1 /* 2 * builtin-trace.c 3 * 4 * Builtin 'trace' command: 5 * 6 * Display a continuously updated trace of any workload, CPU, specific PID, 7 * system wide, etc. Default format is loosely strace like, but any other 8 * event may be specified using --event. 9 * 10 * Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> 11 * 12 * Initially based on the 'trace' prototype by Thomas Gleixner: 13 * 14 * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'") 15 * 16 * Released under the GPL v2. (and only v2, not any later version) 17 */ 18 19 #include <traceevent/event-parse.h> 20 #include <api/fs/tracing_path.h> 21 #include <bpf/bpf.h> 22 #include "builtin.h" 23 #include "util/cgroup.h" 24 #include "util/color.h" 25 #include "util/config.h" 26 #include "util/debug.h" 27 #include "util/env.h" 28 #include "util/event.h" 29 #include "util/evlist.h" 30 #include <subcmd/exec-cmd.h> 31 #include "util/machine.h" 32 #include "util/path.h" 33 #include "util/session.h" 34 #include "util/thread.h" 35 #include <subcmd/parse-options.h> 36 #include "util/strlist.h" 37 #include "util/intlist.h" 38 #include "util/thread_map.h" 39 #include "util/stat.h" 40 #include "trace/beauty/beauty.h" 41 #include "trace-event.h" 42 #include "util/parse-events.h" 43 #include "util/bpf-loader.h" 44 #include "callchain.h" 45 #include "print_binary.h" 46 #include "string2.h" 47 #include "syscalltbl.h" 48 #include "rb_resort.h" 49 50 #include <errno.h> 51 #include <inttypes.h> 52 #include <poll.h> 53 #include <signal.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <linux/err.h> 57 #include <linux/filter.h> 58 #include <linux/kernel.h> 59 #include <linux/random.h> 60 #include <linux/stringify.h> 61 #include <linux/time64.h> 62 #include <fcntl.h> 63 #include <sys/sysmacros.h> 64 65 #include "sane_ctype.h" 66 67 #ifndef O_CLOEXEC 68 # define O_CLOEXEC 02000000 69 #endif 70 71 #ifndef F_LINUX_SPECIFIC_BASE 72 # define F_LINUX_SPECIFIC_BASE 1024 73 #endif 74 75 struct trace { 76 struct perf_tool tool; 77 struct syscalltbl *sctbl; 78 struct { 79 int max; 80 struct syscall *table; 81 struct bpf_map *map; 82 struct { 83 struct perf_evsel *sys_enter, 84 *sys_exit, 85 *augmented; 86 } events; 87 } syscalls; 88 struct record_opts opts; 89 struct perf_evlist *evlist; 90 struct machine *host; 91 struct thread *current; 92 struct cgroup *cgroup; 93 u64 base_time; 94 FILE *output; 95 unsigned long nr_events; 96 unsigned long nr_events_printed; 97 unsigned long max_events; 98 struct strlist *ev_qualifier; 99 struct { 100 size_t nr; 101 int *entries; 102 } ev_qualifier_ids; 103 struct { 104 size_t nr; 105 pid_t *entries; 106 struct bpf_map *map; 107 } filter_pids; 108 double duration_filter; 109 double runtime_ms; 110 struct { 111 u64 vfs_getname, 112 proc_getname; 113 } stats; 114 unsigned int max_stack; 115 unsigned int min_stack; 116 int raw_augmented_syscalls_args_size; 117 bool raw_augmented_syscalls; 118 bool sort_events; 119 bool not_ev_qualifier; 120 bool live; 121 bool full_time; 122 bool sched; 123 bool multiple_threads; 124 bool summary; 125 bool summary_only; 126 bool failure_only; 127 bool show_comm; 128 bool print_sample; 129 bool show_tool_stats; 130 bool trace_syscalls; 131 bool kernel_syscallchains; 132 s16 args_alignment; 133 bool show_tstamp; 134 bool show_duration; 135 bool show_zeros; 136 bool show_arg_names; 137 bool show_string_prefix; 138 bool force; 139 bool vfs_getname; 140 int trace_pgfaults; 141 struct { 142 struct ordered_events data; 143 u64 last; 144 } oe; 145 }; 146 147 struct tp_field { 148 int offset; 149 union { 150 u64 (*integer)(struct tp_field *field, struct perf_sample *sample); 151 void *(*pointer)(struct tp_field *field, struct perf_sample *sample); 152 }; 153 }; 154 155 #define TP_UINT_FIELD(bits) \ 156 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \ 157 { \ 158 u##bits value; \ 159 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 160 return value; \ 161 } 162 163 TP_UINT_FIELD(8); 164 TP_UINT_FIELD(16); 165 TP_UINT_FIELD(32); 166 TP_UINT_FIELD(64); 167 168 #define TP_UINT_FIELD__SWAPPED(bits) \ 169 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \ 170 { \ 171 u##bits value; \ 172 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 173 return bswap_##bits(value);\ 174 } 175 176 TP_UINT_FIELD__SWAPPED(16); 177 TP_UINT_FIELD__SWAPPED(32); 178 TP_UINT_FIELD__SWAPPED(64); 179 180 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap) 181 { 182 field->offset = offset; 183 184 switch (size) { 185 case 1: 186 field->integer = tp_field__u8; 187 break; 188 case 2: 189 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16; 190 break; 191 case 4: 192 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32; 193 break; 194 case 8: 195 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64; 196 break; 197 default: 198 return -1; 199 } 200 201 return 0; 202 } 203 204 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap) 205 { 206 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap); 207 } 208 209 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample) 210 { 211 return sample->raw_data + field->offset; 212 } 213 214 static int __tp_field__init_ptr(struct tp_field *field, int offset) 215 { 216 field->offset = offset; 217 field->pointer = tp_field__ptr; 218 return 0; 219 } 220 221 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field) 222 { 223 return __tp_field__init_ptr(field, format_field->offset); 224 } 225 226 struct syscall_tp { 227 struct tp_field id; 228 union { 229 struct tp_field args, ret; 230 }; 231 }; 232 233 static int perf_evsel__init_tp_uint_field(struct perf_evsel *evsel, 234 struct tp_field *field, 235 const char *name) 236 { 237 struct tep_format_field *format_field = perf_evsel__field(evsel, name); 238 239 if (format_field == NULL) 240 return -1; 241 242 return tp_field__init_uint(field, format_field, evsel->needs_swap); 243 } 244 245 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \ 246 ({ struct syscall_tp *sc = evsel->priv;\ 247 perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); }) 248 249 static int perf_evsel__init_tp_ptr_field(struct perf_evsel *evsel, 250 struct tp_field *field, 251 const char *name) 252 { 253 struct tep_format_field *format_field = perf_evsel__field(evsel, name); 254 255 if (format_field == NULL) 256 return -1; 257 258 return tp_field__init_ptr(field, format_field); 259 } 260 261 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \ 262 ({ struct syscall_tp *sc = evsel->priv;\ 263 perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); }) 264 265 static void perf_evsel__delete_priv(struct perf_evsel *evsel) 266 { 267 zfree(&evsel->priv); 268 perf_evsel__delete(evsel); 269 } 270 271 static int perf_evsel__init_syscall_tp(struct perf_evsel *evsel) 272 { 273 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp)); 274 275 if (evsel->priv != NULL) { 276 if (perf_evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") && 277 perf_evsel__init_tp_uint_field(evsel, &sc->id, "nr")) 278 goto out_delete; 279 return 0; 280 } 281 282 return -ENOMEM; 283 out_delete: 284 zfree(&evsel->priv); 285 return -ENOENT; 286 } 287 288 static int perf_evsel__init_augmented_syscall_tp(struct perf_evsel *evsel, struct perf_evsel *tp) 289 { 290 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp)); 291 292 if (evsel->priv != NULL) { 293 struct tep_format_field *syscall_id = perf_evsel__field(tp, "id"); 294 if (syscall_id == NULL) 295 syscall_id = perf_evsel__field(tp, "__syscall_nr"); 296 if (syscall_id == NULL) 297 goto out_delete; 298 if (__tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap)) 299 goto out_delete; 300 301 return 0; 302 } 303 304 return -ENOMEM; 305 out_delete: 306 zfree(&evsel->priv); 307 return -EINVAL; 308 } 309 310 static int perf_evsel__init_augmented_syscall_tp_args(struct perf_evsel *evsel) 311 { 312 struct syscall_tp *sc = evsel->priv; 313 314 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)); 315 } 316 317 static int perf_evsel__init_augmented_syscall_tp_ret(struct perf_evsel *evsel) 318 { 319 struct syscall_tp *sc = evsel->priv; 320 321 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap); 322 } 323 324 static int perf_evsel__init_raw_syscall_tp(struct perf_evsel *evsel, void *handler) 325 { 326 evsel->priv = malloc(sizeof(struct syscall_tp)); 327 if (evsel->priv != NULL) { 328 if (perf_evsel__init_sc_tp_uint_field(evsel, id)) 329 goto out_delete; 330 331 evsel->handler = handler; 332 return 0; 333 } 334 335 return -ENOMEM; 336 337 out_delete: 338 zfree(&evsel->priv); 339 return -ENOENT; 340 } 341 342 static struct perf_evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler) 343 { 344 struct perf_evsel *evsel = perf_evsel__newtp("raw_syscalls", direction); 345 346 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */ 347 if (IS_ERR(evsel)) 348 evsel = perf_evsel__newtp("syscalls", direction); 349 350 if (IS_ERR(evsel)) 351 return NULL; 352 353 if (perf_evsel__init_raw_syscall_tp(evsel, handler)) 354 goto out_delete; 355 356 return evsel; 357 358 out_delete: 359 perf_evsel__delete_priv(evsel); 360 return NULL; 361 } 362 363 #define perf_evsel__sc_tp_uint(evsel, name, sample) \ 364 ({ struct syscall_tp *fields = evsel->priv; \ 365 fields->name.integer(&fields->name, sample); }) 366 367 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \ 368 ({ struct syscall_tp *fields = evsel->priv; \ 369 fields->name.pointer(&fields->name, sample); }) 370 371 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 372 { 373 int idx = val - sa->offset; 374 375 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { 376 size_t printed = scnprintf(bf, size, intfmt, val); 377 if (show_prefix) 378 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); 379 return printed; 380 } 381 382 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 383 } 384 385 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size, 386 const char *intfmt, 387 struct syscall_arg *arg) 388 { 389 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val); 390 } 391 392 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size, 393 struct syscall_arg *arg) 394 { 395 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg); 396 } 397 398 #define SCA_STRARRAY syscall_arg__scnprintf_strarray 399 400 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 401 { 402 size_t printed; 403 int i; 404 405 for (i = 0; i < sas->nr_entries; ++i) { 406 struct strarray *sa = sas->entries[i]; 407 int idx = val - sa->offset; 408 409 if (idx >= 0 && idx < sa->nr_entries) { 410 if (sa->entries[idx] == NULL) 411 break; 412 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 413 } 414 } 415 416 printed = scnprintf(bf, size, intfmt, val); 417 if (show_prefix) 418 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix); 419 return printed; 420 } 421 422 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size, 423 struct syscall_arg *arg) 424 { 425 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val); 426 } 427 428 #ifndef AT_FDCWD 429 #define AT_FDCWD -100 430 #endif 431 432 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size, 433 struct syscall_arg *arg) 434 { 435 int fd = arg->val; 436 const char *prefix = "AT_FD"; 437 438 if (fd == AT_FDCWD) 439 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD"); 440 441 return syscall_arg__scnprintf_fd(bf, size, arg); 442 } 443 444 #define SCA_FDAT syscall_arg__scnprintf_fd_at 445 446 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 447 struct syscall_arg *arg); 448 449 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd 450 451 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg) 452 { 453 return scnprintf(bf, size, "%#lx", arg->val); 454 } 455 456 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg) 457 { 458 if (arg->val == 0) 459 return scnprintf(bf, size, "NULL"); 460 return syscall_arg__scnprintf_hex(bf, size, arg); 461 } 462 463 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg) 464 { 465 return scnprintf(bf, size, "%d", arg->val); 466 } 467 468 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg) 469 { 470 return scnprintf(bf, size, "%ld", arg->val); 471 } 472 473 static const char *bpf_cmd[] = { 474 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM", 475 "MAP_GET_NEXT_KEY", "PROG_LOAD", 476 }; 477 static DEFINE_STRARRAY(bpf_cmd, "BPF_"); 478 479 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", }; 480 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1); 481 482 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", }; 483 static DEFINE_STRARRAY(itimers, "ITIMER_"); 484 485 static const char *keyctl_options[] = { 486 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN", 487 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ", 488 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT", 489 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT", 490 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT", 491 }; 492 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_"); 493 494 static const char *whences[] = { "SET", "CUR", "END", 495 #ifdef SEEK_DATA 496 "DATA", 497 #endif 498 #ifdef SEEK_HOLE 499 "HOLE", 500 #endif 501 }; 502 static DEFINE_STRARRAY(whences, "SEEK_"); 503 504 static const char *fcntl_cmds[] = { 505 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK", 506 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64", 507 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX", 508 "GETOWNER_UIDS", 509 }; 510 static DEFINE_STRARRAY(fcntl_cmds, "F_"); 511 512 static const char *fcntl_linux_specific_cmds[] = { 513 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC", 514 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS", 515 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT", 516 }; 517 518 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE); 519 520 static struct strarray *fcntl_cmds_arrays[] = { 521 &strarray__fcntl_cmds, 522 &strarray__fcntl_linux_specific_cmds, 523 }; 524 525 static DEFINE_STRARRAYS(fcntl_cmds_arrays); 526 527 static const char *rlimit_resources[] = { 528 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE", 529 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO", 530 "RTTIME", 531 }; 532 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_"); 533 534 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", }; 535 static DEFINE_STRARRAY(sighow, "SIG_"); 536 537 static const char *clockid[] = { 538 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID", 539 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME", 540 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI" 541 }; 542 static DEFINE_STRARRAY(clockid, "CLOCK_"); 543 544 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size, 545 struct syscall_arg *arg) 546 { 547 bool show_prefix = arg->show_string_prefix; 548 const char *suffix = "_OK"; 549 size_t printed = 0; 550 int mode = arg->val; 551 552 if (mode == F_OK) /* 0 */ 553 return scnprintf(bf, size, "F%s", show_prefix ? suffix : ""); 554 #define P_MODE(n) \ 555 if (mode & n##_OK) { \ 556 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \ 557 mode &= ~n##_OK; \ 558 } 559 560 P_MODE(R); 561 P_MODE(W); 562 P_MODE(X); 563 #undef P_MODE 564 565 if (mode) 566 printed += scnprintf(bf + printed, size - printed, "|%#x", mode); 567 568 return printed; 569 } 570 571 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode 572 573 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 574 struct syscall_arg *arg); 575 576 #define SCA_FILENAME syscall_arg__scnprintf_filename 577 578 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size, 579 struct syscall_arg *arg) 580 { 581 bool show_prefix = arg->show_string_prefix; 582 const char *prefix = "O_"; 583 int printed = 0, flags = arg->val; 584 585 #define P_FLAG(n) \ 586 if (flags & O_##n) { \ 587 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 588 flags &= ~O_##n; \ 589 } 590 591 P_FLAG(CLOEXEC); 592 P_FLAG(NONBLOCK); 593 #undef P_FLAG 594 595 if (flags) 596 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 597 598 return printed; 599 } 600 601 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags 602 603 #ifndef GRND_NONBLOCK 604 #define GRND_NONBLOCK 0x0001 605 #endif 606 #ifndef GRND_RANDOM 607 #define GRND_RANDOM 0x0002 608 #endif 609 610 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size, 611 struct syscall_arg *arg) 612 { 613 bool show_prefix = arg->show_string_prefix; 614 const char *prefix = "GRND_"; 615 int printed = 0, flags = arg->val; 616 617 #define P_FLAG(n) \ 618 if (flags & GRND_##n) { \ 619 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 620 flags &= ~GRND_##n; \ 621 } 622 623 P_FLAG(RANDOM); 624 P_FLAG(NONBLOCK); 625 #undef P_FLAG 626 627 if (flags) 628 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 629 630 return printed; 631 } 632 633 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags 634 635 #define STRARRAY(name, array) \ 636 { .scnprintf = SCA_STRARRAY, \ 637 .parm = &strarray__##array, } 638 639 #include "trace/beauty/arch_errno_names.c" 640 #include "trace/beauty/eventfd.c" 641 #include "trace/beauty/futex_op.c" 642 #include "trace/beauty/futex_val3.c" 643 #include "trace/beauty/mmap.c" 644 #include "trace/beauty/mode_t.c" 645 #include "trace/beauty/msg_flags.c" 646 #include "trace/beauty/open_flags.c" 647 #include "trace/beauty/perf_event_open.c" 648 #include "trace/beauty/pid.c" 649 #include "trace/beauty/sched_policy.c" 650 #include "trace/beauty/seccomp.c" 651 #include "trace/beauty/signum.c" 652 #include "trace/beauty/socket_type.c" 653 #include "trace/beauty/waitid_options.c" 654 655 struct syscall_arg_fmt { 656 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 657 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val); 658 void *parm; 659 const char *name; 660 bool show_zero; 661 }; 662 663 static struct syscall_fmt { 664 const char *name; 665 const char *alias; 666 struct syscall_arg_fmt arg[6]; 667 u8 nr_args; 668 bool errpid; 669 bool timeout; 670 bool hexret; 671 } syscall_fmts[] = { 672 { .name = "access", 673 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, }, 674 { .name = "arch_prctl", 675 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ }, 676 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, }, 677 { .name = "bind", 678 .arg = { [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ }, }, }, 679 { .name = "bpf", 680 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, }, 681 { .name = "brk", .hexret = true, 682 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, }, 683 { .name = "clock_gettime", 684 .arg = { [0] = STRARRAY(clk_id, clockid), }, }, 685 { .name = "clone", .errpid = true, .nr_args = 5, 686 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, }, 687 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, }, 688 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, }, 689 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, }, 690 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, }, 691 { .name = "close", 692 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, }, 693 { .name = "connect", 694 .arg = { [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ }, }, }, 695 { .name = "epoll_ctl", 696 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, }, 697 { .name = "eventfd2", 698 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, }, 699 { .name = "fchmodat", 700 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 701 { .name = "fchownat", 702 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 703 { .name = "fcntl", 704 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */ 705 .parm = &strarrays__fcntl_cmds_arrays, 706 .show_zero = true, }, 707 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, }, 708 { .name = "flock", 709 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, }, 710 { .name = "fstat", .alias = "newfstat", }, 711 { .name = "fstatat", .alias = "newfstatat", }, 712 { .name = "futex", 713 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ }, 714 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, }, 715 { .name = "futimesat", 716 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 717 { .name = "getitimer", 718 .arg = { [0] = STRARRAY(which, itimers), }, }, 719 { .name = "getpid", .errpid = true, }, 720 { .name = "getpgid", .errpid = true, }, 721 { .name = "getppid", .errpid = true, }, 722 { .name = "getrandom", 723 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, }, 724 { .name = "getrlimit", 725 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 726 { .name = "gettid", .errpid = true, }, 727 { .name = "ioctl", 728 .arg = { 729 #if defined(__i386__) || defined(__x86_64__) 730 /* 731 * FIXME: Make this available to all arches. 732 */ 733 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ }, 734 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 735 #else 736 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 737 #endif 738 { .name = "kcmp", .nr_args = 5, 739 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, }, 740 [1] = { .name = "pid2", .scnprintf = SCA_PID, }, 741 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, }, 742 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, }, 743 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, }, 744 { .name = "keyctl", 745 .arg = { [0] = STRARRAY(option, keyctl_options), }, }, 746 { .name = "kill", 747 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 748 { .name = "linkat", 749 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 750 { .name = "lseek", 751 .arg = { [2] = STRARRAY(whence, whences), }, }, 752 { .name = "lstat", .alias = "newlstat", }, 753 { .name = "madvise", 754 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 755 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, }, 756 { .name = "mkdirat", 757 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 758 { .name = "mknodat", 759 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 760 { .name = "mmap", .hexret = true, 761 /* The standard mmap maps to old_mmap on s390x */ 762 #if defined(__s390x__) 763 .alias = "old_mmap", 764 #endif 765 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 766 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ }, 767 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, }, 768 { .name = "mount", 769 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ }, 770 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ 771 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, }, 772 { .name = "mprotect", 773 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 774 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, }, 775 { .name = "mq_unlink", 776 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, }, 777 { .name = "mremap", .hexret = true, 778 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, }, 779 { .name = "name_to_handle_at", 780 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 781 { .name = "newfstatat", 782 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 783 { .name = "open", 784 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 785 { .name = "open_by_handle_at", 786 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 787 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 788 { .name = "openat", 789 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 790 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 791 { .name = "perf_event_open", 792 .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ }, 793 [3] = { .scnprintf = SCA_FD, /* group_fd */ }, 794 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, }, 795 { .name = "pipe2", 796 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, }, 797 { .name = "pkey_alloc", 798 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, }, 799 { .name = "pkey_free", 800 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, }, 801 { .name = "pkey_mprotect", 802 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 803 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 804 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, }, 805 { .name = "poll", .timeout = true, }, 806 { .name = "ppoll", .timeout = true, }, 807 { .name = "prctl", 808 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ }, 809 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ }, 810 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, }, 811 { .name = "pread", .alias = "pread64", }, 812 { .name = "preadv", .alias = "pread", }, 813 { .name = "prlimit64", 814 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, }, 815 { .name = "pwrite", .alias = "pwrite64", }, 816 { .name = "readlinkat", 817 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 818 { .name = "recvfrom", 819 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 820 { .name = "recvmmsg", 821 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 822 { .name = "recvmsg", 823 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 824 { .name = "renameat", 825 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 826 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, }, 827 { .name = "renameat2", 828 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 829 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, 830 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, }, 831 { .name = "rt_sigaction", 832 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 833 { .name = "rt_sigprocmask", 834 .arg = { [0] = STRARRAY(how, sighow), }, }, 835 { .name = "rt_sigqueueinfo", 836 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 837 { .name = "rt_tgsigqueueinfo", 838 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 839 { .name = "sched_setscheduler", 840 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, }, 841 { .name = "seccomp", 842 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ }, 843 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, }, 844 { .name = "select", .timeout = true, }, 845 { .name = "sendmmsg", 846 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 847 { .name = "sendmsg", 848 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 849 { .name = "sendto", 850 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, 851 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, }, 852 { .name = "set_tid_address", .errpid = true, }, 853 { .name = "setitimer", 854 .arg = { [0] = STRARRAY(which, itimers), }, }, 855 { .name = "setrlimit", 856 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 857 { .name = "socket", 858 .arg = { [0] = STRARRAY(family, socket_families), 859 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 860 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 861 { .name = "socketpair", 862 .arg = { [0] = STRARRAY(family, socket_families), 863 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 864 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 865 { .name = "stat", .alias = "newstat", }, 866 { .name = "statx", 867 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ }, 868 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } , 869 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, }, 870 { .name = "swapoff", 871 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 872 { .name = "swapon", 873 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 874 { .name = "symlinkat", 875 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 876 { .name = "tgkill", 877 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 878 { .name = "tkill", 879 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 880 { .name = "umount2", .alias = "umount", 881 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, }, 882 { .name = "uname", .alias = "newuname", }, 883 { .name = "unlinkat", 884 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 885 { .name = "utimensat", 886 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, }, 887 { .name = "wait4", .errpid = true, 888 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 889 { .name = "waitid", .errpid = true, 890 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 891 }; 892 893 static int syscall_fmt__cmp(const void *name, const void *fmtp) 894 { 895 const struct syscall_fmt *fmt = fmtp; 896 return strcmp(name, fmt->name); 897 } 898 899 static struct syscall_fmt *syscall_fmt__find(const char *name) 900 { 901 const int nmemb = ARRAY_SIZE(syscall_fmts); 902 return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp); 903 } 904 905 static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias) 906 { 907 int i, nmemb = ARRAY_SIZE(syscall_fmts); 908 909 for (i = 0; i < nmemb; ++i) { 910 if (syscall_fmts[i].alias && strcmp(syscall_fmts[i].alias, alias) == 0) 911 return &syscall_fmts[i]; 912 } 913 914 return NULL; 915 } 916 917 /* 918 * is_exit: is this "exit" or "exit_group"? 919 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter. 920 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc. 921 */ 922 struct syscall { 923 struct tep_event *tp_format; 924 int nr_args; 925 int args_size; 926 bool is_exit; 927 bool is_open; 928 struct tep_format_field *args; 929 const char *name; 930 struct syscall_fmt *fmt; 931 struct syscall_arg_fmt *arg_fmt; 932 }; 933 934 struct bpf_map_syscall_entry { 935 bool enabled; 936 }; 937 938 /* 939 * We need to have this 'calculated' boolean because in some cases we really 940 * don't know what is the duration of a syscall, for instance, when we start 941 * a session and some threads are waiting for a syscall to finish, say 'poll', 942 * in which case all we can do is to print "( ? ) for duration and for the 943 * start timestamp. 944 */ 945 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp) 946 { 947 double duration = (double)t / NSEC_PER_MSEC; 948 size_t printed = fprintf(fp, "("); 949 950 if (!calculated) 951 printed += fprintf(fp, " "); 952 else if (duration >= 1.0) 953 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration); 954 else if (duration >= 0.01) 955 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration); 956 else 957 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration); 958 return printed + fprintf(fp, "): "); 959 } 960 961 /** 962 * filename.ptr: The filename char pointer that will be vfs_getname'd 963 * filename.entry_str_pos: Where to insert the string translated from 964 * filename.ptr by the vfs_getname tracepoint/kprobe. 965 * ret_scnprintf: syscall args may set this to a different syscall return 966 * formatter, for instance, fcntl may return fds, file flags, etc. 967 */ 968 struct thread_trace { 969 u64 entry_time; 970 bool entry_pending; 971 unsigned long nr_events; 972 unsigned long pfmaj, pfmin; 973 char *entry_str; 974 double runtime_ms; 975 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 976 struct { 977 unsigned long ptr; 978 short int entry_str_pos; 979 bool pending_open; 980 unsigned int namelen; 981 char *name; 982 } filename; 983 struct { 984 int max; 985 struct file *table; 986 } files; 987 988 struct intlist *syscall_stats; 989 }; 990 991 static struct thread_trace *thread_trace__new(void) 992 { 993 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace)); 994 995 if (ttrace) 996 ttrace->files.max = -1; 997 998 ttrace->syscall_stats = intlist__new(NULL); 999 1000 return ttrace; 1001 } 1002 1003 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp) 1004 { 1005 struct thread_trace *ttrace; 1006 1007 if (thread == NULL) 1008 goto fail; 1009 1010 if (thread__priv(thread) == NULL) 1011 thread__set_priv(thread, thread_trace__new()); 1012 1013 if (thread__priv(thread) == NULL) 1014 goto fail; 1015 1016 ttrace = thread__priv(thread); 1017 ++ttrace->nr_events; 1018 1019 return ttrace; 1020 fail: 1021 color_fprintf(fp, PERF_COLOR_RED, 1022 "WARNING: not enough memory, dropping samples!\n"); 1023 return NULL; 1024 } 1025 1026 1027 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg, 1028 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg)) 1029 { 1030 struct thread_trace *ttrace = thread__priv(arg->thread); 1031 1032 ttrace->ret_scnprintf = ret_scnprintf; 1033 } 1034 1035 #define TRACE_PFMAJ (1 << 0) 1036 #define TRACE_PFMIN (1 << 1) 1037 1038 static const size_t trace__entry_str_size = 2048; 1039 1040 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd) 1041 { 1042 if (fd > ttrace->files.max) { 1043 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file)); 1044 1045 if (nfiles == NULL) 1046 return NULL; 1047 1048 if (ttrace->files.max != -1) { 1049 memset(nfiles + ttrace->files.max + 1, 0, 1050 (fd - ttrace->files.max) * sizeof(struct file)); 1051 } else { 1052 memset(nfiles, 0, (fd + 1) * sizeof(struct file)); 1053 } 1054 1055 ttrace->files.table = nfiles; 1056 ttrace->files.max = fd; 1057 } 1058 1059 return ttrace->files.table + fd; 1060 } 1061 1062 struct file *thread__files_entry(struct thread *thread, int fd) 1063 { 1064 return thread_trace__files_entry(thread__priv(thread), fd); 1065 } 1066 1067 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname) 1068 { 1069 struct thread_trace *ttrace = thread__priv(thread); 1070 struct file *file = thread_trace__files_entry(ttrace, fd); 1071 1072 if (file != NULL) { 1073 struct stat st; 1074 if (stat(pathname, &st) == 0) 1075 file->dev_maj = major(st.st_rdev); 1076 file->pathname = strdup(pathname); 1077 if (file->pathname) 1078 return 0; 1079 } 1080 1081 return -1; 1082 } 1083 1084 static int thread__read_fd_path(struct thread *thread, int fd) 1085 { 1086 char linkname[PATH_MAX], pathname[PATH_MAX]; 1087 struct stat st; 1088 int ret; 1089 1090 if (thread->pid_ == thread->tid) { 1091 scnprintf(linkname, sizeof(linkname), 1092 "/proc/%d/fd/%d", thread->pid_, fd); 1093 } else { 1094 scnprintf(linkname, sizeof(linkname), 1095 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd); 1096 } 1097 1098 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname)) 1099 return -1; 1100 1101 ret = readlink(linkname, pathname, sizeof(pathname)); 1102 1103 if (ret < 0 || ret > st.st_size) 1104 return -1; 1105 1106 pathname[ret] = '\0'; 1107 return trace__set_fd_pathname(thread, fd, pathname); 1108 } 1109 1110 static const char *thread__fd_path(struct thread *thread, int fd, 1111 struct trace *trace) 1112 { 1113 struct thread_trace *ttrace = thread__priv(thread); 1114 1115 if (ttrace == NULL) 1116 return NULL; 1117 1118 if (fd < 0) 1119 return NULL; 1120 1121 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) { 1122 if (!trace->live) 1123 return NULL; 1124 ++trace->stats.proc_getname; 1125 if (thread__read_fd_path(thread, fd)) 1126 return NULL; 1127 } 1128 1129 return ttrace->files.table[fd].pathname; 1130 } 1131 1132 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg) 1133 { 1134 int fd = arg->val; 1135 size_t printed = scnprintf(bf, size, "%d", fd); 1136 const char *path = thread__fd_path(arg->thread, fd, arg->trace); 1137 1138 if (path) 1139 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1140 1141 return printed; 1142 } 1143 1144 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size) 1145 { 1146 size_t printed = scnprintf(bf, size, "%d", fd); 1147 struct thread *thread = machine__find_thread(trace->host, pid, pid); 1148 1149 if (thread) { 1150 const char *path = thread__fd_path(thread, fd, trace); 1151 1152 if (path) 1153 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1154 1155 thread__put(thread); 1156 } 1157 1158 return printed; 1159 } 1160 1161 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 1162 struct syscall_arg *arg) 1163 { 1164 int fd = arg->val; 1165 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg); 1166 struct thread_trace *ttrace = thread__priv(arg->thread); 1167 1168 if (ttrace && fd >= 0 && fd <= ttrace->files.max) 1169 zfree(&ttrace->files.table[fd].pathname); 1170 1171 return printed; 1172 } 1173 1174 static void thread__set_filename_pos(struct thread *thread, const char *bf, 1175 unsigned long ptr) 1176 { 1177 struct thread_trace *ttrace = thread__priv(thread); 1178 1179 ttrace->filename.ptr = ptr; 1180 ttrace->filename.entry_str_pos = bf - ttrace->entry_str; 1181 } 1182 1183 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size) 1184 { 1185 struct augmented_arg *augmented_arg = arg->augmented.args; 1186 1187 return scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value); 1188 } 1189 1190 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 1191 struct syscall_arg *arg) 1192 { 1193 unsigned long ptr = arg->val; 1194 1195 if (arg->augmented.args) 1196 return syscall_arg__scnprintf_augmented_string(arg, bf, size); 1197 1198 if (!arg->trace->vfs_getname) 1199 return scnprintf(bf, size, "%#x", ptr); 1200 1201 thread__set_filename_pos(arg->thread, bf, ptr); 1202 return 0; 1203 } 1204 1205 static bool trace__filter_duration(struct trace *trace, double t) 1206 { 1207 return t < (trace->duration_filter * NSEC_PER_MSEC); 1208 } 1209 1210 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1211 { 1212 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC; 1213 1214 return fprintf(fp, "%10.3f ", ts); 1215 } 1216 1217 /* 1218 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are 1219 * using ttrace->entry_time for a thread that receives a sys_exit without 1220 * first having received a sys_enter ("poll" issued before tracing session 1221 * starts, lost sys_enter exit due to ring buffer overflow). 1222 */ 1223 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1224 { 1225 if (tstamp > 0) 1226 return __trace__fprintf_tstamp(trace, tstamp, fp); 1227 1228 return fprintf(fp, " ? "); 1229 } 1230 1231 static bool done = false; 1232 static bool interrupted = false; 1233 1234 static void sig_handler(int sig) 1235 { 1236 done = true; 1237 interrupted = sig == SIGINT; 1238 } 1239 1240 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp) 1241 { 1242 size_t printed = 0; 1243 1244 if (trace->multiple_threads) { 1245 if (trace->show_comm) 1246 printed += fprintf(fp, "%.14s/", thread__comm_str(thread)); 1247 printed += fprintf(fp, "%d ", thread->tid); 1248 } 1249 1250 return printed; 1251 } 1252 1253 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread, 1254 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp) 1255 { 1256 size_t printed = 0; 1257 1258 if (trace->show_tstamp) 1259 printed = trace__fprintf_tstamp(trace, tstamp, fp); 1260 if (trace->show_duration) 1261 printed += fprintf_duration(duration, duration_calculated, fp); 1262 return printed + trace__fprintf_comm_tid(trace, thread, fp); 1263 } 1264 1265 static int trace__process_event(struct trace *trace, struct machine *machine, 1266 union perf_event *event, struct perf_sample *sample) 1267 { 1268 int ret = 0; 1269 1270 switch (event->header.type) { 1271 case PERF_RECORD_LOST: 1272 color_fprintf(trace->output, PERF_COLOR_RED, 1273 "LOST %" PRIu64 " events!\n", event->lost.lost); 1274 ret = machine__process_lost_event(machine, event, sample); 1275 break; 1276 default: 1277 ret = machine__process_event(machine, event, sample); 1278 break; 1279 } 1280 1281 return ret; 1282 } 1283 1284 static int trace__tool_process(struct perf_tool *tool, 1285 union perf_event *event, 1286 struct perf_sample *sample, 1287 struct machine *machine) 1288 { 1289 struct trace *trace = container_of(tool, struct trace, tool); 1290 return trace__process_event(trace, machine, event, sample); 1291 } 1292 1293 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) 1294 { 1295 struct machine *machine = vmachine; 1296 1297 if (machine->kptr_restrict_warned) 1298 return NULL; 1299 1300 if (symbol_conf.kptr_restrict) { 1301 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" 1302 "Check /proc/sys/kernel/kptr_restrict.\n\n" 1303 "Kernel samples will not be resolved.\n"); 1304 machine->kptr_restrict_warned = true; 1305 return NULL; 1306 } 1307 1308 return machine__resolve_kernel_addr(vmachine, addrp, modp); 1309 } 1310 1311 static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist) 1312 { 1313 int err = symbol__init(NULL); 1314 1315 if (err) 1316 return err; 1317 1318 trace->host = machine__new_host(); 1319 if (trace->host == NULL) 1320 return -ENOMEM; 1321 1322 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr); 1323 if (err < 0) 1324 goto out; 1325 1326 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target, 1327 evlist->threads, trace__tool_process, false, 1328 1); 1329 out: 1330 if (err) 1331 symbol__exit(); 1332 1333 return err; 1334 } 1335 1336 static void trace__symbols__exit(struct trace *trace) 1337 { 1338 machine__exit(trace->host); 1339 trace->host = NULL; 1340 1341 symbol__exit(); 1342 } 1343 1344 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) 1345 { 1346 int idx; 1347 1348 if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0) 1349 nr_args = sc->fmt->nr_args; 1350 1351 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt)); 1352 if (sc->arg_fmt == NULL) 1353 return -1; 1354 1355 for (idx = 0; idx < nr_args; ++idx) { 1356 if (sc->fmt) 1357 sc->arg_fmt[idx] = sc->fmt->arg[idx]; 1358 } 1359 1360 sc->nr_args = nr_args; 1361 return 0; 1362 } 1363 1364 static int syscall__set_arg_fmts(struct syscall *sc) 1365 { 1366 struct tep_format_field *field, *last_field = NULL; 1367 int idx = 0, len; 1368 1369 for (field = sc->args; field; field = field->next, ++idx) { 1370 last_field = field; 1371 1372 if (sc->fmt && sc->fmt->arg[idx].scnprintf) 1373 continue; 1374 1375 if (strcmp(field->type, "const char *") == 0 && 1376 (strcmp(field->name, "filename") == 0 || 1377 strcmp(field->name, "path") == 0 || 1378 strcmp(field->name, "pathname") == 0)) 1379 sc->arg_fmt[idx].scnprintf = SCA_FILENAME; 1380 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr")) 1381 sc->arg_fmt[idx].scnprintf = SCA_PTR; 1382 else if (strcmp(field->type, "pid_t") == 0) 1383 sc->arg_fmt[idx].scnprintf = SCA_PID; 1384 else if (strcmp(field->type, "umode_t") == 0) 1385 sc->arg_fmt[idx].scnprintf = SCA_MODE_T; 1386 else if ((strcmp(field->type, "int") == 0 || 1387 strcmp(field->type, "unsigned int") == 0 || 1388 strcmp(field->type, "long") == 0) && 1389 (len = strlen(field->name)) >= 2 && 1390 strcmp(field->name + len - 2, "fd") == 0) { 1391 /* 1392 * /sys/kernel/tracing/events/syscalls/sys_enter* 1393 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c 1394 * 65 int 1395 * 23 unsigned int 1396 * 7 unsigned long 1397 */ 1398 sc->arg_fmt[idx].scnprintf = SCA_FD; 1399 } 1400 } 1401 1402 if (last_field) 1403 sc->args_size = last_field->offset + last_field->size; 1404 1405 return 0; 1406 } 1407 1408 static int trace__read_syscall_info(struct trace *trace, int id) 1409 { 1410 char tp_name[128]; 1411 struct syscall *sc; 1412 const char *name = syscalltbl__name(trace->sctbl, id); 1413 1414 if (name == NULL) 1415 return -1; 1416 1417 if (id > trace->syscalls.max) { 1418 struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc)); 1419 1420 if (nsyscalls == NULL) 1421 return -1; 1422 1423 if (trace->syscalls.max != -1) { 1424 memset(nsyscalls + trace->syscalls.max + 1, 0, 1425 (id - trace->syscalls.max) * sizeof(*sc)); 1426 } else { 1427 memset(nsyscalls, 0, (id + 1) * sizeof(*sc)); 1428 } 1429 1430 trace->syscalls.table = nsyscalls; 1431 trace->syscalls.max = id; 1432 } 1433 1434 sc = trace->syscalls.table + id; 1435 sc->name = name; 1436 1437 sc->fmt = syscall_fmt__find(sc->name); 1438 1439 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name); 1440 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1441 1442 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) { 1443 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias); 1444 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1445 } 1446 1447 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields)) 1448 return -1; 1449 1450 if (IS_ERR(sc->tp_format)) 1451 return -1; 1452 1453 sc->args = sc->tp_format->format.fields; 1454 /* 1455 * We need to check and discard the first variable '__syscall_nr' 1456 * or 'nr' that mean the syscall number. It is needless here. 1457 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels. 1458 */ 1459 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) { 1460 sc->args = sc->args->next; 1461 --sc->nr_args; 1462 } 1463 1464 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit"); 1465 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat"); 1466 1467 return syscall__set_arg_fmts(sc); 1468 } 1469 1470 static int trace__validate_ev_qualifier(struct trace *trace) 1471 { 1472 int err = 0, i; 1473 size_t nr_allocated; 1474 struct str_node *pos; 1475 1476 trace->ev_qualifier_ids.nr = strlist__nr_entries(trace->ev_qualifier); 1477 trace->ev_qualifier_ids.entries = malloc(trace->ev_qualifier_ids.nr * 1478 sizeof(trace->ev_qualifier_ids.entries[0])); 1479 1480 if (trace->ev_qualifier_ids.entries == NULL) { 1481 fputs("Error:\tNot enough memory for allocating events qualifier ids\n", 1482 trace->output); 1483 err = -EINVAL; 1484 goto out; 1485 } 1486 1487 nr_allocated = trace->ev_qualifier_ids.nr; 1488 i = 0; 1489 1490 strlist__for_each_entry(pos, trace->ev_qualifier) { 1491 const char *sc = pos->s; 1492 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1; 1493 1494 if (id < 0) { 1495 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next); 1496 if (id >= 0) 1497 goto matches; 1498 1499 if (err == 0) { 1500 fputs("Error:\tInvalid syscall ", trace->output); 1501 err = -EINVAL; 1502 } else { 1503 fputs(", ", trace->output); 1504 } 1505 1506 fputs(sc, trace->output); 1507 } 1508 matches: 1509 trace->ev_qualifier_ids.entries[i++] = id; 1510 if (match_next == -1) 1511 continue; 1512 1513 while (1) { 1514 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next); 1515 if (id < 0) 1516 break; 1517 if (nr_allocated == trace->ev_qualifier_ids.nr) { 1518 void *entries; 1519 1520 nr_allocated += 8; 1521 entries = realloc(trace->ev_qualifier_ids.entries, 1522 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0])); 1523 if (entries == NULL) { 1524 err = -ENOMEM; 1525 fputs("\nError:\t Not enough memory for parsing\n", trace->output); 1526 goto out_free; 1527 } 1528 trace->ev_qualifier_ids.entries = entries; 1529 } 1530 trace->ev_qualifier_ids.nr++; 1531 trace->ev_qualifier_ids.entries[i++] = id; 1532 } 1533 } 1534 1535 if (err < 0) { 1536 fputs("\nHint:\ttry 'perf list syscalls:sys_enter_*'" 1537 "\nHint:\tand: 'man syscalls'\n", trace->output); 1538 out_free: 1539 zfree(&trace->ev_qualifier_ids.entries); 1540 trace->ev_qualifier_ids.nr = 0; 1541 } 1542 out: 1543 return err; 1544 } 1545 1546 /* 1547 * args is to be interpreted as a series of longs but we need to handle 1548 * 8-byte unaligned accesses. args points to raw_data within the event 1549 * and raw_data is guaranteed to be 8-byte unaligned because it is 1550 * preceded by raw_size which is a u32. So we need to copy args to a temp 1551 * variable to read it. Most notably this avoids extended load instructions 1552 * on unaligned addresses 1553 */ 1554 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx) 1555 { 1556 unsigned long val; 1557 unsigned char *p = arg->args + sizeof(unsigned long) * idx; 1558 1559 memcpy(&val, p, sizeof(val)); 1560 return val; 1561 } 1562 1563 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size, 1564 struct syscall_arg *arg) 1565 { 1566 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name) 1567 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name); 1568 1569 return scnprintf(bf, size, "arg%d: ", arg->idx); 1570 } 1571 1572 /* 1573 * Check if the value is in fact zero, i.e. mask whatever needs masking, such 1574 * as mount 'flags' argument that needs ignoring some magic flag, see comment 1575 * in tools/perf/trace/beauty/mount_flags.c 1576 */ 1577 static unsigned long syscall__mask_val(struct syscall *sc, struct syscall_arg *arg, unsigned long val) 1578 { 1579 if (sc->arg_fmt && sc->arg_fmt[arg->idx].mask_val) 1580 return sc->arg_fmt[arg->idx].mask_val(arg, val); 1581 1582 return val; 1583 } 1584 1585 static size_t syscall__scnprintf_val(struct syscall *sc, char *bf, size_t size, 1586 struct syscall_arg *arg, unsigned long val) 1587 { 1588 if (sc->arg_fmt && sc->arg_fmt[arg->idx].scnprintf) { 1589 arg->val = val; 1590 if (sc->arg_fmt[arg->idx].parm) 1591 arg->parm = sc->arg_fmt[arg->idx].parm; 1592 return sc->arg_fmt[arg->idx].scnprintf(bf, size, arg); 1593 } 1594 return scnprintf(bf, size, "%ld", val); 1595 } 1596 1597 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, 1598 unsigned char *args, void *augmented_args, int augmented_args_size, 1599 struct trace *trace, struct thread *thread) 1600 { 1601 size_t printed = 0; 1602 unsigned long val; 1603 u8 bit = 1; 1604 struct syscall_arg arg = { 1605 .args = args, 1606 .augmented = { 1607 .size = augmented_args_size, 1608 .args = augmented_args, 1609 }, 1610 .idx = 0, 1611 .mask = 0, 1612 .trace = trace, 1613 .thread = thread, 1614 .show_string_prefix = trace->show_string_prefix, 1615 }; 1616 struct thread_trace *ttrace = thread__priv(thread); 1617 1618 /* 1619 * Things like fcntl will set this in its 'cmd' formatter to pick the 1620 * right formatter for the return value (an fd? file flags?), which is 1621 * not needed for syscalls that always return a given type, say an fd. 1622 */ 1623 ttrace->ret_scnprintf = NULL; 1624 1625 if (sc->args != NULL) { 1626 struct tep_format_field *field; 1627 1628 for (field = sc->args; field; 1629 field = field->next, ++arg.idx, bit <<= 1) { 1630 if (arg.mask & bit) 1631 continue; 1632 1633 val = syscall_arg__val(&arg, arg.idx); 1634 /* 1635 * Some syscall args need some mask, most don't and 1636 * return val untouched. 1637 */ 1638 val = syscall__mask_val(sc, &arg, val); 1639 1640 /* 1641 * Suppress this argument if its value is zero and 1642 * and we don't have a string associated in an 1643 * strarray for it. 1644 */ 1645 if (val == 0 && 1646 !trace->show_zeros && 1647 !(sc->arg_fmt && 1648 (sc->arg_fmt[arg.idx].show_zero || 1649 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY || 1650 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) && 1651 sc->arg_fmt[arg.idx].parm)) 1652 continue; 1653 1654 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); 1655 1656 if (trace->show_arg_names) 1657 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); 1658 1659 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val); 1660 } 1661 } else if (IS_ERR(sc->tp_format)) { 1662 /* 1663 * If we managed to read the tracepoint /format file, then we 1664 * may end up not having any args, like with gettid(), so only 1665 * print the raw args when we didn't manage to read it. 1666 */ 1667 while (arg.idx < sc->nr_args) { 1668 if (arg.mask & bit) 1669 goto next_arg; 1670 val = syscall_arg__val(&arg, arg.idx); 1671 if (printed) 1672 printed += scnprintf(bf + printed, size - printed, ", "); 1673 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg); 1674 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val); 1675 next_arg: 1676 ++arg.idx; 1677 bit <<= 1; 1678 } 1679 } 1680 1681 return printed; 1682 } 1683 1684 typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel, 1685 union perf_event *event, 1686 struct perf_sample *sample); 1687 1688 static struct syscall *trace__syscall_info(struct trace *trace, 1689 struct perf_evsel *evsel, int id) 1690 { 1691 1692 if (id < 0) { 1693 1694 /* 1695 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried 1696 * before that, leaving at a higher verbosity level till that is 1697 * explained. Reproduced with plain ftrace with: 1698 * 1699 * echo 1 > /t/events/raw_syscalls/sys_exit/enable 1700 * grep "NR -1 " /t/trace_pipe 1701 * 1702 * After generating some load on the machine. 1703 */ 1704 if (verbose > 1) { 1705 static u64 n; 1706 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n", 1707 id, perf_evsel__name(evsel), ++n); 1708 } 1709 return NULL; 1710 } 1711 1712 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) && 1713 trace__read_syscall_info(trace, id)) 1714 goto out_cant_read; 1715 1716 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL)) 1717 goto out_cant_read; 1718 1719 return &trace->syscalls.table[id]; 1720 1721 out_cant_read: 1722 if (verbose > 0) { 1723 fprintf(trace->output, "Problems reading syscall %d", id); 1724 if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL) 1725 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name); 1726 fputs(" information\n", trace->output); 1727 } 1728 return NULL; 1729 } 1730 1731 static void thread__update_stats(struct thread_trace *ttrace, 1732 int id, struct perf_sample *sample) 1733 { 1734 struct int_node *inode; 1735 struct stats *stats; 1736 u64 duration = 0; 1737 1738 inode = intlist__findnew(ttrace->syscall_stats, id); 1739 if (inode == NULL) 1740 return; 1741 1742 stats = inode->priv; 1743 if (stats == NULL) { 1744 stats = malloc(sizeof(struct stats)); 1745 if (stats == NULL) 1746 return; 1747 init_stats(stats); 1748 inode->priv = stats; 1749 } 1750 1751 if (ttrace->entry_time && sample->time > ttrace->entry_time) 1752 duration = sample->time - ttrace->entry_time; 1753 1754 update_stats(stats, duration); 1755 } 1756 1757 static int trace__printf_interrupted_entry(struct trace *trace) 1758 { 1759 struct thread_trace *ttrace; 1760 size_t printed; 1761 int len; 1762 1763 if (trace->failure_only || trace->current == NULL) 1764 return 0; 1765 1766 ttrace = thread__priv(trace->current); 1767 1768 if (!ttrace->entry_pending) 1769 return 0; 1770 1771 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output); 1772 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str); 1773 1774 if (len < trace->args_alignment - 4) 1775 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " "); 1776 1777 printed += fprintf(trace->output, " ...\n"); 1778 1779 ttrace->entry_pending = false; 1780 ++trace->nr_events_printed; 1781 1782 return printed; 1783 } 1784 1785 static int trace__fprintf_sample(struct trace *trace, struct perf_evsel *evsel, 1786 struct perf_sample *sample, struct thread *thread) 1787 { 1788 int printed = 0; 1789 1790 if (trace->print_sample) { 1791 double ts = (double)sample->time / NSEC_PER_MSEC; 1792 1793 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n", 1794 perf_evsel__name(evsel), ts, 1795 thread__comm_str(thread), 1796 sample->pid, sample->tid, sample->cpu); 1797 } 1798 1799 return printed; 1800 } 1801 1802 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size) 1803 { 1804 void *augmented_args = NULL; 1805 /* 1806 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter 1807 * and there we get all 6 syscall args plus the tracepoint common fields 1808 * that gets calculated at the start and the syscall_nr (another long). 1809 * So we check if that is the case and if so don't look after the 1810 * sc->args_size but always after the full raw_syscalls:sys_enter payload, 1811 * which is fixed. 1812 * 1813 * We'll revisit this later to pass s->args_size to the BPF augmenter 1814 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it 1815 * copies only what we need for each syscall, like what happens when we 1816 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace 1817 * traffic to just what is needed for each syscall. 1818 */ 1819 int args_size = raw_augmented_args_size ?: sc->args_size; 1820 1821 *augmented_args_size = sample->raw_size - args_size; 1822 if (*augmented_args_size > 0) 1823 augmented_args = sample->raw_data + args_size; 1824 1825 return augmented_args; 1826 } 1827 1828 static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel, 1829 union perf_event *event __maybe_unused, 1830 struct perf_sample *sample) 1831 { 1832 char *msg; 1833 void *args; 1834 int printed = 0; 1835 struct thread *thread; 1836 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 1837 int augmented_args_size = 0; 1838 void *augmented_args = NULL; 1839 struct syscall *sc = trace__syscall_info(trace, evsel, id); 1840 struct thread_trace *ttrace; 1841 1842 if (sc == NULL) 1843 return -1; 1844 1845 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 1846 ttrace = thread__trace(thread, trace->output); 1847 if (ttrace == NULL) 1848 goto out_put; 1849 1850 trace__fprintf_sample(trace, evsel, sample, thread); 1851 1852 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 1853 1854 if (ttrace->entry_str == NULL) { 1855 ttrace->entry_str = malloc(trace__entry_str_size); 1856 if (!ttrace->entry_str) 1857 goto out_put; 1858 } 1859 1860 if (!(trace->duration_filter || trace->summary_only || trace->min_stack)) 1861 trace__printf_interrupted_entry(trace); 1862 /* 1863 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible 1864 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments 1865 * this breaks syscall__augmented_args() check for augmented args, as we calculate 1866 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file, 1867 * so when handling, say the openat syscall, we end up getting 6 args for the 1868 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly 1869 * thinking that the extra 2 u64 args are the augmented filename, so just check 1870 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one. 1871 */ 1872 if (evsel != trace->syscalls.events.sys_enter) 1873 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 1874 ttrace->entry_time = sample->time; 1875 msg = ttrace->entry_str; 1876 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name); 1877 1878 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed, 1879 args, augmented_args, augmented_args_size, trace, thread); 1880 1881 if (sc->is_exit) { 1882 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) { 1883 int alignment = 0; 1884 1885 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output); 1886 printed = fprintf(trace->output, "%s)", ttrace->entry_str); 1887 if (trace->args_alignment > printed) 1888 alignment = trace->args_alignment - printed; 1889 fprintf(trace->output, "%*s= ?\n", alignment, " "); 1890 } 1891 } else { 1892 ttrace->entry_pending = true; 1893 /* See trace__vfs_getname & trace__sys_exit */ 1894 ttrace->filename.pending_open = false; 1895 } 1896 1897 if (trace->current != thread) { 1898 thread__put(trace->current); 1899 trace->current = thread__get(thread); 1900 } 1901 err = 0; 1902 out_put: 1903 thread__put(thread); 1904 return err; 1905 } 1906 1907 static int trace__fprintf_sys_enter(struct trace *trace, struct perf_evsel *evsel, 1908 struct perf_sample *sample) 1909 { 1910 struct thread_trace *ttrace; 1911 struct thread *thread; 1912 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 1913 struct syscall *sc = trace__syscall_info(trace, evsel, id); 1914 char msg[1024]; 1915 void *args, *augmented_args = NULL; 1916 int augmented_args_size; 1917 1918 if (sc == NULL) 1919 return -1; 1920 1921 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 1922 ttrace = thread__trace(thread, trace->output); 1923 /* 1924 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args() 1925 * and the rest of the beautifiers accessing it via struct syscall_arg touches it. 1926 */ 1927 if (ttrace == NULL) 1928 goto out_put; 1929 1930 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 1931 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 1932 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread); 1933 fprintf(trace->output, "%s", msg); 1934 err = 0; 1935 out_put: 1936 thread__put(thread); 1937 return err; 1938 } 1939 1940 static int trace__resolve_callchain(struct trace *trace, struct perf_evsel *evsel, 1941 struct perf_sample *sample, 1942 struct callchain_cursor *cursor) 1943 { 1944 struct addr_location al; 1945 int max_stack = evsel->attr.sample_max_stack ? 1946 evsel->attr.sample_max_stack : 1947 trace->max_stack; 1948 int err; 1949 1950 if (machine__resolve(trace->host, &al, sample) < 0) 1951 return -1; 1952 1953 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack); 1954 addr_location__put(&al); 1955 return err; 1956 } 1957 1958 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample) 1959 { 1960 /* TODO: user-configurable print_opts */ 1961 const unsigned int print_opts = EVSEL__PRINT_SYM | 1962 EVSEL__PRINT_DSO | 1963 EVSEL__PRINT_UNKNOWN_AS_ADDR; 1964 1965 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output); 1966 } 1967 1968 static const char *errno_to_name(struct perf_evsel *evsel, int err) 1969 { 1970 struct perf_env *env = perf_evsel__env(evsel); 1971 const char *arch_name = perf_env__arch(env); 1972 1973 return arch_syscalls__strerrno(arch_name, err); 1974 } 1975 1976 static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel, 1977 union perf_event *event __maybe_unused, 1978 struct perf_sample *sample) 1979 { 1980 long ret; 1981 u64 duration = 0; 1982 bool duration_calculated = false; 1983 struct thread *thread; 1984 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0; 1985 int alignment = trace->args_alignment; 1986 struct syscall *sc = trace__syscall_info(trace, evsel, id); 1987 struct thread_trace *ttrace; 1988 1989 if (sc == NULL) 1990 return -1; 1991 1992 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 1993 ttrace = thread__trace(thread, trace->output); 1994 if (ttrace == NULL) 1995 goto out_put; 1996 1997 trace__fprintf_sample(trace, evsel, sample, thread); 1998 1999 if (trace->summary) 2000 thread__update_stats(ttrace, id, sample); 2001 2002 ret = perf_evsel__sc_tp_uint(evsel, ret, sample); 2003 2004 if (sc->is_open && ret >= 0 && ttrace->filename.pending_open) { 2005 trace__set_fd_pathname(thread, ret, ttrace->filename.name); 2006 ttrace->filename.pending_open = false; 2007 ++trace->stats.vfs_getname; 2008 } 2009 2010 if (ttrace->entry_time) { 2011 duration = sample->time - ttrace->entry_time; 2012 if (trace__filter_duration(trace, duration)) 2013 goto out; 2014 duration_calculated = true; 2015 } else if (trace->duration_filter) 2016 goto out; 2017 2018 if (sample->callchain) { 2019 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2020 if (callchain_ret == 0) { 2021 if (callchain_cursor.nr < trace->min_stack) 2022 goto out; 2023 callchain_ret = 1; 2024 } 2025 } 2026 2027 if (trace->summary_only || (ret >= 0 && trace->failure_only)) 2028 goto out; 2029 2030 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output); 2031 2032 if (ttrace->entry_pending) { 2033 printed = fprintf(trace->output, "%s", ttrace->entry_str); 2034 } else { 2035 printed += fprintf(trace->output, " ... ["); 2036 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued"); 2037 printed += 9; 2038 printed += fprintf(trace->output, "]: %s()", sc->name); 2039 } 2040 2041 printed++; /* the closing ')' */ 2042 2043 if (alignment > printed) 2044 alignment -= printed; 2045 else 2046 alignment = 0; 2047 2048 fprintf(trace->output, ")%*s= ", alignment, " "); 2049 2050 if (sc->fmt == NULL) { 2051 if (ret < 0) 2052 goto errno_print; 2053 signed_print: 2054 fprintf(trace->output, "%ld", ret); 2055 } else if (ret < 0) { 2056 errno_print: { 2057 char bf[STRERR_BUFSIZE]; 2058 const char *emsg = str_error_r(-ret, bf, sizeof(bf)), 2059 *e = errno_to_name(evsel, -ret); 2060 2061 fprintf(trace->output, "-1 %s (%s)", e, emsg); 2062 } 2063 } else if (ret == 0 && sc->fmt->timeout) 2064 fprintf(trace->output, "0 (Timeout)"); 2065 else if (ttrace->ret_scnprintf) { 2066 char bf[1024]; 2067 struct syscall_arg arg = { 2068 .val = ret, 2069 .thread = thread, 2070 .trace = trace, 2071 }; 2072 ttrace->ret_scnprintf(bf, sizeof(bf), &arg); 2073 ttrace->ret_scnprintf = NULL; 2074 fprintf(trace->output, "%s", bf); 2075 } else if (sc->fmt->hexret) 2076 fprintf(trace->output, "%#lx", ret); 2077 else if (sc->fmt->errpid) { 2078 struct thread *child = machine__find_thread(trace->host, ret, ret); 2079 2080 if (child != NULL) { 2081 fprintf(trace->output, "%ld", ret); 2082 if (child->comm_set) 2083 fprintf(trace->output, " (%s)", thread__comm_str(child)); 2084 thread__put(child); 2085 } 2086 } else 2087 goto signed_print; 2088 2089 fputc('\n', trace->output); 2090 2091 /* 2092 * We only consider an 'event' for the sake of --max-events a non-filtered 2093 * sys_enter + sys_exit and other tracepoint events. 2094 */ 2095 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX) 2096 interrupted = true; 2097 2098 if (callchain_ret > 0) 2099 trace__fprintf_callchain(trace, sample); 2100 else if (callchain_ret < 0) 2101 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); 2102 out: 2103 ttrace->entry_pending = false; 2104 err = 0; 2105 out_put: 2106 thread__put(thread); 2107 return err; 2108 } 2109 2110 static int trace__vfs_getname(struct trace *trace, struct perf_evsel *evsel, 2111 union perf_event *event __maybe_unused, 2112 struct perf_sample *sample) 2113 { 2114 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2115 struct thread_trace *ttrace; 2116 size_t filename_len, entry_str_len, to_move; 2117 ssize_t remaining_space; 2118 char *pos; 2119 const char *filename = perf_evsel__rawptr(evsel, sample, "pathname"); 2120 2121 if (!thread) 2122 goto out; 2123 2124 ttrace = thread__priv(thread); 2125 if (!ttrace) 2126 goto out_put; 2127 2128 filename_len = strlen(filename); 2129 if (filename_len == 0) 2130 goto out_put; 2131 2132 if (ttrace->filename.namelen < filename_len) { 2133 char *f = realloc(ttrace->filename.name, filename_len + 1); 2134 2135 if (f == NULL) 2136 goto out_put; 2137 2138 ttrace->filename.namelen = filename_len; 2139 ttrace->filename.name = f; 2140 } 2141 2142 strcpy(ttrace->filename.name, filename); 2143 ttrace->filename.pending_open = true; 2144 2145 if (!ttrace->filename.ptr) 2146 goto out_put; 2147 2148 entry_str_len = strlen(ttrace->entry_str); 2149 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */ 2150 if (remaining_space <= 0) 2151 goto out_put; 2152 2153 if (filename_len > (size_t)remaining_space) { 2154 filename += filename_len - remaining_space; 2155 filename_len = remaining_space; 2156 } 2157 2158 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */ 2159 pos = ttrace->entry_str + ttrace->filename.entry_str_pos; 2160 memmove(pos + filename_len, pos, to_move); 2161 memcpy(pos, filename, filename_len); 2162 2163 ttrace->filename.ptr = 0; 2164 ttrace->filename.entry_str_pos = 0; 2165 out_put: 2166 thread__put(thread); 2167 out: 2168 return 0; 2169 } 2170 2171 static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel, 2172 union perf_event *event __maybe_unused, 2173 struct perf_sample *sample) 2174 { 2175 u64 runtime = perf_evsel__intval(evsel, sample, "runtime"); 2176 double runtime_ms = (double)runtime / NSEC_PER_MSEC; 2177 struct thread *thread = machine__findnew_thread(trace->host, 2178 sample->pid, 2179 sample->tid); 2180 struct thread_trace *ttrace = thread__trace(thread, trace->output); 2181 2182 if (ttrace == NULL) 2183 goto out_dump; 2184 2185 ttrace->runtime_ms += runtime_ms; 2186 trace->runtime_ms += runtime_ms; 2187 out_put: 2188 thread__put(thread); 2189 return 0; 2190 2191 out_dump: 2192 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n", 2193 evsel->name, 2194 perf_evsel__strval(evsel, sample, "comm"), 2195 (pid_t)perf_evsel__intval(evsel, sample, "pid"), 2196 runtime, 2197 perf_evsel__intval(evsel, sample, "vruntime")); 2198 goto out_put; 2199 } 2200 2201 static int bpf_output__printer(enum binary_printer_ops op, 2202 unsigned int val, void *extra __maybe_unused, FILE *fp) 2203 { 2204 unsigned char ch = (unsigned char)val; 2205 2206 switch (op) { 2207 case BINARY_PRINT_CHAR_DATA: 2208 return fprintf(fp, "%c", isprint(ch) ? ch : '.'); 2209 case BINARY_PRINT_DATA_BEGIN: 2210 case BINARY_PRINT_LINE_BEGIN: 2211 case BINARY_PRINT_ADDR: 2212 case BINARY_PRINT_NUM_DATA: 2213 case BINARY_PRINT_NUM_PAD: 2214 case BINARY_PRINT_SEP: 2215 case BINARY_PRINT_CHAR_PAD: 2216 case BINARY_PRINT_LINE_END: 2217 case BINARY_PRINT_DATA_END: 2218 default: 2219 break; 2220 } 2221 2222 return 0; 2223 } 2224 2225 static void bpf_output__fprintf(struct trace *trace, 2226 struct perf_sample *sample) 2227 { 2228 binary__fprintf(sample->raw_data, sample->raw_size, 8, 2229 bpf_output__printer, NULL, trace->output); 2230 ++trace->nr_events_printed; 2231 } 2232 2233 static int trace__event_handler(struct trace *trace, struct perf_evsel *evsel, 2234 union perf_event *event __maybe_unused, 2235 struct perf_sample *sample) 2236 { 2237 struct thread *thread; 2238 int callchain_ret = 0; 2239 /* 2240 * Check if we called perf_evsel__disable(evsel) due to, for instance, 2241 * this event's max_events having been hit and this is an entry coming 2242 * from the ring buffer that we should discard, since the max events 2243 * have already been considered/printed. 2244 */ 2245 if (evsel->disabled) 2246 return 0; 2247 2248 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2249 2250 if (sample->callchain) { 2251 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2252 if (callchain_ret == 0) { 2253 if (callchain_cursor.nr < trace->min_stack) 2254 goto out; 2255 callchain_ret = 1; 2256 } 2257 } 2258 2259 trace__printf_interrupted_entry(trace); 2260 trace__fprintf_tstamp(trace, sample->time, trace->output); 2261 2262 if (trace->trace_syscalls && trace->show_duration) 2263 fprintf(trace->output, "( ): "); 2264 2265 if (thread) 2266 trace__fprintf_comm_tid(trace, thread, trace->output); 2267 2268 if (evsel == trace->syscalls.events.augmented) { 2269 int id = perf_evsel__sc_tp_uint(evsel, id, sample); 2270 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2271 2272 if (sc) { 2273 fprintf(trace->output, "%s(", sc->name); 2274 trace__fprintf_sys_enter(trace, evsel, sample); 2275 fputc(')', trace->output); 2276 goto newline; 2277 } 2278 2279 /* 2280 * XXX: Not having the associated syscall info or not finding/adding 2281 * the thread should never happen, but if it does... 2282 * fall thru and print it as a bpf_output event. 2283 */ 2284 } 2285 2286 fprintf(trace->output, "%s:", evsel->name); 2287 2288 if (perf_evsel__is_bpf_output(evsel)) { 2289 bpf_output__fprintf(trace, sample); 2290 } else if (evsel->tp_format) { 2291 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) || 2292 trace__fprintf_sys_enter(trace, evsel, sample)) { 2293 event_format__fprintf(evsel->tp_format, sample->cpu, 2294 sample->raw_data, sample->raw_size, 2295 trace->output); 2296 ++trace->nr_events_printed; 2297 2298 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) { 2299 perf_evsel__disable(evsel); 2300 perf_evsel__close(evsel); 2301 } 2302 } 2303 } 2304 2305 newline: 2306 fprintf(trace->output, "\n"); 2307 2308 if (callchain_ret > 0) 2309 trace__fprintf_callchain(trace, sample); 2310 else if (callchain_ret < 0) 2311 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); 2312 out: 2313 thread__put(thread); 2314 return 0; 2315 } 2316 2317 static void print_location(FILE *f, struct perf_sample *sample, 2318 struct addr_location *al, 2319 bool print_dso, bool print_sym) 2320 { 2321 2322 if ((verbose > 0 || print_dso) && al->map) 2323 fprintf(f, "%s@", al->map->dso->long_name); 2324 2325 if ((verbose > 0 || print_sym) && al->sym) 2326 fprintf(f, "%s+0x%" PRIx64, al->sym->name, 2327 al->addr - al->sym->start); 2328 else if (al->map) 2329 fprintf(f, "0x%" PRIx64, al->addr); 2330 else 2331 fprintf(f, "0x%" PRIx64, sample->addr); 2332 } 2333 2334 static int trace__pgfault(struct trace *trace, 2335 struct perf_evsel *evsel, 2336 union perf_event *event __maybe_unused, 2337 struct perf_sample *sample) 2338 { 2339 struct thread *thread; 2340 struct addr_location al; 2341 char map_type = 'd'; 2342 struct thread_trace *ttrace; 2343 int err = -1; 2344 int callchain_ret = 0; 2345 2346 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2347 2348 if (sample->callchain) { 2349 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2350 if (callchain_ret == 0) { 2351 if (callchain_cursor.nr < trace->min_stack) 2352 goto out_put; 2353 callchain_ret = 1; 2354 } 2355 } 2356 2357 ttrace = thread__trace(thread, trace->output); 2358 if (ttrace == NULL) 2359 goto out_put; 2360 2361 if (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ) 2362 ttrace->pfmaj++; 2363 else 2364 ttrace->pfmin++; 2365 2366 if (trace->summary_only) 2367 goto out; 2368 2369 thread__find_symbol(thread, sample->cpumode, sample->ip, &al); 2370 2371 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output); 2372 2373 fprintf(trace->output, "%sfault [", 2374 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ? 2375 "maj" : "min"); 2376 2377 print_location(trace->output, sample, &al, false, true); 2378 2379 fprintf(trace->output, "] => "); 2380 2381 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2382 2383 if (!al.map) { 2384 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2385 2386 if (al.map) 2387 map_type = 'x'; 2388 else 2389 map_type = '?'; 2390 } 2391 2392 print_location(trace->output, sample, &al, true, false); 2393 2394 fprintf(trace->output, " (%c%c)\n", map_type, al.level); 2395 2396 if (callchain_ret > 0) 2397 trace__fprintf_callchain(trace, sample); 2398 else if (callchain_ret < 0) 2399 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); 2400 2401 ++trace->nr_events_printed; 2402 out: 2403 err = 0; 2404 out_put: 2405 thread__put(thread); 2406 return err; 2407 } 2408 2409 static void trace__set_base_time(struct trace *trace, 2410 struct perf_evsel *evsel, 2411 struct perf_sample *sample) 2412 { 2413 /* 2414 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust 2415 * and don't use sample->time unconditionally, we may end up having 2416 * some other event in the future without PERF_SAMPLE_TIME for good 2417 * reason, i.e. we may not be interested in its timestamps, just in 2418 * it taking place, picking some piece of information when it 2419 * appears in our event stream (vfs_getname comes to mind). 2420 */ 2421 if (trace->base_time == 0 && !trace->full_time && 2422 (evsel->attr.sample_type & PERF_SAMPLE_TIME)) 2423 trace->base_time = sample->time; 2424 } 2425 2426 static int trace__process_sample(struct perf_tool *tool, 2427 union perf_event *event, 2428 struct perf_sample *sample, 2429 struct perf_evsel *evsel, 2430 struct machine *machine __maybe_unused) 2431 { 2432 struct trace *trace = container_of(tool, struct trace, tool); 2433 struct thread *thread; 2434 int err = 0; 2435 2436 tracepoint_handler handler = evsel->handler; 2437 2438 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2439 if (thread && thread__is_filtered(thread)) 2440 goto out; 2441 2442 trace__set_base_time(trace, evsel, sample); 2443 2444 if (handler) { 2445 ++trace->nr_events; 2446 handler(trace, evsel, event, sample); 2447 } 2448 out: 2449 thread__put(thread); 2450 return err; 2451 } 2452 2453 static int trace__record(struct trace *trace, int argc, const char **argv) 2454 { 2455 unsigned int rec_argc, i, j; 2456 const char **rec_argv; 2457 const char * const record_args[] = { 2458 "record", 2459 "-R", 2460 "-m", "1024", 2461 "-c", "1", 2462 }; 2463 2464 const char * const sc_args[] = { "-e", }; 2465 unsigned int sc_args_nr = ARRAY_SIZE(sc_args); 2466 const char * const majpf_args[] = { "-e", "major-faults" }; 2467 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args); 2468 const char * const minpf_args[] = { "-e", "minor-faults" }; 2469 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args); 2470 2471 /* +1 is for the event string below */ 2472 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 + 2473 majpf_args_nr + minpf_args_nr + argc; 2474 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 2475 2476 if (rec_argv == NULL) 2477 return -ENOMEM; 2478 2479 j = 0; 2480 for (i = 0; i < ARRAY_SIZE(record_args); i++) 2481 rec_argv[j++] = record_args[i]; 2482 2483 if (trace->trace_syscalls) { 2484 for (i = 0; i < sc_args_nr; i++) 2485 rec_argv[j++] = sc_args[i]; 2486 2487 /* event string may be different for older kernels - e.g., RHEL6 */ 2488 if (is_valid_tracepoint("raw_syscalls:sys_enter")) 2489 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit"; 2490 else if (is_valid_tracepoint("syscalls:sys_enter")) 2491 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit"; 2492 else { 2493 pr_err("Neither raw_syscalls nor syscalls events exist.\n"); 2494 free(rec_argv); 2495 return -1; 2496 } 2497 } 2498 2499 if (trace->trace_pgfaults & TRACE_PFMAJ) 2500 for (i = 0; i < majpf_args_nr; i++) 2501 rec_argv[j++] = majpf_args[i]; 2502 2503 if (trace->trace_pgfaults & TRACE_PFMIN) 2504 for (i = 0; i < minpf_args_nr; i++) 2505 rec_argv[j++] = minpf_args[i]; 2506 2507 for (i = 0; i < (unsigned int)argc; i++) 2508 rec_argv[j++] = argv[i]; 2509 2510 return cmd_record(j, rec_argv); 2511 } 2512 2513 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp); 2514 2515 static bool perf_evlist__add_vfs_getname(struct perf_evlist *evlist) 2516 { 2517 struct perf_evsel *evsel = perf_evsel__newtp("probe", "vfs_getname"); 2518 2519 if (IS_ERR(evsel)) 2520 return false; 2521 2522 if (perf_evsel__field(evsel, "pathname") == NULL) { 2523 perf_evsel__delete(evsel); 2524 return false; 2525 } 2526 2527 evsel->handler = trace__vfs_getname; 2528 perf_evlist__add(evlist, evsel); 2529 return true; 2530 } 2531 2532 static struct perf_evsel *perf_evsel__new_pgfault(u64 config) 2533 { 2534 struct perf_evsel *evsel; 2535 struct perf_event_attr attr = { 2536 .type = PERF_TYPE_SOFTWARE, 2537 .mmap_data = 1, 2538 }; 2539 2540 attr.config = config; 2541 attr.sample_period = 1; 2542 2543 event_attr_init(&attr); 2544 2545 evsel = perf_evsel__new(&attr); 2546 if (evsel) 2547 evsel->handler = trace__pgfault; 2548 2549 return evsel; 2550 } 2551 2552 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample) 2553 { 2554 const u32 type = event->header.type; 2555 struct perf_evsel *evsel; 2556 2557 if (type != PERF_RECORD_SAMPLE) { 2558 trace__process_event(trace, trace->host, event, sample); 2559 return; 2560 } 2561 2562 evsel = perf_evlist__id2evsel(trace->evlist, sample->id); 2563 if (evsel == NULL) { 2564 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id); 2565 return; 2566 } 2567 2568 trace__set_base_time(trace, evsel, sample); 2569 2570 if (evsel->attr.type == PERF_TYPE_TRACEPOINT && 2571 sample->raw_data == NULL) { 2572 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n", 2573 perf_evsel__name(evsel), sample->tid, 2574 sample->cpu, sample->raw_size); 2575 } else { 2576 tracepoint_handler handler = evsel->handler; 2577 handler(trace, evsel, event, sample); 2578 } 2579 2580 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX) 2581 interrupted = true; 2582 } 2583 2584 static int trace__add_syscall_newtp(struct trace *trace) 2585 { 2586 int ret = -1; 2587 struct perf_evlist *evlist = trace->evlist; 2588 struct perf_evsel *sys_enter, *sys_exit; 2589 2590 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter); 2591 if (sys_enter == NULL) 2592 goto out; 2593 2594 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args)) 2595 goto out_delete_sys_enter; 2596 2597 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit); 2598 if (sys_exit == NULL) 2599 goto out_delete_sys_enter; 2600 2601 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret)) 2602 goto out_delete_sys_exit; 2603 2604 perf_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param); 2605 perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param); 2606 2607 perf_evlist__add(evlist, sys_enter); 2608 perf_evlist__add(evlist, sys_exit); 2609 2610 if (callchain_param.enabled && !trace->kernel_syscallchains) { 2611 /* 2612 * We're interested only in the user space callchain 2613 * leading to the syscall, allow overriding that for 2614 * debugging reasons using --kernel_syscall_callchains 2615 */ 2616 sys_exit->attr.exclude_callchain_kernel = 1; 2617 } 2618 2619 trace->syscalls.events.sys_enter = sys_enter; 2620 trace->syscalls.events.sys_exit = sys_exit; 2621 2622 ret = 0; 2623 out: 2624 return ret; 2625 2626 out_delete_sys_exit: 2627 perf_evsel__delete_priv(sys_exit); 2628 out_delete_sys_enter: 2629 perf_evsel__delete_priv(sys_enter); 2630 goto out; 2631 } 2632 2633 static int trace__set_ev_qualifier_tp_filter(struct trace *trace) 2634 { 2635 int err = -1; 2636 struct perf_evsel *sys_exit; 2637 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier, 2638 trace->ev_qualifier_ids.nr, 2639 trace->ev_qualifier_ids.entries); 2640 2641 if (filter == NULL) 2642 goto out_enomem; 2643 2644 if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter, 2645 filter)) { 2646 sys_exit = trace->syscalls.events.sys_exit; 2647 err = perf_evsel__append_tp_filter(sys_exit, filter); 2648 } 2649 2650 free(filter); 2651 out: 2652 return err; 2653 out_enomem: 2654 errno = ENOMEM; 2655 goto out; 2656 } 2657 2658 #ifdef HAVE_LIBBPF_SUPPORT 2659 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace) 2660 { 2661 int fd = bpf_map__fd(trace->syscalls.map); 2662 struct bpf_map_syscall_entry value = { 2663 .enabled = !trace->not_ev_qualifier, 2664 }; 2665 int err = 0; 2666 size_t i; 2667 2668 for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) { 2669 int key = trace->ev_qualifier_ids.entries[i]; 2670 2671 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST); 2672 if (err) 2673 break; 2674 } 2675 2676 return err; 2677 } 2678 2679 static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled) 2680 { 2681 int fd = bpf_map__fd(trace->syscalls.map); 2682 struct bpf_map_syscall_entry value = { 2683 .enabled = enabled, 2684 }; 2685 int err = 0, key; 2686 2687 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 2688 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY); 2689 if (err) 2690 break; 2691 } 2692 2693 return err; 2694 } 2695 2696 static int trace__init_syscalls_bpf_map(struct trace *trace) 2697 { 2698 bool enabled = true; 2699 2700 if (trace->ev_qualifier_ids.nr) 2701 enabled = trace->not_ev_qualifier; 2702 2703 return __trace__init_syscalls_bpf_map(trace, enabled); 2704 } 2705 #else 2706 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused) 2707 { 2708 return 0; 2709 } 2710 2711 static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused) 2712 { 2713 return 0; 2714 } 2715 #endif // HAVE_LIBBPF_SUPPORT 2716 2717 static int trace__set_ev_qualifier_filter(struct trace *trace) 2718 { 2719 if (trace->syscalls.map) 2720 return trace__set_ev_qualifier_bpf_filter(trace); 2721 if (trace->syscalls.events.sys_enter) 2722 return trace__set_ev_qualifier_tp_filter(trace); 2723 return 0; 2724 } 2725 2726 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused, 2727 size_t npids __maybe_unused, pid_t *pids __maybe_unused) 2728 { 2729 int err = 0; 2730 #ifdef HAVE_LIBBPF_SUPPORT 2731 bool value = true; 2732 int map_fd = bpf_map__fd(map); 2733 size_t i; 2734 2735 for (i = 0; i < npids; ++i) { 2736 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY); 2737 if (err) 2738 break; 2739 } 2740 #endif 2741 return err; 2742 } 2743 2744 static int trace__set_filter_loop_pids(struct trace *trace) 2745 { 2746 unsigned int nr = 1, err; 2747 pid_t pids[32] = { 2748 getpid(), 2749 }; 2750 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]); 2751 2752 while (thread && nr < ARRAY_SIZE(pids)) { 2753 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid); 2754 2755 if (parent == NULL) 2756 break; 2757 2758 if (!strcmp(thread__comm_str(parent), "sshd")) { 2759 pids[nr++] = parent->tid; 2760 break; 2761 } 2762 thread = parent; 2763 } 2764 2765 err = perf_evlist__set_tp_filter_pids(trace->evlist, nr, pids); 2766 if (!err && trace->filter_pids.map) 2767 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids); 2768 2769 return err; 2770 } 2771 2772 static int trace__set_filter_pids(struct trace *trace) 2773 { 2774 int err = 0; 2775 /* 2776 * Better not use !target__has_task() here because we need to cover the 2777 * case where no threads were specified in the command line, but a 2778 * workload was, and in that case we will fill in the thread_map when 2779 * we fork the workload in perf_evlist__prepare_workload. 2780 */ 2781 if (trace->filter_pids.nr > 0) { 2782 err = perf_evlist__set_tp_filter_pids(trace->evlist, trace->filter_pids.nr, 2783 trace->filter_pids.entries); 2784 if (!err && trace->filter_pids.map) { 2785 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr, 2786 trace->filter_pids.entries); 2787 } 2788 } else if (thread_map__pid(trace->evlist->threads, 0) == -1) { 2789 err = trace__set_filter_loop_pids(trace); 2790 } 2791 2792 return err; 2793 } 2794 2795 static int __trace__deliver_event(struct trace *trace, union perf_event *event) 2796 { 2797 struct perf_evlist *evlist = trace->evlist; 2798 struct perf_sample sample; 2799 int err; 2800 2801 err = perf_evlist__parse_sample(evlist, event, &sample); 2802 if (err) 2803 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err); 2804 else 2805 trace__handle_event(trace, event, &sample); 2806 2807 return 0; 2808 } 2809 2810 static int __trace__flush_events(struct trace *trace) 2811 { 2812 u64 first = ordered_events__first_time(&trace->oe.data); 2813 u64 flush = trace->oe.last - NSEC_PER_SEC; 2814 2815 /* Is there some thing to flush.. */ 2816 if (first && first < flush) 2817 return ordered_events__flush_time(&trace->oe.data, flush); 2818 2819 return 0; 2820 } 2821 2822 static int trace__flush_events(struct trace *trace) 2823 { 2824 return !trace->sort_events ? 0 : __trace__flush_events(trace); 2825 } 2826 2827 static int trace__deliver_event(struct trace *trace, union perf_event *event) 2828 { 2829 int err; 2830 2831 if (!trace->sort_events) 2832 return __trace__deliver_event(trace, event); 2833 2834 err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last); 2835 if (err && err != -1) 2836 return err; 2837 2838 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0); 2839 if (err) 2840 return err; 2841 2842 return trace__flush_events(trace); 2843 } 2844 2845 static int ordered_events__deliver_event(struct ordered_events *oe, 2846 struct ordered_event *event) 2847 { 2848 struct trace *trace = container_of(oe, struct trace, oe.data); 2849 2850 return __trace__deliver_event(trace, event->event); 2851 } 2852 2853 static int trace__run(struct trace *trace, int argc, const char **argv) 2854 { 2855 struct perf_evlist *evlist = trace->evlist; 2856 struct perf_evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL; 2857 int err = -1, i; 2858 unsigned long before; 2859 const bool forks = argc > 0; 2860 bool draining = false; 2861 2862 trace->live = true; 2863 2864 if (!trace->raw_augmented_syscalls) { 2865 if (trace->trace_syscalls && trace__add_syscall_newtp(trace)) 2866 goto out_error_raw_syscalls; 2867 2868 if (trace->trace_syscalls) 2869 trace->vfs_getname = perf_evlist__add_vfs_getname(evlist); 2870 } 2871 2872 if ((trace->trace_pgfaults & TRACE_PFMAJ)) { 2873 pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ); 2874 if (pgfault_maj == NULL) 2875 goto out_error_mem; 2876 perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param); 2877 perf_evlist__add(evlist, pgfault_maj); 2878 } 2879 2880 if ((trace->trace_pgfaults & TRACE_PFMIN)) { 2881 pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN); 2882 if (pgfault_min == NULL) 2883 goto out_error_mem; 2884 perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param); 2885 perf_evlist__add(evlist, pgfault_min); 2886 } 2887 2888 if (trace->sched && 2889 perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime", 2890 trace__sched_stat_runtime)) 2891 goto out_error_sched_stat_runtime; 2892 2893 /* 2894 * If a global cgroup was set, apply it to all the events without an 2895 * explicit cgroup. I.e.: 2896 * 2897 * trace -G A -e sched:*switch 2898 * 2899 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc 2900 * _and_ sched:sched_switch to the 'A' cgroup, while: 2901 * 2902 * trace -e sched:*switch -G A 2903 * 2904 * will only set the sched:sched_switch event to the 'A' cgroup, all the 2905 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without" 2906 * a cgroup (on the root cgroup, sys wide, etc). 2907 * 2908 * Multiple cgroups: 2909 * 2910 * trace -G A -e sched:*switch -G B 2911 * 2912 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes 2913 * to the 'B' cgroup. 2914 * 2915 * evlist__set_default_cgroup() grabs a reference of the passed cgroup 2916 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL. 2917 */ 2918 if (trace->cgroup) 2919 evlist__set_default_cgroup(trace->evlist, trace->cgroup); 2920 2921 err = perf_evlist__create_maps(evlist, &trace->opts.target); 2922 if (err < 0) { 2923 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n"); 2924 goto out_delete_evlist; 2925 } 2926 2927 err = trace__symbols_init(trace, evlist); 2928 if (err < 0) { 2929 fprintf(trace->output, "Problems initializing symbol libraries!\n"); 2930 goto out_delete_evlist; 2931 } 2932 2933 perf_evlist__config(evlist, &trace->opts, &callchain_param); 2934 2935 signal(SIGCHLD, sig_handler); 2936 signal(SIGINT, sig_handler); 2937 2938 if (forks) { 2939 err = perf_evlist__prepare_workload(evlist, &trace->opts.target, 2940 argv, false, NULL); 2941 if (err < 0) { 2942 fprintf(trace->output, "Couldn't run the workload!\n"); 2943 goto out_delete_evlist; 2944 } 2945 } 2946 2947 err = perf_evlist__open(evlist); 2948 if (err < 0) 2949 goto out_error_open; 2950 2951 err = bpf__apply_obj_config(); 2952 if (err) { 2953 char errbuf[BUFSIZ]; 2954 2955 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); 2956 pr_err("ERROR: Apply config to BPF failed: %s\n", 2957 errbuf); 2958 goto out_error_open; 2959 } 2960 2961 err = trace__set_filter_pids(trace); 2962 if (err < 0) 2963 goto out_error_mem; 2964 2965 if (trace->syscalls.map) 2966 trace__init_syscalls_bpf_map(trace); 2967 2968 if (trace->ev_qualifier_ids.nr > 0) { 2969 err = trace__set_ev_qualifier_filter(trace); 2970 if (err < 0) 2971 goto out_errno; 2972 2973 if (trace->syscalls.events.sys_exit) { 2974 pr_debug("event qualifier tracepoint filter: %s\n", 2975 trace->syscalls.events.sys_exit->filter); 2976 } 2977 } 2978 2979 err = perf_evlist__apply_filters(evlist, &evsel); 2980 if (err < 0) 2981 goto out_error_apply_filters; 2982 2983 err = perf_evlist__mmap(evlist, trace->opts.mmap_pages); 2984 if (err < 0) 2985 goto out_error_mmap; 2986 2987 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay) 2988 perf_evlist__enable(evlist); 2989 2990 if (forks) 2991 perf_evlist__start_workload(evlist); 2992 2993 if (trace->opts.initial_delay) { 2994 usleep(trace->opts.initial_delay * 1000); 2995 perf_evlist__enable(evlist); 2996 } 2997 2998 trace->multiple_threads = thread_map__pid(evlist->threads, 0) == -1 || 2999 evlist->threads->nr > 1 || 3000 perf_evlist__first(evlist)->attr.inherit; 3001 3002 /* 3003 * Now that we already used evsel->attr to ask the kernel to setup the 3004 * events, lets reuse evsel->attr.sample_max_stack as the limit in 3005 * trace__resolve_callchain(), allowing per-event max-stack settings 3006 * to override an explicitly set --max-stack global setting. 3007 */ 3008 evlist__for_each_entry(evlist, evsel) { 3009 if (evsel__has_callchain(evsel) && 3010 evsel->attr.sample_max_stack == 0) 3011 evsel->attr.sample_max_stack = trace->max_stack; 3012 } 3013 again: 3014 before = trace->nr_events; 3015 3016 for (i = 0; i < evlist->nr_mmaps; i++) { 3017 union perf_event *event; 3018 struct perf_mmap *md; 3019 3020 md = &evlist->mmap[i]; 3021 if (perf_mmap__read_init(md) < 0) 3022 continue; 3023 3024 while ((event = perf_mmap__read_event(md)) != NULL) { 3025 ++trace->nr_events; 3026 3027 err = trace__deliver_event(trace, event); 3028 if (err) 3029 goto out_disable; 3030 3031 perf_mmap__consume(md); 3032 3033 if (interrupted) 3034 goto out_disable; 3035 3036 if (done && !draining) { 3037 perf_evlist__disable(evlist); 3038 draining = true; 3039 } 3040 } 3041 perf_mmap__read_done(md); 3042 } 3043 3044 if (trace->nr_events == before) { 3045 int timeout = done ? 100 : -1; 3046 3047 if (!draining && perf_evlist__poll(evlist, timeout) > 0) { 3048 if (perf_evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0) 3049 draining = true; 3050 3051 goto again; 3052 } else { 3053 if (trace__flush_events(trace)) 3054 goto out_disable; 3055 } 3056 } else { 3057 goto again; 3058 } 3059 3060 out_disable: 3061 thread__zput(trace->current); 3062 3063 perf_evlist__disable(evlist); 3064 3065 if (trace->sort_events) 3066 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL); 3067 3068 if (!err) { 3069 if (trace->summary) 3070 trace__fprintf_thread_summary(trace, trace->output); 3071 3072 if (trace->show_tool_stats) { 3073 fprintf(trace->output, "Stats:\n " 3074 " vfs_getname : %" PRIu64 "\n" 3075 " proc_getname: %" PRIu64 "\n", 3076 trace->stats.vfs_getname, 3077 trace->stats.proc_getname); 3078 } 3079 } 3080 3081 out_delete_evlist: 3082 trace__symbols__exit(trace); 3083 3084 perf_evlist__delete(evlist); 3085 cgroup__put(trace->cgroup); 3086 trace->evlist = NULL; 3087 trace->live = false; 3088 return err; 3089 { 3090 char errbuf[BUFSIZ]; 3091 3092 out_error_sched_stat_runtime: 3093 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime"); 3094 goto out_error; 3095 3096 out_error_raw_syscalls: 3097 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)"); 3098 goto out_error; 3099 3100 out_error_mmap: 3101 perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf)); 3102 goto out_error; 3103 3104 out_error_open: 3105 perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf)); 3106 3107 out_error: 3108 fprintf(trace->output, "%s\n", errbuf); 3109 goto out_delete_evlist; 3110 3111 out_error_apply_filters: 3112 fprintf(trace->output, 3113 "Failed to set filter \"%s\" on event %s with %d (%s)\n", 3114 evsel->filter, perf_evsel__name(evsel), errno, 3115 str_error_r(errno, errbuf, sizeof(errbuf))); 3116 goto out_delete_evlist; 3117 } 3118 out_error_mem: 3119 fprintf(trace->output, "Not enough memory to run!\n"); 3120 goto out_delete_evlist; 3121 3122 out_errno: 3123 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno)); 3124 goto out_delete_evlist; 3125 } 3126 3127 static int trace__replay(struct trace *trace) 3128 { 3129 const struct perf_evsel_str_handler handlers[] = { 3130 { "probe:vfs_getname", trace__vfs_getname, }, 3131 }; 3132 struct perf_data data = { 3133 .file = { 3134 .path = input_name, 3135 }, 3136 .mode = PERF_DATA_MODE_READ, 3137 .force = trace->force, 3138 }; 3139 struct perf_session *session; 3140 struct perf_evsel *evsel; 3141 int err = -1; 3142 3143 trace->tool.sample = trace__process_sample; 3144 trace->tool.mmap = perf_event__process_mmap; 3145 trace->tool.mmap2 = perf_event__process_mmap2; 3146 trace->tool.comm = perf_event__process_comm; 3147 trace->tool.exit = perf_event__process_exit; 3148 trace->tool.fork = perf_event__process_fork; 3149 trace->tool.attr = perf_event__process_attr; 3150 trace->tool.tracing_data = perf_event__process_tracing_data; 3151 trace->tool.build_id = perf_event__process_build_id; 3152 trace->tool.namespaces = perf_event__process_namespaces; 3153 3154 trace->tool.ordered_events = true; 3155 trace->tool.ordering_requires_timestamps = true; 3156 3157 /* add tid to output */ 3158 trace->multiple_threads = true; 3159 3160 session = perf_session__new(&data, false, &trace->tool); 3161 if (session == NULL) 3162 return -1; 3163 3164 if (trace->opts.target.pid) 3165 symbol_conf.pid_list_str = strdup(trace->opts.target.pid); 3166 3167 if (trace->opts.target.tid) 3168 symbol_conf.tid_list_str = strdup(trace->opts.target.tid); 3169 3170 if (symbol__init(&session->header.env) < 0) 3171 goto out; 3172 3173 trace->host = &session->machines.host; 3174 3175 err = perf_session__set_tracepoints_handlers(session, handlers); 3176 if (err) 3177 goto out; 3178 3179 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3180 "raw_syscalls:sys_enter"); 3181 /* older kernels have syscalls tp versus raw_syscalls */ 3182 if (evsel == NULL) 3183 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3184 "syscalls:sys_enter"); 3185 3186 if (evsel && 3187 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 || 3188 perf_evsel__init_sc_tp_ptr_field(evsel, args))) { 3189 pr_err("Error during initialize raw_syscalls:sys_enter event\n"); 3190 goto out; 3191 } 3192 3193 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3194 "raw_syscalls:sys_exit"); 3195 if (evsel == NULL) 3196 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3197 "syscalls:sys_exit"); 3198 if (evsel && 3199 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 || 3200 perf_evsel__init_sc_tp_uint_field(evsel, ret))) { 3201 pr_err("Error during initialize raw_syscalls:sys_exit event\n"); 3202 goto out; 3203 } 3204 3205 evlist__for_each_entry(session->evlist, evsel) { 3206 if (evsel->attr.type == PERF_TYPE_SOFTWARE && 3207 (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ || 3208 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN || 3209 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS)) 3210 evsel->handler = trace__pgfault; 3211 } 3212 3213 setup_pager(); 3214 3215 err = perf_session__process_events(session); 3216 if (err) 3217 pr_err("Failed to process events, error %d", err); 3218 3219 else if (trace->summary) 3220 trace__fprintf_thread_summary(trace, trace->output); 3221 3222 out: 3223 perf_session__delete(session); 3224 3225 return err; 3226 } 3227 3228 static size_t trace__fprintf_threads_header(FILE *fp) 3229 { 3230 size_t printed; 3231 3232 printed = fprintf(fp, "\n Summary of events:\n\n"); 3233 3234 return printed; 3235 } 3236 3237 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs, 3238 struct stats *stats; 3239 double msecs; 3240 int syscall; 3241 ) 3242 { 3243 struct int_node *source = rb_entry(nd, struct int_node, rb_node); 3244 struct stats *stats = source->priv; 3245 3246 entry->syscall = source->i; 3247 entry->stats = stats; 3248 entry->msecs = stats ? (u64)stats->n * (avg_stats(stats) / NSEC_PER_MSEC) : 0; 3249 } 3250 3251 static size_t thread__dump_stats(struct thread_trace *ttrace, 3252 struct trace *trace, FILE *fp) 3253 { 3254 size_t printed = 0; 3255 struct syscall *sc; 3256 struct rb_node *nd; 3257 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats); 3258 3259 if (syscall_stats == NULL) 3260 return 0; 3261 3262 printed += fprintf(fp, "\n"); 3263 3264 printed += fprintf(fp, " syscall calls total min avg max stddev\n"); 3265 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n"); 3266 printed += fprintf(fp, " --------------- -------- --------- --------- --------- --------- ------\n"); 3267 3268 resort_rb__for_each_entry(nd, syscall_stats) { 3269 struct stats *stats = syscall_stats_entry->stats; 3270 if (stats) { 3271 double min = (double)(stats->min) / NSEC_PER_MSEC; 3272 double max = (double)(stats->max) / NSEC_PER_MSEC; 3273 double avg = avg_stats(stats); 3274 double pct; 3275 u64 n = (u64) stats->n; 3276 3277 pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0; 3278 avg /= NSEC_PER_MSEC; 3279 3280 sc = &trace->syscalls.table[syscall_stats_entry->syscall]; 3281 printed += fprintf(fp, " %-15s", sc->name); 3282 printed += fprintf(fp, " %8" PRIu64 " %9.3f %9.3f %9.3f", 3283 n, syscall_stats_entry->msecs, min, avg); 3284 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct); 3285 } 3286 } 3287 3288 resort_rb__delete(syscall_stats); 3289 printed += fprintf(fp, "\n\n"); 3290 3291 return printed; 3292 } 3293 3294 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace) 3295 { 3296 size_t printed = 0; 3297 struct thread_trace *ttrace = thread__priv(thread); 3298 double ratio; 3299 3300 if (ttrace == NULL) 3301 return 0; 3302 3303 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0; 3304 3305 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid); 3306 printed += fprintf(fp, "%lu events, ", ttrace->nr_events); 3307 printed += fprintf(fp, "%.1f%%", ratio); 3308 if (ttrace->pfmaj) 3309 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj); 3310 if (ttrace->pfmin) 3311 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin); 3312 if (trace->sched) 3313 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms); 3314 else if (fputc('\n', fp) != EOF) 3315 ++printed; 3316 3317 printed += thread__dump_stats(ttrace, trace, fp); 3318 3319 return printed; 3320 } 3321 3322 static unsigned long thread__nr_events(struct thread_trace *ttrace) 3323 { 3324 return ttrace ? ttrace->nr_events : 0; 3325 } 3326 3327 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)), 3328 struct thread *thread; 3329 ) 3330 { 3331 entry->thread = rb_entry(nd, struct thread, rb_node); 3332 } 3333 3334 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp) 3335 { 3336 size_t printed = trace__fprintf_threads_header(fp); 3337 struct rb_node *nd; 3338 int i; 3339 3340 for (i = 0; i < THREADS__TABLE_SIZE; i++) { 3341 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i); 3342 3343 if (threads == NULL) { 3344 fprintf(fp, "%s", "Error sorting output by nr_events!\n"); 3345 return 0; 3346 } 3347 3348 resort_rb__for_each_entry(nd, threads) 3349 printed += trace__fprintf_thread(fp, threads_entry->thread, trace); 3350 3351 resort_rb__delete(threads); 3352 } 3353 return printed; 3354 } 3355 3356 static int trace__set_duration(const struct option *opt, const char *str, 3357 int unset __maybe_unused) 3358 { 3359 struct trace *trace = opt->value; 3360 3361 trace->duration_filter = atof(str); 3362 return 0; 3363 } 3364 3365 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str, 3366 int unset __maybe_unused) 3367 { 3368 int ret = -1; 3369 size_t i; 3370 struct trace *trace = opt->value; 3371 /* 3372 * FIXME: introduce a intarray class, plain parse csv and create a 3373 * { int nr, int entries[] } struct... 3374 */ 3375 struct intlist *list = intlist__new(str); 3376 3377 if (list == NULL) 3378 return -1; 3379 3380 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1; 3381 trace->filter_pids.entries = calloc(i, sizeof(pid_t)); 3382 3383 if (trace->filter_pids.entries == NULL) 3384 goto out; 3385 3386 trace->filter_pids.entries[0] = getpid(); 3387 3388 for (i = 1; i < trace->filter_pids.nr; ++i) 3389 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i; 3390 3391 intlist__delete(list); 3392 ret = 0; 3393 out: 3394 return ret; 3395 } 3396 3397 static int trace__open_output(struct trace *trace, const char *filename) 3398 { 3399 struct stat st; 3400 3401 if (!stat(filename, &st) && st.st_size) { 3402 char oldname[PATH_MAX]; 3403 3404 scnprintf(oldname, sizeof(oldname), "%s.old", filename); 3405 unlink(oldname); 3406 rename(filename, oldname); 3407 } 3408 3409 trace->output = fopen(filename, "w"); 3410 3411 return trace->output == NULL ? -errno : 0; 3412 } 3413 3414 static int parse_pagefaults(const struct option *opt, const char *str, 3415 int unset __maybe_unused) 3416 { 3417 int *trace_pgfaults = opt->value; 3418 3419 if (strcmp(str, "all") == 0) 3420 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN; 3421 else if (strcmp(str, "maj") == 0) 3422 *trace_pgfaults |= TRACE_PFMAJ; 3423 else if (strcmp(str, "min") == 0) 3424 *trace_pgfaults |= TRACE_PFMIN; 3425 else 3426 return -1; 3427 3428 return 0; 3429 } 3430 3431 static void evlist__set_evsel_handler(struct perf_evlist *evlist, void *handler) 3432 { 3433 struct perf_evsel *evsel; 3434 3435 evlist__for_each_entry(evlist, evsel) 3436 evsel->handler = handler; 3437 } 3438 3439 static int evlist__set_syscall_tp_fields(struct perf_evlist *evlist) 3440 { 3441 struct perf_evsel *evsel; 3442 3443 evlist__for_each_entry(evlist, evsel) { 3444 if (evsel->priv || !evsel->tp_format) 3445 continue; 3446 3447 if (strcmp(evsel->tp_format->system, "syscalls")) 3448 continue; 3449 3450 if (perf_evsel__init_syscall_tp(evsel)) 3451 return -1; 3452 3453 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) { 3454 struct syscall_tp *sc = evsel->priv; 3455 3456 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64))) 3457 return -1; 3458 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) { 3459 struct syscall_tp *sc = evsel->priv; 3460 3461 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap)) 3462 return -1; 3463 } 3464 } 3465 3466 return 0; 3467 } 3468 3469 /* 3470 * XXX: Hackish, just splitting the combined -e+--event (syscalls 3471 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use 3472 * existing facilities unchanged (trace->ev_qualifier + parse_options()). 3473 * 3474 * It'd be better to introduce a parse_options() variant that would return a 3475 * list with the terms it didn't match to an event... 3476 */ 3477 static int trace__parse_events_option(const struct option *opt, const char *str, 3478 int unset __maybe_unused) 3479 { 3480 struct trace *trace = (struct trace *)opt->value; 3481 const char *s = str; 3482 char *sep = NULL, *lists[2] = { NULL, NULL, }; 3483 int len = strlen(str) + 1, err = -1, list, idx; 3484 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR); 3485 char group_name[PATH_MAX]; 3486 struct syscall_fmt *fmt; 3487 3488 if (strace_groups_dir == NULL) 3489 return -1; 3490 3491 if (*s == '!') { 3492 ++s; 3493 trace->not_ev_qualifier = true; 3494 } 3495 3496 while (1) { 3497 if ((sep = strchr(s, ',')) != NULL) 3498 *sep = '\0'; 3499 3500 list = 0; 3501 if (syscalltbl__id(trace->sctbl, s) >= 0 || 3502 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) { 3503 list = 1; 3504 goto do_concat; 3505 } 3506 3507 fmt = syscall_fmt__find_by_alias(s); 3508 if (fmt != NULL) { 3509 list = 1; 3510 s = fmt->name; 3511 } else { 3512 path__join(group_name, sizeof(group_name), strace_groups_dir, s); 3513 if (access(group_name, R_OK) == 0) 3514 list = 1; 3515 } 3516 do_concat: 3517 if (lists[list]) { 3518 sprintf(lists[list] + strlen(lists[list]), ",%s", s); 3519 } else { 3520 lists[list] = malloc(len); 3521 if (lists[list] == NULL) 3522 goto out; 3523 strcpy(lists[list], s); 3524 } 3525 3526 if (!sep) 3527 break; 3528 3529 *sep = ','; 3530 s = sep + 1; 3531 } 3532 3533 if (lists[1] != NULL) { 3534 struct strlist_config slist_config = { 3535 .dirname = strace_groups_dir, 3536 }; 3537 3538 trace->ev_qualifier = strlist__new(lists[1], &slist_config); 3539 if (trace->ev_qualifier == NULL) { 3540 fputs("Not enough memory to parse event qualifier", trace->output); 3541 goto out; 3542 } 3543 3544 if (trace__validate_ev_qualifier(trace)) 3545 goto out; 3546 trace->trace_syscalls = true; 3547 } 3548 3549 err = 0; 3550 3551 if (lists[0]) { 3552 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event", 3553 "event selector. use 'perf list' to list available events", 3554 parse_events_option); 3555 err = parse_events_option(&o, lists[0], 0); 3556 } 3557 out: 3558 if (sep) 3559 *sep = ','; 3560 3561 return err; 3562 } 3563 3564 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset) 3565 { 3566 struct trace *trace = opt->value; 3567 3568 if (!list_empty(&trace->evlist->entries)) 3569 return parse_cgroups(opt, str, unset); 3570 3571 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str); 3572 3573 return 0; 3574 } 3575 3576 static struct bpf_map *bpf__find_map_by_name(const char *name) 3577 { 3578 struct bpf_object *obj, *tmp; 3579 3580 bpf_object__for_each_safe(obj, tmp) { 3581 struct bpf_map *map = bpf_object__find_map_by_name(obj, name); 3582 if (map) 3583 return map; 3584 3585 } 3586 3587 return NULL; 3588 } 3589 3590 static void trace__set_bpf_map_filtered_pids(struct trace *trace) 3591 { 3592 trace->filter_pids.map = bpf__find_map_by_name("pids_filtered"); 3593 } 3594 3595 static void trace__set_bpf_map_syscalls(struct trace *trace) 3596 { 3597 trace->syscalls.map = bpf__find_map_by_name("syscalls"); 3598 } 3599 3600 static int trace__config(const char *var, const char *value, void *arg) 3601 { 3602 struct trace *trace = arg; 3603 int err = 0; 3604 3605 if (!strcmp(var, "trace.add_events")) { 3606 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event", 3607 "event selector. use 'perf list' to list available events", 3608 parse_events_option); 3609 err = parse_events_option(&o, value, 0); 3610 } else if (!strcmp(var, "trace.show_timestamp")) { 3611 trace->show_tstamp = perf_config_bool(var, value); 3612 } else if (!strcmp(var, "trace.show_duration")) { 3613 trace->show_duration = perf_config_bool(var, value); 3614 } else if (!strcmp(var, "trace.show_arg_names")) { 3615 trace->show_arg_names = perf_config_bool(var, value); 3616 if (!trace->show_arg_names) 3617 trace->show_zeros = true; 3618 } else if (!strcmp(var, "trace.show_zeros")) { 3619 bool new_show_zeros = perf_config_bool(var, value); 3620 if (!trace->show_arg_names && !new_show_zeros) { 3621 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n"); 3622 goto out; 3623 } 3624 trace->show_zeros = new_show_zeros; 3625 } else if (!strcmp(var, "trace.show_prefix")) { 3626 trace->show_string_prefix = perf_config_bool(var, value); 3627 } else if (!strcmp(var, "trace.no_inherit")) { 3628 trace->opts.no_inherit = perf_config_bool(var, value); 3629 } else if (!strcmp(var, "trace.args_alignment")) { 3630 int args_alignment = 0; 3631 if (perf_config_int(&args_alignment, var, value) == 0) 3632 trace->args_alignment = args_alignment; 3633 } 3634 out: 3635 return err; 3636 } 3637 3638 int cmd_trace(int argc, const char **argv) 3639 { 3640 const char *trace_usage[] = { 3641 "perf trace [<options>] [<command>]", 3642 "perf trace [<options>] -- <command> [<options>]", 3643 "perf trace record [<options>] [<command>]", 3644 "perf trace record [<options>] -- <command> [<options>]", 3645 NULL 3646 }; 3647 struct trace trace = { 3648 .syscalls = { 3649 . max = -1, 3650 }, 3651 .opts = { 3652 .target = { 3653 .uid = UINT_MAX, 3654 .uses_mmap = true, 3655 }, 3656 .user_freq = UINT_MAX, 3657 .user_interval = ULLONG_MAX, 3658 .no_buffering = true, 3659 .mmap_pages = UINT_MAX, 3660 }, 3661 .output = stderr, 3662 .show_comm = true, 3663 .show_tstamp = true, 3664 .show_duration = true, 3665 .show_arg_names = true, 3666 .args_alignment = 70, 3667 .trace_syscalls = false, 3668 .kernel_syscallchains = false, 3669 .max_stack = UINT_MAX, 3670 .max_events = ULONG_MAX, 3671 }; 3672 const char *output_name = NULL; 3673 const struct option trace_options[] = { 3674 OPT_CALLBACK('e', "event", &trace, "event", 3675 "event/syscall selector. use 'perf list' to list available events", 3676 trace__parse_events_option), 3677 OPT_BOOLEAN(0, "comm", &trace.show_comm, 3678 "show the thread COMM next to its id"), 3679 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"), 3680 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace", 3681 trace__parse_events_option), 3682 OPT_STRING('o', "output", &output_name, "file", "output file name"), 3683 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"), 3684 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid", 3685 "trace events on existing process id"), 3686 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid", 3687 "trace events on existing thread id"), 3688 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids", 3689 "pids to filter (by the kernel)", trace__set_filter_pids_from_option), 3690 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide, 3691 "system-wide collection from all CPUs"), 3692 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu", 3693 "list of cpus to monitor"), 3694 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit, 3695 "child tasks do not inherit counters"), 3696 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages", 3697 "number of mmap data pages", 3698 perf_evlist__parse_mmap_pages), 3699 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user", 3700 "user to profile"), 3701 OPT_CALLBACK(0, "duration", &trace, "float", 3702 "show only events with duration > N.M ms", 3703 trace__set_duration), 3704 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"), 3705 OPT_INCR('v', "verbose", &verbose, "be more verbose"), 3706 OPT_BOOLEAN('T', "time", &trace.full_time, 3707 "Show full timestamp, not time relative to first start"), 3708 OPT_BOOLEAN(0, "failure", &trace.failure_only, 3709 "Show only syscalls that failed"), 3710 OPT_BOOLEAN('s', "summary", &trace.summary_only, 3711 "Show only syscall summary with statistics"), 3712 OPT_BOOLEAN('S', "with-summary", &trace.summary, 3713 "Show all syscalls and summary with statistics"), 3714 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min", 3715 "Trace pagefaults", parse_pagefaults, "maj"), 3716 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"), 3717 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"), 3718 OPT_CALLBACK(0, "call-graph", &trace.opts, 3719 "record_mode[,record_size]", record_callchain_help, 3720 &record_parse_callchain_opt), 3721 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains, 3722 "Show the kernel callchains on the syscall exit path"), 3723 OPT_ULONG(0, "max-events", &trace.max_events, 3724 "Set the maximum number of events to print, exit after that is reached. "), 3725 OPT_UINTEGER(0, "min-stack", &trace.min_stack, 3726 "Set the minimum stack depth when parsing the callchain, " 3727 "anything below the specified depth will be ignored."), 3728 OPT_UINTEGER(0, "max-stack", &trace.max_stack, 3729 "Set the maximum stack depth when parsing the callchain, " 3730 "anything beyond the specified depth will be ignored. " 3731 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)), 3732 OPT_BOOLEAN(0, "sort-events", &trace.sort_events, 3733 "Sort batch of events before processing, use if getting out of order events"), 3734 OPT_BOOLEAN(0, "print-sample", &trace.print_sample, 3735 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"), 3736 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, 3737 "per thread proc mmap processing timeout in ms"), 3738 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only", 3739 trace__parse_cgroups), 3740 OPT_UINTEGER('D', "delay", &trace.opts.initial_delay, 3741 "ms to wait before starting measurement after program " 3742 "start"), 3743 OPT_END() 3744 }; 3745 bool __maybe_unused max_stack_user_set = true; 3746 bool mmap_pages_user_set = true; 3747 struct perf_evsel *evsel; 3748 const char * const trace_subcommands[] = { "record", NULL }; 3749 int err = -1; 3750 char bf[BUFSIZ]; 3751 3752 signal(SIGSEGV, sighandler_dump_stack); 3753 signal(SIGFPE, sighandler_dump_stack); 3754 3755 trace.evlist = perf_evlist__new(); 3756 trace.sctbl = syscalltbl__new(); 3757 3758 if (trace.evlist == NULL || trace.sctbl == NULL) { 3759 pr_err("Not enough memory to run!\n"); 3760 err = -ENOMEM; 3761 goto out; 3762 } 3763 3764 err = perf_config(trace__config, &trace); 3765 if (err) 3766 goto out; 3767 3768 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands, 3769 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION); 3770 3771 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) { 3772 usage_with_options_msg(trace_usage, trace_options, 3773 "cgroup monitoring only available in system-wide mode"); 3774 } 3775 3776 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__"); 3777 if (IS_ERR(evsel)) { 3778 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf)); 3779 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf); 3780 goto out; 3781 } 3782 3783 if (evsel) { 3784 trace.syscalls.events.augmented = evsel; 3785 trace__set_bpf_map_filtered_pids(&trace); 3786 trace__set_bpf_map_syscalls(&trace); 3787 } 3788 3789 err = bpf__setup_stdout(trace.evlist); 3790 if (err) { 3791 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf)); 3792 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf); 3793 goto out; 3794 } 3795 3796 err = -1; 3797 3798 if (trace.trace_pgfaults) { 3799 trace.opts.sample_address = true; 3800 trace.opts.sample_time = true; 3801 } 3802 3803 if (trace.opts.mmap_pages == UINT_MAX) 3804 mmap_pages_user_set = false; 3805 3806 if (trace.max_stack == UINT_MAX) { 3807 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack(); 3808 max_stack_user_set = false; 3809 } 3810 3811 #ifdef HAVE_DWARF_UNWIND_SUPPORT 3812 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) { 3813 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false); 3814 } 3815 #endif 3816 3817 if (callchain_param.enabled) { 3818 if (!mmap_pages_user_set && geteuid() == 0) 3819 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4; 3820 3821 symbol_conf.use_callchain = true; 3822 } 3823 3824 if (trace.evlist->nr_entries > 0) { 3825 evlist__set_evsel_handler(trace.evlist, trace__event_handler); 3826 if (evlist__set_syscall_tp_fields(trace.evlist)) { 3827 perror("failed to set syscalls:* tracepoint fields"); 3828 goto out; 3829 } 3830 } 3831 3832 if (trace.sort_events) { 3833 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace); 3834 ordered_events__set_copy_on_queue(&trace.oe.data, true); 3835 } 3836 3837 /* 3838 * If we are augmenting syscalls, then combine what we put in the 3839 * __augmented_syscalls__ BPF map with what is in the 3840 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF, 3841 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit. 3842 * 3843 * We'll switch to look at two BPF maps, one for sys_enter and the 3844 * other for sys_exit when we start augmenting the sys_exit paths with 3845 * buffers that are being copied from kernel to userspace, think 'read' 3846 * syscall. 3847 */ 3848 if (trace.syscalls.events.augmented) { 3849 evlist__for_each_entry(trace.evlist, evsel) { 3850 bool raw_syscalls_sys_exit = strcmp(perf_evsel__name(evsel), "raw_syscalls:sys_exit") == 0; 3851 3852 if (raw_syscalls_sys_exit) { 3853 trace.raw_augmented_syscalls = true; 3854 goto init_augmented_syscall_tp; 3855 } 3856 3857 if (strcmp(perf_evsel__name(evsel), "raw_syscalls:sys_enter") == 0) { 3858 struct perf_evsel *augmented = trace.syscalls.events.augmented; 3859 if (perf_evsel__init_augmented_syscall_tp(augmented, evsel) || 3860 perf_evsel__init_augmented_syscall_tp_args(augmented)) 3861 goto out; 3862 augmented->handler = trace__sys_enter; 3863 } 3864 3865 if (strstarts(perf_evsel__name(evsel), "syscalls:sys_exit_")) { 3866 struct syscall_tp *sc; 3867 init_augmented_syscall_tp: 3868 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel)) 3869 goto out; 3870 sc = evsel->priv; 3871 /* 3872 * For now with BPF raw_augmented we hook into 3873 * raw_syscalls:sys_enter and there we get all 3874 * 6 syscall args plus the tracepoint common 3875 * fields and the syscall_nr (another long). 3876 * So we check if that is the case and if so 3877 * don't look after the sc->args_size but 3878 * always after the full raw_syscalls:sys_enter 3879 * payload, which is fixed. 3880 * 3881 * We'll revisit this later to pass 3882 * s->args_size to the BPF augmenter (now 3883 * tools/perf/examples/bpf/augmented_raw_syscalls.c, 3884 * so that it copies only what we need for each 3885 * syscall, like what happens when we use 3886 * syscalls:sys_enter_NAME, so that we reduce 3887 * the kernel/userspace traffic to just what is 3888 * needed for each syscall. 3889 */ 3890 if (trace.raw_augmented_syscalls) 3891 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset; 3892 perf_evsel__init_augmented_syscall_tp_ret(evsel); 3893 evsel->handler = trace__sys_exit; 3894 } 3895 } 3896 } 3897 3898 if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) 3899 return trace__record(&trace, argc-1, &argv[1]); 3900 3901 /* summary_only implies summary option, but don't overwrite summary if set */ 3902 if (trace.summary_only) 3903 trace.summary = trace.summary_only; 3904 3905 if (!trace.trace_syscalls && !trace.trace_pgfaults && 3906 trace.evlist->nr_entries == 0 /* Was --events used? */) { 3907 trace.trace_syscalls = true; 3908 } 3909 3910 if (output_name != NULL) { 3911 err = trace__open_output(&trace, output_name); 3912 if (err < 0) { 3913 perror("failed to create output file"); 3914 goto out; 3915 } 3916 } 3917 3918 err = target__validate(&trace.opts.target); 3919 if (err) { 3920 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 3921 fprintf(trace.output, "%s", bf); 3922 goto out_close; 3923 } 3924 3925 err = target__parse_uid(&trace.opts.target); 3926 if (err) { 3927 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 3928 fprintf(trace.output, "%s", bf); 3929 goto out_close; 3930 } 3931 3932 if (!argc && target__none(&trace.opts.target)) 3933 trace.opts.target.system_wide = true; 3934 3935 if (input_name) 3936 err = trace__replay(&trace); 3937 else 3938 err = trace__run(&trace, argc, argv); 3939 3940 out_close: 3941 if (output_name != NULL) 3942 fclose(trace.output); 3943 out: 3944 return err; 3945 } 3946