1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * builtin-trace.c 4 * 5 * Builtin 'trace' command: 6 * 7 * Display a continuously updated trace of any workload, CPU, specific PID, 8 * system wide, etc. Default format is loosely strace like, but any other 9 * event may be specified using --event. 10 * 11 * Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> 12 * 13 * Initially based on the 'trace' prototype by Thomas Gleixner: 14 * 15 * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'") 16 */ 17 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/env.h" 29 #include "util/event.h" 30 #include "util/evlist.h" 31 #include <subcmd/exec-cmd.h> 32 #include "util/machine.h" 33 #include "util/map.h" 34 #include "util/symbol.h" 35 #include "util/path.h" 36 #include "util/session.h" 37 #include "util/thread.h" 38 #include <subcmd/parse-options.h> 39 #include "util/strlist.h" 40 #include "util/intlist.h" 41 #include "util/thread_map.h" 42 #include "util/stat.h" 43 #include "trace/beauty/beauty.h" 44 #include "trace-event.h" 45 #include "util/parse-events.h" 46 #include "util/bpf-loader.h" 47 #include "callchain.h" 48 #include "print_binary.h" 49 #include "string2.h" 50 #include "syscalltbl.h" 51 #include "rb_resort.h" 52 53 #include <errno.h> 54 #include <inttypes.h> 55 #include <poll.h> 56 #include <signal.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <linux/err.h> 60 #include <linux/filter.h> 61 #include <linux/kernel.h> 62 #include <linux/random.h> 63 #include <linux/stringify.h> 64 #include <linux/time64.h> 65 #include <linux/zalloc.h> 66 #include <fcntl.h> 67 #include <sys/sysmacros.h> 68 69 #include <linux/ctype.h> 70 71 #ifndef O_CLOEXEC 72 # define O_CLOEXEC 02000000 73 #endif 74 75 #ifndef F_LINUX_SPECIFIC_BASE 76 # define F_LINUX_SPECIFIC_BASE 1024 77 #endif 78 79 struct trace { 80 struct perf_tool tool; 81 struct syscalltbl *sctbl; 82 struct { 83 int max; 84 struct syscall *table; 85 struct bpf_map *map; 86 struct { 87 struct perf_evsel *sys_enter, 88 *sys_exit, 89 *augmented; 90 } events; 91 } syscalls; 92 struct { 93 struct bpf_map *map; 94 } dump; 95 struct record_opts opts; 96 struct perf_evlist *evlist; 97 struct machine *host; 98 struct thread *current; 99 struct cgroup *cgroup; 100 u64 base_time; 101 FILE *output; 102 unsigned long nr_events; 103 unsigned long nr_events_printed; 104 unsigned long max_events; 105 struct strlist *ev_qualifier; 106 struct { 107 size_t nr; 108 int *entries; 109 } ev_qualifier_ids; 110 struct { 111 size_t nr; 112 pid_t *entries; 113 struct bpf_map *map; 114 } filter_pids; 115 double duration_filter; 116 double runtime_ms; 117 struct { 118 u64 vfs_getname, 119 proc_getname; 120 } stats; 121 unsigned int max_stack; 122 unsigned int min_stack; 123 int raw_augmented_syscalls_args_size; 124 bool raw_augmented_syscalls; 125 bool sort_events; 126 bool not_ev_qualifier; 127 bool live; 128 bool full_time; 129 bool sched; 130 bool multiple_threads; 131 bool summary; 132 bool summary_only; 133 bool failure_only; 134 bool show_comm; 135 bool print_sample; 136 bool show_tool_stats; 137 bool trace_syscalls; 138 bool kernel_syscallchains; 139 s16 args_alignment; 140 bool show_tstamp; 141 bool show_duration; 142 bool show_zeros; 143 bool show_arg_names; 144 bool show_string_prefix; 145 bool force; 146 bool vfs_getname; 147 int trace_pgfaults; 148 struct { 149 struct ordered_events data; 150 u64 last; 151 } oe; 152 }; 153 154 struct tp_field { 155 int offset; 156 union { 157 u64 (*integer)(struct tp_field *field, struct perf_sample *sample); 158 void *(*pointer)(struct tp_field *field, struct perf_sample *sample); 159 }; 160 }; 161 162 #define TP_UINT_FIELD(bits) \ 163 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \ 164 { \ 165 u##bits value; \ 166 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 167 return value; \ 168 } 169 170 TP_UINT_FIELD(8); 171 TP_UINT_FIELD(16); 172 TP_UINT_FIELD(32); 173 TP_UINT_FIELD(64); 174 175 #define TP_UINT_FIELD__SWAPPED(bits) \ 176 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \ 177 { \ 178 u##bits value; \ 179 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 180 return bswap_##bits(value);\ 181 } 182 183 TP_UINT_FIELD__SWAPPED(16); 184 TP_UINT_FIELD__SWAPPED(32); 185 TP_UINT_FIELD__SWAPPED(64); 186 187 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap) 188 { 189 field->offset = offset; 190 191 switch (size) { 192 case 1: 193 field->integer = tp_field__u8; 194 break; 195 case 2: 196 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16; 197 break; 198 case 4: 199 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32; 200 break; 201 case 8: 202 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64; 203 break; 204 default: 205 return -1; 206 } 207 208 return 0; 209 } 210 211 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap) 212 { 213 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap); 214 } 215 216 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample) 217 { 218 return sample->raw_data + field->offset; 219 } 220 221 static int __tp_field__init_ptr(struct tp_field *field, int offset) 222 { 223 field->offset = offset; 224 field->pointer = tp_field__ptr; 225 return 0; 226 } 227 228 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field) 229 { 230 return __tp_field__init_ptr(field, format_field->offset); 231 } 232 233 struct syscall_tp { 234 struct tp_field id; 235 union { 236 struct tp_field args, ret; 237 }; 238 }; 239 240 static int perf_evsel__init_tp_uint_field(struct perf_evsel *evsel, 241 struct tp_field *field, 242 const char *name) 243 { 244 struct tep_format_field *format_field = perf_evsel__field(evsel, name); 245 246 if (format_field == NULL) 247 return -1; 248 249 return tp_field__init_uint(field, format_field, evsel->needs_swap); 250 } 251 252 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \ 253 ({ struct syscall_tp *sc = evsel->priv;\ 254 perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); }) 255 256 static int perf_evsel__init_tp_ptr_field(struct perf_evsel *evsel, 257 struct tp_field *field, 258 const char *name) 259 { 260 struct tep_format_field *format_field = perf_evsel__field(evsel, name); 261 262 if (format_field == NULL) 263 return -1; 264 265 return tp_field__init_ptr(field, format_field); 266 } 267 268 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \ 269 ({ struct syscall_tp *sc = evsel->priv;\ 270 perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); }) 271 272 static void perf_evsel__delete_priv(struct perf_evsel *evsel) 273 { 274 zfree(&evsel->priv); 275 perf_evsel__delete(evsel); 276 } 277 278 static int perf_evsel__init_syscall_tp(struct perf_evsel *evsel) 279 { 280 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp)); 281 282 if (evsel->priv != NULL) { 283 if (perf_evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") && 284 perf_evsel__init_tp_uint_field(evsel, &sc->id, "nr")) 285 goto out_delete; 286 return 0; 287 } 288 289 return -ENOMEM; 290 out_delete: 291 zfree(&evsel->priv); 292 return -ENOENT; 293 } 294 295 static int perf_evsel__init_augmented_syscall_tp(struct perf_evsel *evsel, struct perf_evsel *tp) 296 { 297 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp)); 298 299 if (evsel->priv != NULL) { 300 struct tep_format_field *syscall_id = perf_evsel__field(tp, "id"); 301 if (syscall_id == NULL) 302 syscall_id = perf_evsel__field(tp, "__syscall_nr"); 303 if (syscall_id == NULL) 304 goto out_delete; 305 if (__tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap)) 306 goto out_delete; 307 308 return 0; 309 } 310 311 return -ENOMEM; 312 out_delete: 313 zfree(&evsel->priv); 314 return -EINVAL; 315 } 316 317 static int perf_evsel__init_augmented_syscall_tp_args(struct perf_evsel *evsel) 318 { 319 struct syscall_tp *sc = evsel->priv; 320 321 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)); 322 } 323 324 static int perf_evsel__init_augmented_syscall_tp_ret(struct perf_evsel *evsel) 325 { 326 struct syscall_tp *sc = evsel->priv; 327 328 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap); 329 } 330 331 static int perf_evsel__init_raw_syscall_tp(struct perf_evsel *evsel, void *handler) 332 { 333 evsel->priv = malloc(sizeof(struct syscall_tp)); 334 if (evsel->priv != NULL) { 335 if (perf_evsel__init_sc_tp_uint_field(evsel, id)) 336 goto out_delete; 337 338 evsel->handler = handler; 339 return 0; 340 } 341 342 return -ENOMEM; 343 344 out_delete: 345 zfree(&evsel->priv); 346 return -ENOENT; 347 } 348 349 static struct perf_evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler) 350 { 351 struct perf_evsel *evsel = perf_evsel__newtp("raw_syscalls", direction); 352 353 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */ 354 if (IS_ERR(evsel)) 355 evsel = perf_evsel__newtp("syscalls", direction); 356 357 if (IS_ERR(evsel)) 358 return NULL; 359 360 if (perf_evsel__init_raw_syscall_tp(evsel, handler)) 361 goto out_delete; 362 363 return evsel; 364 365 out_delete: 366 perf_evsel__delete_priv(evsel); 367 return NULL; 368 } 369 370 #define perf_evsel__sc_tp_uint(evsel, name, sample) \ 371 ({ struct syscall_tp *fields = evsel->priv; \ 372 fields->name.integer(&fields->name, sample); }) 373 374 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \ 375 ({ struct syscall_tp *fields = evsel->priv; \ 376 fields->name.pointer(&fields->name, sample); }) 377 378 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 379 { 380 int idx = val - sa->offset; 381 382 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { 383 size_t printed = scnprintf(bf, size, intfmt, val); 384 if (show_prefix) 385 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); 386 return printed; 387 } 388 389 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 390 } 391 392 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size, 393 const char *intfmt, 394 struct syscall_arg *arg) 395 { 396 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val); 397 } 398 399 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size, 400 struct syscall_arg *arg) 401 { 402 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg); 403 } 404 405 #define SCA_STRARRAY syscall_arg__scnprintf_strarray 406 407 size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg) 408 { 409 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val); 410 } 411 412 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 413 { 414 size_t printed; 415 int i; 416 417 for (i = 0; i < sas->nr_entries; ++i) { 418 struct strarray *sa = sas->entries[i]; 419 int idx = val - sa->offset; 420 421 if (idx >= 0 && idx < sa->nr_entries) { 422 if (sa->entries[idx] == NULL) 423 break; 424 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 425 } 426 } 427 428 printed = scnprintf(bf, size, intfmt, val); 429 if (show_prefix) 430 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix); 431 return printed; 432 } 433 434 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size, 435 struct syscall_arg *arg) 436 { 437 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val); 438 } 439 440 #ifndef AT_FDCWD 441 #define AT_FDCWD -100 442 #endif 443 444 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size, 445 struct syscall_arg *arg) 446 { 447 int fd = arg->val; 448 const char *prefix = "AT_FD"; 449 450 if (fd == AT_FDCWD) 451 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD"); 452 453 return syscall_arg__scnprintf_fd(bf, size, arg); 454 } 455 456 #define SCA_FDAT syscall_arg__scnprintf_fd_at 457 458 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 459 struct syscall_arg *arg); 460 461 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd 462 463 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg) 464 { 465 return scnprintf(bf, size, "%#lx", arg->val); 466 } 467 468 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg) 469 { 470 if (arg->val == 0) 471 return scnprintf(bf, size, "NULL"); 472 return syscall_arg__scnprintf_hex(bf, size, arg); 473 } 474 475 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg) 476 { 477 return scnprintf(bf, size, "%d", arg->val); 478 } 479 480 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg) 481 { 482 return scnprintf(bf, size, "%ld", arg->val); 483 } 484 485 static const char *bpf_cmd[] = { 486 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM", 487 "MAP_GET_NEXT_KEY", "PROG_LOAD", 488 }; 489 static DEFINE_STRARRAY(bpf_cmd, "BPF_"); 490 491 static const char *fsmount_flags[] = { 492 [1] = "CLOEXEC", 493 }; 494 static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_"); 495 496 #include "trace/beauty/generated/fsconfig_arrays.c" 497 498 static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_"); 499 500 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", }; 501 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1); 502 503 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", }; 504 static DEFINE_STRARRAY(itimers, "ITIMER_"); 505 506 static const char *keyctl_options[] = { 507 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN", 508 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ", 509 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT", 510 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT", 511 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT", 512 }; 513 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_"); 514 515 static const char *whences[] = { "SET", "CUR", "END", 516 #ifdef SEEK_DATA 517 "DATA", 518 #endif 519 #ifdef SEEK_HOLE 520 "HOLE", 521 #endif 522 }; 523 static DEFINE_STRARRAY(whences, "SEEK_"); 524 525 static const char *fcntl_cmds[] = { 526 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK", 527 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64", 528 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX", 529 "GETOWNER_UIDS", 530 }; 531 static DEFINE_STRARRAY(fcntl_cmds, "F_"); 532 533 static const char *fcntl_linux_specific_cmds[] = { 534 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC", 535 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS", 536 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT", 537 }; 538 539 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE); 540 541 static struct strarray *fcntl_cmds_arrays[] = { 542 &strarray__fcntl_cmds, 543 &strarray__fcntl_linux_specific_cmds, 544 }; 545 546 static DEFINE_STRARRAYS(fcntl_cmds_arrays); 547 548 static const char *rlimit_resources[] = { 549 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE", 550 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO", 551 "RTTIME", 552 }; 553 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_"); 554 555 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", }; 556 static DEFINE_STRARRAY(sighow, "SIG_"); 557 558 static const char *clockid[] = { 559 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID", 560 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME", 561 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI" 562 }; 563 static DEFINE_STRARRAY(clockid, "CLOCK_"); 564 565 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size, 566 struct syscall_arg *arg) 567 { 568 bool show_prefix = arg->show_string_prefix; 569 const char *suffix = "_OK"; 570 size_t printed = 0; 571 int mode = arg->val; 572 573 if (mode == F_OK) /* 0 */ 574 return scnprintf(bf, size, "F%s", show_prefix ? suffix : ""); 575 #define P_MODE(n) \ 576 if (mode & n##_OK) { \ 577 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \ 578 mode &= ~n##_OK; \ 579 } 580 581 P_MODE(R); 582 P_MODE(W); 583 P_MODE(X); 584 #undef P_MODE 585 586 if (mode) 587 printed += scnprintf(bf + printed, size - printed, "|%#x", mode); 588 589 return printed; 590 } 591 592 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode 593 594 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 595 struct syscall_arg *arg); 596 597 #define SCA_FILENAME syscall_arg__scnprintf_filename 598 599 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size, 600 struct syscall_arg *arg) 601 { 602 bool show_prefix = arg->show_string_prefix; 603 const char *prefix = "O_"; 604 int printed = 0, flags = arg->val; 605 606 #define P_FLAG(n) \ 607 if (flags & O_##n) { \ 608 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 609 flags &= ~O_##n; \ 610 } 611 612 P_FLAG(CLOEXEC); 613 P_FLAG(NONBLOCK); 614 #undef P_FLAG 615 616 if (flags) 617 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 618 619 return printed; 620 } 621 622 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags 623 624 #ifndef GRND_NONBLOCK 625 #define GRND_NONBLOCK 0x0001 626 #endif 627 #ifndef GRND_RANDOM 628 #define GRND_RANDOM 0x0002 629 #endif 630 631 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size, 632 struct syscall_arg *arg) 633 { 634 bool show_prefix = arg->show_string_prefix; 635 const char *prefix = "GRND_"; 636 int printed = 0, flags = arg->val; 637 638 #define P_FLAG(n) \ 639 if (flags & GRND_##n) { \ 640 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 641 flags &= ~GRND_##n; \ 642 } 643 644 P_FLAG(RANDOM); 645 P_FLAG(NONBLOCK); 646 #undef P_FLAG 647 648 if (flags) 649 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 650 651 return printed; 652 } 653 654 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags 655 656 #define STRARRAY(name, array) \ 657 { .scnprintf = SCA_STRARRAY, \ 658 .parm = &strarray__##array, } 659 660 #define STRARRAY_FLAGS(name, array) \ 661 { .scnprintf = SCA_STRARRAY_FLAGS, \ 662 .parm = &strarray__##array, } 663 664 #include "trace/beauty/arch_errno_names.c" 665 #include "trace/beauty/eventfd.c" 666 #include "trace/beauty/futex_op.c" 667 #include "trace/beauty/futex_val3.c" 668 #include "trace/beauty/mmap.c" 669 #include "trace/beauty/mode_t.c" 670 #include "trace/beauty/msg_flags.c" 671 #include "trace/beauty/open_flags.c" 672 #include "trace/beauty/perf_event_open.c" 673 #include "trace/beauty/pid.c" 674 #include "trace/beauty/sched_policy.c" 675 #include "trace/beauty/seccomp.c" 676 #include "trace/beauty/signum.c" 677 #include "trace/beauty/socket_type.c" 678 #include "trace/beauty/waitid_options.c" 679 680 struct syscall_arg_fmt { 681 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 682 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val); 683 void *parm; 684 const char *name; 685 bool show_zero; 686 }; 687 688 static struct syscall_fmt { 689 const char *name; 690 const char *alias; 691 struct syscall_arg_fmt arg[6]; 692 u8 nr_args; 693 bool errpid; 694 bool timeout; 695 bool hexret; 696 } syscall_fmts[] = { 697 { .name = "access", 698 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, }, 699 { .name = "arch_prctl", 700 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ }, 701 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, }, 702 { .name = "bind", 703 .arg = { [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ }, }, }, 704 { .name = "bpf", 705 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, }, 706 { .name = "brk", .hexret = true, 707 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, }, 708 { .name = "clock_gettime", 709 .arg = { [0] = STRARRAY(clk_id, clockid), }, }, 710 { .name = "clone", .errpid = true, .nr_args = 5, 711 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, }, 712 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, }, 713 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, }, 714 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, }, 715 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, }, 716 { .name = "close", 717 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, }, 718 { .name = "connect", 719 .arg = { [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ }, }, }, 720 { .name = "epoll_ctl", 721 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, }, 722 { .name = "eventfd2", 723 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, }, 724 { .name = "fchmodat", 725 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 726 { .name = "fchownat", 727 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 728 { .name = "fcntl", 729 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */ 730 .parm = &strarrays__fcntl_cmds_arrays, 731 .show_zero = true, }, 732 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, }, 733 { .name = "flock", 734 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, }, 735 { .name = "fsconfig", 736 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, }, 737 { .name = "fsmount", 738 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags), 739 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, }, 740 { .name = "fspick", 741 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 742 [1] = { .scnprintf = SCA_FILENAME, /* path */ }, 743 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, }, 744 { .name = "fstat", .alias = "newfstat", }, 745 { .name = "fstatat", .alias = "newfstatat", }, 746 { .name = "futex", 747 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ }, 748 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, }, 749 { .name = "futimesat", 750 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 751 { .name = "getitimer", 752 .arg = { [0] = STRARRAY(which, itimers), }, }, 753 { .name = "getpid", .errpid = true, }, 754 { .name = "getpgid", .errpid = true, }, 755 { .name = "getppid", .errpid = true, }, 756 { .name = "getrandom", 757 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, }, 758 { .name = "getrlimit", 759 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 760 { .name = "gettid", .errpid = true, }, 761 { .name = "ioctl", 762 .arg = { 763 #if defined(__i386__) || defined(__x86_64__) 764 /* 765 * FIXME: Make this available to all arches. 766 */ 767 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ }, 768 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 769 #else 770 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 771 #endif 772 { .name = "kcmp", .nr_args = 5, 773 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, }, 774 [1] = { .name = "pid2", .scnprintf = SCA_PID, }, 775 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, }, 776 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, }, 777 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, }, 778 { .name = "keyctl", 779 .arg = { [0] = STRARRAY(option, keyctl_options), }, }, 780 { .name = "kill", 781 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 782 { .name = "linkat", 783 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 784 { .name = "lseek", 785 .arg = { [2] = STRARRAY(whence, whences), }, }, 786 { .name = "lstat", .alias = "newlstat", }, 787 { .name = "madvise", 788 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 789 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, }, 790 { .name = "mkdirat", 791 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 792 { .name = "mknodat", 793 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 794 { .name = "mmap", .hexret = true, 795 /* The standard mmap maps to old_mmap on s390x */ 796 #if defined(__s390x__) 797 .alias = "old_mmap", 798 #endif 799 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 800 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ }, 801 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, }, 802 { .name = "mount", 803 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ }, 804 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ 805 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, }, 806 { .name = "move_mount", 807 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ }, 808 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ }, 809 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ }, 810 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ }, 811 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, }, 812 { .name = "mprotect", 813 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 814 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, }, 815 { .name = "mq_unlink", 816 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, }, 817 { .name = "mremap", .hexret = true, 818 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, }, 819 { .name = "name_to_handle_at", 820 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 821 { .name = "newfstatat", 822 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 823 { .name = "open", 824 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 825 { .name = "open_by_handle_at", 826 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 827 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 828 { .name = "openat", 829 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 830 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 831 { .name = "perf_event_open", 832 .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ }, 833 [3] = { .scnprintf = SCA_FD, /* group_fd */ }, 834 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, }, 835 { .name = "pipe2", 836 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, }, 837 { .name = "pkey_alloc", 838 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, }, 839 { .name = "pkey_free", 840 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, }, 841 { .name = "pkey_mprotect", 842 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 843 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 844 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, }, 845 { .name = "poll", .timeout = true, }, 846 { .name = "ppoll", .timeout = true, }, 847 { .name = "prctl", 848 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ }, 849 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ }, 850 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, }, 851 { .name = "pread", .alias = "pread64", }, 852 { .name = "preadv", .alias = "pread", }, 853 { .name = "prlimit64", 854 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, }, 855 { .name = "pwrite", .alias = "pwrite64", }, 856 { .name = "readlinkat", 857 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 858 { .name = "recvfrom", 859 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 860 { .name = "recvmmsg", 861 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 862 { .name = "recvmsg", 863 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 864 { .name = "renameat", 865 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 866 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, }, 867 { .name = "renameat2", 868 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 869 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, 870 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, }, 871 { .name = "rt_sigaction", 872 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 873 { .name = "rt_sigprocmask", 874 .arg = { [0] = STRARRAY(how, sighow), }, }, 875 { .name = "rt_sigqueueinfo", 876 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 877 { .name = "rt_tgsigqueueinfo", 878 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 879 { .name = "sched_setscheduler", 880 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, }, 881 { .name = "seccomp", 882 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ }, 883 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, }, 884 { .name = "select", .timeout = true, }, 885 { .name = "sendmmsg", 886 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 887 { .name = "sendmsg", 888 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 889 { .name = "sendto", 890 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, 891 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, }, 892 { .name = "set_tid_address", .errpid = true, }, 893 { .name = "setitimer", 894 .arg = { [0] = STRARRAY(which, itimers), }, }, 895 { .name = "setrlimit", 896 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 897 { .name = "socket", 898 .arg = { [0] = STRARRAY(family, socket_families), 899 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 900 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 901 { .name = "socketpair", 902 .arg = { [0] = STRARRAY(family, socket_families), 903 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 904 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 905 { .name = "stat", .alias = "newstat", }, 906 { .name = "statx", 907 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ }, 908 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } , 909 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, }, 910 { .name = "swapoff", 911 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 912 { .name = "swapon", 913 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 914 { .name = "symlinkat", 915 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 916 { .name = "sync_file_range", 917 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, }, 918 { .name = "tgkill", 919 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 920 { .name = "tkill", 921 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 922 { .name = "umount2", .alias = "umount", 923 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, }, 924 { .name = "uname", .alias = "newuname", }, 925 { .name = "unlinkat", 926 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 927 { .name = "utimensat", 928 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, }, 929 { .name = "wait4", .errpid = true, 930 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 931 { .name = "waitid", .errpid = true, 932 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 933 }; 934 935 static int syscall_fmt__cmp(const void *name, const void *fmtp) 936 { 937 const struct syscall_fmt *fmt = fmtp; 938 return strcmp(name, fmt->name); 939 } 940 941 static struct syscall_fmt *syscall_fmt__find(const char *name) 942 { 943 const int nmemb = ARRAY_SIZE(syscall_fmts); 944 return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp); 945 } 946 947 static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias) 948 { 949 int i, nmemb = ARRAY_SIZE(syscall_fmts); 950 951 for (i = 0; i < nmemb; ++i) { 952 if (syscall_fmts[i].alias && strcmp(syscall_fmts[i].alias, alias) == 0) 953 return &syscall_fmts[i]; 954 } 955 956 return NULL; 957 } 958 959 /* 960 * is_exit: is this "exit" or "exit_group"? 961 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter. 962 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc. 963 */ 964 struct syscall { 965 struct tep_event *tp_format; 966 int nr_args; 967 int args_size; 968 bool is_exit; 969 bool is_open; 970 struct tep_format_field *args; 971 const char *name; 972 struct syscall_fmt *fmt; 973 struct syscall_arg_fmt *arg_fmt; 974 }; 975 976 /* 977 * Must match what is in the BPF program: 978 * 979 * tools/perf/examples/bpf/augmented_raw_syscalls.c 980 */ 981 struct bpf_map_syscall_entry { 982 bool enabled; 983 u16 string_args_len[6]; 984 }; 985 986 /* 987 * We need to have this 'calculated' boolean because in some cases we really 988 * don't know what is the duration of a syscall, for instance, when we start 989 * a session and some threads are waiting for a syscall to finish, say 'poll', 990 * in which case all we can do is to print "( ? ) for duration and for the 991 * start timestamp. 992 */ 993 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp) 994 { 995 double duration = (double)t / NSEC_PER_MSEC; 996 size_t printed = fprintf(fp, "("); 997 998 if (!calculated) 999 printed += fprintf(fp, " "); 1000 else if (duration >= 1.0) 1001 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration); 1002 else if (duration >= 0.01) 1003 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration); 1004 else 1005 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration); 1006 return printed + fprintf(fp, "): "); 1007 } 1008 1009 /** 1010 * filename.ptr: The filename char pointer that will be vfs_getname'd 1011 * filename.entry_str_pos: Where to insert the string translated from 1012 * filename.ptr by the vfs_getname tracepoint/kprobe. 1013 * ret_scnprintf: syscall args may set this to a different syscall return 1014 * formatter, for instance, fcntl may return fds, file flags, etc. 1015 */ 1016 struct thread_trace { 1017 u64 entry_time; 1018 bool entry_pending; 1019 unsigned long nr_events; 1020 unsigned long pfmaj, pfmin; 1021 char *entry_str; 1022 double runtime_ms; 1023 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 1024 struct { 1025 unsigned long ptr; 1026 short int entry_str_pos; 1027 bool pending_open; 1028 unsigned int namelen; 1029 char *name; 1030 } filename; 1031 struct { 1032 int max; 1033 struct file *table; 1034 } files; 1035 1036 struct intlist *syscall_stats; 1037 }; 1038 1039 static struct thread_trace *thread_trace__new(void) 1040 { 1041 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace)); 1042 1043 if (ttrace) { 1044 ttrace->files.max = -1; 1045 ttrace->syscall_stats = intlist__new(NULL); 1046 } 1047 1048 return ttrace; 1049 } 1050 1051 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp) 1052 { 1053 struct thread_trace *ttrace; 1054 1055 if (thread == NULL) 1056 goto fail; 1057 1058 if (thread__priv(thread) == NULL) 1059 thread__set_priv(thread, thread_trace__new()); 1060 1061 if (thread__priv(thread) == NULL) 1062 goto fail; 1063 1064 ttrace = thread__priv(thread); 1065 ++ttrace->nr_events; 1066 1067 return ttrace; 1068 fail: 1069 color_fprintf(fp, PERF_COLOR_RED, 1070 "WARNING: not enough memory, dropping samples!\n"); 1071 return NULL; 1072 } 1073 1074 1075 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg, 1076 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg)) 1077 { 1078 struct thread_trace *ttrace = thread__priv(arg->thread); 1079 1080 ttrace->ret_scnprintf = ret_scnprintf; 1081 } 1082 1083 #define TRACE_PFMAJ (1 << 0) 1084 #define TRACE_PFMIN (1 << 1) 1085 1086 static const size_t trace__entry_str_size = 2048; 1087 1088 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd) 1089 { 1090 if (fd < 0) 1091 return NULL; 1092 1093 if (fd > ttrace->files.max) { 1094 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file)); 1095 1096 if (nfiles == NULL) 1097 return NULL; 1098 1099 if (ttrace->files.max != -1) { 1100 memset(nfiles + ttrace->files.max + 1, 0, 1101 (fd - ttrace->files.max) * sizeof(struct file)); 1102 } else { 1103 memset(nfiles, 0, (fd + 1) * sizeof(struct file)); 1104 } 1105 1106 ttrace->files.table = nfiles; 1107 ttrace->files.max = fd; 1108 } 1109 1110 return ttrace->files.table + fd; 1111 } 1112 1113 struct file *thread__files_entry(struct thread *thread, int fd) 1114 { 1115 return thread_trace__files_entry(thread__priv(thread), fd); 1116 } 1117 1118 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname) 1119 { 1120 struct thread_trace *ttrace = thread__priv(thread); 1121 struct file *file = thread_trace__files_entry(ttrace, fd); 1122 1123 if (file != NULL) { 1124 struct stat st; 1125 if (stat(pathname, &st) == 0) 1126 file->dev_maj = major(st.st_rdev); 1127 file->pathname = strdup(pathname); 1128 if (file->pathname) 1129 return 0; 1130 } 1131 1132 return -1; 1133 } 1134 1135 static int thread__read_fd_path(struct thread *thread, int fd) 1136 { 1137 char linkname[PATH_MAX], pathname[PATH_MAX]; 1138 struct stat st; 1139 int ret; 1140 1141 if (thread->pid_ == thread->tid) { 1142 scnprintf(linkname, sizeof(linkname), 1143 "/proc/%d/fd/%d", thread->pid_, fd); 1144 } else { 1145 scnprintf(linkname, sizeof(linkname), 1146 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd); 1147 } 1148 1149 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname)) 1150 return -1; 1151 1152 ret = readlink(linkname, pathname, sizeof(pathname)); 1153 1154 if (ret < 0 || ret > st.st_size) 1155 return -1; 1156 1157 pathname[ret] = '\0'; 1158 return trace__set_fd_pathname(thread, fd, pathname); 1159 } 1160 1161 static const char *thread__fd_path(struct thread *thread, int fd, 1162 struct trace *trace) 1163 { 1164 struct thread_trace *ttrace = thread__priv(thread); 1165 1166 if (ttrace == NULL) 1167 return NULL; 1168 1169 if (fd < 0) 1170 return NULL; 1171 1172 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) { 1173 if (!trace->live) 1174 return NULL; 1175 ++trace->stats.proc_getname; 1176 if (thread__read_fd_path(thread, fd)) 1177 return NULL; 1178 } 1179 1180 return ttrace->files.table[fd].pathname; 1181 } 1182 1183 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg) 1184 { 1185 int fd = arg->val; 1186 size_t printed = scnprintf(bf, size, "%d", fd); 1187 const char *path = thread__fd_path(arg->thread, fd, arg->trace); 1188 1189 if (path) 1190 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1191 1192 return printed; 1193 } 1194 1195 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size) 1196 { 1197 size_t printed = scnprintf(bf, size, "%d", fd); 1198 struct thread *thread = machine__find_thread(trace->host, pid, pid); 1199 1200 if (thread) { 1201 const char *path = thread__fd_path(thread, fd, trace); 1202 1203 if (path) 1204 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1205 1206 thread__put(thread); 1207 } 1208 1209 return printed; 1210 } 1211 1212 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 1213 struct syscall_arg *arg) 1214 { 1215 int fd = arg->val; 1216 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg); 1217 struct thread_trace *ttrace = thread__priv(arg->thread); 1218 1219 if (ttrace && fd >= 0 && fd <= ttrace->files.max) 1220 zfree(&ttrace->files.table[fd].pathname); 1221 1222 return printed; 1223 } 1224 1225 static void thread__set_filename_pos(struct thread *thread, const char *bf, 1226 unsigned long ptr) 1227 { 1228 struct thread_trace *ttrace = thread__priv(thread); 1229 1230 ttrace->filename.ptr = ptr; 1231 ttrace->filename.entry_str_pos = bf - ttrace->entry_str; 1232 } 1233 1234 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size) 1235 { 1236 struct augmented_arg *augmented_arg = arg->augmented.args; 1237 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value); 1238 /* 1239 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls 1240 * we would have two strings, each prefixed by its size. 1241 */ 1242 int consumed = sizeof(*augmented_arg) + augmented_arg->size; 1243 1244 arg->augmented.args = ((void *)arg->augmented.args) + consumed; 1245 arg->augmented.size -= consumed; 1246 1247 return printed; 1248 } 1249 1250 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 1251 struct syscall_arg *arg) 1252 { 1253 unsigned long ptr = arg->val; 1254 1255 if (arg->augmented.args) 1256 return syscall_arg__scnprintf_augmented_string(arg, bf, size); 1257 1258 if (!arg->trace->vfs_getname) 1259 return scnprintf(bf, size, "%#x", ptr); 1260 1261 thread__set_filename_pos(arg->thread, bf, ptr); 1262 return 0; 1263 } 1264 1265 static bool trace__filter_duration(struct trace *trace, double t) 1266 { 1267 return t < (trace->duration_filter * NSEC_PER_MSEC); 1268 } 1269 1270 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1271 { 1272 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC; 1273 1274 return fprintf(fp, "%10.3f ", ts); 1275 } 1276 1277 /* 1278 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are 1279 * using ttrace->entry_time for a thread that receives a sys_exit without 1280 * first having received a sys_enter ("poll" issued before tracing session 1281 * starts, lost sys_enter exit due to ring buffer overflow). 1282 */ 1283 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1284 { 1285 if (tstamp > 0) 1286 return __trace__fprintf_tstamp(trace, tstamp, fp); 1287 1288 return fprintf(fp, " ? "); 1289 } 1290 1291 static bool done = false; 1292 static bool interrupted = false; 1293 1294 static void sig_handler(int sig) 1295 { 1296 done = true; 1297 interrupted = sig == SIGINT; 1298 } 1299 1300 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp) 1301 { 1302 size_t printed = 0; 1303 1304 if (trace->multiple_threads) { 1305 if (trace->show_comm) 1306 printed += fprintf(fp, "%.14s/", thread__comm_str(thread)); 1307 printed += fprintf(fp, "%d ", thread->tid); 1308 } 1309 1310 return printed; 1311 } 1312 1313 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread, 1314 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp) 1315 { 1316 size_t printed = 0; 1317 1318 if (trace->show_tstamp) 1319 printed = trace__fprintf_tstamp(trace, tstamp, fp); 1320 if (trace->show_duration) 1321 printed += fprintf_duration(duration, duration_calculated, fp); 1322 return printed + trace__fprintf_comm_tid(trace, thread, fp); 1323 } 1324 1325 static int trace__process_event(struct trace *trace, struct machine *machine, 1326 union perf_event *event, struct perf_sample *sample) 1327 { 1328 int ret = 0; 1329 1330 switch (event->header.type) { 1331 case PERF_RECORD_LOST: 1332 color_fprintf(trace->output, PERF_COLOR_RED, 1333 "LOST %" PRIu64 " events!\n", event->lost.lost); 1334 ret = machine__process_lost_event(machine, event, sample); 1335 break; 1336 default: 1337 ret = machine__process_event(machine, event, sample); 1338 break; 1339 } 1340 1341 return ret; 1342 } 1343 1344 static int trace__tool_process(struct perf_tool *tool, 1345 union perf_event *event, 1346 struct perf_sample *sample, 1347 struct machine *machine) 1348 { 1349 struct trace *trace = container_of(tool, struct trace, tool); 1350 return trace__process_event(trace, machine, event, sample); 1351 } 1352 1353 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) 1354 { 1355 struct machine *machine = vmachine; 1356 1357 if (machine->kptr_restrict_warned) 1358 return NULL; 1359 1360 if (symbol_conf.kptr_restrict) { 1361 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" 1362 "Check /proc/sys/kernel/kptr_restrict.\n\n" 1363 "Kernel samples will not be resolved.\n"); 1364 machine->kptr_restrict_warned = true; 1365 return NULL; 1366 } 1367 1368 return machine__resolve_kernel_addr(vmachine, addrp, modp); 1369 } 1370 1371 static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist) 1372 { 1373 int err = symbol__init(NULL); 1374 1375 if (err) 1376 return err; 1377 1378 trace->host = machine__new_host(); 1379 if (trace->host == NULL) 1380 return -ENOMEM; 1381 1382 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr); 1383 if (err < 0) 1384 goto out; 1385 1386 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target, 1387 evlist->threads, trace__tool_process, false, 1388 1); 1389 out: 1390 if (err) 1391 symbol__exit(); 1392 1393 return err; 1394 } 1395 1396 static void trace__symbols__exit(struct trace *trace) 1397 { 1398 machine__exit(trace->host); 1399 trace->host = NULL; 1400 1401 symbol__exit(); 1402 } 1403 1404 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) 1405 { 1406 int idx; 1407 1408 if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0) 1409 nr_args = sc->fmt->nr_args; 1410 1411 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt)); 1412 if (sc->arg_fmt == NULL) 1413 return -1; 1414 1415 for (idx = 0; idx < nr_args; ++idx) { 1416 if (sc->fmt) 1417 sc->arg_fmt[idx] = sc->fmt->arg[idx]; 1418 } 1419 1420 sc->nr_args = nr_args; 1421 return 0; 1422 } 1423 1424 static int syscall__set_arg_fmts(struct syscall *sc) 1425 { 1426 struct tep_format_field *field, *last_field = NULL; 1427 int idx = 0, len; 1428 1429 for (field = sc->args; field; field = field->next, ++idx) { 1430 last_field = field; 1431 1432 if (sc->fmt && sc->fmt->arg[idx].scnprintf) 1433 continue; 1434 1435 len = strlen(field->name); 1436 1437 if (strcmp(field->type, "const char *") == 0 && 1438 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) || 1439 strstr(field->name, "path") != NULL)) 1440 sc->arg_fmt[idx].scnprintf = SCA_FILENAME; 1441 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr")) 1442 sc->arg_fmt[idx].scnprintf = SCA_PTR; 1443 else if (strcmp(field->type, "pid_t") == 0) 1444 sc->arg_fmt[idx].scnprintf = SCA_PID; 1445 else if (strcmp(field->type, "umode_t") == 0) 1446 sc->arg_fmt[idx].scnprintf = SCA_MODE_T; 1447 else if ((strcmp(field->type, "int") == 0 || 1448 strcmp(field->type, "unsigned int") == 0 || 1449 strcmp(field->type, "long") == 0) && 1450 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) { 1451 /* 1452 * /sys/kernel/tracing/events/syscalls/sys_enter* 1453 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c 1454 * 65 int 1455 * 23 unsigned int 1456 * 7 unsigned long 1457 */ 1458 sc->arg_fmt[idx].scnprintf = SCA_FD; 1459 } 1460 } 1461 1462 if (last_field) 1463 sc->args_size = last_field->offset + last_field->size; 1464 1465 return 0; 1466 } 1467 1468 static int trace__read_syscall_info(struct trace *trace, int id) 1469 { 1470 char tp_name[128]; 1471 struct syscall *sc; 1472 const char *name = syscalltbl__name(trace->sctbl, id); 1473 1474 if (name == NULL) 1475 return -1; 1476 1477 if (id > trace->syscalls.max) { 1478 struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc)); 1479 1480 if (nsyscalls == NULL) 1481 return -1; 1482 1483 if (trace->syscalls.max != -1) { 1484 memset(nsyscalls + trace->syscalls.max + 1, 0, 1485 (id - trace->syscalls.max) * sizeof(*sc)); 1486 } else { 1487 memset(nsyscalls, 0, (id + 1) * sizeof(*sc)); 1488 } 1489 1490 trace->syscalls.table = nsyscalls; 1491 trace->syscalls.max = id; 1492 } 1493 1494 sc = trace->syscalls.table + id; 1495 sc->name = name; 1496 1497 sc->fmt = syscall_fmt__find(sc->name); 1498 1499 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name); 1500 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1501 1502 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) { 1503 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias); 1504 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1505 } 1506 1507 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields)) 1508 return -1; 1509 1510 if (IS_ERR(sc->tp_format)) 1511 return -1; 1512 1513 sc->args = sc->tp_format->format.fields; 1514 /* 1515 * We need to check and discard the first variable '__syscall_nr' 1516 * or 'nr' that mean the syscall number. It is needless here. 1517 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels. 1518 */ 1519 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) { 1520 sc->args = sc->args->next; 1521 --sc->nr_args; 1522 } 1523 1524 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit"); 1525 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat"); 1526 1527 return syscall__set_arg_fmts(sc); 1528 } 1529 1530 static int trace__validate_ev_qualifier(struct trace *trace) 1531 { 1532 int err = 0; 1533 bool printed_invalid_prefix = false; 1534 struct str_node *pos; 1535 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier); 1536 1537 trace->ev_qualifier_ids.entries = malloc(nr_allocated * 1538 sizeof(trace->ev_qualifier_ids.entries[0])); 1539 1540 if (trace->ev_qualifier_ids.entries == NULL) { 1541 fputs("Error:\tNot enough memory for allocating events qualifier ids\n", 1542 trace->output); 1543 err = -EINVAL; 1544 goto out; 1545 } 1546 1547 strlist__for_each_entry(pos, trace->ev_qualifier) { 1548 const char *sc = pos->s; 1549 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1; 1550 1551 if (id < 0) { 1552 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next); 1553 if (id >= 0) 1554 goto matches; 1555 1556 if (!printed_invalid_prefix) { 1557 pr_debug("Skipping unknown syscalls: "); 1558 printed_invalid_prefix = true; 1559 } else { 1560 pr_debug(", "); 1561 } 1562 1563 pr_debug("%s", sc); 1564 continue; 1565 } 1566 matches: 1567 trace->ev_qualifier_ids.entries[nr_used++] = id; 1568 if (match_next == -1) 1569 continue; 1570 1571 while (1) { 1572 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next); 1573 if (id < 0) 1574 break; 1575 if (nr_allocated == nr_used) { 1576 void *entries; 1577 1578 nr_allocated += 8; 1579 entries = realloc(trace->ev_qualifier_ids.entries, 1580 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0])); 1581 if (entries == NULL) { 1582 err = -ENOMEM; 1583 fputs("\nError:\t Not enough memory for parsing\n", trace->output); 1584 goto out_free; 1585 } 1586 trace->ev_qualifier_ids.entries = entries; 1587 } 1588 trace->ev_qualifier_ids.entries[nr_used++] = id; 1589 } 1590 } 1591 1592 trace->ev_qualifier_ids.nr = nr_used; 1593 out: 1594 if (printed_invalid_prefix) 1595 pr_debug("\n"); 1596 return err; 1597 out_free: 1598 zfree(&trace->ev_qualifier_ids.entries); 1599 trace->ev_qualifier_ids.nr = 0; 1600 goto out; 1601 } 1602 1603 /* 1604 * args is to be interpreted as a series of longs but we need to handle 1605 * 8-byte unaligned accesses. args points to raw_data within the event 1606 * and raw_data is guaranteed to be 8-byte unaligned because it is 1607 * preceded by raw_size which is a u32. So we need to copy args to a temp 1608 * variable to read it. Most notably this avoids extended load instructions 1609 * on unaligned addresses 1610 */ 1611 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx) 1612 { 1613 unsigned long val; 1614 unsigned char *p = arg->args + sizeof(unsigned long) * idx; 1615 1616 memcpy(&val, p, sizeof(val)); 1617 return val; 1618 } 1619 1620 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size, 1621 struct syscall_arg *arg) 1622 { 1623 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name) 1624 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name); 1625 1626 return scnprintf(bf, size, "arg%d: ", arg->idx); 1627 } 1628 1629 /* 1630 * Check if the value is in fact zero, i.e. mask whatever needs masking, such 1631 * as mount 'flags' argument that needs ignoring some magic flag, see comment 1632 * in tools/perf/trace/beauty/mount_flags.c 1633 */ 1634 static unsigned long syscall__mask_val(struct syscall *sc, struct syscall_arg *arg, unsigned long val) 1635 { 1636 if (sc->arg_fmt && sc->arg_fmt[arg->idx].mask_val) 1637 return sc->arg_fmt[arg->idx].mask_val(arg, val); 1638 1639 return val; 1640 } 1641 1642 static size_t syscall__scnprintf_val(struct syscall *sc, char *bf, size_t size, 1643 struct syscall_arg *arg, unsigned long val) 1644 { 1645 if (sc->arg_fmt && sc->arg_fmt[arg->idx].scnprintf) { 1646 arg->val = val; 1647 if (sc->arg_fmt[arg->idx].parm) 1648 arg->parm = sc->arg_fmt[arg->idx].parm; 1649 return sc->arg_fmt[arg->idx].scnprintf(bf, size, arg); 1650 } 1651 return scnprintf(bf, size, "%ld", val); 1652 } 1653 1654 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, 1655 unsigned char *args, void *augmented_args, int augmented_args_size, 1656 struct trace *trace, struct thread *thread) 1657 { 1658 size_t printed = 0; 1659 unsigned long val; 1660 u8 bit = 1; 1661 struct syscall_arg arg = { 1662 .args = args, 1663 .augmented = { 1664 .size = augmented_args_size, 1665 .args = augmented_args, 1666 }, 1667 .idx = 0, 1668 .mask = 0, 1669 .trace = trace, 1670 .thread = thread, 1671 .show_string_prefix = trace->show_string_prefix, 1672 }; 1673 struct thread_trace *ttrace = thread__priv(thread); 1674 1675 /* 1676 * Things like fcntl will set this in its 'cmd' formatter to pick the 1677 * right formatter for the return value (an fd? file flags?), which is 1678 * not needed for syscalls that always return a given type, say an fd. 1679 */ 1680 ttrace->ret_scnprintf = NULL; 1681 1682 if (sc->args != NULL) { 1683 struct tep_format_field *field; 1684 1685 for (field = sc->args; field; 1686 field = field->next, ++arg.idx, bit <<= 1) { 1687 if (arg.mask & bit) 1688 continue; 1689 1690 val = syscall_arg__val(&arg, arg.idx); 1691 /* 1692 * Some syscall args need some mask, most don't and 1693 * return val untouched. 1694 */ 1695 val = syscall__mask_val(sc, &arg, val); 1696 1697 /* 1698 * Suppress this argument if its value is zero and 1699 * and we don't have a string associated in an 1700 * strarray for it. 1701 */ 1702 if (val == 0 && 1703 !trace->show_zeros && 1704 !(sc->arg_fmt && 1705 (sc->arg_fmt[arg.idx].show_zero || 1706 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY || 1707 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) && 1708 sc->arg_fmt[arg.idx].parm)) 1709 continue; 1710 1711 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); 1712 1713 if (trace->show_arg_names) 1714 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); 1715 1716 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val); 1717 } 1718 } else if (IS_ERR(sc->tp_format)) { 1719 /* 1720 * If we managed to read the tracepoint /format file, then we 1721 * may end up not having any args, like with gettid(), so only 1722 * print the raw args when we didn't manage to read it. 1723 */ 1724 while (arg.idx < sc->nr_args) { 1725 if (arg.mask & bit) 1726 goto next_arg; 1727 val = syscall_arg__val(&arg, arg.idx); 1728 if (printed) 1729 printed += scnprintf(bf + printed, size - printed, ", "); 1730 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg); 1731 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val); 1732 next_arg: 1733 ++arg.idx; 1734 bit <<= 1; 1735 } 1736 } 1737 1738 return printed; 1739 } 1740 1741 typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel, 1742 union perf_event *event, 1743 struct perf_sample *sample); 1744 1745 static struct syscall *trace__syscall_info(struct trace *trace, 1746 struct perf_evsel *evsel, int id) 1747 { 1748 1749 if (id < 0) { 1750 1751 /* 1752 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried 1753 * before that, leaving at a higher verbosity level till that is 1754 * explained. Reproduced with plain ftrace with: 1755 * 1756 * echo 1 > /t/events/raw_syscalls/sys_exit/enable 1757 * grep "NR -1 " /t/trace_pipe 1758 * 1759 * After generating some load on the machine. 1760 */ 1761 if (verbose > 1) { 1762 static u64 n; 1763 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n", 1764 id, perf_evsel__name(evsel), ++n); 1765 } 1766 return NULL; 1767 } 1768 1769 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) && 1770 trace__read_syscall_info(trace, id)) 1771 goto out_cant_read; 1772 1773 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL)) 1774 goto out_cant_read; 1775 1776 return &trace->syscalls.table[id]; 1777 1778 out_cant_read: 1779 if (verbose > 0) { 1780 fprintf(trace->output, "Problems reading syscall %d", id); 1781 if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL) 1782 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name); 1783 fputs(" information\n", trace->output); 1784 } 1785 return NULL; 1786 } 1787 1788 static void thread__update_stats(struct thread_trace *ttrace, 1789 int id, struct perf_sample *sample) 1790 { 1791 struct int_node *inode; 1792 struct stats *stats; 1793 u64 duration = 0; 1794 1795 inode = intlist__findnew(ttrace->syscall_stats, id); 1796 if (inode == NULL) 1797 return; 1798 1799 stats = inode->priv; 1800 if (stats == NULL) { 1801 stats = malloc(sizeof(struct stats)); 1802 if (stats == NULL) 1803 return; 1804 init_stats(stats); 1805 inode->priv = stats; 1806 } 1807 1808 if (ttrace->entry_time && sample->time > ttrace->entry_time) 1809 duration = sample->time - ttrace->entry_time; 1810 1811 update_stats(stats, duration); 1812 } 1813 1814 static int trace__printf_interrupted_entry(struct trace *trace) 1815 { 1816 struct thread_trace *ttrace; 1817 size_t printed; 1818 int len; 1819 1820 if (trace->failure_only || trace->current == NULL) 1821 return 0; 1822 1823 ttrace = thread__priv(trace->current); 1824 1825 if (!ttrace->entry_pending) 1826 return 0; 1827 1828 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output); 1829 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str); 1830 1831 if (len < trace->args_alignment - 4) 1832 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " "); 1833 1834 printed += fprintf(trace->output, " ...\n"); 1835 1836 ttrace->entry_pending = false; 1837 ++trace->nr_events_printed; 1838 1839 return printed; 1840 } 1841 1842 static int trace__fprintf_sample(struct trace *trace, struct perf_evsel *evsel, 1843 struct perf_sample *sample, struct thread *thread) 1844 { 1845 int printed = 0; 1846 1847 if (trace->print_sample) { 1848 double ts = (double)sample->time / NSEC_PER_MSEC; 1849 1850 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n", 1851 perf_evsel__name(evsel), ts, 1852 thread__comm_str(thread), 1853 sample->pid, sample->tid, sample->cpu); 1854 } 1855 1856 return printed; 1857 } 1858 1859 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size) 1860 { 1861 void *augmented_args = NULL; 1862 /* 1863 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter 1864 * and there we get all 6 syscall args plus the tracepoint common fields 1865 * that gets calculated at the start and the syscall_nr (another long). 1866 * So we check if that is the case and if so don't look after the 1867 * sc->args_size but always after the full raw_syscalls:sys_enter payload, 1868 * which is fixed. 1869 * 1870 * We'll revisit this later to pass s->args_size to the BPF augmenter 1871 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it 1872 * copies only what we need for each syscall, like what happens when we 1873 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace 1874 * traffic to just what is needed for each syscall. 1875 */ 1876 int args_size = raw_augmented_args_size ?: sc->args_size; 1877 1878 *augmented_args_size = sample->raw_size - args_size; 1879 if (*augmented_args_size > 0) 1880 augmented_args = sample->raw_data + args_size; 1881 1882 return augmented_args; 1883 } 1884 1885 static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel, 1886 union perf_event *event __maybe_unused, 1887 struct perf_sample *sample) 1888 { 1889 char *msg; 1890 void *args; 1891 int printed = 0; 1892 struct thread *thread; 1893 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 1894 int augmented_args_size = 0; 1895 void *augmented_args = NULL; 1896 struct syscall *sc = trace__syscall_info(trace, evsel, id); 1897 struct thread_trace *ttrace; 1898 1899 if (sc == NULL) 1900 return -1; 1901 1902 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 1903 ttrace = thread__trace(thread, trace->output); 1904 if (ttrace == NULL) 1905 goto out_put; 1906 1907 trace__fprintf_sample(trace, evsel, sample, thread); 1908 1909 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 1910 1911 if (ttrace->entry_str == NULL) { 1912 ttrace->entry_str = malloc(trace__entry_str_size); 1913 if (!ttrace->entry_str) 1914 goto out_put; 1915 } 1916 1917 if (!(trace->duration_filter || trace->summary_only || trace->min_stack)) 1918 trace__printf_interrupted_entry(trace); 1919 /* 1920 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible 1921 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments 1922 * this breaks syscall__augmented_args() check for augmented args, as we calculate 1923 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file, 1924 * so when handling, say the openat syscall, we end up getting 6 args for the 1925 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly 1926 * thinking that the extra 2 u64 args are the augmented filename, so just check 1927 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one. 1928 */ 1929 if (evsel != trace->syscalls.events.sys_enter) 1930 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 1931 ttrace->entry_time = sample->time; 1932 msg = ttrace->entry_str; 1933 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name); 1934 1935 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed, 1936 args, augmented_args, augmented_args_size, trace, thread); 1937 1938 if (sc->is_exit) { 1939 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) { 1940 int alignment = 0; 1941 1942 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output); 1943 printed = fprintf(trace->output, "%s)", ttrace->entry_str); 1944 if (trace->args_alignment > printed) 1945 alignment = trace->args_alignment - printed; 1946 fprintf(trace->output, "%*s= ?\n", alignment, " "); 1947 } 1948 } else { 1949 ttrace->entry_pending = true; 1950 /* See trace__vfs_getname & trace__sys_exit */ 1951 ttrace->filename.pending_open = false; 1952 } 1953 1954 if (trace->current != thread) { 1955 thread__put(trace->current); 1956 trace->current = thread__get(thread); 1957 } 1958 err = 0; 1959 out_put: 1960 thread__put(thread); 1961 return err; 1962 } 1963 1964 static int trace__fprintf_sys_enter(struct trace *trace, struct perf_evsel *evsel, 1965 struct perf_sample *sample) 1966 { 1967 struct thread_trace *ttrace; 1968 struct thread *thread; 1969 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 1970 struct syscall *sc = trace__syscall_info(trace, evsel, id); 1971 char msg[1024]; 1972 void *args, *augmented_args = NULL; 1973 int augmented_args_size; 1974 1975 if (sc == NULL) 1976 return -1; 1977 1978 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 1979 ttrace = thread__trace(thread, trace->output); 1980 /* 1981 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args() 1982 * and the rest of the beautifiers accessing it via struct syscall_arg touches it. 1983 */ 1984 if (ttrace == NULL) 1985 goto out_put; 1986 1987 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 1988 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 1989 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread); 1990 fprintf(trace->output, "%s", msg); 1991 err = 0; 1992 out_put: 1993 thread__put(thread); 1994 return err; 1995 } 1996 1997 static int trace__resolve_callchain(struct trace *trace, struct perf_evsel *evsel, 1998 struct perf_sample *sample, 1999 struct callchain_cursor *cursor) 2000 { 2001 struct addr_location al; 2002 int max_stack = evsel->attr.sample_max_stack ? 2003 evsel->attr.sample_max_stack : 2004 trace->max_stack; 2005 int err; 2006 2007 if (machine__resolve(trace->host, &al, sample) < 0) 2008 return -1; 2009 2010 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack); 2011 addr_location__put(&al); 2012 return err; 2013 } 2014 2015 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample) 2016 { 2017 /* TODO: user-configurable print_opts */ 2018 const unsigned int print_opts = EVSEL__PRINT_SYM | 2019 EVSEL__PRINT_DSO | 2020 EVSEL__PRINT_UNKNOWN_AS_ADDR; 2021 2022 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output); 2023 } 2024 2025 static const char *errno_to_name(struct perf_evsel *evsel, int err) 2026 { 2027 struct perf_env *env = perf_evsel__env(evsel); 2028 const char *arch_name = perf_env__arch(env); 2029 2030 return arch_syscalls__strerrno(arch_name, err); 2031 } 2032 2033 static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel, 2034 union perf_event *event __maybe_unused, 2035 struct perf_sample *sample) 2036 { 2037 long ret; 2038 u64 duration = 0; 2039 bool duration_calculated = false; 2040 struct thread *thread; 2041 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0; 2042 int alignment = trace->args_alignment; 2043 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2044 struct thread_trace *ttrace; 2045 2046 if (sc == NULL) 2047 return -1; 2048 2049 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2050 ttrace = thread__trace(thread, trace->output); 2051 if (ttrace == NULL) 2052 goto out_put; 2053 2054 trace__fprintf_sample(trace, evsel, sample, thread); 2055 2056 if (trace->summary) 2057 thread__update_stats(ttrace, id, sample); 2058 2059 ret = perf_evsel__sc_tp_uint(evsel, ret, sample); 2060 2061 if (sc->is_open && ret >= 0 && ttrace->filename.pending_open) { 2062 trace__set_fd_pathname(thread, ret, ttrace->filename.name); 2063 ttrace->filename.pending_open = false; 2064 ++trace->stats.vfs_getname; 2065 } 2066 2067 if (ttrace->entry_time) { 2068 duration = sample->time - ttrace->entry_time; 2069 if (trace__filter_duration(trace, duration)) 2070 goto out; 2071 duration_calculated = true; 2072 } else if (trace->duration_filter) 2073 goto out; 2074 2075 if (sample->callchain) { 2076 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2077 if (callchain_ret == 0) { 2078 if (callchain_cursor.nr < trace->min_stack) 2079 goto out; 2080 callchain_ret = 1; 2081 } 2082 } 2083 2084 if (trace->summary_only || (ret >= 0 && trace->failure_only)) 2085 goto out; 2086 2087 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output); 2088 2089 if (ttrace->entry_pending) { 2090 printed = fprintf(trace->output, "%s", ttrace->entry_str); 2091 } else { 2092 printed += fprintf(trace->output, " ... ["); 2093 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued"); 2094 printed += 9; 2095 printed += fprintf(trace->output, "]: %s()", sc->name); 2096 } 2097 2098 printed++; /* the closing ')' */ 2099 2100 if (alignment > printed) 2101 alignment -= printed; 2102 else 2103 alignment = 0; 2104 2105 fprintf(trace->output, ")%*s= ", alignment, " "); 2106 2107 if (sc->fmt == NULL) { 2108 if (ret < 0) 2109 goto errno_print; 2110 signed_print: 2111 fprintf(trace->output, "%ld", ret); 2112 } else if (ret < 0) { 2113 errno_print: { 2114 char bf[STRERR_BUFSIZE]; 2115 const char *emsg = str_error_r(-ret, bf, sizeof(bf)), 2116 *e = errno_to_name(evsel, -ret); 2117 2118 fprintf(trace->output, "-1 %s (%s)", e, emsg); 2119 } 2120 } else if (ret == 0 && sc->fmt->timeout) 2121 fprintf(trace->output, "0 (Timeout)"); 2122 else if (ttrace->ret_scnprintf) { 2123 char bf[1024]; 2124 struct syscall_arg arg = { 2125 .val = ret, 2126 .thread = thread, 2127 .trace = trace, 2128 }; 2129 ttrace->ret_scnprintf(bf, sizeof(bf), &arg); 2130 ttrace->ret_scnprintf = NULL; 2131 fprintf(trace->output, "%s", bf); 2132 } else if (sc->fmt->hexret) 2133 fprintf(trace->output, "%#lx", ret); 2134 else if (sc->fmt->errpid) { 2135 struct thread *child = machine__find_thread(trace->host, ret, ret); 2136 2137 if (child != NULL) { 2138 fprintf(trace->output, "%ld", ret); 2139 if (child->comm_set) 2140 fprintf(trace->output, " (%s)", thread__comm_str(child)); 2141 thread__put(child); 2142 } 2143 } else 2144 goto signed_print; 2145 2146 fputc('\n', trace->output); 2147 2148 /* 2149 * We only consider an 'event' for the sake of --max-events a non-filtered 2150 * sys_enter + sys_exit and other tracepoint events. 2151 */ 2152 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX) 2153 interrupted = true; 2154 2155 if (callchain_ret > 0) 2156 trace__fprintf_callchain(trace, sample); 2157 else if (callchain_ret < 0) 2158 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); 2159 out: 2160 ttrace->entry_pending = false; 2161 err = 0; 2162 out_put: 2163 thread__put(thread); 2164 return err; 2165 } 2166 2167 static int trace__vfs_getname(struct trace *trace, struct perf_evsel *evsel, 2168 union perf_event *event __maybe_unused, 2169 struct perf_sample *sample) 2170 { 2171 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2172 struct thread_trace *ttrace; 2173 size_t filename_len, entry_str_len, to_move; 2174 ssize_t remaining_space; 2175 char *pos; 2176 const char *filename = perf_evsel__rawptr(evsel, sample, "pathname"); 2177 2178 if (!thread) 2179 goto out; 2180 2181 ttrace = thread__priv(thread); 2182 if (!ttrace) 2183 goto out_put; 2184 2185 filename_len = strlen(filename); 2186 if (filename_len == 0) 2187 goto out_put; 2188 2189 if (ttrace->filename.namelen < filename_len) { 2190 char *f = realloc(ttrace->filename.name, filename_len + 1); 2191 2192 if (f == NULL) 2193 goto out_put; 2194 2195 ttrace->filename.namelen = filename_len; 2196 ttrace->filename.name = f; 2197 } 2198 2199 strcpy(ttrace->filename.name, filename); 2200 ttrace->filename.pending_open = true; 2201 2202 if (!ttrace->filename.ptr) 2203 goto out_put; 2204 2205 entry_str_len = strlen(ttrace->entry_str); 2206 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */ 2207 if (remaining_space <= 0) 2208 goto out_put; 2209 2210 if (filename_len > (size_t)remaining_space) { 2211 filename += filename_len - remaining_space; 2212 filename_len = remaining_space; 2213 } 2214 2215 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */ 2216 pos = ttrace->entry_str + ttrace->filename.entry_str_pos; 2217 memmove(pos + filename_len, pos, to_move); 2218 memcpy(pos, filename, filename_len); 2219 2220 ttrace->filename.ptr = 0; 2221 ttrace->filename.entry_str_pos = 0; 2222 out_put: 2223 thread__put(thread); 2224 out: 2225 return 0; 2226 } 2227 2228 static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel, 2229 union perf_event *event __maybe_unused, 2230 struct perf_sample *sample) 2231 { 2232 u64 runtime = perf_evsel__intval(evsel, sample, "runtime"); 2233 double runtime_ms = (double)runtime / NSEC_PER_MSEC; 2234 struct thread *thread = machine__findnew_thread(trace->host, 2235 sample->pid, 2236 sample->tid); 2237 struct thread_trace *ttrace = thread__trace(thread, trace->output); 2238 2239 if (ttrace == NULL) 2240 goto out_dump; 2241 2242 ttrace->runtime_ms += runtime_ms; 2243 trace->runtime_ms += runtime_ms; 2244 out_put: 2245 thread__put(thread); 2246 return 0; 2247 2248 out_dump: 2249 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n", 2250 evsel->name, 2251 perf_evsel__strval(evsel, sample, "comm"), 2252 (pid_t)perf_evsel__intval(evsel, sample, "pid"), 2253 runtime, 2254 perf_evsel__intval(evsel, sample, "vruntime")); 2255 goto out_put; 2256 } 2257 2258 static int bpf_output__printer(enum binary_printer_ops op, 2259 unsigned int val, void *extra __maybe_unused, FILE *fp) 2260 { 2261 unsigned char ch = (unsigned char)val; 2262 2263 switch (op) { 2264 case BINARY_PRINT_CHAR_DATA: 2265 return fprintf(fp, "%c", isprint(ch) ? ch : '.'); 2266 case BINARY_PRINT_DATA_BEGIN: 2267 case BINARY_PRINT_LINE_BEGIN: 2268 case BINARY_PRINT_ADDR: 2269 case BINARY_PRINT_NUM_DATA: 2270 case BINARY_PRINT_NUM_PAD: 2271 case BINARY_PRINT_SEP: 2272 case BINARY_PRINT_CHAR_PAD: 2273 case BINARY_PRINT_LINE_END: 2274 case BINARY_PRINT_DATA_END: 2275 default: 2276 break; 2277 } 2278 2279 return 0; 2280 } 2281 2282 static void bpf_output__fprintf(struct trace *trace, 2283 struct perf_sample *sample) 2284 { 2285 binary__fprintf(sample->raw_data, sample->raw_size, 8, 2286 bpf_output__printer, NULL, trace->output); 2287 ++trace->nr_events_printed; 2288 } 2289 2290 static int trace__event_handler(struct trace *trace, struct perf_evsel *evsel, 2291 union perf_event *event __maybe_unused, 2292 struct perf_sample *sample) 2293 { 2294 struct thread *thread; 2295 int callchain_ret = 0; 2296 /* 2297 * Check if we called perf_evsel__disable(evsel) due to, for instance, 2298 * this event's max_events having been hit and this is an entry coming 2299 * from the ring buffer that we should discard, since the max events 2300 * have already been considered/printed. 2301 */ 2302 if (evsel->disabled) 2303 return 0; 2304 2305 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2306 2307 if (sample->callchain) { 2308 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2309 if (callchain_ret == 0) { 2310 if (callchain_cursor.nr < trace->min_stack) 2311 goto out; 2312 callchain_ret = 1; 2313 } 2314 } 2315 2316 trace__printf_interrupted_entry(trace); 2317 trace__fprintf_tstamp(trace, sample->time, trace->output); 2318 2319 if (trace->trace_syscalls && trace->show_duration) 2320 fprintf(trace->output, "( ): "); 2321 2322 if (thread) 2323 trace__fprintf_comm_tid(trace, thread, trace->output); 2324 2325 if (evsel == trace->syscalls.events.augmented) { 2326 int id = perf_evsel__sc_tp_uint(evsel, id, sample); 2327 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2328 2329 if (sc) { 2330 fprintf(trace->output, "%s(", sc->name); 2331 trace__fprintf_sys_enter(trace, evsel, sample); 2332 fputc(')', trace->output); 2333 goto newline; 2334 } 2335 2336 /* 2337 * XXX: Not having the associated syscall info or not finding/adding 2338 * the thread should never happen, but if it does... 2339 * fall thru and print it as a bpf_output event. 2340 */ 2341 } 2342 2343 fprintf(trace->output, "%s:", evsel->name); 2344 2345 if (perf_evsel__is_bpf_output(evsel)) { 2346 bpf_output__fprintf(trace, sample); 2347 } else if (evsel->tp_format) { 2348 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) || 2349 trace__fprintf_sys_enter(trace, evsel, sample)) { 2350 event_format__fprintf(evsel->tp_format, sample->cpu, 2351 sample->raw_data, sample->raw_size, 2352 trace->output); 2353 ++trace->nr_events_printed; 2354 2355 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) { 2356 perf_evsel__disable(evsel); 2357 perf_evsel__close(evsel); 2358 } 2359 } 2360 } 2361 2362 newline: 2363 fprintf(trace->output, "\n"); 2364 2365 if (callchain_ret > 0) 2366 trace__fprintf_callchain(trace, sample); 2367 else if (callchain_ret < 0) 2368 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); 2369 out: 2370 thread__put(thread); 2371 return 0; 2372 } 2373 2374 static void print_location(FILE *f, struct perf_sample *sample, 2375 struct addr_location *al, 2376 bool print_dso, bool print_sym) 2377 { 2378 2379 if ((verbose > 0 || print_dso) && al->map) 2380 fprintf(f, "%s@", al->map->dso->long_name); 2381 2382 if ((verbose > 0 || print_sym) && al->sym) 2383 fprintf(f, "%s+0x%" PRIx64, al->sym->name, 2384 al->addr - al->sym->start); 2385 else if (al->map) 2386 fprintf(f, "0x%" PRIx64, al->addr); 2387 else 2388 fprintf(f, "0x%" PRIx64, sample->addr); 2389 } 2390 2391 static int trace__pgfault(struct trace *trace, 2392 struct perf_evsel *evsel, 2393 union perf_event *event __maybe_unused, 2394 struct perf_sample *sample) 2395 { 2396 struct thread *thread; 2397 struct addr_location al; 2398 char map_type = 'd'; 2399 struct thread_trace *ttrace; 2400 int err = -1; 2401 int callchain_ret = 0; 2402 2403 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2404 2405 if (sample->callchain) { 2406 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2407 if (callchain_ret == 0) { 2408 if (callchain_cursor.nr < trace->min_stack) 2409 goto out_put; 2410 callchain_ret = 1; 2411 } 2412 } 2413 2414 ttrace = thread__trace(thread, trace->output); 2415 if (ttrace == NULL) 2416 goto out_put; 2417 2418 if (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ) 2419 ttrace->pfmaj++; 2420 else 2421 ttrace->pfmin++; 2422 2423 if (trace->summary_only) 2424 goto out; 2425 2426 thread__find_symbol(thread, sample->cpumode, sample->ip, &al); 2427 2428 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output); 2429 2430 fprintf(trace->output, "%sfault [", 2431 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ? 2432 "maj" : "min"); 2433 2434 print_location(trace->output, sample, &al, false, true); 2435 2436 fprintf(trace->output, "] => "); 2437 2438 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2439 2440 if (!al.map) { 2441 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2442 2443 if (al.map) 2444 map_type = 'x'; 2445 else 2446 map_type = '?'; 2447 } 2448 2449 print_location(trace->output, sample, &al, true, false); 2450 2451 fprintf(trace->output, " (%c%c)\n", map_type, al.level); 2452 2453 if (callchain_ret > 0) 2454 trace__fprintf_callchain(trace, sample); 2455 else if (callchain_ret < 0) 2456 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); 2457 2458 ++trace->nr_events_printed; 2459 out: 2460 err = 0; 2461 out_put: 2462 thread__put(thread); 2463 return err; 2464 } 2465 2466 static void trace__set_base_time(struct trace *trace, 2467 struct perf_evsel *evsel, 2468 struct perf_sample *sample) 2469 { 2470 /* 2471 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust 2472 * and don't use sample->time unconditionally, we may end up having 2473 * some other event in the future without PERF_SAMPLE_TIME for good 2474 * reason, i.e. we may not be interested in its timestamps, just in 2475 * it taking place, picking some piece of information when it 2476 * appears in our event stream (vfs_getname comes to mind). 2477 */ 2478 if (trace->base_time == 0 && !trace->full_time && 2479 (evsel->attr.sample_type & PERF_SAMPLE_TIME)) 2480 trace->base_time = sample->time; 2481 } 2482 2483 static int trace__process_sample(struct perf_tool *tool, 2484 union perf_event *event, 2485 struct perf_sample *sample, 2486 struct perf_evsel *evsel, 2487 struct machine *machine __maybe_unused) 2488 { 2489 struct trace *trace = container_of(tool, struct trace, tool); 2490 struct thread *thread; 2491 int err = 0; 2492 2493 tracepoint_handler handler = evsel->handler; 2494 2495 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2496 if (thread && thread__is_filtered(thread)) 2497 goto out; 2498 2499 trace__set_base_time(trace, evsel, sample); 2500 2501 if (handler) { 2502 ++trace->nr_events; 2503 handler(trace, evsel, event, sample); 2504 } 2505 out: 2506 thread__put(thread); 2507 return err; 2508 } 2509 2510 static int trace__record(struct trace *trace, int argc, const char **argv) 2511 { 2512 unsigned int rec_argc, i, j; 2513 const char **rec_argv; 2514 const char * const record_args[] = { 2515 "record", 2516 "-R", 2517 "-m", "1024", 2518 "-c", "1", 2519 }; 2520 2521 const char * const sc_args[] = { "-e", }; 2522 unsigned int sc_args_nr = ARRAY_SIZE(sc_args); 2523 const char * const majpf_args[] = { "-e", "major-faults" }; 2524 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args); 2525 const char * const minpf_args[] = { "-e", "minor-faults" }; 2526 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args); 2527 2528 /* +1 is for the event string below */ 2529 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 + 2530 majpf_args_nr + minpf_args_nr + argc; 2531 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 2532 2533 if (rec_argv == NULL) 2534 return -ENOMEM; 2535 2536 j = 0; 2537 for (i = 0; i < ARRAY_SIZE(record_args); i++) 2538 rec_argv[j++] = record_args[i]; 2539 2540 if (trace->trace_syscalls) { 2541 for (i = 0; i < sc_args_nr; i++) 2542 rec_argv[j++] = sc_args[i]; 2543 2544 /* event string may be different for older kernels - e.g., RHEL6 */ 2545 if (is_valid_tracepoint("raw_syscalls:sys_enter")) 2546 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit"; 2547 else if (is_valid_tracepoint("syscalls:sys_enter")) 2548 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit"; 2549 else { 2550 pr_err("Neither raw_syscalls nor syscalls events exist.\n"); 2551 free(rec_argv); 2552 return -1; 2553 } 2554 } 2555 2556 if (trace->trace_pgfaults & TRACE_PFMAJ) 2557 for (i = 0; i < majpf_args_nr; i++) 2558 rec_argv[j++] = majpf_args[i]; 2559 2560 if (trace->trace_pgfaults & TRACE_PFMIN) 2561 for (i = 0; i < minpf_args_nr; i++) 2562 rec_argv[j++] = minpf_args[i]; 2563 2564 for (i = 0; i < (unsigned int)argc; i++) 2565 rec_argv[j++] = argv[i]; 2566 2567 return cmd_record(j, rec_argv); 2568 } 2569 2570 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp); 2571 2572 static bool perf_evlist__add_vfs_getname(struct perf_evlist *evlist) 2573 { 2574 bool found = false; 2575 struct perf_evsel *evsel, *tmp; 2576 struct parse_events_error err = { .idx = 0, }; 2577 int ret = parse_events(evlist, "probe:vfs_getname*", &err); 2578 2579 if (ret) 2580 return false; 2581 2582 evlist__for_each_entry_safe(evlist, evsel, tmp) { 2583 if (!strstarts(perf_evsel__name(evsel), "probe:vfs_getname")) 2584 continue; 2585 2586 if (perf_evsel__field(evsel, "pathname")) { 2587 evsel->handler = trace__vfs_getname; 2588 found = true; 2589 continue; 2590 } 2591 2592 list_del_init(&evsel->node); 2593 evsel->evlist = NULL; 2594 perf_evsel__delete(evsel); 2595 } 2596 2597 return found; 2598 } 2599 2600 static struct perf_evsel *perf_evsel__new_pgfault(u64 config) 2601 { 2602 struct perf_evsel *evsel; 2603 struct perf_event_attr attr = { 2604 .type = PERF_TYPE_SOFTWARE, 2605 .mmap_data = 1, 2606 }; 2607 2608 attr.config = config; 2609 attr.sample_period = 1; 2610 2611 event_attr_init(&attr); 2612 2613 evsel = perf_evsel__new(&attr); 2614 if (evsel) 2615 evsel->handler = trace__pgfault; 2616 2617 return evsel; 2618 } 2619 2620 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample) 2621 { 2622 const u32 type = event->header.type; 2623 struct perf_evsel *evsel; 2624 2625 if (type != PERF_RECORD_SAMPLE) { 2626 trace__process_event(trace, trace->host, event, sample); 2627 return; 2628 } 2629 2630 evsel = perf_evlist__id2evsel(trace->evlist, sample->id); 2631 if (evsel == NULL) { 2632 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id); 2633 return; 2634 } 2635 2636 trace__set_base_time(trace, evsel, sample); 2637 2638 if (evsel->attr.type == PERF_TYPE_TRACEPOINT && 2639 sample->raw_data == NULL) { 2640 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n", 2641 perf_evsel__name(evsel), sample->tid, 2642 sample->cpu, sample->raw_size); 2643 } else { 2644 tracepoint_handler handler = evsel->handler; 2645 handler(trace, evsel, event, sample); 2646 } 2647 2648 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX) 2649 interrupted = true; 2650 } 2651 2652 static int trace__add_syscall_newtp(struct trace *trace) 2653 { 2654 int ret = -1; 2655 struct perf_evlist *evlist = trace->evlist; 2656 struct perf_evsel *sys_enter, *sys_exit; 2657 2658 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter); 2659 if (sys_enter == NULL) 2660 goto out; 2661 2662 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args)) 2663 goto out_delete_sys_enter; 2664 2665 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit); 2666 if (sys_exit == NULL) 2667 goto out_delete_sys_enter; 2668 2669 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret)) 2670 goto out_delete_sys_exit; 2671 2672 perf_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param); 2673 perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param); 2674 2675 perf_evlist__add(evlist, sys_enter); 2676 perf_evlist__add(evlist, sys_exit); 2677 2678 if (callchain_param.enabled && !trace->kernel_syscallchains) { 2679 /* 2680 * We're interested only in the user space callchain 2681 * leading to the syscall, allow overriding that for 2682 * debugging reasons using --kernel_syscall_callchains 2683 */ 2684 sys_exit->attr.exclude_callchain_kernel = 1; 2685 } 2686 2687 trace->syscalls.events.sys_enter = sys_enter; 2688 trace->syscalls.events.sys_exit = sys_exit; 2689 2690 ret = 0; 2691 out: 2692 return ret; 2693 2694 out_delete_sys_exit: 2695 perf_evsel__delete_priv(sys_exit); 2696 out_delete_sys_enter: 2697 perf_evsel__delete_priv(sys_enter); 2698 goto out; 2699 } 2700 2701 static int trace__set_ev_qualifier_tp_filter(struct trace *trace) 2702 { 2703 int err = -1; 2704 struct perf_evsel *sys_exit; 2705 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier, 2706 trace->ev_qualifier_ids.nr, 2707 trace->ev_qualifier_ids.entries); 2708 2709 if (filter == NULL) 2710 goto out_enomem; 2711 2712 if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter, 2713 filter)) { 2714 sys_exit = trace->syscalls.events.sys_exit; 2715 err = perf_evsel__append_tp_filter(sys_exit, filter); 2716 } 2717 2718 free(filter); 2719 out: 2720 return err; 2721 out_enomem: 2722 errno = ENOMEM; 2723 goto out; 2724 } 2725 2726 #ifdef HAVE_LIBBPF_SUPPORT 2727 static void trace__init_bpf_map_syscall_args(struct trace *trace, int id, struct bpf_map_syscall_entry *entry) 2728 { 2729 struct syscall *sc = trace__syscall_info(trace, NULL, id); 2730 int arg = 0; 2731 2732 if (sc == NULL) 2733 goto out; 2734 2735 for (; arg < sc->nr_args; ++arg) { 2736 entry->string_args_len[arg] = 0; 2737 if (sc->arg_fmt[arg].scnprintf == SCA_FILENAME) { 2738 /* Should be set like strace -s strsize */ 2739 entry->string_args_len[arg] = PATH_MAX; 2740 } 2741 } 2742 out: 2743 for (; arg < 6; ++arg) 2744 entry->string_args_len[arg] = 0; 2745 } 2746 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace) 2747 { 2748 int fd = bpf_map__fd(trace->syscalls.map); 2749 struct bpf_map_syscall_entry value = { 2750 .enabled = !trace->not_ev_qualifier, 2751 }; 2752 int err = 0; 2753 size_t i; 2754 2755 for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) { 2756 int key = trace->ev_qualifier_ids.entries[i]; 2757 2758 if (value.enabled) 2759 trace__init_bpf_map_syscall_args(trace, key, &value); 2760 2761 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST); 2762 if (err) 2763 break; 2764 } 2765 2766 return err; 2767 } 2768 2769 static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled) 2770 { 2771 int fd = bpf_map__fd(trace->syscalls.map); 2772 struct bpf_map_syscall_entry value = { 2773 .enabled = enabled, 2774 }; 2775 int err = 0, key; 2776 2777 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 2778 if (enabled) 2779 trace__init_bpf_map_syscall_args(trace, key, &value); 2780 2781 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY); 2782 if (err) 2783 break; 2784 } 2785 2786 return err; 2787 } 2788 2789 static int trace__init_syscalls_bpf_map(struct trace *trace) 2790 { 2791 bool enabled = true; 2792 2793 if (trace->ev_qualifier_ids.nr) 2794 enabled = trace->not_ev_qualifier; 2795 2796 return __trace__init_syscalls_bpf_map(trace, enabled); 2797 } 2798 #else 2799 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused) 2800 { 2801 return 0; 2802 } 2803 2804 static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused) 2805 { 2806 return 0; 2807 } 2808 #endif // HAVE_LIBBPF_SUPPORT 2809 2810 static int trace__set_ev_qualifier_filter(struct trace *trace) 2811 { 2812 if (trace->syscalls.map) 2813 return trace__set_ev_qualifier_bpf_filter(trace); 2814 if (trace->syscalls.events.sys_enter) 2815 return trace__set_ev_qualifier_tp_filter(trace); 2816 return 0; 2817 } 2818 2819 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused, 2820 size_t npids __maybe_unused, pid_t *pids __maybe_unused) 2821 { 2822 int err = 0; 2823 #ifdef HAVE_LIBBPF_SUPPORT 2824 bool value = true; 2825 int map_fd = bpf_map__fd(map); 2826 size_t i; 2827 2828 for (i = 0; i < npids; ++i) { 2829 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY); 2830 if (err) 2831 break; 2832 } 2833 #endif 2834 return err; 2835 } 2836 2837 static int trace__set_filter_loop_pids(struct trace *trace) 2838 { 2839 unsigned int nr = 1, err; 2840 pid_t pids[32] = { 2841 getpid(), 2842 }; 2843 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]); 2844 2845 while (thread && nr < ARRAY_SIZE(pids)) { 2846 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid); 2847 2848 if (parent == NULL) 2849 break; 2850 2851 if (!strcmp(thread__comm_str(parent), "sshd") || 2852 strstarts(thread__comm_str(parent), "gnome-terminal")) { 2853 pids[nr++] = parent->tid; 2854 break; 2855 } 2856 thread = parent; 2857 } 2858 2859 err = perf_evlist__set_tp_filter_pids(trace->evlist, nr, pids); 2860 if (!err && trace->filter_pids.map) 2861 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids); 2862 2863 return err; 2864 } 2865 2866 static int trace__set_filter_pids(struct trace *trace) 2867 { 2868 int err = 0; 2869 /* 2870 * Better not use !target__has_task() here because we need to cover the 2871 * case where no threads were specified in the command line, but a 2872 * workload was, and in that case we will fill in the thread_map when 2873 * we fork the workload in perf_evlist__prepare_workload. 2874 */ 2875 if (trace->filter_pids.nr > 0) { 2876 err = perf_evlist__set_tp_filter_pids(trace->evlist, trace->filter_pids.nr, 2877 trace->filter_pids.entries); 2878 if (!err && trace->filter_pids.map) { 2879 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr, 2880 trace->filter_pids.entries); 2881 } 2882 } else if (thread_map__pid(trace->evlist->threads, 0) == -1) { 2883 err = trace__set_filter_loop_pids(trace); 2884 } 2885 2886 return err; 2887 } 2888 2889 static int __trace__deliver_event(struct trace *trace, union perf_event *event) 2890 { 2891 struct perf_evlist *evlist = trace->evlist; 2892 struct perf_sample sample; 2893 int err; 2894 2895 err = perf_evlist__parse_sample(evlist, event, &sample); 2896 if (err) 2897 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err); 2898 else 2899 trace__handle_event(trace, event, &sample); 2900 2901 return 0; 2902 } 2903 2904 static int __trace__flush_events(struct trace *trace) 2905 { 2906 u64 first = ordered_events__first_time(&trace->oe.data); 2907 u64 flush = trace->oe.last - NSEC_PER_SEC; 2908 2909 /* Is there some thing to flush.. */ 2910 if (first && first < flush) 2911 return ordered_events__flush_time(&trace->oe.data, flush); 2912 2913 return 0; 2914 } 2915 2916 static int trace__flush_events(struct trace *trace) 2917 { 2918 return !trace->sort_events ? 0 : __trace__flush_events(trace); 2919 } 2920 2921 static int trace__deliver_event(struct trace *trace, union perf_event *event) 2922 { 2923 int err; 2924 2925 if (!trace->sort_events) 2926 return __trace__deliver_event(trace, event); 2927 2928 err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last); 2929 if (err && err != -1) 2930 return err; 2931 2932 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0); 2933 if (err) 2934 return err; 2935 2936 return trace__flush_events(trace); 2937 } 2938 2939 static int ordered_events__deliver_event(struct ordered_events *oe, 2940 struct ordered_event *event) 2941 { 2942 struct trace *trace = container_of(oe, struct trace, oe.data); 2943 2944 return __trace__deliver_event(trace, event->event); 2945 } 2946 2947 static int trace__run(struct trace *trace, int argc, const char **argv) 2948 { 2949 struct perf_evlist *evlist = trace->evlist; 2950 struct perf_evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL; 2951 int err = -1, i; 2952 unsigned long before; 2953 const bool forks = argc > 0; 2954 bool draining = false; 2955 2956 trace->live = true; 2957 2958 if (!trace->raw_augmented_syscalls) { 2959 if (trace->trace_syscalls && trace__add_syscall_newtp(trace)) 2960 goto out_error_raw_syscalls; 2961 2962 if (trace->trace_syscalls) 2963 trace->vfs_getname = perf_evlist__add_vfs_getname(evlist); 2964 } 2965 2966 if ((trace->trace_pgfaults & TRACE_PFMAJ)) { 2967 pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ); 2968 if (pgfault_maj == NULL) 2969 goto out_error_mem; 2970 perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param); 2971 perf_evlist__add(evlist, pgfault_maj); 2972 } 2973 2974 if ((trace->trace_pgfaults & TRACE_PFMIN)) { 2975 pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN); 2976 if (pgfault_min == NULL) 2977 goto out_error_mem; 2978 perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param); 2979 perf_evlist__add(evlist, pgfault_min); 2980 } 2981 2982 if (trace->sched && 2983 perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime", 2984 trace__sched_stat_runtime)) 2985 goto out_error_sched_stat_runtime; 2986 2987 /* 2988 * If a global cgroup was set, apply it to all the events without an 2989 * explicit cgroup. I.e.: 2990 * 2991 * trace -G A -e sched:*switch 2992 * 2993 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc 2994 * _and_ sched:sched_switch to the 'A' cgroup, while: 2995 * 2996 * trace -e sched:*switch -G A 2997 * 2998 * will only set the sched:sched_switch event to the 'A' cgroup, all the 2999 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without" 3000 * a cgroup (on the root cgroup, sys wide, etc). 3001 * 3002 * Multiple cgroups: 3003 * 3004 * trace -G A -e sched:*switch -G B 3005 * 3006 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes 3007 * to the 'B' cgroup. 3008 * 3009 * evlist__set_default_cgroup() grabs a reference of the passed cgroup 3010 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL. 3011 */ 3012 if (trace->cgroup) 3013 evlist__set_default_cgroup(trace->evlist, trace->cgroup); 3014 3015 err = perf_evlist__create_maps(evlist, &trace->opts.target); 3016 if (err < 0) { 3017 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n"); 3018 goto out_delete_evlist; 3019 } 3020 3021 err = trace__symbols_init(trace, evlist); 3022 if (err < 0) { 3023 fprintf(trace->output, "Problems initializing symbol libraries!\n"); 3024 goto out_delete_evlist; 3025 } 3026 3027 perf_evlist__config(evlist, &trace->opts, &callchain_param); 3028 3029 signal(SIGCHLD, sig_handler); 3030 signal(SIGINT, sig_handler); 3031 3032 if (forks) { 3033 err = perf_evlist__prepare_workload(evlist, &trace->opts.target, 3034 argv, false, NULL); 3035 if (err < 0) { 3036 fprintf(trace->output, "Couldn't run the workload!\n"); 3037 goto out_delete_evlist; 3038 } 3039 } 3040 3041 err = perf_evlist__open(evlist); 3042 if (err < 0) 3043 goto out_error_open; 3044 3045 err = bpf__apply_obj_config(); 3046 if (err) { 3047 char errbuf[BUFSIZ]; 3048 3049 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); 3050 pr_err("ERROR: Apply config to BPF failed: %s\n", 3051 errbuf); 3052 goto out_error_open; 3053 } 3054 3055 err = trace__set_filter_pids(trace); 3056 if (err < 0) 3057 goto out_error_mem; 3058 3059 if (trace->syscalls.map) 3060 trace__init_syscalls_bpf_map(trace); 3061 3062 if (trace->ev_qualifier_ids.nr > 0) { 3063 err = trace__set_ev_qualifier_filter(trace); 3064 if (err < 0) 3065 goto out_errno; 3066 3067 if (trace->syscalls.events.sys_exit) { 3068 pr_debug("event qualifier tracepoint filter: %s\n", 3069 trace->syscalls.events.sys_exit->filter); 3070 } 3071 } 3072 3073 err = perf_evlist__apply_filters(evlist, &evsel); 3074 if (err < 0) 3075 goto out_error_apply_filters; 3076 3077 if (trace->dump.map) 3078 bpf_map__fprintf(trace->dump.map, trace->output); 3079 3080 err = perf_evlist__mmap(evlist, trace->opts.mmap_pages); 3081 if (err < 0) 3082 goto out_error_mmap; 3083 3084 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay) 3085 perf_evlist__enable(evlist); 3086 3087 if (forks) 3088 perf_evlist__start_workload(evlist); 3089 3090 if (trace->opts.initial_delay) { 3091 usleep(trace->opts.initial_delay * 1000); 3092 perf_evlist__enable(evlist); 3093 } 3094 3095 trace->multiple_threads = thread_map__pid(evlist->threads, 0) == -1 || 3096 evlist->threads->nr > 1 || 3097 perf_evlist__first(evlist)->attr.inherit; 3098 3099 /* 3100 * Now that we already used evsel->attr to ask the kernel to setup the 3101 * events, lets reuse evsel->attr.sample_max_stack as the limit in 3102 * trace__resolve_callchain(), allowing per-event max-stack settings 3103 * to override an explicitly set --max-stack global setting. 3104 */ 3105 evlist__for_each_entry(evlist, evsel) { 3106 if (evsel__has_callchain(evsel) && 3107 evsel->attr.sample_max_stack == 0) 3108 evsel->attr.sample_max_stack = trace->max_stack; 3109 } 3110 again: 3111 before = trace->nr_events; 3112 3113 for (i = 0; i < evlist->nr_mmaps; i++) { 3114 union perf_event *event; 3115 struct perf_mmap *md; 3116 3117 md = &evlist->mmap[i]; 3118 if (perf_mmap__read_init(md) < 0) 3119 continue; 3120 3121 while ((event = perf_mmap__read_event(md)) != NULL) { 3122 ++trace->nr_events; 3123 3124 err = trace__deliver_event(trace, event); 3125 if (err) 3126 goto out_disable; 3127 3128 perf_mmap__consume(md); 3129 3130 if (interrupted) 3131 goto out_disable; 3132 3133 if (done && !draining) { 3134 perf_evlist__disable(evlist); 3135 draining = true; 3136 } 3137 } 3138 perf_mmap__read_done(md); 3139 } 3140 3141 if (trace->nr_events == before) { 3142 int timeout = done ? 100 : -1; 3143 3144 if (!draining && perf_evlist__poll(evlist, timeout) > 0) { 3145 if (perf_evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0) 3146 draining = true; 3147 3148 goto again; 3149 } else { 3150 if (trace__flush_events(trace)) 3151 goto out_disable; 3152 } 3153 } else { 3154 goto again; 3155 } 3156 3157 out_disable: 3158 thread__zput(trace->current); 3159 3160 perf_evlist__disable(evlist); 3161 3162 if (trace->sort_events) 3163 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL); 3164 3165 if (!err) { 3166 if (trace->summary) 3167 trace__fprintf_thread_summary(trace, trace->output); 3168 3169 if (trace->show_tool_stats) { 3170 fprintf(trace->output, "Stats:\n " 3171 " vfs_getname : %" PRIu64 "\n" 3172 " proc_getname: %" PRIu64 "\n", 3173 trace->stats.vfs_getname, 3174 trace->stats.proc_getname); 3175 } 3176 } 3177 3178 out_delete_evlist: 3179 trace__symbols__exit(trace); 3180 3181 perf_evlist__delete(evlist); 3182 cgroup__put(trace->cgroup); 3183 trace->evlist = NULL; 3184 trace->live = false; 3185 return err; 3186 { 3187 char errbuf[BUFSIZ]; 3188 3189 out_error_sched_stat_runtime: 3190 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime"); 3191 goto out_error; 3192 3193 out_error_raw_syscalls: 3194 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)"); 3195 goto out_error; 3196 3197 out_error_mmap: 3198 perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf)); 3199 goto out_error; 3200 3201 out_error_open: 3202 perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf)); 3203 3204 out_error: 3205 fprintf(trace->output, "%s\n", errbuf); 3206 goto out_delete_evlist; 3207 3208 out_error_apply_filters: 3209 fprintf(trace->output, 3210 "Failed to set filter \"%s\" on event %s with %d (%s)\n", 3211 evsel->filter, perf_evsel__name(evsel), errno, 3212 str_error_r(errno, errbuf, sizeof(errbuf))); 3213 goto out_delete_evlist; 3214 } 3215 out_error_mem: 3216 fprintf(trace->output, "Not enough memory to run!\n"); 3217 goto out_delete_evlist; 3218 3219 out_errno: 3220 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno)); 3221 goto out_delete_evlist; 3222 } 3223 3224 static int trace__replay(struct trace *trace) 3225 { 3226 const struct perf_evsel_str_handler handlers[] = { 3227 { "probe:vfs_getname", trace__vfs_getname, }, 3228 }; 3229 struct perf_data data = { 3230 .path = input_name, 3231 .mode = PERF_DATA_MODE_READ, 3232 .force = trace->force, 3233 }; 3234 struct perf_session *session; 3235 struct perf_evsel *evsel; 3236 int err = -1; 3237 3238 trace->tool.sample = trace__process_sample; 3239 trace->tool.mmap = perf_event__process_mmap; 3240 trace->tool.mmap2 = perf_event__process_mmap2; 3241 trace->tool.comm = perf_event__process_comm; 3242 trace->tool.exit = perf_event__process_exit; 3243 trace->tool.fork = perf_event__process_fork; 3244 trace->tool.attr = perf_event__process_attr; 3245 trace->tool.tracing_data = perf_event__process_tracing_data; 3246 trace->tool.build_id = perf_event__process_build_id; 3247 trace->tool.namespaces = perf_event__process_namespaces; 3248 3249 trace->tool.ordered_events = true; 3250 trace->tool.ordering_requires_timestamps = true; 3251 3252 /* add tid to output */ 3253 trace->multiple_threads = true; 3254 3255 session = perf_session__new(&data, false, &trace->tool); 3256 if (session == NULL) 3257 return -1; 3258 3259 if (trace->opts.target.pid) 3260 symbol_conf.pid_list_str = strdup(trace->opts.target.pid); 3261 3262 if (trace->opts.target.tid) 3263 symbol_conf.tid_list_str = strdup(trace->opts.target.tid); 3264 3265 if (symbol__init(&session->header.env) < 0) 3266 goto out; 3267 3268 trace->host = &session->machines.host; 3269 3270 err = perf_session__set_tracepoints_handlers(session, handlers); 3271 if (err) 3272 goto out; 3273 3274 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3275 "raw_syscalls:sys_enter"); 3276 /* older kernels have syscalls tp versus raw_syscalls */ 3277 if (evsel == NULL) 3278 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3279 "syscalls:sys_enter"); 3280 3281 if (evsel && 3282 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 || 3283 perf_evsel__init_sc_tp_ptr_field(evsel, args))) { 3284 pr_err("Error during initialize raw_syscalls:sys_enter event\n"); 3285 goto out; 3286 } 3287 3288 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3289 "raw_syscalls:sys_exit"); 3290 if (evsel == NULL) 3291 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3292 "syscalls:sys_exit"); 3293 if (evsel && 3294 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 || 3295 perf_evsel__init_sc_tp_uint_field(evsel, ret))) { 3296 pr_err("Error during initialize raw_syscalls:sys_exit event\n"); 3297 goto out; 3298 } 3299 3300 evlist__for_each_entry(session->evlist, evsel) { 3301 if (evsel->attr.type == PERF_TYPE_SOFTWARE && 3302 (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ || 3303 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN || 3304 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS)) 3305 evsel->handler = trace__pgfault; 3306 } 3307 3308 setup_pager(); 3309 3310 err = perf_session__process_events(session); 3311 if (err) 3312 pr_err("Failed to process events, error %d", err); 3313 3314 else if (trace->summary) 3315 trace__fprintf_thread_summary(trace, trace->output); 3316 3317 out: 3318 perf_session__delete(session); 3319 3320 return err; 3321 } 3322 3323 static size_t trace__fprintf_threads_header(FILE *fp) 3324 { 3325 size_t printed; 3326 3327 printed = fprintf(fp, "\n Summary of events:\n\n"); 3328 3329 return printed; 3330 } 3331 3332 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs, 3333 struct stats *stats; 3334 double msecs; 3335 int syscall; 3336 ) 3337 { 3338 struct int_node *source = rb_entry(nd, struct int_node, rb_node); 3339 struct stats *stats = source->priv; 3340 3341 entry->syscall = source->i; 3342 entry->stats = stats; 3343 entry->msecs = stats ? (u64)stats->n * (avg_stats(stats) / NSEC_PER_MSEC) : 0; 3344 } 3345 3346 static size_t thread__dump_stats(struct thread_trace *ttrace, 3347 struct trace *trace, FILE *fp) 3348 { 3349 size_t printed = 0; 3350 struct syscall *sc; 3351 struct rb_node *nd; 3352 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats); 3353 3354 if (syscall_stats == NULL) 3355 return 0; 3356 3357 printed += fprintf(fp, "\n"); 3358 3359 printed += fprintf(fp, " syscall calls total min avg max stddev\n"); 3360 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n"); 3361 printed += fprintf(fp, " --------------- -------- --------- --------- --------- --------- ------\n"); 3362 3363 resort_rb__for_each_entry(nd, syscall_stats) { 3364 struct stats *stats = syscall_stats_entry->stats; 3365 if (stats) { 3366 double min = (double)(stats->min) / NSEC_PER_MSEC; 3367 double max = (double)(stats->max) / NSEC_PER_MSEC; 3368 double avg = avg_stats(stats); 3369 double pct; 3370 u64 n = (u64) stats->n; 3371 3372 pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0; 3373 avg /= NSEC_PER_MSEC; 3374 3375 sc = &trace->syscalls.table[syscall_stats_entry->syscall]; 3376 printed += fprintf(fp, " %-15s", sc->name); 3377 printed += fprintf(fp, " %8" PRIu64 " %9.3f %9.3f %9.3f", 3378 n, syscall_stats_entry->msecs, min, avg); 3379 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct); 3380 } 3381 } 3382 3383 resort_rb__delete(syscall_stats); 3384 printed += fprintf(fp, "\n\n"); 3385 3386 return printed; 3387 } 3388 3389 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace) 3390 { 3391 size_t printed = 0; 3392 struct thread_trace *ttrace = thread__priv(thread); 3393 double ratio; 3394 3395 if (ttrace == NULL) 3396 return 0; 3397 3398 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0; 3399 3400 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid); 3401 printed += fprintf(fp, "%lu events, ", ttrace->nr_events); 3402 printed += fprintf(fp, "%.1f%%", ratio); 3403 if (ttrace->pfmaj) 3404 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj); 3405 if (ttrace->pfmin) 3406 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin); 3407 if (trace->sched) 3408 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms); 3409 else if (fputc('\n', fp) != EOF) 3410 ++printed; 3411 3412 printed += thread__dump_stats(ttrace, trace, fp); 3413 3414 return printed; 3415 } 3416 3417 static unsigned long thread__nr_events(struct thread_trace *ttrace) 3418 { 3419 return ttrace ? ttrace->nr_events : 0; 3420 } 3421 3422 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)), 3423 struct thread *thread; 3424 ) 3425 { 3426 entry->thread = rb_entry(nd, struct thread, rb_node); 3427 } 3428 3429 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp) 3430 { 3431 size_t printed = trace__fprintf_threads_header(fp); 3432 struct rb_node *nd; 3433 int i; 3434 3435 for (i = 0; i < THREADS__TABLE_SIZE; i++) { 3436 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i); 3437 3438 if (threads == NULL) { 3439 fprintf(fp, "%s", "Error sorting output by nr_events!\n"); 3440 return 0; 3441 } 3442 3443 resort_rb__for_each_entry(nd, threads) 3444 printed += trace__fprintf_thread(fp, threads_entry->thread, trace); 3445 3446 resort_rb__delete(threads); 3447 } 3448 return printed; 3449 } 3450 3451 static int trace__set_duration(const struct option *opt, const char *str, 3452 int unset __maybe_unused) 3453 { 3454 struct trace *trace = opt->value; 3455 3456 trace->duration_filter = atof(str); 3457 return 0; 3458 } 3459 3460 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str, 3461 int unset __maybe_unused) 3462 { 3463 int ret = -1; 3464 size_t i; 3465 struct trace *trace = opt->value; 3466 /* 3467 * FIXME: introduce a intarray class, plain parse csv and create a 3468 * { int nr, int entries[] } struct... 3469 */ 3470 struct intlist *list = intlist__new(str); 3471 3472 if (list == NULL) 3473 return -1; 3474 3475 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1; 3476 trace->filter_pids.entries = calloc(i, sizeof(pid_t)); 3477 3478 if (trace->filter_pids.entries == NULL) 3479 goto out; 3480 3481 trace->filter_pids.entries[0] = getpid(); 3482 3483 for (i = 1; i < trace->filter_pids.nr; ++i) 3484 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i; 3485 3486 intlist__delete(list); 3487 ret = 0; 3488 out: 3489 return ret; 3490 } 3491 3492 static int trace__open_output(struct trace *trace, const char *filename) 3493 { 3494 struct stat st; 3495 3496 if (!stat(filename, &st) && st.st_size) { 3497 char oldname[PATH_MAX]; 3498 3499 scnprintf(oldname, sizeof(oldname), "%s.old", filename); 3500 unlink(oldname); 3501 rename(filename, oldname); 3502 } 3503 3504 trace->output = fopen(filename, "w"); 3505 3506 return trace->output == NULL ? -errno : 0; 3507 } 3508 3509 static int parse_pagefaults(const struct option *opt, const char *str, 3510 int unset __maybe_unused) 3511 { 3512 int *trace_pgfaults = opt->value; 3513 3514 if (strcmp(str, "all") == 0) 3515 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN; 3516 else if (strcmp(str, "maj") == 0) 3517 *trace_pgfaults |= TRACE_PFMAJ; 3518 else if (strcmp(str, "min") == 0) 3519 *trace_pgfaults |= TRACE_PFMIN; 3520 else 3521 return -1; 3522 3523 return 0; 3524 } 3525 3526 static void evlist__set_evsel_handler(struct perf_evlist *evlist, void *handler) 3527 { 3528 struct perf_evsel *evsel; 3529 3530 evlist__for_each_entry(evlist, evsel) 3531 evsel->handler = handler; 3532 } 3533 3534 static int evlist__set_syscall_tp_fields(struct perf_evlist *evlist) 3535 { 3536 struct perf_evsel *evsel; 3537 3538 evlist__for_each_entry(evlist, evsel) { 3539 if (evsel->priv || !evsel->tp_format) 3540 continue; 3541 3542 if (strcmp(evsel->tp_format->system, "syscalls")) 3543 continue; 3544 3545 if (perf_evsel__init_syscall_tp(evsel)) 3546 return -1; 3547 3548 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) { 3549 struct syscall_tp *sc = evsel->priv; 3550 3551 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64))) 3552 return -1; 3553 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) { 3554 struct syscall_tp *sc = evsel->priv; 3555 3556 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap)) 3557 return -1; 3558 } 3559 } 3560 3561 return 0; 3562 } 3563 3564 /* 3565 * XXX: Hackish, just splitting the combined -e+--event (syscalls 3566 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use 3567 * existing facilities unchanged (trace->ev_qualifier + parse_options()). 3568 * 3569 * It'd be better to introduce a parse_options() variant that would return a 3570 * list with the terms it didn't match to an event... 3571 */ 3572 static int trace__parse_events_option(const struct option *opt, const char *str, 3573 int unset __maybe_unused) 3574 { 3575 struct trace *trace = (struct trace *)opt->value; 3576 const char *s = str; 3577 char *sep = NULL, *lists[2] = { NULL, NULL, }; 3578 int len = strlen(str) + 1, err = -1, list, idx; 3579 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR); 3580 char group_name[PATH_MAX]; 3581 struct syscall_fmt *fmt; 3582 3583 if (strace_groups_dir == NULL) 3584 return -1; 3585 3586 if (*s == '!') { 3587 ++s; 3588 trace->not_ev_qualifier = true; 3589 } 3590 3591 while (1) { 3592 if ((sep = strchr(s, ',')) != NULL) 3593 *sep = '\0'; 3594 3595 list = 0; 3596 if (syscalltbl__id(trace->sctbl, s) >= 0 || 3597 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) { 3598 list = 1; 3599 goto do_concat; 3600 } 3601 3602 fmt = syscall_fmt__find_by_alias(s); 3603 if (fmt != NULL) { 3604 list = 1; 3605 s = fmt->name; 3606 } else { 3607 path__join(group_name, sizeof(group_name), strace_groups_dir, s); 3608 if (access(group_name, R_OK) == 0) 3609 list = 1; 3610 } 3611 do_concat: 3612 if (lists[list]) { 3613 sprintf(lists[list] + strlen(lists[list]), ",%s", s); 3614 } else { 3615 lists[list] = malloc(len); 3616 if (lists[list] == NULL) 3617 goto out; 3618 strcpy(lists[list], s); 3619 } 3620 3621 if (!sep) 3622 break; 3623 3624 *sep = ','; 3625 s = sep + 1; 3626 } 3627 3628 if (lists[1] != NULL) { 3629 struct strlist_config slist_config = { 3630 .dirname = strace_groups_dir, 3631 }; 3632 3633 trace->ev_qualifier = strlist__new(lists[1], &slist_config); 3634 if (trace->ev_qualifier == NULL) { 3635 fputs("Not enough memory to parse event qualifier", trace->output); 3636 goto out; 3637 } 3638 3639 if (trace__validate_ev_qualifier(trace)) 3640 goto out; 3641 trace->trace_syscalls = true; 3642 } 3643 3644 err = 0; 3645 3646 if (lists[0]) { 3647 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event", 3648 "event selector. use 'perf list' to list available events", 3649 parse_events_option); 3650 err = parse_events_option(&o, lists[0], 0); 3651 } 3652 out: 3653 if (sep) 3654 *sep = ','; 3655 3656 return err; 3657 } 3658 3659 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset) 3660 { 3661 struct trace *trace = opt->value; 3662 3663 if (!list_empty(&trace->evlist->entries)) 3664 return parse_cgroups(opt, str, unset); 3665 3666 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str); 3667 3668 return 0; 3669 } 3670 3671 static struct bpf_map *bpf__find_map_by_name(const char *name) 3672 { 3673 struct bpf_object *obj, *tmp; 3674 3675 bpf_object__for_each_safe(obj, tmp) { 3676 struct bpf_map *map = bpf_object__find_map_by_name(obj, name); 3677 if (map) 3678 return map; 3679 3680 } 3681 3682 return NULL; 3683 } 3684 3685 static void trace__set_bpf_map_filtered_pids(struct trace *trace) 3686 { 3687 trace->filter_pids.map = bpf__find_map_by_name("pids_filtered"); 3688 } 3689 3690 static void trace__set_bpf_map_syscalls(struct trace *trace) 3691 { 3692 trace->syscalls.map = bpf__find_map_by_name("syscalls"); 3693 } 3694 3695 static int trace__config(const char *var, const char *value, void *arg) 3696 { 3697 struct trace *trace = arg; 3698 int err = 0; 3699 3700 if (!strcmp(var, "trace.add_events")) { 3701 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event", 3702 "event selector. use 'perf list' to list available events", 3703 parse_events_option); 3704 /* 3705 * We can't propagate parse_event_option() return, as it is 1 3706 * for failure while perf_config() expects -1. 3707 */ 3708 if (parse_events_option(&o, value, 0)) 3709 err = -1; 3710 } else if (!strcmp(var, "trace.show_timestamp")) { 3711 trace->show_tstamp = perf_config_bool(var, value); 3712 } else if (!strcmp(var, "trace.show_duration")) { 3713 trace->show_duration = perf_config_bool(var, value); 3714 } else if (!strcmp(var, "trace.show_arg_names")) { 3715 trace->show_arg_names = perf_config_bool(var, value); 3716 if (!trace->show_arg_names) 3717 trace->show_zeros = true; 3718 } else if (!strcmp(var, "trace.show_zeros")) { 3719 bool new_show_zeros = perf_config_bool(var, value); 3720 if (!trace->show_arg_names && !new_show_zeros) { 3721 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n"); 3722 goto out; 3723 } 3724 trace->show_zeros = new_show_zeros; 3725 } else if (!strcmp(var, "trace.show_prefix")) { 3726 trace->show_string_prefix = perf_config_bool(var, value); 3727 } else if (!strcmp(var, "trace.no_inherit")) { 3728 trace->opts.no_inherit = perf_config_bool(var, value); 3729 } else if (!strcmp(var, "trace.args_alignment")) { 3730 int args_alignment = 0; 3731 if (perf_config_int(&args_alignment, var, value) == 0) 3732 trace->args_alignment = args_alignment; 3733 } 3734 out: 3735 return err; 3736 } 3737 3738 int cmd_trace(int argc, const char **argv) 3739 { 3740 const char *trace_usage[] = { 3741 "perf trace [<options>] [<command>]", 3742 "perf trace [<options>] -- <command> [<options>]", 3743 "perf trace record [<options>] [<command>]", 3744 "perf trace record [<options>] -- <command> [<options>]", 3745 NULL 3746 }; 3747 struct trace trace = { 3748 .syscalls = { 3749 . max = -1, 3750 }, 3751 .opts = { 3752 .target = { 3753 .uid = UINT_MAX, 3754 .uses_mmap = true, 3755 }, 3756 .user_freq = UINT_MAX, 3757 .user_interval = ULLONG_MAX, 3758 .no_buffering = true, 3759 .mmap_pages = UINT_MAX, 3760 }, 3761 .output = stderr, 3762 .show_comm = true, 3763 .show_tstamp = true, 3764 .show_duration = true, 3765 .show_arg_names = true, 3766 .args_alignment = 70, 3767 .trace_syscalls = false, 3768 .kernel_syscallchains = false, 3769 .max_stack = UINT_MAX, 3770 .max_events = ULONG_MAX, 3771 }; 3772 const char *map_dump_str = NULL; 3773 const char *output_name = NULL; 3774 const struct option trace_options[] = { 3775 OPT_CALLBACK('e', "event", &trace, "event", 3776 "event/syscall selector. use 'perf list' to list available events", 3777 trace__parse_events_option), 3778 OPT_BOOLEAN(0, "comm", &trace.show_comm, 3779 "show the thread COMM next to its id"), 3780 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"), 3781 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace", 3782 trace__parse_events_option), 3783 OPT_STRING('o', "output", &output_name, "file", "output file name"), 3784 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"), 3785 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid", 3786 "trace events on existing process id"), 3787 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid", 3788 "trace events on existing thread id"), 3789 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids", 3790 "pids to filter (by the kernel)", trace__set_filter_pids_from_option), 3791 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide, 3792 "system-wide collection from all CPUs"), 3793 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu", 3794 "list of cpus to monitor"), 3795 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit, 3796 "child tasks do not inherit counters"), 3797 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages", 3798 "number of mmap data pages", 3799 perf_evlist__parse_mmap_pages), 3800 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user", 3801 "user to profile"), 3802 OPT_CALLBACK(0, "duration", &trace, "float", 3803 "show only events with duration > N.M ms", 3804 trace__set_duration), 3805 #ifdef HAVE_LIBBPF_SUPPORT 3806 OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"), 3807 #endif 3808 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"), 3809 OPT_INCR('v', "verbose", &verbose, "be more verbose"), 3810 OPT_BOOLEAN('T', "time", &trace.full_time, 3811 "Show full timestamp, not time relative to first start"), 3812 OPT_BOOLEAN(0, "failure", &trace.failure_only, 3813 "Show only syscalls that failed"), 3814 OPT_BOOLEAN('s', "summary", &trace.summary_only, 3815 "Show only syscall summary with statistics"), 3816 OPT_BOOLEAN('S', "with-summary", &trace.summary, 3817 "Show all syscalls and summary with statistics"), 3818 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min", 3819 "Trace pagefaults", parse_pagefaults, "maj"), 3820 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"), 3821 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"), 3822 OPT_CALLBACK(0, "call-graph", &trace.opts, 3823 "record_mode[,record_size]", record_callchain_help, 3824 &record_parse_callchain_opt), 3825 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains, 3826 "Show the kernel callchains on the syscall exit path"), 3827 OPT_ULONG(0, "max-events", &trace.max_events, 3828 "Set the maximum number of events to print, exit after that is reached. "), 3829 OPT_UINTEGER(0, "min-stack", &trace.min_stack, 3830 "Set the minimum stack depth when parsing the callchain, " 3831 "anything below the specified depth will be ignored."), 3832 OPT_UINTEGER(0, "max-stack", &trace.max_stack, 3833 "Set the maximum stack depth when parsing the callchain, " 3834 "anything beyond the specified depth will be ignored. " 3835 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)), 3836 OPT_BOOLEAN(0, "sort-events", &trace.sort_events, 3837 "Sort batch of events before processing, use if getting out of order events"), 3838 OPT_BOOLEAN(0, "print-sample", &trace.print_sample, 3839 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"), 3840 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, 3841 "per thread proc mmap processing timeout in ms"), 3842 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only", 3843 trace__parse_cgroups), 3844 OPT_UINTEGER('D', "delay", &trace.opts.initial_delay, 3845 "ms to wait before starting measurement after program " 3846 "start"), 3847 OPT_END() 3848 }; 3849 bool __maybe_unused max_stack_user_set = true; 3850 bool mmap_pages_user_set = true; 3851 struct perf_evsel *evsel; 3852 const char * const trace_subcommands[] = { "record", NULL }; 3853 int err = -1; 3854 char bf[BUFSIZ]; 3855 3856 signal(SIGSEGV, sighandler_dump_stack); 3857 signal(SIGFPE, sighandler_dump_stack); 3858 3859 trace.evlist = perf_evlist__new(); 3860 trace.sctbl = syscalltbl__new(); 3861 3862 if (trace.evlist == NULL || trace.sctbl == NULL) { 3863 pr_err("Not enough memory to run!\n"); 3864 err = -ENOMEM; 3865 goto out; 3866 } 3867 3868 /* 3869 * Parsing .perfconfig may entail creating a BPF event, that may need 3870 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting 3871 * is too small. This affects just this process, not touching the 3872 * global setting. If it fails we'll get something in 'perf trace -v' 3873 * to help diagnose the problem. 3874 */ 3875 rlimit__bump_memlock(); 3876 3877 err = perf_config(trace__config, &trace); 3878 if (err) 3879 goto out; 3880 3881 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands, 3882 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION); 3883 3884 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) { 3885 usage_with_options_msg(trace_usage, trace_options, 3886 "cgroup monitoring only available in system-wide mode"); 3887 } 3888 3889 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__"); 3890 if (IS_ERR(evsel)) { 3891 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf)); 3892 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf); 3893 goto out; 3894 } 3895 3896 if (evsel) { 3897 trace.syscalls.events.augmented = evsel; 3898 trace__set_bpf_map_filtered_pids(&trace); 3899 trace__set_bpf_map_syscalls(&trace); 3900 } 3901 3902 err = bpf__setup_stdout(trace.evlist); 3903 if (err) { 3904 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf)); 3905 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf); 3906 goto out; 3907 } 3908 3909 err = -1; 3910 3911 if (map_dump_str) { 3912 trace.dump.map = bpf__find_map_by_name(map_dump_str); 3913 if (trace.dump.map == NULL) { 3914 pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str); 3915 goto out; 3916 } 3917 } 3918 3919 if (trace.trace_pgfaults) { 3920 trace.opts.sample_address = true; 3921 trace.opts.sample_time = true; 3922 } 3923 3924 if (trace.opts.mmap_pages == UINT_MAX) 3925 mmap_pages_user_set = false; 3926 3927 if (trace.max_stack == UINT_MAX) { 3928 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack(); 3929 max_stack_user_set = false; 3930 } 3931 3932 #ifdef HAVE_DWARF_UNWIND_SUPPORT 3933 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) { 3934 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false); 3935 } 3936 #endif 3937 3938 if (callchain_param.enabled) { 3939 if (!mmap_pages_user_set && geteuid() == 0) 3940 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4; 3941 3942 symbol_conf.use_callchain = true; 3943 } 3944 3945 if (trace.evlist->nr_entries > 0) { 3946 evlist__set_evsel_handler(trace.evlist, trace__event_handler); 3947 if (evlist__set_syscall_tp_fields(trace.evlist)) { 3948 perror("failed to set syscalls:* tracepoint fields"); 3949 goto out; 3950 } 3951 } 3952 3953 if (trace.sort_events) { 3954 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace); 3955 ordered_events__set_copy_on_queue(&trace.oe.data, true); 3956 } 3957 3958 /* 3959 * If we are augmenting syscalls, then combine what we put in the 3960 * __augmented_syscalls__ BPF map with what is in the 3961 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF, 3962 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit. 3963 * 3964 * We'll switch to look at two BPF maps, one for sys_enter and the 3965 * other for sys_exit when we start augmenting the sys_exit paths with 3966 * buffers that are being copied from kernel to userspace, think 'read' 3967 * syscall. 3968 */ 3969 if (trace.syscalls.events.augmented) { 3970 evlist__for_each_entry(trace.evlist, evsel) { 3971 bool raw_syscalls_sys_exit = strcmp(perf_evsel__name(evsel), "raw_syscalls:sys_exit") == 0; 3972 3973 if (raw_syscalls_sys_exit) { 3974 trace.raw_augmented_syscalls = true; 3975 goto init_augmented_syscall_tp; 3976 } 3977 3978 if (trace.syscalls.events.augmented->priv == NULL && 3979 strstr(perf_evsel__name(evsel), "syscalls:sys_enter")) { 3980 struct perf_evsel *augmented = trace.syscalls.events.augmented; 3981 if (perf_evsel__init_augmented_syscall_tp(augmented, evsel) || 3982 perf_evsel__init_augmented_syscall_tp_args(augmented)) 3983 goto out; 3984 augmented->handler = trace__sys_enter; 3985 } 3986 3987 if (strstarts(perf_evsel__name(evsel), "syscalls:sys_exit_")) { 3988 struct syscall_tp *sc; 3989 init_augmented_syscall_tp: 3990 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel)) 3991 goto out; 3992 sc = evsel->priv; 3993 /* 3994 * For now with BPF raw_augmented we hook into 3995 * raw_syscalls:sys_enter and there we get all 3996 * 6 syscall args plus the tracepoint common 3997 * fields and the syscall_nr (another long). 3998 * So we check if that is the case and if so 3999 * don't look after the sc->args_size but 4000 * always after the full raw_syscalls:sys_enter 4001 * payload, which is fixed. 4002 * 4003 * We'll revisit this later to pass 4004 * s->args_size to the BPF augmenter (now 4005 * tools/perf/examples/bpf/augmented_raw_syscalls.c, 4006 * so that it copies only what we need for each 4007 * syscall, like what happens when we use 4008 * syscalls:sys_enter_NAME, so that we reduce 4009 * the kernel/userspace traffic to just what is 4010 * needed for each syscall. 4011 */ 4012 if (trace.raw_augmented_syscalls) 4013 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset; 4014 perf_evsel__init_augmented_syscall_tp_ret(evsel); 4015 evsel->handler = trace__sys_exit; 4016 } 4017 } 4018 } 4019 4020 if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) 4021 return trace__record(&trace, argc-1, &argv[1]); 4022 4023 /* summary_only implies summary option, but don't overwrite summary if set */ 4024 if (trace.summary_only) 4025 trace.summary = trace.summary_only; 4026 4027 if (!trace.trace_syscalls && !trace.trace_pgfaults && 4028 trace.evlist->nr_entries == 0 /* Was --events used? */) { 4029 trace.trace_syscalls = true; 4030 } 4031 4032 if (output_name != NULL) { 4033 err = trace__open_output(&trace, output_name); 4034 if (err < 0) { 4035 perror("failed to create output file"); 4036 goto out; 4037 } 4038 } 4039 4040 err = target__validate(&trace.opts.target); 4041 if (err) { 4042 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 4043 fprintf(trace.output, "%s", bf); 4044 goto out_close; 4045 } 4046 4047 err = target__parse_uid(&trace.opts.target); 4048 if (err) { 4049 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 4050 fprintf(trace.output, "%s", bf); 4051 goto out_close; 4052 } 4053 4054 if (!argc && target__none(&trace.opts.target)) 4055 trace.opts.target.system_wide = true; 4056 4057 if (input_name) 4058 err = trace__replay(&trace); 4059 else 4060 err = trace__run(&trace, argc, argv); 4061 4062 out_close: 4063 if (output_name != NULL) 4064 fclose(trace.output); 4065 out: 4066 return err; 4067 } 4068