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