys_exit); 2739 2740 if (callchain_param.enabled && !trace->kernel_syscallchains) { 2741 /* 2742 * We're interested only in the user space callchain 2743 * leading to the syscall, allow overriding that for 2744 * debugging reasons using --kernel_syscall_callchains 2745 */ 2746 sys_exit->core.attr.exclude_callchain_kernel = 1; 2747 } 2748 2749 trace->syscalls.events.sys_enter = sys_enter; 2750 trace->syscalls.events.sys_exit = sys_exit; 2751 2752 ret = 0; 2753 out: 2754 return ret; 2755 2756 out_delete_sys_exit: 2757 evsel__delete_priv(sys_exit); 2758 out_delete_sys_enter: 2759 evsel__delete_priv(sys_enter); 2760 goto out; 2761 } 2762 2763 static int trace__set_ev_qualifier_tp_filter(struct trace *trace) 2764 { 2765 int err = -1; 2766 struct evsel *sys_exit; 2767 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier, 2768 trace->ev_qualifier_ids.nr, 2769 trace->ev_qualifier_ids.entries); 2770 2771 if (filter == NULL) 2772 goto out_enomem; 2773 2774 if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter, 2775 filter)) { 2776 sys_exit = trace->syscalls.events.sys_exit; 2777 err = perf_evsel__append_tp_filter(sys_exit, filter); 2778 } 2779 2780 free(filter); 2781 out: 2782 return err; 2783 out_enomem: 2784 errno = ENOMEM; 2785 goto out; 2786 } 2787 2788 #ifdef HAVE_LIBBPF_SUPPORT 2789 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name) 2790 { 2791 if (trace->bpf_obj == NULL) 2792 return NULL; 2793 2794 return bpf_object__find_program_by_title(trace->bpf_obj, name); 2795 } 2796 2797 static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc, 2798 const char *prog_name, const char *type) 2799 { 2800 struct bpf_program *prog; 2801 2802 if (prog_name == NULL) { 2803 char default_prog_name[256]; 2804 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->name); 2805 prog = trace__find_bpf_program_by_title(trace, default_prog_name); 2806 if (prog != NULL) 2807 goto out_found; 2808 if (sc->fmt && sc->fmt->alias) { 2809 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->fmt->alias); 2810 prog = trace__find_bpf_program_by_title(trace, default_prog_name); 2811 if (prog != NULL) 2812 goto out_found; 2813 } 2814 goto out_unaugmented; 2815 } 2816 2817 prog = trace__find_bpf_program_by_title(trace, prog_name); 2818 2819 if (prog != NULL) { 2820 out_found: 2821 return prog; 2822 } 2823 2824 pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n", 2825 prog_name, type, sc->name); 2826 out_unaugmented: 2827 return trace->syscalls.unaugmented_prog; 2828 } 2829 2830 static void trace__init_syscall_bpf_progs(struct trace *trace, int id) 2831 { 2832 struct syscall *sc = trace__syscall_info(trace, NULL, id); 2833 2834 if (sc == NULL) 2835 return; 2836 2837 sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter"); 2838 sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit"); 2839 } 2840 2841 static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id) 2842 { 2843 struct syscall *sc = trace__syscall_info(trace, NULL, id); 2844 return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->syscalls.unaugmented_prog); 2845 } 2846 2847 static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id) 2848 { 2849 struct syscall *sc = trace__syscall_info(trace, NULL, id); 2850 return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->syscalls.unaugmented_prog); 2851 } 2852 2853 static void trace__init_bpf_map_syscall_args(struct trace *trace, int id, struct bpf_map_syscall_entry *entry) 2854 { 2855 struct syscall *sc = trace__syscall_info(trace, NULL, id); 2856 int arg = 0; 2857 2858 if (sc == NULL) 2859 goto out; 2860 2861 for (; arg < sc->nr_args; ++arg) { 2862 entry->string_args_len[arg] = 0; 2863 if (sc->arg_fmt[arg].scnprintf == SCA_FILENAME) { 2864 /* Should be set like strace -s strsize */ 2865 entry->string_args_len[arg] = PATH_MAX; 2866 } 2867 } 2868 out: 2869 for (; arg < 6; ++arg) 2870 entry->string_args_len[arg] = 0; 2871 } 2872 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace) 2873 { 2874 int fd = bpf_map__fd(trace->syscalls.map); 2875 struct bpf_map_syscall_entry value = { 2876 .enabled = !trace->not_ev_qualifier, 2877 }; 2878 int err = 0; 2879 size_t i; 2880 2881 for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) { 2882 int key = trace->ev_qualifier_ids.entries[i]; 2883 2884 if (value.enabled) { 2885 trace__init_bpf_map_syscall_args(trace, key, &value); 2886 trace__init_syscall_bpf_progs(trace, key); 2887 } 2888 2889 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST); 2890 if (err) 2891 break; 2892 } 2893 2894 return err; 2895 } 2896 2897 static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled) 2898 { 2899 int fd = bpf_map__fd(trace->syscalls.map); 2900 struct bpf_map_syscall_entry value = { 2901 .enabled = enabled, 2902 }; 2903 int err = 0, key; 2904 2905 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 2906 if (enabled) 2907 trace__init_bpf_map_syscall_args(trace, key, &value); 2908 2909 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY); 2910 if (err) 2911 break; 2912 } 2913 2914 return err; 2915 } 2916 2917 static int trace__init_syscalls_bpf_map(struct trace *trace) 2918 { 2919 bool enabled = true; 2920 2921 if (trace->ev_qualifier_ids.nr) 2922 enabled = trace->not_ev_qualifier; 2923 2924 return __trace__init_syscalls_bpf_map(trace, enabled); 2925 } 2926 2927 static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc) 2928 { 2929 struct tep_format_field *field, *candidate_field; 2930 int id; 2931 2932 /* 2933 * We're only interested in syscalls that have a pointer: 2934 */ 2935 for (field = sc->args; field; field = field->next) { 2936 if (field->flags & TEP_FIELD_IS_POINTER) 2937 goto try_to_find_pair; 2938 } 2939 2940 return NULL; 2941 2942 try_to_find_pair: 2943 for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) { 2944 struct syscall *pair = trace__syscall_info(trace, NULL, id); 2945 struct bpf_program *pair_prog; 2946 bool is_candidate = false; 2947 2948 if (pair == NULL || pair == sc || 2949 pair->bpf_prog.sys_enter == trace->syscalls.unaugmented_prog) 2950 continue; 2951 2952 for (field = sc->args, candidate_field = pair->args; 2953 field && candidate_field; field = field->next, candidate_field = candidate_field->next) { 2954 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER, 2955 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER; 2956 2957 if (is_pointer) { 2958 if (!candidate_is_pointer) { 2959 // The candidate just doesn't copies our pointer arg, might copy other pointers we want. 2960 continue; 2961 } 2962 } else { 2963 if (candidate_is_pointer) { 2964 // The candidate might copy a pointer we don't have, skip it. 2965 goto next_candidate; 2966 } 2967 continue; 2968 } 2969 2970 if (strcmp(field->type, candidate_field->type)) 2971 goto next_candidate; 2972 2973 is_candidate = true; 2974 } 2975 2976 if (!is_candidate) 2977 goto next_candidate; 2978 2979 /* 2980 * Check if the tentative pair syscall augmenter has more pointers, if it has, 2981 * then it may be collecting that and we then can't use it, as it would collect 2982 * more than what is common to the two syscalls. 2983 */ 2984 if (candidate_field) { 2985 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next) 2986 if (candidate_field->flags & TEP_FIELD_IS_POINTER) 2987 goto next_candidate; 2988 } 2989 2990 pair_prog = pair->bpf_prog.sys_enter; 2991 /* 2992 * If the pair isn't enabled, then its bpf_prog.sys_enter will not 2993 * have been searched for, so search it here and if it returns the 2994 * unaugmented one, then ignore it, otherwise we'll reuse that BPF 2995 * program for a filtered syscall on a non-filtered one. 2996 * 2997 * For instance, we have "!syscalls:sys_enter_renameat" and that is 2998 * useful for "renameat2". 2999 */ 3000 if (pair_prog == NULL) { 3001 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter"); 3002 if (pair_prog == trace->syscalls.unaugmented_prog) 3003 goto next_candidate; 3004 } 3005 3006 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name); 3007 return pair_prog; 3008 next_candidate: 3009 continue; 3010 } 3011 3012 return NULL; 3013 } 3014 3015 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace) 3016 { 3017 int map_enter_fd = bpf_map__fd(trace->syscalls.prog_array.sys_enter), 3018 map_exit_fd = bpf_map__fd(trace->syscalls.prog_array.sys_exit); 3019 int err = 0, key; 3020 3021 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 3022 int prog_fd; 3023 3024 if (!trace__syscall_enabled(trace, key)) 3025 continue; 3026 3027 trace__init_syscall_bpf_progs(trace, key); 3028 3029 // It'll get at least the "!raw_syscalls:unaugmented" 3030 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key); 3031 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY); 3032 if (err) 3033 break; 3034 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key); 3035 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY); 3036 if (err) 3037 break; 3038 } 3039 3040 /* 3041 * Now lets do a second pass looking for enabled syscalls without 3042 * an augmenter that have a signature that is a superset of another 3043 * syscall with an augmenter so that we can auto-reuse it. 3044 * 3045 * I.e. if we have an augmenter for the "open" syscall that has 3046 * this signature: 3047 * 3048 * int open(const char *pathname, int flags, mode_t mode); 3049 * 3050 * I.e. that will collect just the first string argument, then we 3051 * can reuse it for the 'creat' syscall, that has this signature: 3052 * 3053 * int creat(const char *pathname, mode_t mode); 3054 * 3055 * and for: 3056 * 3057 * int stat(const char *pathname, struct stat *statbuf); 3058 * int lstat(const char *pathname, struct stat *statbuf); 3059 * 3060 * Because the 'open' augmenter will collect the first arg as a string, 3061 * and leave alone all the other args, which already helps with 3062 * beautifying 'stat' and 'lstat''s pathname arg. 3063 * 3064 * Then, in time, when 'stat' gets an augmenter that collects both 3065 * first and second arg (this one on the raw_syscalls:sys_exit prog 3066 * array tail call, then that one will be used. 3067 */ 3068 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 3069 struct syscall *sc = trace__syscall_info(trace, NULL, key); 3070 struct bpf_program *pair_prog; 3071 int prog_fd; 3072 3073 if (sc == NULL || sc->bpf_prog.sys_enter == NULL) 3074 continue; 3075 3076 /* 3077 * For now we're just reusing the sys_enter prog, and if it 3078 * already has an augmenter, we don't need to find one. 3079 */ 3080 if (sc->bpf_prog.sys_enter != trace->syscalls.unaugmented_prog) 3081 continue; 3082 3083 /* 3084 * Look at all the other syscalls for one that has a signature 3085 * that is close enough that we can share: 3086 */ 3087 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc); 3088 if (pair_prog == NULL) 3089 continue; 3090 3091 sc->bpf_prog.sys_enter = pair_prog; 3092 3093 /* 3094 * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter 3095 * with the fd for the program we're reusing: 3096 */ 3097 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter); 3098 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY); 3099 if (err) 3100 break; 3101 } 3102 3103 3104 return err; 3105 } 3106 #else 3107 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused) 3108 { 3109 return 0; 3110 } 3111 3112 static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused) 3113 { 3114 return 0; 3115 } 3116 3117 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused, 3118 const char *name __maybe_unused) 3119 { 3120 return NULL; 3121 } 3122 3123 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused) 3124 { 3125 return 0; 3126 } 3127 #endif // HAVE_LIBBPF_SUPPORT 3128 3129 static int trace__set_ev_qualifier_filter(struct trace *trace) 3130 { 3131 if (trace->syscalls.map) 3132 return trace__set_ev_qualifier_bpf_filter(trace); 3133 if (trace->syscalls.events.sys_enter) 3134 return trace__set_ev_qualifier_tp_filter(trace); 3135 return 0; 3136 } 3137 3138 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused, 3139 size_t npids __maybe_unused, pid_t *pids __maybe_unused) 3140 { 3141 int err = 0; 3142 #ifdef HAVE_LIBBPF_SUPPORT 3143 bool value = true; 3144 int map_fd = bpf_map__fd(map); 3145 size_t i; 3146 3147 for (i = 0; i < npids; ++i) { 3148 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY); 3149 if (err) 3150 break; 3151 } 3152 #endif 3153 return err; 3154 } 3155 3156 static int trace__set_filter_loop_pids(struct trace *trace) 3157 { 3158 unsigned int nr = 1, err; 3159 pid_t pids[32] = { 3160 getpid(), 3161 }; 3162 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]); 3163 3164 while (thread && nr < ARRAY_SIZE(pids)) { 3165 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid); 3166 3167 if (parent == NULL) 3168 break; 3169 3170 if (!strcmp(thread__comm_str(parent), "sshd") || 3171 strstarts(thread__comm_str(parent), "gnome-terminal")) { 3172 pids[nr++] = parent->tid; 3173 break; 3174 } 3175 thread = parent; 3176 } 3177 3178 err = perf_evlist__set_tp_filter_pids(trace->evlist, nr, pids); 3179 if (!err && trace->filter_pids.map) 3180 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids); 3181 3182 return err; 3183 } 3184 3185 static int trace__set_filter_pids(struct trace *trace) 3186 { 3187 int err = 0; 3188 /* 3189 * Better not use !target__has_task() here because we need to cover the 3190 * case where no threads were specified in the command line, but a 3191 * workload was, and in that case we will fill in the thread_map when 3192 * we fork the workload in perf_evlist__prepare_workload. 3193 */ 3194 if (trace->filter_pids.nr > 0) { 3195 err = perf_evlist__set_tp_filter_pids(trace->evlist, trace->filter_pids.nr, 3196 trace->filter_pids.entries); 3197 if (!err && trace->filter_pids.map) { 3198 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr, 3199 trace->filter_pids.entries); 3200 } 3201 } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) { 3202 err = trace__set_filter_loop_pids(trace); 3203 } 3204 3205 return err; 3206 } 3207 3208 static int __trace__deliver_event(struct trace *trace, union perf_event *event) 3209 { 3210 struct evlist *evlist = trace->evlist; 3211 struct perf_sample sample; 3212 int err; 3213 3214 err = perf_evlist__parse_sample(evlist, event, &sample); 3215 if (err) 3216 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err); 3217 else 3218 trace__handle_event(trace, event, &sample); 3219 3220 return 0; 3221 } 3222 3223 static int __trace__flush_events(struct trace *trace) 3224 { 3225 u64 first = ordered_events__first_time(&trace->oe.data); 3226 u64 flush = trace->oe.last - NSEC_PER_SEC; 3227 3228 /* Is there some thing to flush.. */ 3229 if (first && first < flush) 3230 return ordered_events__flush_time(&trace->oe.data, flush); 3231 3232 return 0; 3233 } 3234 3235 static int trace__flush_events(struct trace *trace) 3236 { 3237 return !trace->sort_events ? 0 : __trace__flush_events(trace); 3238 } 3239 3240 static int trace__deliver_event(struct trace *trace, union perf_event *event) 3241 { 3242 int err; 3243 3244 if (!trace->sort_events) 3245 return __trace__deliver_event(trace, event); 3246 3247 err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last); 3248 if (err && err != -1) 3249 return err; 3250 3251 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0); 3252 if (err) 3253 return err; 3254 3255 return trace__flush_events(trace); 3256 } 3257 3258 static int ordered_events__deliver_event(struct ordered_events *oe, 3259 struct ordered_event *event) 3260 { 3261 struct trace *trace = container_of(oe, struct trace, oe.data); 3262 3263 return __trace__deliver_event(trace, event->event); 3264 } 3265 3266 static int trace__run(struct trace *trace, int argc, const char **argv) 3267 { 3268 struct evlist *evlist = trace->evlist; 3269 struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL; 3270 int err = -1, i; 3271 unsigned long before; 3272 const bool forks = argc > 0; 3273 bool draining = false; 3274 3275 trace->live = true; 3276 3277 if (!trace->raw_augmented_syscalls) { 3278 if (trace->trace_syscalls && trace__add_syscall_newtp(trace)) 3279 goto out_error_raw_syscalls; 3280 3281 if (trace->trace_syscalls) 3282 trace->vfs_getname = evlist__add_vfs_getname(evlist); 3283 } 3284 3285 if ((trace->trace_pgfaults & TRACE_PFMAJ)) { 3286 pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ); 3287 if (pgfault_maj == NULL) 3288 goto out_error_mem; 3289 perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param); 3290 evlist__add(evlist, pgfault_maj); 3291 } 3292 3293 if ((trace->trace_pgfaults & TRACE_PFMIN)) { 3294 pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN); 3295 if (pgfault_min == NULL) 3296 goto out_error_mem; 3297 perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param); 3298 evlist__add(evlist, pgfault_min); 3299 } 3300 3301 if (trace->sched && 3302 perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime", 3303 trace__sched_stat_runtime)) 3304 goto out_error_sched_stat_runtime; 3305 3306 /* 3307 * If a global cgroup was set, apply it to all the events without an 3308 * explicit cgroup. I.e.: 3309 * 3310 * trace -G A -e sched:*switch 3311 * 3312 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc 3313 * _and_ sched:sched_switch to the 'A' cgroup, while: 3314 * 3315 * trace -e sched:*switch -G A 3316 * 3317 * will only set the sched:sched_switch event to the 'A' cgroup, all the 3318 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without" 3319 * a cgroup (on the root cgroup, sys wide, etc). 3320 * 3321 * Multiple cgroups: 3322 * 3323 * trace -G A -e sched:*switch -G B 3324 * 3325 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes 3326 * to the 'B' cgroup. 3327 * 3328 * evlist__set_default_cgroup() grabs a reference of the passed cgroup 3329 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL. 3330 */ 3331 if (trace->cgroup) 3332 evlist__set_default_cgroup(trace->evlist, trace->cgroup); 3333 3334 err = perf_evlist__create_maps(evlist, &trace->opts.target); 3335 if (err < 0) { 3336 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n"); 3337 goto out_delete_evlist; 3338 } 3339 3340 err = trace__symbols_init(trace, evlist); 3341 if (err < 0) { 3342 fprintf(trace->output, "Problems initializing symbol libraries!\n"); 3343 goto out_delete_evlist; 3344 } 3345 3346 perf_evlist__config(evlist, &trace->opts, &callchain_param); 3347 3348 signal(SIGCHLD, sig_handler); 3349 signal(SIGINT, sig_handler); 3350 3351 if (forks) { 3352 err = perf_evlist__prepare_workload(evlist, &trace->opts.target, 3353 argv, false, NULL); 3354 if (err < 0) { 3355 fprintf(trace->output, "Couldn't run the workload!\n"); 3356 goto out_delete_evlist; 3357 } 3358 } 3359 3360 err = evlist__open(evlist); 3361 if (err < 0) 3362 goto out_error_open; 3363 3364 err = bpf__apply_obj_config(); 3365 if (err) { 3366 char errbuf[BUFSIZ]; 3367 3368 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); 3369 pr_err("ERROR: Apply config to BPF failed: %s\n", 3370 errbuf); 3371 goto out_error_open; 3372 } 3373 3374 err = trace__set_filter_pids(trace); 3375 if (err < 0) 3376 goto out_error_mem; 3377 3378 if (trace->syscalls.map) 3379 trace__init_syscalls_bpf_map(trace); 3380 3381 if (trace->syscalls.prog_array.sys_enter) 3382 trace__init_syscalls_bpf_prog_array_maps(trace); 3383 3384 if (trace->ev_qualifier_ids.nr > 0) { 3385 err = trace__set_ev_qualifier_filter(trace); 3386 if (err < 0) 3387 goto out_errno; 3388 3389 if (trace->syscalls.events.sys_exit) { 3390 pr_debug("event qualifier tracepoint filter: %s\n", 3391 trace->syscalls.events.sys_exit->filter); 3392 } 3393 } 3394 3395 /* 3396 * If the "close" syscall is not traced, then we will not have the 3397 * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the 3398 * fd->pathname table and were ending up showing the last value set by 3399 * syscalls opening a pathname and associating it with a descriptor or 3400 * reading it from /proc/pid/fd/ in cases where that doesn't make 3401 * sense. 3402 * 3403 * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is 3404 * not in use. 3405 */ 3406 trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close")); 3407 3408 err = perf_evlist__apply_filters(evlist, &evsel); 3409 if (err < 0) 3410 goto out_error_apply_filters; 3411 3412 if (trace->dump.map) 3413 bpf_map__fprintf(trace->dump.map, trace->output); 3414 3415 err = evlist__mmap(evlist, trace->opts.mmap_pages); 3416 if (err < 0) 3417 goto out_error_mmap; 3418 3419 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay) 3420 evlist__enable(evlist); 3421 3422 if (forks) 3423 perf_evlist__start_workload(evlist); 3424 3425 if (trace->opts.initial_delay) { 3426 usleep(trace->opts.initial_delay * 1000); 3427 evlist__enable(evlist); 3428 } 3429 3430 trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 || 3431 evlist->core.threads->nr > 1 || 3432 evlist__first(evlist)->core.attr.inherit; 3433 3434 /* 3435 * Now that we already used evsel->core.attr to ask the kernel to setup the 3436 * events, lets reuse evsel->core.attr.sample_max_stack as the limit in 3437 * trace__resolve_callchain(), allowing per-event max-stack settings 3438 * to override an explicitly set --max-stack global setting. 3439 */ 3440 evlist__for_each_entry(evlist, evsel) { 3441 if (evsel__has_callchain(evsel) && 3442 evsel->core.attr.sample_max_stack == 0) 3443 evsel->core.attr.sample_max_stack = trace->max_stack; 3444 } 3445 again: 3446 before = trace->nr_events; 3447 3448 for (i = 0; i < evlist->core.nr_mmaps; i++) { 3449 union perf_event *event; 3450 struct mmap *md; 3451 3452 md = &evlist->mmap[i]; 3453 if (perf_mmap__read_init(md) < 0) 3454 continue; 3455 3456 while ((event = perf_mmap__read_event(md)) != NULL) { 3457 ++trace->nr_events; 3458 3459 err = trace__deliver_event(trace, event); 3460 if (err) 3461 goto out_disable; 3462 3463 perf_mmap__consume(md); 3464 3465 if (interrupted) 3466 goto out_disable; 3467 3468 if (done && !draining) { 3469 evlist__disable(evlist); 3470 draining = true; 3471 } 3472 } 3473 perf_mmap__read_done(md); 3474 } 3475 3476 if (trace->nr_events == before) { 3477 int timeout = done ? 100 : -1; 3478 3479 if (!draining && evlist__poll(evlist, timeout) > 0) { 3480 if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0) 3481 draining = true; 3482 3483 goto again; 3484 } else { 3485 if (trace__flush_events(trace)) 3486 goto out_disable; 3487 } 3488 } else { 3489 goto again; 3490 } 3491 3492 out_disable: 3493 thread__zput(trace->current); 3494 3495 evlist__disable(evlist); 3496 3497 if (trace->sort_events) 3498 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL); 3499 3500 if (!err) { 3501 if (trace->summary) 3502 trace__fprintf_thread_summary(trace, trace->output); 3503 3504 if (trace->show_tool_stats) { 3505 fprintf(trace->output, "Stats:\n " 3506 " vfs_getname : %" PRIu64 "\n" 3507 " proc_getname: %" PRIu64 "\n", 3508 trace->stats.vfs_getname, 3509 trace->stats.proc_getname); 3510 } 3511 } 3512 3513 out_delete_evlist: 3514 trace__symbols__exit(trace); 3515 3516 evlist__delete(evlist); 3517 cgroup__put(trace->cgroup); 3518 trace->evlist = NULL; 3519 trace->live = false; 3520 return err; 3521 { 3522 char errbuf[BUFSIZ]; 3523 3524 out_error_sched_stat_runtime: 3525 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime"); 3526 goto out_error; 3527 3528 out_error_raw_syscalls: 3529 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)"); 3530 goto out_error; 3531 3532 out_error_mmap: 3533 perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf)); 3534 goto out_error; 3535 3536 out_error_open: 3537 perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf)); 3538 3539 out_error: 3540 fprintf(trace->output, "%s\n", errbuf); 3541 goto out_delete_evlist; 3542 3543 out_error_apply_filters: 3544 fprintf(trace->output, 3545 "Failed to set filter \"%s\" on event %s with %d (%s)\n", 3546 evsel->filter, perf_evsel__name(evsel), errno, 3547 str_error_r(errno, errbuf, sizeof(errbuf))); 3548 goto out_delete_evlist; 3549 } 3550 out_error_mem: 3551 fprintf(trace->output, "Not enough memory to run!\n"); 3552 goto out_delete_evlist; 3553 3554 out_errno: 3555 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno)); 3556 goto out_delete_evlist; 3557 } 3558 3559 static int trace__replay(struct trace *trace) 3560 { 3561 const struct evsel_str_handler handlers[] = { 3562 { "probe:vfs_getname", trace__vfs_getname, }, 3563 }; 3564 struct perf_data data = { 3565 .path = input_name, 3566 .mode = PERF_DATA_MODE_READ, 3567 .force = trace->force, 3568 }; 3569 struct perf_session *session; 3570 struct evsel *evsel; 3571 int err = -1; 3572 3573 trace->tool.sample = trace__process_sample; 3574 trace->tool.mmap = perf_event__process_mmap; 3575 trace->tool.mmap2 = perf_event__process_mmap2; 3576 trace->tool.comm = perf_event__process_comm; 3577 trace->tool.exit = perf_event__process_exit; 3578 trace->tool.fork = perf_event__process_fork; 3579 trace->tool.attr = perf_event__process_attr; 3580 trace->tool.tracing_data = perf_event__process_tracing_data; 3581 trace->tool.build_id = perf_event__process_build_id; 3582 trace->tool.namespaces = perf_event__process_namespaces; 3583 3584 trace->tool.ordered_events = true; 3585 trace->tool.ordering_requires_timestamps = true; 3586 3587 /* add tid to output */ 3588 trace->multiple_threads = true; 3589 3590 session = perf_session__new(&data, false, &trace->tool); 3591 if (IS_ERR(session)) 3592 return PTR_ERR(session); 3593 3594 if (trace->opts.target.pid) 3595 symbol_conf.pid_list_str = strdup(trace->opts.target.pid); 3596 3597 if (trace->opts.target.tid) 3598 symbol_conf.tid_list_str = strdup(trace->opts.target.tid); 3599 3600 if (symbol__init(&session->header.env) < 0) 3601 goto out; 3602 3603 trace->host = &session->machines.host; 3604 3605 err = perf_session__set_tracepoints_handlers(session, handlers); 3606 if (err) 3607 goto out; 3608 3609 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3610 "raw_syscalls:sys_enter"); 3611 /* older kernels have syscalls tp versus raw_syscalls */ 3612 if (evsel == NULL) 3613 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3614 "syscalls:sys_enter"); 3615 3616 if (evsel && 3617 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 || 3618 perf_evsel__init_sc_tp_ptr_field(evsel, args))) { 3619 pr_err("Error during initialize raw_syscalls:sys_enter event\n"); 3620 goto out; 3621 } 3622 3623 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3624 "raw_syscalls:sys_exit"); 3625 if (evsel == NULL) 3626 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3627 "syscalls:sys_exit"); 3628 if (evsel && 3629 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 || 3630 perf_evsel__init_sc_tp_uint_field(evsel, ret))) { 3631 pr_err("Error during initialize raw_syscalls:sys_exit event\n"); 3632 goto out; 3633 } 3634 3635 evlist__for_each_entry(session->evlist, evsel) { 3636 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE && 3637 (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ || 3638 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN || 3639 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS)) 3640 evsel->handler = trace__pgfault; 3641 } 3642 3643 setup_pager(); 3644 3645 err = perf_session__process_events(session); 3646 if (err) 3647 pr_err("Failed to process events, error %d", err); 3648 3649 else if (trace->summary) 3650 trace__fprintf_thread_summary(trace, trace->output); 3651 3652 out: 3653 perf_session__delete(session); 3654 3655 return err; 3656 } 3657 3658 static size_t trace__fprintf_threads_header(FILE *fp) 3659 { 3660 size_t printed; 3661 3662 printed = fprintf(fp, "\n Summary of events:\n\n"); 3663 3664 return printed; 3665 } 3666 3667 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs, 3668 struct stats *stats; 3669 double msecs; 3670 int syscall; 3671 ) 3672 { 3673 struct int_node *source = rb_entry(nd, struct int_node, rb_node); 3674 struct stats *stats = source->priv; 3675 3676 entry->syscall = source->i; 3677 entry->stats = stats; 3678 entry->msecs = stats ? (u64)stats->n * (avg_stats(stats) / NSEC_PER_MSEC) : 0; 3679 } 3680 3681 static size_t thread__dump_stats(struct thread_trace *ttrace, 3682 struct trace *trace, FILE *fp) 3683 { 3684 size_t printed = 0; 3685 struct syscall *sc; 3686 struct rb_node *nd; 3687 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats); 3688 3689 if (syscall_stats == NULL) 3690 return 0; 3691 3692 printed += fprintf(fp, "\n"); 3693 3694 printed += fprintf(fp, " syscall calls total min avg max stddev\n"); 3695 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n"); 3696 printed += fprintf(fp, " --------------- -------- --------- --------- --------- --------- ------\n"); 3697 3698 resort_rb__for_each_entry(nd, syscall_stats) { 3699 struct stats *stats = syscall_stats_entry->stats; 3700 if (stats) { 3701 double min = (double)(stats->min) / NSEC_PER_MSEC; 3702 double max = (double)(stats->max) / NSEC_PER_MSEC; 3703 double avg = avg_stats(stats); 3704 double pct; 3705 u64 n = (u64) stats->n; 3706 3707 pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0; 3708 avg /= NSEC_PER_MSEC; 3709 3710 sc = &trace->syscalls.table[syscall_stats_entry->syscall]; 3711 printed += fprintf(fp, " %-15s", sc->name); 3712 printed += fprintf(fp, " %8" PRIu64 " %9.3f %9.3f %9.3f", 3713 n, syscall_stats_entry->msecs, min, avg); 3714 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct); 3715 } 3716 } 3717 3718 resort_rb__delete(syscall_stats); 3719 printed += fprintf(fp, "\n\n"); 3720 3721 return printed; 3722 } 3723 3724 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace) 3725 { 3726 size_t printed = 0; 3727 struct thread_trace *ttrace = thread__priv(thread); 3728 double ratio; 3729 3730 if (ttrace == NULL) 3731 return 0; 3732 3733 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0; 3734 3735 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid); 3736 printed += fprintf(fp, "%lu events, ", ttrace->nr_events); 3737 printed += fprintf(fp, "%.1f%%", ratio); 3738 if (ttrace->pfmaj) 3739 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj); 3740 if (ttrace->pfmin) 3741 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin); 3742 if (trace->sched) 3743 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms); 3744 else if (fputc('\n', fp) != EOF) 3745 ++printed; 3746 3747 printed += thread__dump_stats(ttrace, trace, fp); 3748 3749 return printed; 3750 } 3751 3752 static unsigned long thread__nr_events(struct thread_trace *ttrace) 3753 { 3754 return ttrace ? ttrace->nr_events : 0; 3755 } 3756 3757 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)), 3758 struct thread *thread; 3759 ) 3760 { 3761 entry->thread = rb_entry(nd, struct thread, rb_node); 3762 } 3763 3764 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp) 3765 { 3766 size_t printed = trace__fprintf_threads_header(fp); 3767 struct rb_node *nd; 3768 int i; 3769 3770 for (i = 0; i < THREADS__TABLE_SIZE; i++) { 3771 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i); 3772 3773 if (threads == NULL) { 3774 fprintf(fp, "%s", "Error sorting output by nr_events!\n"); 3775 return 0; 3776 } 3777 3778 resort_rb__for_each_entry(nd, threads) 3779 printed += trace__fprintf_thread(fp, threads_entry->thread, trace); 3780 3781 resort_rb__delete(threads); 3782 } 3783 return printed; 3784 } 3785 3786 static int trace__set_duration(const struct option *opt, const char *str, 3787 int unset __maybe_unused) 3788 { 3789 struct trace *trace = opt->value; 3790 3791 trace->duration_filter = atof(str); 3792 return 0; 3793 } 3794 3795 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str, 3796 int unset __maybe_unused) 3797 { 3798 int ret = -1; 3799 size_t i; 3800 struct trace *trace = opt->value; 3801 /* 3802 * FIXME: introduce a intarray class, plain parse csv and create a 3803 * { int nr, int entries[] } struct... 3804 */ 3805 struct intlist *list = intlist__new(str); 3806 3807 if (list == NULL) 3808 return -1; 3809 3810 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1; 3811 trace->filter_pids.entries = calloc(i, sizeof(pid_t)); 3812 3813 if (trace->filter_pids.entries == NULL) 3814 goto out; 3815 3816 trace->filter_pids.entries[0] = getpid(); 3817 3818 for (i = 1; i < trace->filter_pids.nr; ++i) 3819 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i; 3820 3821 intlist__delete(list); 3822 ret = 0; 3823 out: 3824 return ret; 3825 } 3826 3827 static int trace__open_output(struct trace *trace, const char *filename) 3828 { 3829 struct stat st; 3830 3831 if (!stat(filename, &st) && st.st_size) { 3832 char oldname[PATH_MAX]; 3833 3834 scnprintf(oldname, sizeof(oldname), "%s.old", filename); 3835 unlink(oldname); 3836 rename(filename, oldname); 3837 } 3838 3839 trace->output = fopen(filename, "w"); 3840 3841 return trace->output == NULL ? -errno : 0; 3842 } 3843 3844 static int parse_pagefaults(const struct option *opt, const char *str, 3845 int unset __maybe_unused) 3846 { 3847 int *trace_pgfaults = opt->value; 3848 3849 if (strcmp(str, "all") == 0) 3850 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN; 3851 else if (strcmp(str, "maj") == 0) 3852 *trace_pgfaults |= TRACE_PFMAJ; 3853 else if (strcmp(str, "min") == 0) 3854 *trace_pgfaults |= TRACE_PFMIN; 3855 else 3856 return -1; 3857 3858 return 0; 3859 } 3860 3861 static void evlist__set_evsel_handler(struct evlist *evlist, void *handler) 3862 { 3863 struct evsel *evsel; 3864 3865 evlist__for_each_entry(evlist, evsel) 3866 evsel->handler = handler; 3867 } 3868 3869 static int evlist__set_syscall_tp_fields(struct evlist *evlist) 3870 { 3871 struct evsel *evsel; 3872 3873 evlist__for_each_entry(evlist, evsel) { 3874 if (evsel->priv || !evsel->tp_format) 3875 continue; 3876 3877 if (strcmp(evsel->tp_format->system, "syscalls")) 3878 continue; 3879 3880 if (perf_evsel__init_syscall_tp(evsel)) 3881 return -1; 3882 3883 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) { 3884 struct syscall_tp *sc = evsel->priv; 3885 3886 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64))) 3887 return -1; 3888 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) { 3889 struct syscall_tp *sc = evsel->priv; 3890 3891 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap)) 3892 return -1; 3893 } 3894 } 3895 3896 return 0; 3897 } 3898 3899 /* 3900 * XXX: Hackish, just splitting the combined -e+--event (syscalls 3901 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use 3902 * existing facilities unchanged (trace->ev_qualifier + parse_options()). 3903 * 3904 * It'd be better to introduce a parse_options() variant that would return a 3905 * list with the terms it didn't match to an event... 3906 */ 3907 static int trace__parse_events_option(const struct option *opt, const char *str, 3908 int unset __maybe_unused) 3909 { 3910 struct trace *trace = (struct trace *)opt->value; 3911 const char *s = str; 3912 char *sep = NULL, *lists[2] = { NULL, NULL, }; 3913 int len = strlen(str) + 1, err = -1, list, idx; 3914 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR); 3915 char group_name[PATH_MAX]; 3916 struct syscall_fmt *fmt; 3917 3918 if (strace_groups_dir == NULL) 3919 return -1; 3920 3921 if (*s == '!') { 3922 ++s; 3923 trace->not_ev_qualifier = true; 3924 } 3925 3926 while (1) { 3927 if ((sep = strchr(s, ',')) != NULL) 3928 *sep = '\0'; 3929 3930 list = 0; 3931 if (syscalltbl__id(trace->sctbl, s) >= 0 || 3932 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) { 3933 list = 1; 3934 goto do_concat; 3935 } 3936 3937 fmt = syscall_fmt__find_by_alias(s); 3938 if (fmt != NULL) { 3939 list = 1; 3940 s = fmt->name; 3941 } else { 3942 path__join(group_name, sizeof(group_name), strace_groups_dir, s); 3943 if (access(group_name, R_OK) == 0) 3944 list = 1; 3945 } 3946 do_concat: 3947 if (lists[list]) { 3948 sprintf(lists[list] + strlen(lists[list]), ",%s", s); 3949 } else { 3950 lists[list] = malloc(len); 3951 if (lists[list] == NULL) 3952 goto out; 3953 strcpy(lists[list], s); 3954 } 3955 3956 if (!sep) 3957 break; 3958 3959 *sep = ','; 3960 s = sep + 1; 3961 } 3962 3963 if (lists[1] != NULL) { 3964 struct strlist_config slist_config = { 3965 .dirname = strace_groups_dir, 3966 }; 3967 3968 trace->ev_qualifier = strlist__new(lists[1], &slist_config); 3969 if (trace->ev_qualifier == NULL) { 3970 fputs("Not enough memory to parse event qualifier", trace->output); 3971 goto out; 3972 } 3973 3974 if (trace__validate_ev_qualifier(trace)) 3975 goto out; 3976 trace->trace_syscalls = true; 3977 } 3978 3979 err = 0; 3980 3981 if (lists[0]) { 3982 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event", 3983 "event selector. use 'perf list' to list available events", 3984 parse_events_option); 3985 err = parse_events_option(&o, lists[0], 0); 3986 } 3987 out: 3988 if (sep) 3989 *sep = ','; 3990 3991 return err; 3992 } 3993 3994 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset) 3995 { 3996 struct trace *trace = opt->value; 3997 3998 if (!list_empty(&trace->evlist->core.entries)) 3999 return parse_cgroups(opt, str, unset); 4000 4001 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str); 4002 4003 return 0; 4004 } 4005 4006 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const char *name) 4007 { 4008 if (trace->bpf_obj == NULL) 4009 return NULL; 4010 4011 return bpf_object__find_map_by_name(trace->bpf_obj, name); 4012 } 4013 4014 static void trace__set_bpf_map_filtered_pids(struct trace *trace) 4015 { 4016 trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered"); 4017 } 4018 4019 static void trace__set_bpf_map_syscalls(struct trace *trace) 4020 { 4021 trace->syscalls.map = trace__find_bpf_map_by_name(trace, "syscalls"); 4022 trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter"); 4023 trace->syscalls.prog_array.sys_exit = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit"); 4024 } 4025 4026 static int trace__config(const char *var, const char *value, void *arg) 4027 { 4028 struct trace *trace = arg; 4029 int err = 0; 4030 4031 if (!strcmp(var, "trace.add_events")) { 4032 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event", 4033 "event selector. use 'perf list' to list available events", 4034 parse_events_option); 4035 /* 4036 * We can't propagate parse_event_option() return, as it is 1 4037 * for failure while perf_config() expects -1. 4038 */ 4039 if (parse_events_option(&o, value, 0)) 4040 err = -1; 4041 } else if (!strcmp(var, "trace.show_timestamp")) { 4042 trace->show_tstamp = perf_config_bool(var, value); 4043 } else if (!strcmp(var, "trace.show_duration")) { 4044 trace->show_duration = perf_config_bool(var, value); 4045 } else if (!strcmp(var, "trace.show_arg_names")) { 4046 trace->show_arg_names = perf_config_bool(var, value); 4047 if (!trace->show_arg_names) 4048 trace->show_zeros = true; 4049 } else if (!strcmp(var, "trace.show_zeros")) { 4050 bool new_show_zeros = perf_config_bool(var, value); 4051 if (!trace->show_arg_names && !new_show_zeros) { 4052 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n"); 4053 goto out; 4054 } 4055 trace->show_zeros = new_show_zeros; 4056 } else if (!strcmp(var, "trace.show_prefix")) { 4057 trace->show_string_prefix = perf_config_bool(var, value); 4058 } else if (!strcmp(var, "trace.no_inherit")) { 4059 trace->opts.no_inherit = perf_config_bool(var, value); 4060 } else if (!strcmp(var, "trace.args_alignment")) { 4061 int args_alignment = 0; 4062 if (perf_config_int(&args_alignment, var, value) == 0) 4063 trace->args_alignment = args_alignment; 4064 } 4065 out: 4066 return err; 4067 } 4068 4069 int cmd_trace(int argc, const char **argv) 4070 { 4071 const char *trace_usage[] = { 4072 "perf trace [<options>] [<command>]", 4073 "perf trace [<options>] -- <command> [<options>]", 4074 "perf trace record [<options>] [<command>]", 4075 "perf trace record [<options>] -- <command> [<options>]", 4076 NULL 4077 }; 4078 struct trace trace = { 4079 .opts = { 4080 .target = { 4081 .uid = UINT_MAX, 4082 .uses_mmap = true, 4083 }, 4084 .user_freq = UINT_MAX, 4085 .user_interval = ULLONG_MAX, 4086 .no_buffering = true, 4087 .mmap_pages = UINT_MAX, 4088 }, 4089 .output = stderr, 4090 .show_comm = true, 4091 .show_tstamp = true, 4092 .show_duration = true, 4093 .show_arg_names = true, 4094 .args_alignment = 70, 4095 .trace_syscalls = false, 4096 .kernel_syscallchains = false, 4097 .max_stack = UINT_MAX, 4098 .max_events = ULONG_MAX, 4099 }; 4100 const char *map_dump_str = NULL; 4101 const char *output_name = NULL; 4102 const struct option trace_options[] = { 4103 OPT_CALLBACK('e', "event", &trace, "event", 4104 "event/syscall selector. use 'perf list' to list available events", 4105 trace__parse_events_option), 4106 OPT_BOOLEAN(0, "comm", &trace.show_comm, 4107 "show the thread COMM next to its id"), 4108 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"), 4109 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace", 4110 trace__parse_events_option), 4111 OPT_STRING('o', "output", &output_name, "file", "output file name"), 4112 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"), 4113 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid", 4114 "trace events on existing process id"), 4115 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid", 4116 "trace events on existing thread id"), 4117 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids", 4118 "pids to filter (by the kernel)", trace__set_filter_pids_from_option), 4119 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide, 4120 "system-wide collection from all CPUs"), 4121 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu", 4122 "list of cpus to monitor"), 4123 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit, 4124 "child tasks do not inherit counters"), 4125 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages", 4126 "number of mmap data pages", 4127 perf_evlist__parse_mmap_pages), 4128 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user", 4129 "user to profile"), 4130 OPT_CALLBACK(0, "duration", &trace, "float", 4131 "show only events with duration > N.M ms", 4132 trace__set_duration), 4133 #ifdef HAVE_LIBBPF_SUPPORT 4134 OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"), 4135 #endif 4136 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"), 4137 OPT_INCR('v', "verbose", &verbose, "be more verbose"), 4138 OPT_BOOLEAN('T', "time", &trace.full_time, 4139 "Show full timestamp, not time relative to first start"), 4140 OPT_BOOLEAN(0, "failure", &trace.failure_only, 4141 "Show only syscalls that failed"), 4142 OPT_BOOLEAN('s', "summary", &trace.summary_only, 4143 "Show only syscall summary with statistics"), 4144 OPT_BOOLEAN('S', "with-summary", &trace.summary, 4145 "Show all syscalls and summary with statistics"), 4146 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min", 4147 "Trace pagefaults", parse_pagefaults, "maj"), 4148 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"), 4149 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"), 4150 OPT_CALLBACK(0, "call-graph", &trace.opts, 4151 "record_mode[,record_size]", record_callchain_help, 4152 &record_parse_callchain_opt), 4153 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains, 4154 "Show the kernel callchains on the syscall exit path"), 4155 OPT_ULONG(0, "max-events", &trace.max_events, 4156 "Set the maximum number of events to print, exit after that is reached. "), 4157 OPT_UINTEGER(0, "min-stack", &trace.min_stack, 4158 "Set the minimum stack depth when parsing the callchain, " 4159 "anything below the specified depth will be ignored."), 4160 OPT_UINTEGER(0, "max-stack", &trace.max_stack, 4161 "Set the maximum stack depth when parsing the callchain, " 4162 "anything beyond the specified depth will be ignored. " 4163 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)), 4164 OPT_BOOLEAN(0, "sort-events", &trace.sort_events, 4165 "Sort batch of events before processing, use if getting out of order events"), 4166 OPT_BOOLEAN(0, "print-sample", &trace.print_sample, 4167 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"), 4168 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, 4169 "per thread proc mmap processing timeout in ms"), 4170 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only", 4171 trace__parse_cgroups), 4172 OPT_UINTEGER('D', "delay", &trace.opts.initial_delay, 4173 "ms to wait before starting measurement after program " 4174 "start"), 4175 OPTS_EVSWITCH(&trace.evswitch), 4176 OPT_END() 4177 }; 4178 bool __maybe_unused max_stack_user_set = true; 4179 bool mmap_pages_user_set = true; 4180 struct evsel *evsel; 4181 const char * const trace_subcommands[] = { "record", NULL }; 4182 int err = -1; 4183 char bf[BUFSIZ]; 4184 4185 signal(SIGSEGV, sighandler_dump_stack); 4186 signal(SIGFPE, sighandler_dump_stack); 4187 4188 trace.evlist = evlist__new(); 4189 trace.sctbl = syscalltbl__new(); 4190 4191 if (trace.evlist == NULL || trace.sctbl == NULL) { 4192 pr_err("Not enough memory to run!\n"); 4193 err = -ENOMEM; 4194 goto out; 4195 } 4196 4197 /* 4198 * Parsing .perfconfig may entail creating a BPF event, that may need 4199 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting 4200 * is too small. This affects just this process, not touching the 4201 * global setting. If it fails we'll get something in 'perf trace -v' 4202 * to help diagnose the problem. 4203 */ 4204 rlimit__bump_memlock(); 4205 4206 err = perf_config(trace__config, &trace); 4207 if (err) 4208 goto out; 4209 4210 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands, 4211 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION); 4212 4213 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) { 4214 usage_with_options_msg(trace_usage, trace_options, 4215 "cgroup monitoring only available in system-wide mode"); 4216 } 4217 4218 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__"); 4219 if (IS_ERR(evsel)) { 4220 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf)); 4221 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf); 4222 goto out; 4223 } 4224 4225 if (evsel) { 4226 trace.syscalls.events.augmented = evsel; 4227 4228 evsel = perf_evlist__find_tracepoint_by_name(trace.evlist, "raw_syscalls:sys_enter"); 4229 if (evsel == NULL) { 4230 pr_err("ERROR: raw_syscalls:sys_enter not found in the augmented BPF object\n"); 4231 goto out; 4232 } 4233 4234 if (evsel->bpf_obj == NULL) { 4235 pr_err("ERROR: raw_syscalls:sys_enter not associated to a BPF object\n"); 4236 goto out; 4237 } 4238 4239 trace.bpf_obj = evsel->bpf_obj; 4240 4241 trace__set_bpf_map_filtered_pids(&trace); 4242 trace__set_bpf_map_syscalls(&trace); 4243 trace.syscalls.unaugmented_prog = trace__find_bpf_program_by_title(&trace, "!raw_syscalls:unaugmented"); 4244 } 4245 4246 err = bpf__setup_stdout(trace.evlist); 4247 if (err) { 4248 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf)); 4249 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf); 4250 goto out; 4251 } 4252 4253 err = -1; 4254 4255 if (map_dump_str) { 4256 trace.dump.map = trace__find_bpf_map_by_name(&trace, map_dump_str); 4257 if (trace.dump.map == NULL) { 4258 pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str); 4259 goto out; 4260 } 4261 } 4262 4263 if (trace.trace_pgfaults) { 4264 trace.opts.sample_address = true; 4265 trace.opts.sample_time = true; 4266 } 4267 4268 if (trace.opts.mmap_pages == UINT_MAX) 4269 mmap_pages_user_set = false; 4270 4271 if (trace.max_stack == UINT_MAX) { 4272 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack(); 4273 max_stack_user_set = false; 4274 } 4275 4276 #ifdef HAVE_DWARF_UNWIND_SUPPORT 4277 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) { 4278 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false); 4279 } 4280 #endif 4281 4282 if (callchain_param.enabled) { 4283 if (!mmap_pages_user_set && geteuid() == 0) 4284 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4; 4285 4286 symbol_conf.use_callchain = true; 4287 } 4288 4289 if (trace.evlist->core.nr_entries > 0) { 4290 evlist__set_evsel_handler(trace.evlist, trace__event_handler); 4291 if (evlist__set_syscall_tp_fields(trace.evlist)) { 4292 perror("failed to set syscalls:* tracepoint fields"); 4293 goto out; 4294 } 4295 } 4296 4297 if (trace.sort_events) { 4298 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace); 4299 ordered_events__set_copy_on_queue(&trace.oe.data, true); 4300 } 4301 4302 /* 4303 * If we are augmenting syscalls, then combine what we put in the 4304 * __augmented_syscalls__ BPF map with what is in the 4305 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF, 4306 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit. 4307 * 4308 * We'll switch to look at two BPF maps, one for sys_enter and the 4309 * other for sys_exit when we start augmenting the sys_exit paths with 4310 * buffers that are being copied from kernel to userspace, think 'read' 4311 * syscall. 4312 */ 4313 if (trace.syscalls.events.augmented) { 4314 evlist__for_each_entry(trace.evlist, evsel) { 4315 bool raw_syscalls_sys_exit = strcmp(perf_evsel__name(evsel), "raw_syscalls:sys_exit") == 0; 4316 4317 if (raw_syscalls_sys_exit) { 4318 trace.raw_augmented_syscalls = true; 4319 goto init_augmented_syscall_tp; 4320 } 4321 4322 if (trace.syscalls.events.augmented->priv == NULL && 4323 strstr(perf_evsel__name(evsel), "syscalls:sys_enter")) { 4324 struct evsel *augmented = trace.syscalls.events.augmented; 4325 if (perf_evsel__init_augmented_syscall_tp(augmented, evsel) || 4326 perf_evsel__init_augmented_syscall_tp_args(augmented)) 4327 goto out; 4328 /* 4329 * Augmented is __augmented_syscalls__ BPF_OUTPUT event 4330 * Above we made sure we can get from the payload the tp fields 4331 * that we get from syscalls:sys_enter tracefs format file. 4332 */ 4333 augmented->handler = trace__sys_enter; 4334 /* 4335 * Now we do the same for the *syscalls:sys_enter event so that 4336 * if we handle it directly, i.e. if the BPF prog returns 0 so 4337 * as not to filter it, then we'll handle it just like we would 4338 * for the BPF_OUTPUT one: 4339 */ 4340 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel) || 4341 perf_evsel__init_augmented_syscall_tp_args(evsel)) 4342 goto out; 4343 evsel->handler = trace__sys_enter; 4344 } 4345 4346 if (strstarts(perf_evsel__name(evsel), "syscalls:sys_exit_")) { 4347 struct syscall_tp *sc; 4348 init_augmented_syscall_tp: 4349 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel)) 4350 goto out; 4351 sc = evsel->priv; 4352 /* 4353 * For now with BPF raw_augmented we hook into 4354 * raw_syscalls:sys_enter and there we get all 4355 * 6 syscall args plus the tracepoint common 4356 * fields and the syscall_nr (another long). 4357 * So we check if that is the case and if so 4358 * don't look after the sc->args_size but 4359 * always after the full raw_syscalls:sys_enter 4360 * payload, which is fixed. 4361 * 4362 * We'll revisit this later to pass 4363 * s->args_size to the BPF augmenter (now 4364 * tools/perf/examples/bpf/augmented_raw_syscalls.c, 4365 * so that it copies only what we need for each 4366 * syscall, like what happens when we use 4367 * syscalls:sys_enter_NAME, so that we reduce 4368 * the kernel/userspace traffic to just what is 4369 * needed for each syscall. 4370 */ 4371 if (trace.raw_augmented_syscalls) 4372 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset; 4373 perf_evsel__init_augmented_syscall_tp_ret(evsel); 4374 evsel->handler = trace__sys_exit; 4375 } 4376 } 4377 } 4378 4379 if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) 4380 return trace__record(&trace, argc-1, &argv[1]); 4381 4382 /* summary_only implies summary option, but don't overwrite summary if set */ 4383 if (trace.summary_only) 4384 trace.summary = trace.summary_only; 4385 4386 if (!trace.trace_syscalls && !trace.trace_pgfaults && 4387 trace.evlist->core.nr_entries == 0 /* Was --events used? */) { 4388 trace.trace_syscalls = true; 4389 } 4390 4391 if (output_name != NULL) { 4392 err = trace__open_output(&trace, output_name); 4393 if (err < 0) { 4394 perror("failed to create output file"); 4395 goto out; 4396 } 4397 } 4398 4399 err = evswitch__init(&trace.evswitch, trace.evlist, stderr); 4400 if (err) 4401 goto out_close; 4402 4403 err = target__validate(&trace.opts.target); 4404 if (err) { 4405 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 4406 fprintf(trace.output, "%s", bf); 4407 goto out_close; 4408 } 4409 4410 err = target__parse_uid(&trace.opts.target); 4411 if (err) { 4412 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 4413 fprintf(trace.output, "%s", bf); 4414 goto out_close; 4415 } 4416 4417 if (!argc && target__none(&trace.opts.target)) 4418 trace.opts.target.system_wide = true; 4419 4420 if (input_name) 4421 err = trace__replay(&trace); 4422 else 4423 err = trace__run(&trace, argc, argv); 4424 4425 out_close: 4426 if (output_name != NULL) 4427 fclose(trace.output); 4428 out: 4429 return err; 4430 } 4431