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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 "builtin.h"
22#include "util/cgroup.h"
23#include "util/color.h"
24#include "util/debug.h"
25#include "util/env.h"
26#include "util/event.h"
27#include "util/evlist.h"
28#include <subcmd/exec-cmd.h>
29#include "util/machine.h"
30#include "util/path.h"
31#include "util/session.h"
32#include "util/thread.h"
33#include <subcmd/parse-options.h>
34#include "util/strlist.h"
35#include "util/intlist.h"
36#include "util/thread_map.h"
37#include "util/stat.h"
38#include "trace/beauty/beauty.h"
39#include "trace-event.h"
40#include "util/parse-events.h"
41#include "util/bpf-loader.h"
42#include "callchain.h"
43#include "print_binary.h"
44#include "string2.h"
45#include "syscalltbl.h"
46#include "rb_resort.h"
47
48#include <errno.h>
49#include <inttypes.h>
50#include <poll.h>
51#include <signal.h>
52#include <stdlib.h>
53#include <string.h>
54#include <linux/err.h>
55#include <linux/filter.h>
56#include <linux/kernel.h>
57#include <linux/random.h>
58#include <linux/stringify.h>
59#include <linux/time64.h>
60#include <fcntl.h>
61
62#include "sane_ctype.h"
63
64#ifndef O_CLOEXEC
65# define O_CLOEXEC 02000000
66#endif
67
68#ifndef F_LINUX_SPECIFIC_BASE
69# define F_LINUX_SPECIFIC_BASE 1024
70#endif
71
72struct trace {
73 struct perf_tool tool;
74 struct syscalltbl *sctbl;
75 struct {
76 int max;
77 struct syscall *table;
78 struct {
79 struct perf_evsel *sys_enter,
80 *sys_exit;
81 } events;
82 } syscalls;
83 struct record_opts opts;
84 struct perf_evlist *evlist;
85 struct machine *host;
86 struct thread *current;
87 struct cgroup *cgroup;
88 u64 base_time;
89 FILE *output;
90 unsigned long nr_events;
91 struct strlist *ev_qualifier;
92 struct {
93 size_t nr;
94 int *entries;
95 } ev_qualifier_ids;
96 struct {
97 size_t nr;
98 pid_t *entries;
99 } filter_pids;
100 double duration_filter;
101 double runtime_ms;
102 struct {
103 u64 vfs_getname,
104 proc_getname;
105 } stats;
106 unsigned int max_stack;
107 unsigned int min_stack;
108 bool not_ev_qualifier;
109 bool live;
110 bool full_time;
111 bool sched;
112 bool multiple_threads;
113 bool summary;
114 bool summary_only;
115 bool failure_only;
116 bool show_comm;
117 bool print_sample;
118 bool show_tool_stats;
119 bool trace_syscalls;
120 bool kernel_syscallchains;
121 bool force;
122 bool vfs_getname;
123 int trace_pgfaults;
124 int open_id;
125};
126
127struct tp_field {
128 int offset;
129 union {
130 u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
131 void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
132 };
133};
134
135#define TP_UINT_FIELD(bits) \
136static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
137{ \
138 u##bits value; \
139 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
140 return value; \
141}
142
143TP_UINT_FIELD(8);
144TP_UINT_FIELD(16);
145TP_UINT_FIELD(32);
146TP_UINT_FIELD(64);
147
148#define TP_UINT_FIELD__SWAPPED(bits) \
149static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
150{ \
151 u##bits value; \
152 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
153 return bswap_##bits(value);\
154}
155
156TP_UINT_FIELD__SWAPPED(16);
157TP_UINT_FIELD__SWAPPED(32);
158TP_UINT_FIELD__SWAPPED(64);
159
160static int tp_field__init_uint(struct tp_field *field,
161 struct format_field *format_field,
162 bool needs_swap)
163{
164 field->offset = format_field->offset;
165
166 switch (format_field->size) {
167 case 1:
168 field->integer = tp_field__u8;
169 break;
170 case 2:
171 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
172 break;
173 case 4:
174 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
175 break;
176 case 8:
177 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
178 break;
179 default:
180 return -1;
181 }
182
183 return 0;
184}
185
186static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
187{
188 return sample->raw_data + field->offset;
189}
190
191static int tp_field__init_ptr(struct tp_field *field, struct format_field *format_field)
192{
193 field->offset = format_field->offset;
194 field->pointer = tp_field__ptr;
195 return 0;
196}
197
198struct syscall_tp {
199 struct tp_field id;
200 union {
201 struct tp_field args, ret;
202 };
203};
204
205static int perf_evsel__init_tp_uint_field(struct perf_evsel *evsel,
206 struct tp_field *field,
207 const char *name)
208{
209 struct format_field *format_field = perf_evsel__field(evsel, name);
210
211 if (format_field == NULL)
212 return -1;
213
214 return tp_field__init_uint(field, format_field, evsel->needs_swap);
215}
216
217#define perf_evsel__init_sc_tp_uint_field(evsel, name) \
218 ({ struct syscall_tp *sc = evsel->priv;\
219 perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); })
220
221static int perf_evsel__init_tp_ptr_field(struct perf_evsel *evsel,
222 struct tp_field *field,
223 const char *name)
224{
225 struct format_field *format_field = perf_evsel__field(evsel, name);
226
227 if (format_field == NULL)
228 return -1;
229
230 return tp_field__init_ptr(field, format_field);
231}
232
233#define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
234 ({ struct syscall_tp *sc = evsel->priv;\
235 perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
236
237static void perf_evsel__delete_priv(struct perf_evsel *evsel)
238{
239 zfree(&evsel->priv);
240 perf_evsel__delete(evsel);
241}
242
243static int perf_evsel__init_syscall_tp(struct perf_evsel *evsel, void *handler)
244{
245 evsel->priv = malloc(sizeof(struct syscall_tp));
246 if (evsel->priv != NULL) {
247 if (perf_evsel__init_sc_tp_uint_field(evsel, id))
248 goto out_delete;
249
250 evsel->handler = handler;
251 return 0;
252 }
253
254 return -ENOMEM;
255
256out_delete:
257 zfree(&evsel->priv);
258 return -ENOENT;
259}
260
261static struct perf_evsel *perf_evsel__syscall_newtp(const char *direction, void *handler)
262{
263 struct perf_evsel *evsel = perf_evsel__newtp("raw_syscalls", direction);
264
265 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
266 if (IS_ERR(evsel))
267 evsel = perf_evsel__newtp("syscalls", direction);
268
269 if (IS_ERR(evsel))
270 return NULL;
271
272 if (perf_evsel__init_syscall_tp(evsel, handler))
273 goto out_delete;
274
275 return evsel;
276
277out_delete:
278 perf_evsel__delete_priv(evsel);
279 return NULL;
280}
281
282#define perf_evsel__sc_tp_uint(evsel, name, sample) \
283 ({ struct syscall_tp *fields = evsel->priv; \
284 fields->name.integer(&fields->name, sample); })
285
286#define perf_evsel__sc_tp_ptr(evsel, name, sample) \
287 ({ struct syscall_tp *fields = evsel->priv; \
288 fields->name.pointer(&fields->name, sample); })
289
290size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, int val)
291{
292 int idx = val - sa->offset;
293
294 if (idx < 0 || idx >= sa->nr_entries)
295 return scnprintf(bf, size, intfmt, val);
296
297 return scnprintf(bf, size, "%s", sa->entries[idx]);
298}
299
300static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
301 const char *intfmt,
302 struct syscall_arg *arg)
303{
304 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->val);
305}
306
307static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
308 struct syscall_arg *arg)
309{
310 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
311}
312
313#define SCA_STRARRAY syscall_arg__scnprintf_strarray
314
315struct strarrays {
316 int nr_entries;
317 struct strarray **entries;
318};
319
320#define DEFINE_STRARRAYS(array) struct strarrays strarrays__##array = { \
321 .nr_entries = ARRAY_SIZE(array), \
322 .entries = array, \
323}
324
325size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
326 struct syscall_arg *arg)
327{
328 struct strarrays *sas = arg->parm;
329 int i;
330
331 for (i = 0; i < sas->nr_entries; ++i) {
332 struct strarray *sa = sas->entries[i];
333 int idx = arg->val - sa->offset;
334
335 if (idx >= 0 && idx < sa->nr_entries) {
336 if (sa->entries[idx] == NULL)
337 break;
338 return scnprintf(bf, size, "%s", sa->entries[idx]);
339 }
340 }
341
342 return scnprintf(bf, size, "%d", arg->val);
343}
344
345#ifndef AT_FDCWD
346#define AT_FDCWD -100
347#endif
348
349static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
350 struct syscall_arg *arg)
351{
352 int fd = arg->val;
353
354 if (fd == AT_FDCWD)
355 return scnprintf(bf, size, "CWD");
356
357 return syscall_arg__scnprintf_fd(bf, size, arg);
358}
359
360#define SCA_FDAT syscall_arg__scnprintf_fd_at
361
362static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
363 struct syscall_arg *arg);
364
365#define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
366
367size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
368{
369 return scnprintf(bf, size, "%#lx", arg->val);
370}
371
372size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
373{
374 return scnprintf(bf, size, "%d", arg->val);
375}
376
377size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
378{
379 return scnprintf(bf, size, "%ld", arg->val);
380}
381
382static const char *bpf_cmd[] = {
383 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
384 "MAP_GET_NEXT_KEY", "PROG_LOAD",
385};
386static DEFINE_STRARRAY(bpf_cmd);
387
388static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
389static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, 1);
390
391static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
392static DEFINE_STRARRAY(itimers);
393
394static const char *keyctl_options[] = {
395 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
396 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
397 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
398 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
399 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
400};
401static DEFINE_STRARRAY(keyctl_options);
402
403static const char *whences[] = { "SET", "CUR", "END",
404#ifdef SEEK_DATA
405"DATA",
406#endif
407#ifdef SEEK_HOLE
408"HOLE",
409#endif
410};
411static DEFINE_STRARRAY(whences);
412
413static const char *fcntl_cmds[] = {
414 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
415 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
416 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
417 "GETOWNER_UIDS",
418};
419static DEFINE_STRARRAY(fcntl_cmds);
420
421static const char *fcntl_linux_specific_cmds[] = {
422 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
423 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
424 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
425};
426
427static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, F_LINUX_SPECIFIC_BASE);
428
429static struct strarray *fcntl_cmds_arrays[] = {
430 &strarray__fcntl_cmds,
431 &strarray__fcntl_linux_specific_cmds,
432};
433
434static DEFINE_STRARRAYS(fcntl_cmds_arrays);
435
436static const char *rlimit_resources[] = {
437 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
438 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
439 "RTTIME",
440};
441static DEFINE_STRARRAY(rlimit_resources);
442
443static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
444static DEFINE_STRARRAY(sighow);
445
446static const char *clockid[] = {
447 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
448 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
449 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
450};
451static DEFINE_STRARRAY(clockid);
452
453static const char *socket_families[] = {
454 "UNSPEC", "LOCAL", "INET", "AX25", "IPX", "APPLETALK", "NETROM",
455 "BRIDGE", "ATMPVC", "X25", "INET6", "ROSE", "DECnet", "NETBEUI",
456 "SECURITY", "KEY", "NETLINK", "PACKET", "ASH", "ECONET", "ATMSVC",
457 "RDS", "SNA", "IRDA", "PPPOX", "WANPIPE", "LLC", "IB", "CAN", "TIPC",
458 "BLUETOOTH", "IUCV", "RXRPC", "ISDN", "PHONET", "IEEE802154", "CAIF",
459 "ALG", "NFC", "VSOCK",
460};
461static DEFINE_STRARRAY(socket_families);
462
463static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
464 struct syscall_arg *arg)
465{
466 size_t printed = 0;
467 int mode = arg->val;
468
469 if (mode == F_OK) /* 0 */
470 return scnprintf(bf, size, "F");
471#define P_MODE(n) \
472 if (mode & n##_OK) { \
473 printed += scnprintf(bf + printed, size - printed, "%s", #n); \
474 mode &= ~n##_OK; \
475 }
476
477 P_MODE(R);
478 P_MODE(W);
479 P_MODE(X);
480#undef P_MODE
481
482 if (mode)
483 printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
484
485 return printed;
486}
487
488#define SCA_ACCMODE syscall_arg__scnprintf_access_mode
489
490static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
491 struct syscall_arg *arg);
492
493#define SCA_FILENAME syscall_arg__scnprintf_filename
494
495static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
496 struct syscall_arg *arg)
497{
498 int printed = 0, flags = arg->val;
499
500#define P_FLAG(n) \
501 if (flags & O_##n) { \
502 printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
503 flags &= ~O_##n; \
504 }
505
506 P_FLAG(CLOEXEC);
507 P_FLAG(NONBLOCK);
508#undef P_FLAG
509
510 if (flags)
511 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
512
513 return printed;
514}
515
516#define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
517
518#ifndef GRND_NONBLOCK
519#define GRND_NONBLOCK 0x0001
520#endif
521#ifndef GRND_RANDOM
522#define GRND_RANDOM 0x0002
523#endif
524
525static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
526 struct syscall_arg *arg)
527{
528 int printed = 0, flags = arg->val;
529
530#define P_FLAG(n) \
531 if (flags & GRND_##n) { \
532 printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
533 flags &= ~GRND_##n; \
534 }
535
536 P_FLAG(RANDOM);
537 P_FLAG(NONBLOCK);
538#undef P_FLAG
539
540 if (flags)
541 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
542
543 return printed;
544}
545
546#define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
547
548#define STRARRAY(name, array) \
549 { .scnprintf = SCA_STRARRAY, \
550 .parm = &strarray__##array, }
551
552#include "trace/beauty/arch_errno_names.c"
553#include "trace/beauty/eventfd.c"
554#include "trace/beauty/futex_op.c"
555#include "trace/beauty/futex_val3.c"
556#include "trace/beauty/mmap.c"
557#include "trace/beauty/mode_t.c"
558#include "trace/beauty/msg_flags.c"
559#include "trace/beauty/open_flags.c"
560#include "trace/beauty/perf_event_open.c"
561#include "trace/beauty/pid.c"
562#include "trace/beauty/sched_policy.c"
563#include "trace/beauty/seccomp.c"
564#include "trace/beauty/signum.c"
565#include "trace/beauty/socket_type.c"
566#include "trace/beauty/waitid_options.c"
567
568struct syscall_arg_fmt {
569 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
570 void *parm;
571 const char *name;
572 bool show_zero;
573};
574
575static struct syscall_fmt {
576 const char *name;
577 const char *alias;
578 struct syscall_arg_fmt arg[6];
579 u8 nr_args;
580 bool errpid;
581 bool timeout;
582 bool hexret;
583} syscall_fmts[] = {
584 { .name = "access",
585 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
586 { .name = "bpf",
587 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
588 { .name = "brk", .hexret = true,
589 .arg = { [0] = { .scnprintf = SCA_HEX, /* brk */ }, }, },
590 { .name = "clock_gettime",
591 .arg = { [0] = STRARRAY(clk_id, clockid), }, },
592 { .name = "clone", .errpid = true, .nr_args = 5,
593 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, },
594 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, },
595 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
596 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, },
597 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, },
598 { .name = "close",
599 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
600 { .name = "epoll_ctl",
601 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
602 { .name = "eventfd2",
603 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
604 { .name = "fchmodat",
605 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
606 { .name = "fchownat",
607 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
608 { .name = "fcntl",
609 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
610 .parm = &strarrays__fcntl_cmds_arrays,
611 .show_zero = true, },
612 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, },
613 { .name = "flock",
614 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
615 { .name = "fstat", .alias = "newfstat", },
616 { .name = "fstatat", .alias = "newfstatat", },
617 { .name = "futex",
618 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
619 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
620 { .name = "futimesat",
621 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
622 { .name = "getitimer",
623 .arg = { [0] = STRARRAY(which, itimers), }, },
624 { .name = "getpid", .errpid = true, },
625 { .name = "getpgid", .errpid = true, },
626 { .name = "getppid", .errpid = true, },
627 { .name = "getrandom",
628 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
629 { .name = "getrlimit",
630 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
631 { .name = "gettid", .errpid = true, },
632 { .name = "ioctl",
633 .arg = {
634#if defined(__i386__) || defined(__x86_64__)
635/*
636 * FIXME: Make this available to all arches.
637 */
638 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
639 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
640#else
641 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
642#endif
643 { .name = "kcmp", .nr_args = 5,
644 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, },
645 [1] = { .name = "pid2", .scnprintf = SCA_PID, },
646 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, },
647 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, },
648 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, },
649 { .name = "keyctl",
650 .arg = { [0] = STRARRAY(option, keyctl_options), }, },
651 { .name = "kill",
652 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
653 { .name = "linkat",
654 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
655 { .name = "lseek",
656 .arg = { [2] = STRARRAY(whence, whences), }, },
657 { .name = "lstat", .alias = "newlstat", },
658 { .name = "madvise",
659 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
660 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
661 { .name = "mkdirat",
662 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
663 { .name = "mknodat",
664 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
665 { .name = "mlock",
666 .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
667 { .name = "mlockall",
668 .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
669 { .name = "mmap", .hexret = true,
670/* The standard mmap maps to old_mmap on s390x */
671#if defined(__s390x__)
672 .alias = "old_mmap",
673#endif
674 .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ },
675 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
676 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ }, }, },
677 { .name = "mprotect",
678 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
679 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, },
680 { .name = "mq_unlink",
681 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, },
682 { .name = "mremap", .hexret = true,
683 .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ },
684 [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ },
685 [4] = { .scnprintf = SCA_HEX, /* new_addr */ }, }, },
686 { .name = "munlock",
687 .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
688 { .name = "munmap",
689 .arg = { [0] = { .scnprintf = SCA_HEX, /* addr */ }, }, },
690 { .name = "name_to_handle_at",
691 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
692 { .name = "newfstatat",
693 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
694 { .name = "open",
695 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
696 { .name = "open_by_handle_at",
697 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
698 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
699 { .name = "openat",
700 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
701 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
702 { .name = "perf_event_open",
703 .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ },
704 [3] = { .scnprintf = SCA_FD, /* group_fd */ },
705 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
706 { .name = "pipe2",
707 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
708 { .name = "pkey_alloc",
709 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, },
710 { .name = "pkey_free",
711 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, },
712 { .name = "pkey_mprotect",
713 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
714 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
715 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, },
716 { .name = "poll", .timeout = true, },
717 { .name = "ppoll", .timeout = true, },
718 { .name = "prctl", .alias = "arch_prctl",
719 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ },
720 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
721 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
722 { .name = "pread", .alias = "pread64", },
723 { .name = "preadv", .alias = "pread", },
724 { .name = "prlimit64",
725 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, },
726 { .name = "pwrite", .alias = "pwrite64", },
727 { .name = "readlinkat",
728 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
729 { .name = "recvfrom",
730 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
731 { .name = "recvmmsg",
732 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
733 { .name = "recvmsg",
734 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
735 { .name = "renameat",
736 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
737 { .name = "rt_sigaction",
738 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
739 { .name = "rt_sigprocmask",
740 .arg = { [0] = STRARRAY(how, sighow), }, },
741 { .name = "rt_sigqueueinfo",
742 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
743 { .name = "rt_tgsigqueueinfo",
744 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
745 { .name = "sched_setscheduler",
746 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
747 { .name = "seccomp",
748 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ },
749 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
750 { .name = "select", .timeout = true, },
751 { .name = "sendmmsg",
752 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
753 { .name = "sendmsg",
754 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
755 { .name = "sendto",
756 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
757 { .name = "set_tid_address", .errpid = true, },
758 { .name = "setitimer",
759 .arg = { [0] = STRARRAY(which, itimers), }, },
760 { .name = "setrlimit",
761 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
762 { .name = "socket",
763 .arg = { [0] = STRARRAY(family, socket_families),
764 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, }, },
765 { .name = "socketpair",
766 .arg = { [0] = STRARRAY(family, socket_families),
767 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, }, },
768 { .name = "stat", .alias = "newstat", },
769 { .name = "statx",
770 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ },
771 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } ,
772 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, },
773 { .name = "swapoff",
774 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
775 { .name = "swapon",
776 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
777 { .name = "symlinkat",
778 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
779 { .name = "tgkill",
780 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
781 { .name = "tkill",
782 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
783 { .name = "uname", .alias = "newuname", },
784 { .name = "unlinkat",
785 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
786 { .name = "utimensat",
787 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
788 { .name = "wait4", .errpid = true,
789 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
790 { .name = "waitid", .errpid = true,
791 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
792};
793
794static int syscall_fmt__cmp(const void *name, const void *fmtp)
795{
796 const struct syscall_fmt *fmt = fmtp;
797 return strcmp(name, fmt->name);
798}
799
800static struct syscall_fmt *syscall_fmt__find(const char *name)
801{
802 const int nmemb = ARRAY_SIZE(syscall_fmts);
803 return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
804}
805
806struct syscall {
807 struct event_format *tp_format;
808 int nr_args;
809 struct format_field *args;
810 const char *name;
811 bool is_exit;
812 struct syscall_fmt *fmt;
813 struct syscall_arg_fmt *arg_fmt;
814};
815
816/*
817 * We need to have this 'calculated' boolean because in some cases we really
818 * don't know what is the duration of a syscall, for instance, when we start
819 * a session and some threads are waiting for a syscall to finish, say 'poll',
820 * in which case all we can do is to print "( ? ) for duration and for the
821 * start timestamp.
822 */
823static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
824{
825 double duration = (double)t / NSEC_PER_MSEC;
826 size_t printed = fprintf(fp, "(");
827
828 if (!calculated)
829 printed += fprintf(fp, " ");
830 else if (duration >= 1.0)
831 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
832 else if (duration >= 0.01)
833 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
834 else
835 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
836 return printed + fprintf(fp, "): ");
837}
838
839/**
840 * filename.ptr: The filename char pointer that will be vfs_getname'd
841 * filename.entry_str_pos: Where to insert the string translated from
842 * filename.ptr by the vfs_getname tracepoint/kprobe.
843 * ret_scnprintf: syscall args may set this to a different syscall return
844 * formatter, for instance, fcntl may return fds, file flags, etc.
845 */
846struct thread_trace {
847 u64 entry_time;
848 bool entry_pending;
849 unsigned long nr_events;
850 unsigned long pfmaj, pfmin;
851 char *entry_str;
852 double runtime_ms;
853 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
854 struct {
855 unsigned long ptr;
856 short int entry_str_pos;
857 bool pending_open;
858 unsigned int namelen;
859 char *name;
860 } filename;
861 struct {
862 int max;
863 char **table;
864 } paths;
865
866 struct intlist *syscall_stats;
867};
868
869static struct thread_trace *thread_trace__new(void)
870{
871 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
872
873 if (ttrace)
874 ttrace->paths.max = -1;
875
876 ttrace->syscall_stats = intlist__new(NULL);
877
878 return ttrace;
879}
880
881static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
882{
883 struct thread_trace *ttrace;
884
885 if (thread == NULL)
886 goto fail;
887
888 if (thread__priv(thread) == NULL)
889 thread__set_priv(thread, thread_trace__new());
890
891 if (thread__priv(thread) == NULL)
892 goto fail;
893
894 ttrace = thread__priv(thread);
895 ++ttrace->nr_events;
896
897 return ttrace;
898fail:
899 color_fprintf(fp, PERF_COLOR_RED,
900 "WARNING: not enough memory, dropping samples!\n");
901 return NULL;
902}
903
904
905void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
906 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
907{
908 struct thread_trace *ttrace = thread__priv(arg->thread);
909
910 ttrace->ret_scnprintf = ret_scnprintf;
911}
912
913#define TRACE_PFMAJ (1 << 0)
914#define TRACE_PFMIN (1 << 1)
915
916static const size_t trace__entry_str_size = 2048;
917
918static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
919{
920 struct thread_trace *ttrace = thread__priv(thread);
921
922 if (fd > ttrace->paths.max) {
923 char **npath = realloc(ttrace->paths.table, (fd + 1) * sizeof(char *));
924
925 if (npath == NULL)
926 return -1;
927
928 if (ttrace->paths.max != -1) {
929 memset(npath + ttrace->paths.max + 1, 0,
930 (fd - ttrace->paths.max) * sizeof(char *));
931 } else {
932 memset(npath, 0, (fd + 1) * sizeof(char *));
933 }
934
935 ttrace->paths.table = npath;
936 ttrace->paths.max = fd;
937 }
938
939 ttrace->paths.table[fd] = strdup(pathname);
940
941 return ttrace->paths.table[fd] != NULL ? 0 : -1;
942}
943
944static int thread__read_fd_path(struct thread *thread, int fd)
945{
946 char linkname[PATH_MAX], pathname[PATH_MAX];
947 struct stat st;
948 int ret;
949
950 if (thread->pid_ == thread->tid) {
951 scnprintf(linkname, sizeof(linkname),
952 "/proc/%d/fd/%d", thread->pid_, fd);
953 } else {
954 scnprintf(linkname, sizeof(linkname),
955 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd);
956 }
957
958 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
959 return -1;
960
961 ret = readlink(linkname, pathname, sizeof(pathname));
962
963 if (ret < 0 || ret > st.st_size)
964 return -1;
965
966 pathname[ret] = '\0';
967 return trace__set_fd_pathname(thread, fd, pathname);
968}
969
970static const char *thread__fd_path(struct thread *thread, int fd,
971 struct trace *trace)
972{
973 struct thread_trace *ttrace = thread__priv(thread);
974
975 if (ttrace == NULL)
976 return NULL;
977
978 if (fd < 0)
979 return NULL;
980
981 if ((fd > ttrace->paths.max || ttrace->paths.table[fd] == NULL)) {
982 if (!trace->live)
983 return NULL;
984 ++trace->stats.proc_getname;
985 if (thread__read_fd_path(thread, fd))
986 return NULL;
987 }
988
989 return ttrace->paths.table[fd];
990}
991
992size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
993{
994 int fd = arg->val;
995 size_t printed = scnprintf(bf, size, "%d", fd);
996 const char *path = thread__fd_path(arg->thread, fd, arg->trace);
997
998 if (path)
999 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1000
1001 return printed;
1002}
1003
1004size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
1005{
1006 size_t printed = scnprintf(bf, size, "%d", fd);
1007 struct thread *thread = machine__find_thread(trace->host, pid, pid);
1008
1009 if (thread) {
1010 const char *path = thread__fd_path(thread, fd, trace);
1011
1012 if (path)
1013 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1014
1015 thread__put(thread);
1016 }
1017
1018 return printed;
1019}
1020
1021static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
1022 struct syscall_arg *arg)
1023{
1024 int fd = arg->val;
1025 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
1026 struct thread_trace *ttrace = thread__priv(arg->thread);
1027
1028 if (ttrace && fd >= 0 && fd <= ttrace->paths.max)
1029 zfree(&ttrace->paths.table[fd]);
1030
1031 return printed;
1032}
1033
1034static void thread__set_filename_pos(struct thread *thread, const char *bf,
1035 unsigned long ptr)
1036{
1037 struct thread_trace *ttrace = thread__priv(thread);
1038
1039 ttrace->filename.ptr = ptr;
1040 ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
1041}
1042
1043static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
1044 struct syscall_arg *arg)
1045{
1046 unsigned long ptr = arg->val;
1047
1048 if (!arg->trace->vfs_getname)
1049 return scnprintf(bf, size, "%#x", ptr);
1050
1051 thread__set_filename_pos(arg->thread, bf, ptr);
1052 return 0;
1053}
1054
1055static bool trace__filter_duration(struct trace *trace, double t)
1056{
1057 return t < (trace->duration_filter * NSEC_PER_MSEC);
1058}
1059
1060static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1061{
1062 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
1063
1064 return fprintf(fp, "%10.3f ", ts);
1065}
1066
1067/*
1068 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
1069 * using ttrace->entry_time for a thread that receives a sys_exit without
1070 * first having received a sys_enter ("poll" issued before tracing session
1071 * starts, lost sys_enter exit due to ring buffer overflow).
1072 */
1073static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1074{
1075 if (tstamp > 0)
1076 return __trace__fprintf_tstamp(trace, tstamp, fp);
1077
1078 return fprintf(fp, " ? ");
1079}
1080
1081static bool done = false;
1082static bool interrupted = false;
1083
1084static void sig_handler(int sig)
1085{
1086 done = true;
1087 interrupted = sig == SIGINT;
1088}
1089
1090static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
1091 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
1092{
1093 size_t printed = trace__fprintf_tstamp(trace, tstamp, fp);
1094 printed += fprintf_duration(duration, duration_calculated, fp);
1095
1096 if (trace->multiple_threads) {
1097 if (trace->show_comm)
1098 printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
1099 printed += fprintf(fp, "%d ", thread->tid);
1100 }
1101
1102 return printed;
1103}
1104
1105static int trace__process_event(struct trace *trace, struct machine *machine,
1106 union perf_event *event, struct perf_sample *sample)
1107{
1108 int ret = 0;
1109
1110 switch (event->header.type) {
1111 case PERF_RECORD_LOST:
1112 color_fprintf(trace->output, PERF_COLOR_RED,
1113 "LOST %" PRIu64 " events!\n", event->lost.lost);
1114 ret = machine__process_lost_event(machine, event, sample);
1115 break;
1116 default:
1117 ret = machine__process_event(machine, event, sample);
1118 break;
1119 }
1120
1121 return ret;
1122}
1123
1124static int trace__tool_process(struct perf_tool *tool,
1125 union perf_event *event,
1126 struct perf_sample *sample,
1127 struct machine *machine)
1128{
1129 struct trace *trace = container_of(tool, struct trace, tool);
1130 return trace__process_event(trace, machine, event, sample);
1131}
1132
1133static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
1134{
1135 struct machine *machine = vmachine;
1136
1137 if (machine->kptr_restrict_warned)
1138 return NULL;
1139
1140 if (symbol_conf.kptr_restrict) {
1141 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
1142 "Check /proc/sys/kernel/kptr_restrict.\n\n"
1143 "Kernel samples will not be resolved.\n");
1144 machine->kptr_restrict_warned = true;
1145 return NULL;
1146 }
1147
1148 return machine__resolve_kernel_addr(vmachine, addrp, modp);
1149}
1150
1151static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist)
1152{
1153 int err = symbol__init(NULL);
1154
1155 if (err)
1156 return err;
1157
1158 trace->host = machine__new_host();
1159 if (trace->host == NULL)
1160 return -ENOMEM;
1161
1162 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
1163 if (err < 0)
1164 goto out;
1165
1166 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
1167 evlist->threads, trace__tool_process, false,
1168 trace->opts.proc_map_timeout, 1);
1169out:
1170 if (err)
1171 symbol__exit();
1172
1173 return err;
1174}
1175
1176static void trace__symbols__exit(struct trace *trace)
1177{
1178 machine__exit(trace->host);
1179 trace->host = NULL;
1180
1181 symbol__exit();
1182}
1183
1184static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
1185{
1186 int idx;
1187
1188 if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0)
1189 nr_args = sc->fmt->nr_args;
1190
1191 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
1192 if (sc->arg_fmt == NULL)
1193 return -1;
1194
1195 for (idx = 0; idx < nr_args; ++idx) {
1196 if (sc->fmt)
1197 sc->arg_fmt[idx] = sc->fmt->arg[idx];
1198 }
1199
1200 sc->nr_args = nr_args;
1201 return 0;
1202}
1203
1204static int syscall__set_arg_fmts(struct syscall *sc)
1205{
1206 struct format_field *field;
1207 int idx = 0, len;
1208
1209 for (field = sc->args; field; field = field->next, ++idx) {
1210 if (sc->fmt && sc->fmt->arg[idx].scnprintf)
1211 continue;
1212
1213 if (strcmp(field->type, "const char *") == 0 &&
1214 (strcmp(field->name, "filename") == 0 ||
1215 strcmp(field->name, "path") == 0 ||
1216 strcmp(field->name, "pathname") == 0))
1217 sc->arg_fmt[idx].scnprintf = SCA_FILENAME;
1218 else if (field->flags & FIELD_IS_POINTER)
1219 sc->arg_fmt[idx].scnprintf = syscall_arg__scnprintf_hex;
1220 else if (strcmp(field->type, "pid_t") == 0)
1221 sc->arg_fmt[idx].scnprintf = SCA_PID;
1222 else if (strcmp(field->type, "umode_t") == 0)
1223 sc->arg_fmt[idx].scnprintf = SCA_MODE_T;
1224 else if ((strcmp(field->type, "int") == 0 ||
1225 strcmp(field->type, "unsigned int") == 0 ||
1226 strcmp(field->type, "long") == 0) &&
1227 (len = strlen(field->name)) >= 2 &&
1228 strcmp(field->name + len - 2, "fd") == 0) {
1229 /*
1230 * /sys/kernel/tracing/events/syscalls/sys_enter*
1231 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
1232 * 65 int
1233 * 23 unsigned int
1234 * 7 unsigned long
1235 */
1236 sc->arg_fmt[idx].scnprintf = SCA_FD;
1237 }
1238 }
1239
1240 return 0;
1241}
1242
1243static int trace__read_syscall_info(struct trace *trace, int id)
1244{
1245 char tp_name[128];
1246 struct syscall *sc;
1247 const char *name = syscalltbl__name(trace->sctbl, id);
1248
1249 if (name == NULL)
1250 return -1;
1251
1252 if (id > trace->syscalls.max) {
1253 struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
1254
1255 if (nsyscalls == NULL)
1256 return -1;
1257
1258 if (trace->syscalls.max != -1) {
1259 memset(nsyscalls + trace->syscalls.max + 1, 0,
1260 (id - trace->syscalls.max) * sizeof(*sc));
1261 } else {
1262 memset(nsyscalls, 0, (id + 1) * sizeof(*sc));
1263 }
1264
1265 trace->syscalls.table = nsyscalls;
1266 trace->syscalls.max = id;
1267 }
1268
1269 sc = trace->syscalls.table + id;
1270 sc->name = name;
1271
1272 sc->fmt = syscall_fmt__find(sc->name);
1273
1274 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
1275 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1276
1277 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
1278 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
1279 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1280 }
1281
1282 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields))
1283 return -1;
1284
1285 if (IS_ERR(sc->tp_format))
1286 return -1;
1287
1288 sc->args = sc->tp_format->format.fields;
1289 /*
1290 * We need to check and discard the first variable '__syscall_nr'
1291 * or 'nr' that mean the syscall number. It is needless here.
1292 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
1293 */
1294 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
1295 sc->args = sc->args->next;
1296 --sc->nr_args;
1297 }
1298
1299 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
1300
1301 return syscall__set_arg_fmts(sc);
1302}
1303
1304static int trace__validate_ev_qualifier(struct trace *trace)
1305{
1306 int err = 0, i;
1307 size_t nr_allocated;
1308 struct str_node *pos;
1309
1310 trace->ev_qualifier_ids.nr = strlist__nr_entries(trace->ev_qualifier);
1311 trace->ev_qualifier_ids.entries = malloc(trace->ev_qualifier_ids.nr *
1312 sizeof(trace->ev_qualifier_ids.entries[0]));
1313
1314 if (trace->ev_qualifier_ids.entries == NULL) {
1315 fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
1316 trace->output);
1317 err = -EINVAL;
1318 goto out;
1319 }
1320
1321 nr_allocated = trace->ev_qualifier_ids.nr;
1322 i = 0;
1323
1324 strlist__for_each_entry(pos, trace->ev_qualifier) {
1325 const char *sc = pos->s;
1326 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
1327
1328 if (id < 0) {
1329 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
1330 if (id >= 0)
1331 goto matches;
1332
1333 if (err == 0) {
1334 fputs("Error:\tInvalid syscall ", trace->output);
1335 err = -EINVAL;
1336 } else {
1337 fputs(", ", trace->output);
1338 }
1339
1340 fputs(sc, trace->output);
1341 }
1342matches:
1343 trace->ev_qualifier_ids.entries[i++] = id;
1344 if (match_next == -1)
1345 continue;
1346
1347 while (1) {
1348 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
1349 if (id < 0)
1350 break;
1351 if (nr_allocated == trace->ev_qualifier_ids.nr) {
1352 void *entries;
1353
1354 nr_allocated += 8;
1355 entries = realloc(trace->ev_qualifier_ids.entries,
1356 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
1357 if (entries == NULL) {
1358 err = -ENOMEM;
1359 fputs("\nError:\t Not enough memory for parsing\n", trace->output);
1360 goto out_free;
1361 }
1362 trace->ev_qualifier_ids.entries = entries;
1363 }
1364 trace->ev_qualifier_ids.nr++;
1365 trace->ev_qualifier_ids.entries[i++] = id;
1366 }
1367 }
1368
1369 if (err < 0) {
1370 fputs("\nHint:\ttry 'perf list syscalls:sys_enter_*'"
1371 "\nHint:\tand: 'man syscalls'\n", trace->output);
1372out_free:
1373 zfree(&trace->ev_qualifier_ids.entries);
1374 trace->ev_qualifier_ids.nr = 0;
1375 }
1376out:
1377 return err;
1378}
1379
1380/*
1381 * args is to be interpreted as a series of longs but we need to handle
1382 * 8-byte unaligned accesses. args points to raw_data within the event
1383 * and raw_data is guaranteed to be 8-byte unaligned because it is
1384 * preceded by raw_size which is a u32. So we need to copy args to a temp
1385 * variable to read it. Most notably this avoids extended load instructions
1386 * on unaligned addresses
1387 */
1388unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
1389{
1390 unsigned long val;
1391 unsigned char *p = arg->args + sizeof(unsigned long) * idx;
1392
1393 memcpy(&val, p, sizeof(val));
1394 return val;
1395}
1396
1397static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
1398 struct syscall_arg *arg)
1399{
1400 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
1401 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
1402
1403 return scnprintf(bf, size, "arg%d: ", arg->idx);
1404}
1405
1406static size_t syscall__scnprintf_val(struct syscall *sc, char *bf, size_t size,
1407 struct syscall_arg *arg, unsigned long val)
1408{
1409 if (sc->arg_fmt && sc->arg_fmt[arg->idx].scnprintf) {
1410 arg->val = val;
1411 if (sc->arg_fmt[arg->idx].parm)
1412 arg->parm = sc->arg_fmt[arg->idx].parm;
1413 return sc->arg_fmt[arg->idx].scnprintf(bf, size, arg);
1414 }
1415 return scnprintf(bf, size, "%ld", val);
1416}
1417
1418static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
1419 unsigned char *args, struct trace *trace,
1420 struct thread *thread)
1421{
1422 size_t printed = 0;
1423 unsigned long val;
1424 u8 bit = 1;
1425 struct syscall_arg arg = {
1426 .args = args,
1427 .idx = 0,
1428 .mask = 0,
1429 .trace = trace,
1430 .thread = thread,
1431 };
1432 struct thread_trace *ttrace = thread__priv(thread);
1433
1434 /*
1435 * Things like fcntl will set this in its 'cmd' formatter to pick the
1436 * right formatter for the return value (an fd? file flags?), which is
1437 * not needed for syscalls that always return a given type, say an fd.
1438 */
1439 ttrace->ret_scnprintf = NULL;
1440
1441 if (sc->args != NULL) {
1442 struct format_field *field;
1443
1444 for (field = sc->args; field;
1445 field = field->next, ++arg.idx, bit <<= 1) {
1446 if (arg.mask & bit)
1447 continue;
1448
1449 val = syscall_arg__val(&arg, arg.idx);
1450
1451 /*
1452 * Suppress this argument if its value is zero and
1453 * and we don't have a string associated in an
1454 * strarray for it.
1455 */
1456 if (val == 0 &&
1457 !(sc->arg_fmt &&
1458 (sc->arg_fmt[arg.idx].show_zero ||
1459 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
1460 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
1461 sc->arg_fmt[arg.idx].parm))
1462 continue;
1463
1464 printed += scnprintf(bf + printed, size - printed,
1465 "%s%s: ", printed ? ", " : "", field->name);
1466 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
1467 }
1468 } else if (IS_ERR(sc->tp_format)) {
1469 /*
1470 * If we managed to read the tracepoint /format file, then we
1471 * may end up not having any args, like with gettid(), so only
1472 * print the raw args when we didn't manage to read it.
1473 */
1474 while (arg.idx < sc->nr_args) {
1475 if (arg.mask & bit)
1476 goto next_arg;
1477 val = syscall_arg__val(&arg, arg.idx);
1478 if (printed)
1479 printed += scnprintf(bf + printed, size - printed, ", ");
1480 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
1481 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val);
1482next_arg:
1483 ++arg.idx;
1484 bit <<= 1;
1485 }
1486 }
1487
1488 return printed;
1489}
1490
1491typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel,
1492 union perf_event *event,
1493 struct perf_sample *sample);
1494
1495static struct syscall *trace__syscall_info(struct trace *trace,
1496 struct perf_evsel *evsel, int id)
1497{
1498
1499 if (id < 0) {
1500
1501 /*
1502 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
1503 * before that, leaving at a higher verbosity level till that is
1504 * explained. Reproduced with plain ftrace with:
1505 *
1506 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
1507 * grep "NR -1 " /t/trace_pipe
1508 *
1509 * After generating some load on the machine.
1510 */
1511 if (verbose > 1) {
1512 static u64 n;
1513 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
1514 id, perf_evsel__name(evsel), ++n);
1515 }
1516 return NULL;
1517 }
1518
1519 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) &&
1520 trace__read_syscall_info(trace, id))
1521 goto out_cant_read;
1522
1523 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL))
1524 goto out_cant_read;
1525
1526 return &trace->syscalls.table[id];
1527
1528out_cant_read:
1529 if (verbose > 0) {
1530 fprintf(trace->output, "Problems reading syscall %d", id);
1531 if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL)
1532 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
1533 fputs(" information\n", trace->output);
1534 }
1535 return NULL;
1536}
1537
1538static void thread__update_stats(struct thread_trace *ttrace,
1539 int id, struct perf_sample *sample)
1540{
1541 struct int_node *inode;
1542 struct stats *stats;
1543 u64 duration = 0;
1544
1545 inode = intlist__findnew(ttrace->syscall_stats, id);
1546 if (inode == NULL)
1547 return;
1548
1549 stats = inode->priv;
1550 if (stats == NULL) {
1551 stats = malloc(sizeof(struct stats));
1552 if (stats == NULL)
1553 return;
1554 init_stats(stats);
1555 inode->priv = stats;
1556 }
1557
1558 if (ttrace->entry_time && sample->time > ttrace->entry_time)
1559 duration = sample->time - ttrace->entry_time;
1560
1561 update_stats(stats, duration);
1562}
1563
1564static int trace__printf_interrupted_entry(struct trace *trace)
1565{
1566 struct thread_trace *ttrace;
1567 size_t printed;
1568
1569 if (trace->failure_only || trace->current == NULL)
1570 return 0;
1571
1572 ttrace = thread__priv(trace->current);
1573
1574 if (!ttrace->entry_pending)
1575 return 0;
1576
1577 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
1578 printed += fprintf(trace->output, "%-70s) ...\n", ttrace->entry_str);
1579 ttrace->entry_pending = false;
1580
1581 return printed;
1582}
1583
1584static int trace__fprintf_sample(struct trace *trace, struct perf_evsel *evsel,
1585 struct perf_sample *sample, struct thread *thread)
1586{
1587 int printed = 0;
1588
1589 if (trace->print_sample) {
1590 double ts = (double)sample->time / NSEC_PER_MSEC;
1591
1592 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
1593 perf_evsel__name(evsel), ts,
1594 thread__comm_str(thread),
1595 sample->pid, sample->tid, sample->cpu);
1596 }
1597
1598 return printed;
1599}
1600
1601static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
1602 union perf_event *event __maybe_unused,
1603 struct perf_sample *sample)
1604{
1605 char *msg;
1606 void *args;
1607 size_t printed = 0;
1608 struct thread *thread;
1609 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
1610 struct syscall *sc = trace__syscall_info(trace, evsel, id);
1611 struct thread_trace *ttrace;
1612
1613 if (sc == NULL)
1614 return -1;
1615
1616 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1617 ttrace = thread__trace(thread, trace->output);
1618 if (ttrace == NULL)
1619 goto out_put;
1620
1621 trace__fprintf_sample(trace, evsel, sample, thread);
1622
1623 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
1624
1625 if (ttrace->entry_str == NULL) {
1626 ttrace->entry_str = malloc(trace__entry_str_size);
1627 if (!ttrace->entry_str)
1628 goto out_put;
1629 }
1630
1631 if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
1632 trace__printf_interrupted_entry(trace);
1633
1634 ttrace->entry_time = sample->time;
1635 msg = ttrace->entry_str;
1636 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
1637
1638 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
1639 args, trace, thread);
1640
1641 if (sc->is_exit) {
1642 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
1643 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
1644 fprintf(trace->output, "%-70s)\n", ttrace->entry_str);
1645 }
1646 } else {
1647 ttrace->entry_pending = true;
1648 /* See trace__vfs_getname & trace__sys_exit */
1649 ttrace->filename.pending_open = false;
1650 }
1651
1652 if (trace->current != thread) {
1653 thread__put(trace->current);
1654 trace->current = thread__get(thread);
1655 }
1656 err = 0;
1657out_put:
1658 thread__put(thread);
1659 return err;
1660}
1661
1662static int trace__resolve_callchain(struct trace *trace, struct perf_evsel *evsel,
1663 struct perf_sample *sample,
1664 struct callchain_cursor *cursor)
1665{
1666 struct addr_location al;
1667 int max_stack = evsel->attr.sample_max_stack ?
1668 evsel->attr.sample_max_stack :
1669 trace->max_stack;
1670
1671 if (machine__resolve(trace->host, &al, sample) < 0 ||
1672 thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack))
1673 return -1;
1674
1675 return 0;
1676}
1677
1678static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
1679{
1680 /* TODO: user-configurable print_opts */
1681 const unsigned int print_opts = EVSEL__PRINT_SYM |
1682 EVSEL__PRINT_DSO |
1683 EVSEL__PRINT_UNKNOWN_AS_ADDR;
1684
1685 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output);
1686}
1687
1688static const char *errno_to_name(struct perf_evsel *evsel, int err)
1689{
1690 struct perf_env *env = perf_evsel__env(evsel);
1691 const char *arch_name = perf_env__arch(env);
1692
1693 return arch_syscalls__strerrno(arch_name, err);
1694}
1695
1696static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
1697 union perf_event *event __maybe_unused,
1698 struct perf_sample *sample)
1699{
1700 long ret;
1701 u64 duration = 0;
1702 bool duration_calculated = false;
1703 struct thread *thread;
1704 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0;
1705 struct syscall *sc = trace__syscall_info(trace, evsel, id);
1706 struct thread_trace *ttrace;
1707
1708 if (sc == NULL)
1709 return -1;
1710
1711 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1712 ttrace = thread__trace(thread, trace->output);
1713 if (ttrace == NULL)
1714 goto out_put;
1715
1716 trace__fprintf_sample(trace, evsel, sample, thread);
1717
1718 if (trace->summary)
1719 thread__update_stats(ttrace, id, sample);
1720
1721 ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
1722
1723 if (id == trace->open_id && ret >= 0 && ttrace->filename.pending_open) {
1724 trace__set_fd_pathname(thread, ret, ttrace->filename.name);
1725 ttrace->filename.pending_open = false;
1726 ++trace->stats.vfs_getname;
1727 }
1728
1729 if (ttrace->entry_time) {
1730 duration = sample->time - ttrace->entry_time;
1731 if (trace__filter_duration(trace, duration))
1732 goto out;
1733 duration_calculated = true;
1734 } else if (trace->duration_filter)
1735 goto out;
1736
1737 if (sample->callchain) {
1738 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
1739 if (callchain_ret == 0) {
1740 if (callchain_cursor.nr < trace->min_stack)
1741 goto out;
1742 callchain_ret = 1;
1743 }
1744 }
1745
1746 if (trace->summary_only || (ret >= 0 && trace->failure_only))
1747 goto out;
1748
1749 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
1750
1751 if (ttrace->entry_pending) {
1752 fprintf(trace->output, "%-70s", ttrace->entry_str);
1753 } else {
1754 fprintf(trace->output, " ... [");
1755 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
1756 fprintf(trace->output, "]: %s()", sc->name);
1757 }
1758
1759 if (sc->fmt == NULL) {
1760 if (ret < 0)
1761 goto errno_print;
1762signed_print:
1763 fprintf(trace->output, ") = %ld", ret);
1764 } else if (ret < 0) {
1765errno_print: {
1766 char bf[STRERR_BUFSIZE];
1767 const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
1768 *e = errno_to_name(evsel, -ret);
1769
1770 fprintf(trace->output, ") = -1 %s %s", e, emsg);
1771 }
1772 } else if (ret == 0 && sc->fmt->timeout)
1773 fprintf(trace->output, ") = 0 Timeout");
1774 else if (ttrace->ret_scnprintf) {
1775 char bf[1024];
1776 struct syscall_arg arg = {
1777 .val = ret,
1778 .thread = thread,
1779 .trace = trace,
1780 };
1781 ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
1782 ttrace->ret_scnprintf = NULL;
1783 fprintf(trace->output, ") = %s", bf);
1784 } else if (sc->fmt->hexret)
1785 fprintf(trace->output, ") = %#lx", ret);
1786 else if (sc->fmt->errpid) {
1787 struct thread *child = machine__find_thread(trace->host, ret, ret);
1788
1789 if (child != NULL) {
1790 fprintf(trace->output, ") = %ld", ret);
1791 if (child->comm_set)
1792 fprintf(trace->output, " (%s)", thread__comm_str(child));
1793 thread__put(child);
1794 }
1795 } else
1796 goto signed_print;
1797
1798 fputc('\n', trace->output);
1799
1800 if (callchain_ret > 0)
1801 trace__fprintf_callchain(trace, sample);
1802 else if (callchain_ret < 0)
1803 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
1804out:
1805 ttrace->entry_pending = false;
1806 err = 0;
1807out_put:
1808 thread__put(thread);
1809 return err;
1810}
1811
1812static int trace__vfs_getname(struct trace *trace, struct perf_evsel *evsel,
1813 union perf_event *event __maybe_unused,
1814 struct perf_sample *sample)
1815{
1816 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
1817 struct thread_trace *ttrace;
1818 size_t filename_len, entry_str_len, to_move;
1819 ssize_t remaining_space;
1820 char *pos;
1821 const char *filename = perf_evsel__rawptr(evsel, sample, "pathname");
1822
1823 if (!thread)
1824 goto out;
1825
1826 ttrace = thread__priv(thread);
1827 if (!ttrace)
1828 goto out_put;
1829
1830 filename_len = strlen(filename);
1831 if (filename_len == 0)
1832 goto out_put;
1833
1834 if (ttrace->filename.namelen < filename_len) {
1835 char *f = realloc(ttrace->filename.name, filename_len + 1);
1836
1837 if (f == NULL)
1838 goto out_put;
1839
1840 ttrace->filename.namelen = filename_len;
1841 ttrace->filename.name = f;
1842 }
1843
1844 strcpy(ttrace->filename.name, filename);
1845 ttrace->filename.pending_open = true;
1846
1847 if (!ttrace->filename.ptr)
1848 goto out_put;
1849
1850 entry_str_len = strlen(ttrace->entry_str);
1851 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
1852 if (remaining_space <= 0)
1853 goto out_put;
1854
1855 if (filename_len > (size_t)remaining_space) {
1856 filename += filename_len - remaining_space;
1857 filename_len = remaining_space;
1858 }
1859
1860 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
1861 pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
1862 memmove(pos + filename_len, pos, to_move);
1863 memcpy(pos, filename, filename_len);
1864
1865 ttrace->filename.ptr = 0;
1866 ttrace->filename.entry_str_pos = 0;
1867out_put:
1868 thread__put(thread);
1869out:
1870 return 0;
1871}
1872
1873static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel,
1874 union perf_event *event __maybe_unused,
1875 struct perf_sample *sample)
1876{
1877 u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
1878 double runtime_ms = (double)runtime / NSEC_PER_MSEC;
1879 struct thread *thread = machine__findnew_thread(trace->host,
1880 sample->pid,
1881 sample->tid);
1882 struct thread_trace *ttrace = thread__trace(thread, trace->output);
1883
1884 if (ttrace == NULL)
1885 goto out_dump;
1886
1887 ttrace->runtime_ms += runtime_ms;
1888 trace->runtime_ms += runtime_ms;
1889out_put:
1890 thread__put(thread);
1891 return 0;
1892
1893out_dump:
1894 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
1895 evsel->name,
1896 perf_evsel__strval(evsel, sample, "comm"),
1897 (pid_t)perf_evsel__intval(evsel, sample, "pid"),
1898 runtime,
1899 perf_evsel__intval(evsel, sample, "vruntime"));
1900 goto out_put;
1901}
1902
1903static int bpf_output__printer(enum binary_printer_ops op,
1904 unsigned int val, void *extra __maybe_unused, FILE *fp)
1905{
1906 unsigned char ch = (unsigned char)val;
1907
1908 switch (op) {
1909 case BINARY_PRINT_CHAR_DATA:
1910 return fprintf(fp, "%c", isprint(ch) ? ch : '.');
1911 case BINARY_PRINT_DATA_BEGIN:
1912 case BINARY_PRINT_LINE_BEGIN:
1913 case BINARY_PRINT_ADDR:
1914 case BINARY_PRINT_NUM_DATA:
1915 case BINARY_PRINT_NUM_PAD:
1916 case BINARY_PRINT_SEP:
1917 case BINARY_PRINT_CHAR_PAD:
1918 case BINARY_PRINT_LINE_END:
1919 case BINARY_PRINT_DATA_END:
1920 default:
1921 break;
1922 }
1923
1924 return 0;
1925}
1926
1927static void bpf_output__fprintf(struct trace *trace,
1928 struct perf_sample *sample)
1929{
1930 binary__fprintf(sample->raw_data, sample->raw_size, 8,
1931 bpf_output__printer, NULL, trace->output);
1932}
1933
1934static int trace__event_handler(struct trace *trace, struct perf_evsel *evsel,
1935 union perf_event *event __maybe_unused,
1936 struct perf_sample *sample)
1937{
1938 int callchain_ret = 0;
1939
1940 if (sample->callchain) {
1941 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
1942 if (callchain_ret == 0) {
1943 if (callchain_cursor.nr < trace->min_stack)
1944 goto out;
1945 callchain_ret = 1;
1946 }
1947 }
1948
1949 trace__printf_interrupted_entry(trace);
1950 trace__fprintf_tstamp(trace, sample->time, trace->output);
1951
1952 if (trace->trace_syscalls)
1953 fprintf(trace->output, "( ): ");
1954
1955 fprintf(trace->output, "%s:", evsel->name);
1956
1957 if (perf_evsel__is_bpf_output(evsel)) {
1958 bpf_output__fprintf(trace, sample);
1959 } else if (evsel->tp_format) {
1960 event_format__fprintf(evsel->tp_format, sample->cpu,
1961 sample->raw_data, sample->raw_size,
1962 trace->output);
1963 }
1964
1965 fprintf(trace->output, "\n");
1966
1967 if (callchain_ret > 0)
1968 trace__fprintf_callchain(trace, sample);
1969 else if (callchain_ret < 0)
1970 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
1971out:
1972 return 0;
1973}
1974
1975static void print_location(FILE *f, struct perf_sample *sample,
1976 struct addr_location *al,
1977 bool print_dso, bool print_sym)
1978{
1979
1980 if ((verbose > 0 || print_dso) && al->map)
1981 fprintf(f, "%s@", al->map->dso->long_name);
1982
1983 if ((verbose > 0 || print_sym) && al->sym)
1984 fprintf(f, "%s+0x%" PRIx64, al->sym->name,
1985 al->addr - al->sym->start);
1986 else if (al->map)
1987 fprintf(f, "0x%" PRIx64, al->addr);
1988 else
1989 fprintf(f, "0x%" PRIx64, sample->addr);
1990}
1991
1992static int trace__pgfault(struct trace *trace,
1993 struct perf_evsel *evsel,
1994 union perf_event *event __maybe_unused,
1995 struct perf_sample *sample)
1996{
1997 struct thread *thread;
1998 struct addr_location al;
1999 char map_type = 'd';
2000 struct thread_trace *ttrace;
2001 int err = -1;
2002 int callchain_ret = 0;
2003
2004 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2005
2006 if (sample->callchain) {
2007 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2008 if (callchain_ret == 0) {
2009 if (callchain_cursor.nr < trace->min_stack)
2010 goto out_put;
2011 callchain_ret = 1;
2012 }
2013 }
2014
2015 ttrace = thread__trace(thread, trace->output);
2016 if (ttrace == NULL)
2017 goto out_put;
2018
2019 if (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
2020 ttrace->pfmaj++;
2021 else
2022 ttrace->pfmin++;
2023
2024 if (trace->summary_only)
2025 goto out;
2026
2027 thread__find_addr_location(thread, sample->cpumode, MAP__FUNCTION,
2028 sample->ip, &al);
2029
2030 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
2031
2032 fprintf(trace->output, "%sfault [",
2033 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
2034 "maj" : "min");
2035
2036 print_location(trace->output, sample, &al, false, true);
2037
2038 fprintf(trace->output, "] => ");
2039
2040 thread__find_addr_location(thread, sample->cpumode, MAP__VARIABLE,
2041 sample->addr, &al);
2042
2043 if (!al.map) {
2044 thread__find_addr_location(thread, sample->cpumode,
2045 MAP__FUNCTION, sample->addr, &al);
2046
2047 if (al.map)
2048 map_type = 'x';
2049 else
2050 map_type = '?';
2051 }
2052
2053 print_location(trace->output, sample, &al, true, false);
2054
2055 fprintf(trace->output, " (%c%c)\n", map_type, al.level);
2056
2057 if (callchain_ret > 0)
2058 trace__fprintf_callchain(trace, sample);
2059 else if (callchain_ret < 0)
2060 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
2061out:
2062 err = 0;
2063out_put:
2064 thread__put(thread);
2065 return err;
2066}
2067
2068static void trace__set_base_time(struct trace *trace,
2069 struct perf_evsel *evsel,
2070 struct perf_sample *sample)
2071{
2072 /*
2073 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
2074 * and don't use sample->time unconditionally, we may end up having
2075 * some other event in the future without PERF_SAMPLE_TIME for good
2076 * reason, i.e. we may not be interested in its timestamps, just in
2077 * it taking place, picking some piece of information when it
2078 * appears in our event stream (vfs_getname comes to mind).
2079 */
2080 if (trace->base_time == 0 && !trace->full_time &&
2081 (evsel->attr.sample_type & PERF_SAMPLE_TIME))
2082 trace->base_time = sample->time;
2083}
2084
2085static int trace__process_sample(struct perf_tool *tool,
2086 union perf_event *event,
2087 struct perf_sample *sample,
2088 struct perf_evsel *evsel,
2089 struct machine *machine __maybe_unused)
2090{
2091 struct trace *trace = container_of(tool, struct trace, tool);
2092 struct thread *thread;
2093 int err = 0;
2094
2095 tracepoint_handler handler = evsel->handler;
2096
2097 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2098 if (thread && thread__is_filtered(thread))
2099 goto out;
2100
2101 trace__set_base_time(trace, evsel, sample);
2102
2103 if (handler) {
2104 ++trace->nr_events;
2105 handler(trace, evsel, event, sample);
2106 }
2107out:
2108 thread__put(thread);
2109 return err;
2110}
2111
2112static int trace__record(struct trace *trace, int argc, const char **argv)
2113{
2114 unsigned int rec_argc, i, j;
2115 const char **rec_argv;
2116 const char * const record_args[] = {
2117 "record",
2118 "-R",
2119 "-m", "1024",
2120 "-c", "1",
2121 };
2122
2123 const char * const sc_args[] = { "-e", };
2124 unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
2125 const char * const majpf_args[] = { "-e", "major-faults" };
2126 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
2127 const char * const minpf_args[] = { "-e", "minor-faults" };
2128 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
2129
2130 /* +1 is for the event string below */
2131 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 +
2132 majpf_args_nr + minpf_args_nr + argc;
2133 rec_argv = calloc(rec_argc + 1, sizeof(char *));
2134
2135 if (rec_argv == NULL)
2136 return -ENOMEM;
2137
2138 j = 0;
2139 for (i = 0; i < ARRAY_SIZE(record_args); i++)
2140 rec_argv[j++] = record_args[i];
2141
2142 if (trace->trace_syscalls) {
2143 for (i = 0; i < sc_args_nr; i++)
2144 rec_argv[j++] = sc_args[i];
2145
2146 /* event string may be different for older kernels - e.g., RHEL6 */
2147 if (is_valid_tracepoint("raw_syscalls:sys_enter"))
2148 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
2149 else if (is_valid_tracepoint("syscalls:sys_enter"))
2150 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
2151 else {
2152 pr_err("Neither raw_syscalls nor syscalls events exist.\n");
2153 free(rec_argv);
2154 return -1;
2155 }
2156 }
2157
2158 if (trace->trace_pgfaults & TRACE_PFMAJ)
2159 for (i = 0; i < majpf_args_nr; i++)
2160 rec_argv[j++] = majpf_args[i];
2161
2162 if (trace->trace_pgfaults & TRACE_PFMIN)
2163 for (i = 0; i < minpf_args_nr; i++)
2164 rec_argv[j++] = minpf_args[i];
2165
2166 for (i = 0; i < (unsigned int)argc; i++)
2167 rec_argv[j++] = argv[i];
2168
2169 return cmd_record(j, rec_argv);
2170}
2171
2172static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
2173
2174static bool perf_evlist__add_vfs_getname(struct perf_evlist *evlist)
2175{
2176 struct perf_evsel *evsel = perf_evsel__newtp("probe", "vfs_getname");
2177
2178 if (IS_ERR(evsel))
2179 return false;
2180
2181 if (perf_evsel__field(evsel, "pathname") == NULL) {
2182 perf_evsel__delete(evsel);
2183 return false;
2184 }
2185
2186 evsel->handler = trace__vfs_getname;
2187 perf_evlist__add(evlist, evsel);
2188 return true;
2189}
2190
2191static struct perf_evsel *perf_evsel__new_pgfault(u64 config)
2192{
2193 struct perf_evsel *evsel;
2194 struct perf_event_attr attr = {
2195 .type = PERF_TYPE_SOFTWARE,
2196 .mmap_data = 1,
2197 };
2198
2199 attr.config = config;
2200 attr.sample_period = 1;
2201
2202 event_attr_init(&attr);
2203
2204 evsel = perf_evsel__new(&attr);
2205 if (evsel)
2206 evsel->handler = trace__pgfault;
2207
2208 return evsel;
2209}
2210
2211static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
2212{
2213 const u32 type = event->header.type;
2214 struct perf_evsel *evsel;
2215
2216 if (type != PERF_RECORD_SAMPLE) {
2217 trace__process_event(trace, trace->host, event, sample);
2218 return;
2219 }
2220
2221 evsel = perf_evlist__id2evsel(trace->evlist, sample->id);
2222 if (evsel == NULL) {
2223 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
2224 return;
2225 }
2226
2227 trace__set_base_time(trace, evsel, sample);
2228
2229 if (evsel->attr.type == PERF_TYPE_TRACEPOINT &&
2230 sample->raw_data == NULL) {
2231 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
2232 perf_evsel__name(evsel), sample->tid,
2233 sample->cpu, sample->raw_size);
2234 } else {
2235 tracepoint_handler handler = evsel->handler;
2236 handler(trace, evsel, event, sample);
2237 }
2238}
2239
2240static int trace__add_syscall_newtp(struct trace *trace)
2241{
2242 int ret = -1;
2243 struct perf_evlist *evlist = trace->evlist;
2244 struct perf_evsel *sys_enter, *sys_exit;
2245
2246 sys_enter = perf_evsel__syscall_newtp("sys_enter", trace__sys_enter);
2247 if (sys_enter == NULL)
2248 goto out;
2249
2250 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
2251 goto out_delete_sys_enter;
2252
2253 sys_exit = perf_evsel__syscall_newtp("sys_exit", trace__sys_exit);
2254 if (sys_exit == NULL)
2255 goto out_delete_sys_enter;
2256
2257 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
2258 goto out_delete_sys_exit;
2259
2260 perf_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
2261 perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
2262
2263 perf_evlist__add(evlist, sys_enter);
2264 perf_evlist__add(evlist, sys_exit);
2265
2266 if (callchain_param.enabled && !trace->kernel_syscallchains) {
2267 /*
2268 * We're interested only in the user space callchain
2269 * leading to the syscall, allow overriding that for
2270 * debugging reasons using --kernel_syscall_callchains
2271 */
2272 sys_exit->attr.exclude_callchain_kernel = 1;
2273 }
2274
2275 trace->syscalls.events.sys_enter = sys_enter;
2276 trace->syscalls.events.sys_exit = sys_exit;
2277
2278 ret = 0;
2279out:
2280 return ret;
2281
2282out_delete_sys_exit:
2283 perf_evsel__delete_priv(sys_exit);
2284out_delete_sys_enter:
2285 perf_evsel__delete_priv(sys_enter);
2286 goto out;
2287}
2288
2289static int trace__set_ev_qualifier_filter(struct trace *trace)
2290{
2291 int err = -1;
2292 struct perf_evsel *sys_exit;
2293 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
2294 trace->ev_qualifier_ids.nr,
2295 trace->ev_qualifier_ids.entries);
2296
2297 if (filter == NULL)
2298 goto out_enomem;
2299
2300 if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter,
2301 filter)) {
2302 sys_exit = trace->syscalls.events.sys_exit;
2303 err = perf_evsel__append_tp_filter(sys_exit, filter);
2304 }
2305
2306 free(filter);
2307out:
2308 return err;
2309out_enomem:
2310 errno = ENOMEM;
2311 goto out;
2312}
2313
2314static int trace__set_filter_loop_pids(struct trace *trace)
2315{
2316 unsigned int nr = 1;
2317 pid_t pids[32] = {
2318 getpid(),
2319 };
2320 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
2321
2322 while (thread && nr < ARRAY_SIZE(pids)) {
2323 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid);
2324
2325 if (parent == NULL)
2326 break;
2327
2328 if (!strcmp(thread__comm_str(parent), "sshd")) {
2329 pids[nr++] = parent->tid;
2330 break;
2331 }
2332 thread = parent;
2333 }
2334
2335 return perf_evlist__set_filter_pids(trace->evlist, nr, pids);
2336}
2337
2338static int trace__run(struct trace *trace, int argc, const char **argv)
2339{
2340 struct perf_evlist *evlist = trace->evlist;
2341 struct perf_evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
2342 int err = -1, i;
2343 unsigned long before;
2344 const bool forks = argc > 0;
2345 bool draining = false;
2346
2347 trace->live = true;
2348
2349 if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
2350 goto out_error_raw_syscalls;
2351
2352 if (trace->trace_syscalls)
2353 trace->vfs_getname = perf_evlist__add_vfs_getname(evlist);
2354
2355 if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
2356 pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
2357 if (pgfault_maj == NULL)
2358 goto out_error_mem;
2359 perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
2360 perf_evlist__add(evlist, pgfault_maj);
2361 }
2362
2363 if ((trace->trace_pgfaults & TRACE_PFMIN)) {
2364 pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
2365 if (pgfault_min == NULL)
2366 goto out_error_mem;
2367 perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
2368 perf_evlist__add(evlist, pgfault_min);
2369 }
2370
2371 if (trace->sched &&
2372 perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime",
2373 trace__sched_stat_runtime))
2374 goto out_error_sched_stat_runtime;
2375
2376 /*
2377 * If a global cgroup was set, apply it to all the events without an
2378 * explicit cgroup. I.e.:
2379 *
2380 * trace -G A -e sched:*switch
2381 *
2382 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
2383 * _and_ sched:sched_switch to the 'A' cgroup, while:
2384 *
2385 * trace -e sched:*switch -G A
2386 *
2387 * will only set the sched:sched_switch event to the 'A' cgroup, all the
2388 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
2389 * a cgroup (on the root cgroup, sys wide, etc).
2390 *
2391 * Multiple cgroups:
2392 *
2393 * trace -G A -e sched:*switch -G B
2394 *
2395 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
2396 * to the 'B' cgroup.
2397 *
2398 * evlist__set_default_cgroup() grabs a reference of the passed cgroup
2399 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
2400 */
2401 if (trace->cgroup)
2402 evlist__set_default_cgroup(trace->evlist, trace->cgroup);
2403
2404 err = perf_evlist__create_maps(evlist, &trace->opts.target);
2405 if (err < 0) {
2406 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
2407 goto out_delete_evlist;
2408 }
2409
2410 err = trace__symbols_init(trace, evlist);
2411 if (err < 0) {
2412 fprintf(trace->output, "Problems initializing symbol libraries!\n");
2413 goto out_delete_evlist;
2414 }
2415
2416 perf_evlist__config(evlist, &trace->opts, &callchain_param);
2417
2418 signal(SIGCHLD, sig_handler);
2419 signal(SIGINT, sig_handler);
2420
2421 if (forks) {
2422 err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
2423 argv, false, NULL);
2424 if (err < 0) {
2425 fprintf(trace->output, "Couldn't run the workload!\n");
2426 goto out_delete_evlist;
2427 }
2428 }
2429
2430 err = perf_evlist__open(evlist);
2431 if (err < 0)
2432 goto out_error_open;
2433
2434 err = bpf__apply_obj_config();
2435 if (err) {
2436 char errbuf[BUFSIZ];
2437
2438 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
2439 pr_err("ERROR: Apply config to BPF failed: %s\n",
2440 errbuf);
2441 goto out_error_open;
2442 }
2443
2444 /*
2445 * Better not use !target__has_task() here because we need to cover the
2446 * case where no threads were specified in the command line, but a
2447 * workload was, and in that case we will fill in the thread_map when
2448 * we fork the workload in perf_evlist__prepare_workload.
2449 */
2450 if (trace->filter_pids.nr > 0)
2451 err = perf_evlist__set_filter_pids(evlist, trace->filter_pids.nr, trace->filter_pids.entries);
2452 else if (thread_map__pid(evlist->threads, 0) == -1)
2453 err = trace__set_filter_loop_pids(trace);
2454
2455 if (err < 0)
2456 goto out_error_mem;
2457
2458 if (trace->ev_qualifier_ids.nr > 0) {
2459 err = trace__set_ev_qualifier_filter(trace);
2460 if (err < 0)
2461 goto out_errno;
2462
2463 pr_debug("event qualifier tracepoint filter: %s\n",
2464 trace->syscalls.events.sys_exit->filter);
2465 }
2466
2467 err = perf_evlist__apply_filters(evlist, &evsel);
2468 if (err < 0)
2469 goto out_error_apply_filters;
2470
2471 err = perf_evlist__mmap(evlist, trace->opts.mmap_pages);
2472 if (err < 0)
2473 goto out_error_mmap;
2474
2475 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
2476 perf_evlist__enable(evlist);
2477
2478 if (forks)
2479 perf_evlist__start_workload(evlist);
2480
2481 if (trace->opts.initial_delay) {
2482 usleep(trace->opts.initial_delay * 1000);
2483 perf_evlist__enable(evlist);
2484 }
2485
2486 trace->multiple_threads = thread_map__pid(evlist->threads, 0) == -1 ||
2487 evlist->threads->nr > 1 ||
2488 perf_evlist__first(evlist)->attr.inherit;
2489
2490 /*
2491 * Now that we already used evsel->attr to ask the kernel to setup the
2492 * events, lets reuse evsel->attr.sample_max_stack as the limit in
2493 * trace__resolve_callchain(), allowing per-event max-stack settings
2494 * to override an explicitely set --max-stack global setting.
2495 */
2496 evlist__for_each_entry(evlist, evsel) {
2497 if ((evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN) &&
2498 evsel->attr.sample_max_stack == 0)
2499 evsel->attr.sample_max_stack = trace->max_stack;
2500 }
2501again:
2502 before = trace->nr_events;
2503
2504 for (i = 0; i < evlist->nr_mmaps; i++) {
2505 union perf_event *event;
2506 struct perf_mmap *md;
2507
2508 md = &evlist->mmap[i];
2509 if (perf_mmap__read_init(md) < 0)
2510 continue;
2511
2512 while ((event = perf_mmap__read_event(md)) != NULL) {
2513 struct perf_sample sample;
2514
2515 ++trace->nr_events;
2516
2517 err = perf_evlist__parse_sample(evlist, event, &sample);
2518 if (err) {
2519 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
2520 goto next_event;
2521 }
2522
2523 trace__handle_event(trace, event, &sample);
2524next_event:
2525 perf_mmap__consume(md);
2526
2527 if (interrupted)
2528 goto out_disable;
2529
2530 if (done && !draining) {
2531 perf_evlist__disable(evlist);
2532 draining = true;
2533 }
2534 }
2535 perf_mmap__read_done(md);
2536 }
2537
2538 if (trace->nr_events == before) {
2539 int timeout = done ? 100 : -1;
2540
2541 if (!draining && perf_evlist__poll(evlist, timeout) > 0) {
2542 if (perf_evlist__filter_pollfd(evlist, POLLERR | POLLHUP) == 0)
2543 draining = true;
2544
2545 goto again;
2546 }
2547 } else {
2548 goto again;
2549 }
2550
2551out_disable:
2552 thread__zput(trace->current);
2553
2554 perf_evlist__disable(evlist);
2555
2556 if (!err) {
2557 if (trace->summary)
2558 trace__fprintf_thread_summary(trace, trace->output);
2559
2560 if (trace->show_tool_stats) {
2561 fprintf(trace->output, "Stats:\n "
2562 " vfs_getname : %" PRIu64 "\n"
2563 " proc_getname: %" PRIu64 "\n",
2564 trace->stats.vfs_getname,
2565 trace->stats.proc_getname);
2566 }
2567 }
2568
2569out_delete_evlist:
2570 trace__symbols__exit(trace);
2571
2572 perf_evlist__delete(evlist);
2573 cgroup__put(trace->cgroup);
2574 trace->evlist = NULL;
2575 trace->live = false;
2576 return err;
2577{
2578 char errbuf[BUFSIZ];
2579
2580out_error_sched_stat_runtime:
2581 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
2582 goto out_error;
2583
2584out_error_raw_syscalls:
2585 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
2586 goto out_error;
2587
2588out_error_mmap:
2589 perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
2590 goto out_error;
2591
2592out_error_open:
2593 perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
2594
2595out_error:
2596 fprintf(trace->output, "%s\n", errbuf);
2597 goto out_delete_evlist;
2598
2599out_error_apply_filters:
2600 fprintf(trace->output,
2601 "Failed to set filter \"%s\" on event %s with %d (%s)\n",
2602 evsel->filter, perf_evsel__name(evsel), errno,
2603 str_error_r(errno, errbuf, sizeof(errbuf)));
2604 goto out_delete_evlist;
2605}
2606out_error_mem:
2607 fprintf(trace->output, "Not enough memory to run!\n");
2608 goto out_delete_evlist;
2609
2610out_errno:
2611 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
2612 goto out_delete_evlist;
2613}
2614
2615static int trace__replay(struct trace *trace)
2616{
2617 const struct perf_evsel_str_handler handlers[] = {
2618 { "probe:vfs_getname", trace__vfs_getname, },
2619 };
2620 struct perf_data data = {
2621 .file = {
2622 .path = input_name,
2623 },
2624 .mode = PERF_DATA_MODE_READ,
2625 .force = trace->force,
2626 };
2627 struct perf_session *session;
2628 struct perf_evsel *evsel;
2629 int err = -1;
2630
2631 trace->tool.sample = trace__process_sample;
2632 trace->tool.mmap = perf_event__process_mmap;
2633 trace->tool.mmap2 = perf_event__process_mmap2;
2634 trace->tool.comm = perf_event__process_comm;
2635 trace->tool.exit = perf_event__process_exit;
2636 trace->tool.fork = perf_event__process_fork;
2637 trace->tool.attr = perf_event__process_attr;
2638 trace->tool.tracing_data = perf_event__process_tracing_data;
2639 trace->tool.build_id = perf_event__process_build_id;
2640 trace->tool.namespaces = perf_event__process_namespaces;
2641
2642 trace->tool.ordered_events = true;
2643 trace->tool.ordering_requires_timestamps = true;
2644
2645 /* add tid to output */
2646 trace->multiple_threads = true;
2647
2648 session = perf_session__new(&data, false, &trace->tool);
2649 if (session == NULL)
2650 return -1;
2651
2652 if (trace->opts.target.pid)
2653 symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
2654
2655 if (trace->opts.target.tid)
2656 symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
2657
2658 if (symbol__init(&session->header.env) < 0)
2659 goto out;
2660
2661 trace->host = &session->machines.host;
2662
2663 err = perf_session__set_tracepoints_handlers(session, handlers);
2664 if (err)
2665 goto out;
2666
2667 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
2668 "raw_syscalls:sys_enter");
2669 /* older kernels have syscalls tp versus raw_syscalls */
2670 if (evsel == NULL)
2671 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
2672 "syscalls:sys_enter");
2673
2674 if (evsel &&
2675 (perf_evsel__init_syscall_tp(evsel, trace__sys_enter) < 0 ||
2676 perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
2677 pr_err("Error during initialize raw_syscalls:sys_enter event\n");
2678 goto out;
2679 }
2680
2681 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
2682 "raw_syscalls:sys_exit");
2683 if (evsel == NULL)
2684 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
2685 "syscalls:sys_exit");
2686 if (evsel &&
2687 (perf_evsel__init_syscall_tp(evsel, trace__sys_exit) < 0 ||
2688 perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
2689 pr_err("Error during initialize raw_syscalls:sys_exit event\n");
2690 goto out;
2691 }
2692
2693 evlist__for_each_entry(session->evlist, evsel) {
2694 if (evsel->attr.type == PERF_TYPE_SOFTWARE &&
2695 (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
2696 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
2697 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS))
2698 evsel->handler = trace__pgfault;
2699 }
2700
2701 setup_pager();
2702
2703 err = perf_session__process_events(session);
2704 if (err)
2705 pr_err("Failed to process events, error %d", err);
2706
2707 else if (trace->summary)
2708 trace__fprintf_thread_summary(trace, trace->output);
2709
2710out:
2711 perf_session__delete(session);
2712
2713 return err;
2714}
2715
2716static size_t trace__fprintf_threads_header(FILE *fp)
2717{
2718 size_t printed;
2719
2720 printed = fprintf(fp, "\n Summary of events:\n\n");
2721
2722 return printed;
2723}
2724
2725DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
2726 struct stats *stats;
2727 double msecs;
2728 int syscall;
2729)
2730{
2731 struct int_node *source = rb_entry(nd, struct int_node, rb_node);
2732 struct stats *stats = source->priv;
2733
2734 entry->syscall = source->i;
2735 entry->stats = stats;
2736 entry->msecs = stats ? (u64)stats->n * (avg_stats(stats) / NSEC_PER_MSEC) : 0;
2737}
2738
2739static size_t thread__dump_stats(struct thread_trace *ttrace,
2740 struct trace *trace, FILE *fp)
2741{
2742 size_t printed = 0;
2743 struct syscall *sc;
2744 struct rb_node *nd;
2745 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
2746
2747 if (syscall_stats == NULL)
2748 return 0;
2749
2750 printed += fprintf(fp, "\n");
2751
2752 printed += fprintf(fp, " syscall calls total min avg max stddev\n");
2753 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
2754 printed += fprintf(fp, " --------------- -------- --------- --------- --------- --------- ------\n");
2755
2756 resort_rb__for_each_entry(nd, syscall_stats) {
2757 struct stats *stats = syscall_stats_entry->stats;
2758 if (stats) {
2759 double min = (double)(stats->min) / NSEC_PER_MSEC;
2760 double max = (double)(stats->max) / NSEC_PER_MSEC;
2761 double avg = avg_stats(stats);
2762 double pct;
2763 u64 n = (u64) stats->n;
2764
2765 pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0;
2766 avg /= NSEC_PER_MSEC;
2767
2768 sc = &trace->syscalls.table[syscall_stats_entry->syscall];
2769 printed += fprintf(fp, " %-15s", sc->name);
2770 printed += fprintf(fp, " %8" PRIu64 " %9.3f %9.3f %9.3f",
2771 n, syscall_stats_entry->msecs, min, avg);
2772 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
2773 }
2774 }
2775
2776 resort_rb__delete(syscall_stats);
2777 printed += fprintf(fp, "\n\n");
2778
2779 return printed;
2780}
2781
2782static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
2783{
2784 size_t printed = 0;
2785 struct thread_trace *ttrace = thread__priv(thread);
2786 double ratio;
2787
2788 if (ttrace == NULL)
2789 return 0;
2790
2791 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
2792
2793 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
2794 printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
2795 printed += fprintf(fp, "%.1f%%", ratio);
2796 if (ttrace->pfmaj)
2797 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
2798 if (ttrace->pfmin)
2799 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
2800 if (trace->sched)
2801 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
2802 else if (fputc('\n', fp) != EOF)
2803 ++printed;
2804
2805 printed += thread__dump_stats(ttrace, trace, fp);
2806
2807 return printed;
2808}
2809
2810static unsigned long thread__nr_events(struct thread_trace *ttrace)
2811{
2812 return ttrace ? ttrace->nr_events : 0;
2813}
2814
2815DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
2816 struct thread *thread;
2817)
2818{
2819 entry->thread = rb_entry(nd, struct thread, rb_node);
2820}
2821
2822static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
2823{
2824 size_t printed = trace__fprintf_threads_header(fp);
2825 struct rb_node *nd;
2826 int i;
2827
2828 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
2829 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
2830
2831 if (threads == NULL) {
2832 fprintf(fp, "%s", "Error sorting output by nr_events!\n");
2833 return 0;
2834 }
2835
2836 resort_rb__for_each_entry(nd, threads)
2837 printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
2838
2839 resort_rb__delete(threads);
2840 }
2841 return printed;
2842}
2843
2844static int trace__set_duration(const struct option *opt, const char *str,
2845 int unset __maybe_unused)
2846{
2847 struct trace *trace = opt->value;
2848
2849 trace->duration_filter = atof(str);
2850 return 0;
2851}
2852
2853static int trace__set_filter_pids(const struct option *opt, const char *str,
2854 int unset __maybe_unused)
2855{
2856 int ret = -1;
2857 size_t i;
2858 struct trace *trace = opt->value;
2859 /*
2860 * FIXME: introduce a intarray class, plain parse csv and create a
2861 * { int nr, int entries[] } struct...
2862 */
2863 struct intlist *list = intlist__new(str);
2864
2865 if (list == NULL)
2866 return -1;
2867
2868 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
2869 trace->filter_pids.entries = calloc(i, sizeof(pid_t));
2870
2871 if (trace->filter_pids.entries == NULL)
2872 goto out;
2873
2874 trace->filter_pids.entries[0] = getpid();
2875
2876 for (i = 1; i < trace->filter_pids.nr; ++i)
2877 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
2878
2879 intlist__delete(list);
2880 ret = 0;
2881out:
2882 return ret;
2883}
2884
2885static int trace__open_output(struct trace *trace, const char *filename)
2886{
2887 struct stat st;
2888
2889 if (!stat(filename, &st) && st.st_size) {
2890 char oldname[PATH_MAX];
2891
2892 scnprintf(oldname, sizeof(oldname), "%s.old", filename);
2893 unlink(oldname);
2894 rename(filename, oldname);
2895 }
2896
2897 trace->output = fopen(filename, "w");
2898
2899 return trace->output == NULL ? -errno : 0;
2900}
2901
2902static int parse_pagefaults(const struct option *opt, const char *str,
2903 int unset __maybe_unused)
2904{
2905 int *trace_pgfaults = opt->value;
2906
2907 if (strcmp(str, "all") == 0)
2908 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
2909 else if (strcmp(str, "maj") == 0)
2910 *trace_pgfaults |= TRACE_PFMAJ;
2911 else if (strcmp(str, "min") == 0)
2912 *trace_pgfaults |= TRACE_PFMIN;
2913 else
2914 return -1;
2915
2916 return 0;
2917}
2918
2919static void evlist__set_evsel_handler(struct perf_evlist *evlist, void *handler)
2920{
2921 struct perf_evsel *evsel;
2922
2923 evlist__for_each_entry(evlist, evsel)
2924 evsel->handler = handler;
2925}
2926
2927/*
2928 * XXX: Hackish, just splitting the combined -e+--event (syscalls
2929 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
2930 * existing facilities unchanged (trace->ev_qualifier + parse_options()).
2931 *
2932 * It'd be better to introduce a parse_options() variant that would return a
2933 * list with the terms it didn't match to an event...
2934 */
2935static int trace__parse_events_option(const struct option *opt, const char *str,
2936 int unset __maybe_unused)
2937{
2938 struct trace *trace = (struct trace *)opt->value;
2939 const char *s = str;
2940 char *sep = NULL, *lists[2] = { NULL, NULL, };
2941 int len = strlen(str) + 1, err = -1, list, idx;
2942 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
2943 char group_name[PATH_MAX];
2944
2945 if (strace_groups_dir == NULL)
2946 return -1;
2947
2948 if (*s == '!') {
2949 ++s;
2950 trace->not_ev_qualifier = true;
2951 }
2952
2953 while (1) {
2954 if ((sep = strchr(s, ',')) != NULL)
2955 *sep = '\0';
2956
2957 list = 0;
2958 if (syscalltbl__id(trace->sctbl, s) >= 0 ||
2959 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
2960 list = 1;
2961 } else {
2962 path__join(group_name, sizeof(group_name), strace_groups_dir, s);
2963 if (access(group_name, R_OK) == 0)
2964 list = 1;
2965 }
2966
2967 if (lists[list]) {
2968 sprintf(lists[list] + strlen(lists[list]), ",%s", s);
2969 } else {
2970 lists[list] = malloc(len);
2971 if (lists[list] == NULL)
2972 goto out;
2973 strcpy(lists[list], s);
2974 }
2975
2976 if (!sep)
2977 break;
2978
2979 *sep = ',';
2980 s = sep + 1;
2981 }
2982
2983 if (lists[1] != NULL) {
2984 struct strlist_config slist_config = {
2985 .dirname = strace_groups_dir,
2986 };
2987
2988 trace->ev_qualifier = strlist__new(lists[1], &slist_config);
2989 if (trace->ev_qualifier == NULL) {
2990 fputs("Not enough memory to parse event qualifier", trace->output);
2991 goto out;
2992 }
2993
2994 if (trace__validate_ev_qualifier(trace))
2995 goto out;
2996 }
2997
2998 err = 0;
2999
3000 if (lists[0]) {
3001 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
3002 "event selector. use 'perf list' to list available events",
3003 parse_events_option);
3004 err = parse_events_option(&o, lists[0], 0);
3005 }
3006out:
3007 if (sep)
3008 *sep = ',';
3009
3010 return err;
3011}
3012
3013static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
3014{
3015 struct trace *trace = opt->value;
3016
3017 if (!list_empty(&trace->evlist->entries))
3018 return parse_cgroups(opt, str, unset);
3019
3020 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
3021
3022 return 0;
3023}
3024
3025int cmd_trace(int argc, const char **argv)
3026{
3027 const char *trace_usage[] = {
3028 "perf trace [<options>] [<command>]",
3029 "perf trace [<options>] -- <command> [<options>]",
3030 "perf trace record [<options>] [<command>]",
3031 "perf trace record [<options>] -- <command> [<options>]",
3032 NULL
3033 };
3034 struct trace trace = {
3035 .syscalls = {
3036 . max = -1,
3037 },
3038 .opts = {
3039 .target = {
3040 .uid = UINT_MAX,
3041 .uses_mmap = true,
3042 },
3043 .user_freq = UINT_MAX,
3044 .user_interval = ULLONG_MAX,
3045 .no_buffering = true,
3046 .mmap_pages = UINT_MAX,
3047 .proc_map_timeout = 500,
3048 },
3049 .output = stderr,
3050 .show_comm = true,
3051 .trace_syscalls = true,
3052 .kernel_syscallchains = false,
3053 .max_stack = UINT_MAX,
3054 };
3055 const char *output_name = NULL;
3056 const struct option trace_options[] = {
3057 OPT_CALLBACK('e', "event", &trace, "event",
3058 "event/syscall selector. use 'perf list' to list available events",
3059 trace__parse_events_option),
3060 OPT_BOOLEAN(0, "comm", &trace.show_comm,
3061 "show the thread COMM next to its id"),
3062 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
3063 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
3064 trace__parse_events_option),
3065 OPT_STRING('o', "output", &output_name, "file", "output file name"),
3066 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
3067 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
3068 "trace events on existing process id"),
3069 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
3070 "trace events on existing thread id"),
3071 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
3072 "pids to filter (by the kernel)", trace__set_filter_pids),
3073 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
3074 "system-wide collection from all CPUs"),
3075 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
3076 "list of cpus to monitor"),
3077 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
3078 "child tasks do not inherit counters"),
3079 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
3080 "number of mmap data pages",
3081 perf_evlist__parse_mmap_pages),
3082 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
3083 "user to profile"),
3084 OPT_CALLBACK(0, "duration", &trace, "float",
3085 "show only events with duration > N.M ms",
3086 trace__set_duration),
3087 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
3088 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
3089 OPT_BOOLEAN('T', "time", &trace.full_time,
3090 "Show full timestamp, not time relative to first start"),
3091 OPT_BOOLEAN(0, "failure", &trace.failure_only,
3092 "Show only syscalls that failed"),
3093 OPT_BOOLEAN('s', "summary", &trace.summary_only,
3094 "Show only syscall summary with statistics"),
3095 OPT_BOOLEAN('S', "with-summary", &trace.summary,
3096 "Show all syscalls and summary with statistics"),
3097 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
3098 "Trace pagefaults", parse_pagefaults, "maj"),
3099 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
3100 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
3101 OPT_CALLBACK(0, "call-graph", &trace.opts,
3102 "record_mode[,record_size]", record_callchain_help,
3103 &record_parse_callchain_opt),
3104 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
3105 "Show the kernel callchains on the syscall exit path"),
3106 OPT_UINTEGER(0, "min-stack", &trace.min_stack,
3107 "Set the minimum stack depth when parsing the callchain, "
3108 "anything below the specified depth will be ignored."),
3109 OPT_UINTEGER(0, "max-stack", &trace.max_stack,
3110 "Set the maximum stack depth when parsing the callchain, "
3111 "anything beyond the specified depth will be ignored. "
3112 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
3113 OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
3114 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
3115 OPT_UINTEGER(0, "proc-map-timeout", &trace.opts.proc_map_timeout,
3116 "per thread proc mmap processing timeout in ms"),
3117 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
3118 trace__parse_cgroups),
3119 OPT_UINTEGER('D', "delay", &trace.opts.initial_delay,
3120 "ms to wait before starting measurement after program "
3121 "start"),
3122 OPT_END()
3123 };
3124 bool __maybe_unused max_stack_user_set = true;
3125 bool mmap_pages_user_set = true;
3126 const char * const trace_subcommands[] = { "record", NULL };
3127 int err;
3128 char bf[BUFSIZ];
3129
3130 signal(SIGSEGV, sighandler_dump_stack);
3131 signal(SIGFPE, sighandler_dump_stack);
3132
3133 trace.evlist = perf_evlist__new();
3134 trace.sctbl = syscalltbl__new();
3135
3136 if (trace.evlist == NULL || trace.sctbl == NULL) {
3137 pr_err("Not enough memory to run!\n");
3138 err = -ENOMEM;
3139 goto out;
3140 }
3141
3142 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
3143 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
3144
3145 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
3146 usage_with_options_msg(trace_usage, trace_options,
3147 "cgroup monitoring only available in system-wide mode");
3148 }
3149
3150 err = bpf__setup_stdout(trace.evlist);
3151 if (err) {
3152 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
3153 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
3154 goto out;
3155 }
3156
3157 err = -1;
3158
3159 if (trace.trace_pgfaults) {
3160 trace.opts.sample_address = true;
3161 trace.opts.sample_time = true;
3162 }
3163
3164 if (trace.opts.mmap_pages == UINT_MAX)
3165 mmap_pages_user_set = false;
3166
3167 if (trace.max_stack == UINT_MAX) {
3168 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl_perf_event_max_stack;
3169 max_stack_user_set = false;
3170 }
3171
3172#ifdef HAVE_DWARF_UNWIND_SUPPORT
3173 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
3174 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
3175 }
3176#endif
3177
3178 if (callchain_param.enabled) {
3179 if (!mmap_pages_user_set && geteuid() == 0)
3180 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
3181
3182 symbol_conf.use_callchain = true;
3183 }
3184
3185 if (trace.evlist->nr_entries > 0)
3186 evlist__set_evsel_handler(trace.evlist, trace__event_handler);
3187
3188 if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
3189 return trace__record(&trace, argc-1, &argv[1]);
3190
3191 /* summary_only implies summary option, but don't overwrite summary if set */
3192 if (trace.summary_only)
3193 trace.summary = trace.summary_only;
3194
3195 if (!trace.trace_syscalls && !trace.trace_pgfaults &&
3196 trace.evlist->nr_entries == 0 /* Was --events used? */) {
3197 pr_err("Please specify something to trace.\n");
3198 return -1;
3199 }
3200
3201 if (!trace.trace_syscalls && trace.ev_qualifier) {
3202 pr_err("The -e option can't be used with --no-syscalls.\n");
3203 goto out;
3204 }
3205
3206 if (output_name != NULL) {
3207 err = trace__open_output(&trace, output_name);
3208 if (err < 0) {
3209 perror("failed to create output file");
3210 goto out;
3211 }
3212 }
3213
3214 trace.open_id = syscalltbl__id(trace.sctbl, "open");
3215
3216 err = target__validate(&trace.opts.target);
3217 if (err) {
3218 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
3219 fprintf(trace.output, "%s", bf);
3220 goto out_close;
3221 }
3222
3223 err = target__parse_uid(&trace.opts.target);
3224 if (err) {
3225 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
3226 fprintf(trace.output, "%s", bf);
3227 goto out_close;
3228 }
3229
3230 if (!argc && target__none(&trace.opts.target))
3231 trace.opts.target.system_wide = true;
3232
3233 if (input_name)
3234 err = trace__replay(&trace);
3235 else
3236 err = trace__run(&trace, argc, argv);
3237
3238out_close:
3239 if (output_name != NULL)
3240 fclose(trace.output);
3241out:
3242 return err;
3243}
1/*
2 * builtin-trace.c
3 *
4 * Builtin 'trace' command:
5 *
6 * Display a continuously updated trace of any workload, CPU, specific PID,
7 * system wide, etc. Default format is loosely strace like, but any other
8 * event may be specified using --event.
9 *
10 * Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
11 *
12 * Initially based on the 'trace' prototype by Thomas Gleixner:
13 *
14 * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'")
15 */
16
17#include "util/record.h"
18#include <traceevent/event-parse.h>
19#include <api/fs/tracing_path.h>
20#include <bpf/bpf.h>
21#include "util/bpf_map.h"
22#include "util/rlimit.h"
23#include "builtin.h"
24#include "util/cgroup.h"
25#include "util/color.h"
26#include "util/config.h"
27#include "util/debug.h"
28#include "util/dso.h"
29#include "util/env.h"
30#include "util/event.h"
31#include "util/evsel.h"
32#include "util/evsel_fprintf.h"
33#include "util/synthetic-events.h"
34#include "util/evlist.h"
35#include "util/evswitch.h"
36#include "util/mmap.h"
37#include <subcmd/pager.h>
38#include <subcmd/exec-cmd.h>
39#include "util/machine.h"
40#include "util/map.h"
41#include "util/symbol.h"
42#include "util/path.h"
43#include "util/session.h"
44#include "util/thread.h"
45#include <subcmd/parse-options.h>
46#include "util/strlist.h"
47#include "util/intlist.h"
48#include "util/thread_map.h"
49#include "util/stat.h"
50#include "util/tool.h"
51#include "util/util.h"
52#include "trace/beauty/beauty.h"
53#include "trace-event.h"
54#include "util/parse-events.h"
55#include "util/bpf-loader.h"
56#include "callchain.h"
57#include "print_binary.h"
58#include "string2.h"
59#include "syscalltbl.h"
60#include "rb_resort.h"
61#include "../perf.h"
62
63#include <errno.h>
64#include <inttypes.h>
65#include <poll.h>
66#include <signal.h>
67#include <stdlib.h>
68#include <string.h>
69#include <linux/err.h>
70#include <linux/filter.h>
71#include <linux/kernel.h>
72#include <linux/random.h>
73#include <linux/stringify.h>
74#include <linux/time64.h>
75#include <linux/zalloc.h>
76#include <fcntl.h>
77#include <sys/sysmacros.h>
78
79#include <linux/ctype.h>
80#include <perf/mmap.h>
81
82#ifndef O_CLOEXEC
83# define O_CLOEXEC 02000000
84#endif
85
86#ifndef F_LINUX_SPECIFIC_BASE
87# define F_LINUX_SPECIFIC_BASE 1024
88#endif
89
90/*
91 * strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100
92 */
93struct syscall_arg_fmt {
94 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
95 bool (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val);
96 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val);
97 void *parm;
98 const char *name;
99 u16 nr_entries; // for arrays
100 bool show_zero;
101};
102
103struct syscall_fmt {
104 const char *name;
105 const char *alias;
106 struct {
107 const char *sys_enter,
108 *sys_exit;
109 } bpf_prog_name;
110 struct syscall_arg_fmt arg[6];
111 u8 nr_args;
112 bool errpid;
113 bool timeout;
114 bool hexret;
115};
116
117struct trace {
118 struct perf_tool tool;
119 struct syscalltbl *sctbl;
120 struct {
121 struct syscall *table;
122 struct bpf_map *map;
123 struct { // per syscall BPF_MAP_TYPE_PROG_ARRAY
124 struct bpf_map *sys_enter,
125 *sys_exit;
126 } prog_array;
127 struct {
128 struct evsel *sys_enter,
129 *sys_exit,
130 *augmented;
131 } events;
132 struct bpf_program *unaugmented_prog;
133 } syscalls;
134 struct {
135 struct bpf_map *map;
136 } dump;
137 struct record_opts opts;
138 struct evlist *evlist;
139 struct machine *host;
140 struct thread *current;
141 struct bpf_object *bpf_obj;
142 struct cgroup *cgroup;
143 u64 base_time;
144 FILE *output;
145 unsigned long nr_events;
146 unsigned long nr_events_printed;
147 unsigned long max_events;
148 struct evswitch evswitch;
149 struct strlist *ev_qualifier;
150 struct {
151 size_t nr;
152 int *entries;
153 } ev_qualifier_ids;
154 struct {
155 size_t nr;
156 pid_t *entries;
157 struct bpf_map *map;
158 } filter_pids;
159 double duration_filter;
160 double runtime_ms;
161 struct {
162 u64 vfs_getname,
163 proc_getname;
164 } stats;
165 unsigned int max_stack;
166 unsigned int min_stack;
167 int raw_augmented_syscalls_args_size;
168 bool raw_augmented_syscalls;
169 bool fd_path_disabled;
170 bool sort_events;
171 bool not_ev_qualifier;
172 bool live;
173 bool full_time;
174 bool sched;
175 bool multiple_threads;
176 bool summary;
177 bool summary_only;
178 bool errno_summary;
179 bool failure_only;
180 bool show_comm;
181 bool print_sample;
182 bool show_tool_stats;
183 bool trace_syscalls;
184 bool libtraceevent_print;
185 bool kernel_syscallchains;
186 s16 args_alignment;
187 bool show_tstamp;
188 bool show_duration;
189 bool show_zeros;
190 bool show_arg_names;
191 bool show_string_prefix;
192 bool force;
193 bool vfs_getname;
194 int trace_pgfaults;
195 char *perfconfig_events;
196 struct {
197 struct ordered_events data;
198 u64 last;
199 } oe;
200};
201
202struct tp_field {
203 int offset;
204 union {
205 u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
206 void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
207 };
208};
209
210#define TP_UINT_FIELD(bits) \
211static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
212{ \
213 u##bits value; \
214 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
215 return value; \
216}
217
218TP_UINT_FIELD(8);
219TP_UINT_FIELD(16);
220TP_UINT_FIELD(32);
221TP_UINT_FIELD(64);
222
223#define TP_UINT_FIELD__SWAPPED(bits) \
224static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
225{ \
226 u##bits value; \
227 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
228 return bswap_##bits(value);\
229}
230
231TP_UINT_FIELD__SWAPPED(16);
232TP_UINT_FIELD__SWAPPED(32);
233TP_UINT_FIELD__SWAPPED(64);
234
235static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap)
236{
237 field->offset = offset;
238
239 switch (size) {
240 case 1:
241 field->integer = tp_field__u8;
242 break;
243 case 2:
244 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
245 break;
246 case 4:
247 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
248 break;
249 case 8:
250 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
251 break;
252 default:
253 return -1;
254 }
255
256 return 0;
257}
258
259static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap)
260{
261 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap);
262}
263
264static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
265{
266 return sample->raw_data + field->offset;
267}
268
269static int __tp_field__init_ptr(struct tp_field *field, int offset)
270{
271 field->offset = offset;
272 field->pointer = tp_field__ptr;
273 return 0;
274}
275
276static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field)
277{
278 return __tp_field__init_ptr(field, format_field->offset);
279}
280
281struct syscall_tp {
282 struct tp_field id;
283 union {
284 struct tp_field args, ret;
285 };
286};
287
288/*
289 * The evsel->priv as used by 'perf trace'
290 * sc: for raw_syscalls:sys_{enter,exit} and syscalls:sys_{enter,exit}_SYSCALLNAME
291 * fmt: for all the other tracepoints
292 */
293struct evsel_trace {
294 struct syscall_tp sc;
295 struct syscall_arg_fmt *fmt;
296};
297
298static struct evsel_trace *evsel_trace__new(void)
299{
300 return zalloc(sizeof(struct evsel_trace));
301}
302
303static void evsel_trace__delete(struct evsel_trace *et)
304{
305 if (et == NULL)
306 return;
307
308 zfree(&et->fmt);
309 free(et);
310}
311
312/*
313 * Used with raw_syscalls:sys_{enter,exit} and with the
314 * syscalls:sys_{enter,exit}_SYSCALL tracepoints
315 */
316static inline struct syscall_tp *__evsel__syscall_tp(struct evsel *evsel)
317{
318 struct evsel_trace *et = evsel->priv;
319
320 return &et->sc;
321}
322
323static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel)
324{
325 if (evsel->priv == NULL) {
326 evsel->priv = evsel_trace__new();
327 if (evsel->priv == NULL)
328 return NULL;
329 }
330
331 return __evsel__syscall_tp(evsel);
332}
333
334/*
335 * Used with all the other tracepoints.
336 */
337static inline struct syscall_arg_fmt *__evsel__syscall_arg_fmt(struct evsel *evsel)
338{
339 struct evsel_trace *et = evsel->priv;
340
341 return et->fmt;
342}
343
344static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel)
345{
346 struct evsel_trace *et = evsel->priv;
347
348 if (evsel->priv == NULL) {
349 et = evsel->priv = evsel_trace__new();
350
351 if (et == NULL)
352 return NULL;
353 }
354
355 if (et->fmt == NULL) {
356 et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt));
357 if (et->fmt == NULL)
358 goto out_delete;
359 }
360
361 return __evsel__syscall_arg_fmt(evsel);
362
363out_delete:
364 evsel_trace__delete(evsel->priv);
365 evsel->priv = NULL;
366 return NULL;
367}
368
369static int evsel__init_tp_uint_field(struct evsel *evsel, struct tp_field *field, const char *name)
370{
371 struct tep_format_field *format_field = evsel__field(evsel, name);
372
373 if (format_field == NULL)
374 return -1;
375
376 return tp_field__init_uint(field, format_field, evsel->needs_swap);
377}
378
379#define perf_evsel__init_sc_tp_uint_field(evsel, name) \
380 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
381 evsel__init_tp_uint_field(evsel, &sc->name, #name); })
382
383static int evsel__init_tp_ptr_field(struct evsel *evsel, struct tp_field *field, const char *name)
384{
385 struct tep_format_field *format_field = evsel__field(evsel, name);
386
387 if (format_field == NULL)
388 return -1;
389
390 return tp_field__init_ptr(field, format_field);
391}
392
393#define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
394 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
395 evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
396
397static void evsel__delete_priv(struct evsel *evsel)
398{
399 zfree(&evsel->priv);
400 evsel__delete(evsel);
401}
402
403static int evsel__init_syscall_tp(struct evsel *evsel)
404{
405 struct syscall_tp *sc = evsel__syscall_tp(evsel);
406
407 if (sc != NULL) {
408 if (evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") &&
409 evsel__init_tp_uint_field(evsel, &sc->id, "nr"))
410 return -ENOENT;
411 return 0;
412 }
413
414 return -ENOMEM;
415}
416
417static int evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp)
418{
419 struct syscall_tp *sc = evsel__syscall_tp(evsel);
420
421 if (sc != NULL) {
422 struct tep_format_field *syscall_id = evsel__field(tp, "id");
423 if (syscall_id == NULL)
424 syscall_id = evsel__field(tp, "__syscall_nr");
425 if (syscall_id == NULL ||
426 __tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap))
427 return -EINVAL;
428
429 return 0;
430 }
431
432 return -ENOMEM;
433}
434
435static int evsel__init_augmented_syscall_tp_args(struct evsel *evsel)
436{
437 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
438
439 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64));
440}
441
442static int evsel__init_augmented_syscall_tp_ret(struct evsel *evsel)
443{
444 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
445
446 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap);
447}
448
449static int evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler)
450{
451 if (evsel__syscall_tp(evsel) != NULL) {
452 if (perf_evsel__init_sc_tp_uint_field(evsel, id))
453 return -ENOENT;
454
455 evsel->handler = handler;
456 return 0;
457 }
458
459 return -ENOMEM;
460}
461
462static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
463{
464 struct evsel *evsel = evsel__newtp("raw_syscalls", direction);
465
466 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
467 if (IS_ERR(evsel))
468 evsel = evsel__newtp("syscalls", direction);
469
470 if (IS_ERR(evsel))
471 return NULL;
472
473 if (evsel__init_raw_syscall_tp(evsel, handler))
474 goto out_delete;
475
476 return evsel;
477
478out_delete:
479 evsel__delete_priv(evsel);
480 return NULL;
481}
482
483#define perf_evsel__sc_tp_uint(evsel, name, sample) \
484 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
485 fields->name.integer(&fields->name, sample); })
486
487#define perf_evsel__sc_tp_ptr(evsel, name, sample) \
488 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
489 fields->name.pointer(&fields->name, sample); })
490
491size_t strarray__scnprintf_suffix(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_suffix, int val)
492{
493 int idx = val - sa->offset;
494
495 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
496 size_t printed = scnprintf(bf, size, intfmt, val);
497 if (show_suffix)
498 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
499 return printed;
500 }
501
502 return scnprintf(bf, size, "%s%s", sa->entries[idx], show_suffix ? sa->prefix : "");
503}
504
505size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
506{
507 int idx = val - sa->offset;
508
509 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
510 size_t printed = scnprintf(bf, size, intfmt, val);
511 if (show_prefix)
512 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
513 return printed;
514 }
515
516 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
517}
518
519static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
520 const char *intfmt,
521 struct syscall_arg *arg)
522{
523 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val);
524}
525
526static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
527 struct syscall_arg *arg)
528{
529 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
530}
531
532#define SCA_STRARRAY syscall_arg__scnprintf_strarray
533
534bool syscall_arg__strtoul_strarray(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
535{
536 return strarray__strtoul(arg->parm, bf, size, ret);
537}
538
539bool syscall_arg__strtoul_strarray_flags(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
540{
541 return strarray__strtoul_flags(arg->parm, bf, size, ret);
542}
543
544bool syscall_arg__strtoul_strarrays(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
545{
546 return strarrays__strtoul(arg->parm, bf, size, ret);
547}
548
549size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg)
550{
551 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val);
552}
553
554size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
555{
556 size_t printed;
557 int i;
558
559 for (i = 0; i < sas->nr_entries; ++i) {
560 struct strarray *sa = sas->entries[i];
561 int idx = val - sa->offset;
562
563 if (idx >= 0 && idx < sa->nr_entries) {
564 if (sa->entries[idx] == NULL)
565 break;
566 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
567 }
568 }
569
570 printed = scnprintf(bf, size, intfmt, val);
571 if (show_prefix)
572 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix);
573 return printed;
574}
575
576bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret)
577{
578 int i;
579
580 for (i = 0; i < sa->nr_entries; ++i) {
581 if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') {
582 *ret = sa->offset + i;
583 return true;
584 }
585 }
586
587 return false;
588}
589
590bool strarray__strtoul_flags(struct strarray *sa, char *bf, size_t size, u64 *ret)
591{
592 u64 val = 0;
593 char *tok = bf, *sep, *end;
594
595 *ret = 0;
596
597 while (size != 0) {
598 int toklen = size;
599
600 sep = memchr(tok, '|', size);
601 if (sep != NULL) {
602 size -= sep - tok + 1;
603
604 end = sep - 1;
605 while (end > tok && isspace(*end))
606 --end;
607
608 toklen = end - tok + 1;
609 }
610
611 while (isspace(*tok))
612 ++tok;
613
614 if (isalpha(*tok) || *tok == '_') {
615 if (!strarray__strtoul(sa, tok, toklen, &val))
616 return false;
617 } else {
618 bool is_hexa = tok[0] == 0 && (tok[1] = 'x' || tok[1] == 'X');
619
620 val = strtoul(tok, NULL, is_hexa ? 16 : 0);
621 }
622
623 *ret |= (1 << (val - 1));
624
625 if (sep == NULL)
626 break;
627 tok = sep + 1;
628 }
629
630 return true;
631}
632
633bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret)
634{
635 int i;
636
637 for (i = 0; i < sas->nr_entries; ++i) {
638 struct strarray *sa = sas->entries[i];
639
640 if (strarray__strtoul(sa, bf, size, ret))
641 return true;
642 }
643
644 return false;
645}
646
647size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
648 struct syscall_arg *arg)
649{
650 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val);
651}
652
653#ifndef AT_FDCWD
654#define AT_FDCWD -100
655#endif
656
657static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
658 struct syscall_arg *arg)
659{
660 int fd = arg->val;
661 const char *prefix = "AT_FD";
662
663 if (fd == AT_FDCWD)
664 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD");
665
666 return syscall_arg__scnprintf_fd(bf, size, arg);
667}
668
669#define SCA_FDAT syscall_arg__scnprintf_fd_at
670
671static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
672 struct syscall_arg *arg);
673
674#define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
675
676size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
677{
678 return scnprintf(bf, size, "%#lx", arg->val);
679}
680
681size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg)
682{
683 if (arg->val == 0)
684 return scnprintf(bf, size, "NULL");
685 return syscall_arg__scnprintf_hex(bf, size, arg);
686}
687
688size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
689{
690 return scnprintf(bf, size, "%d", arg->val);
691}
692
693size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
694{
695 return scnprintf(bf, size, "%ld", arg->val);
696}
697
698static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg)
699{
700 // XXX Hey, maybe for sched:sched_switch prev/next comm fields we can
701 // fill missing comms using thread__set_comm()...
702 // here or in a special syscall_arg__scnprintf_pid_sched_tp...
703 return scnprintf(bf, size, "\"%-.*s\"", arg->fmt->nr_entries ?: arg->len, arg->val);
704}
705
706#define SCA_CHAR_ARRAY syscall_arg__scnprintf_char_array
707
708static const char *bpf_cmd[] = {
709 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
710 "MAP_GET_NEXT_KEY", "PROG_LOAD",
711};
712static DEFINE_STRARRAY(bpf_cmd, "BPF_");
713
714static const char *fsmount_flags[] = {
715 [1] = "CLOEXEC",
716};
717static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_");
718
719#include "trace/beauty/generated/fsconfig_arrays.c"
720
721static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_");
722
723static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
724static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1);
725
726static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
727static DEFINE_STRARRAY(itimers, "ITIMER_");
728
729static const char *keyctl_options[] = {
730 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
731 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
732 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
733 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
734 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
735};
736static DEFINE_STRARRAY(keyctl_options, "KEYCTL_");
737
738static const char *whences[] = { "SET", "CUR", "END",
739#ifdef SEEK_DATA
740"DATA",
741#endif
742#ifdef SEEK_HOLE
743"HOLE",
744#endif
745};
746static DEFINE_STRARRAY(whences, "SEEK_");
747
748static const char *fcntl_cmds[] = {
749 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
750 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
751 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
752 "GETOWNER_UIDS",
753};
754static DEFINE_STRARRAY(fcntl_cmds, "F_");
755
756static const char *fcntl_linux_specific_cmds[] = {
757 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
758 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
759 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
760};
761
762static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE);
763
764static struct strarray *fcntl_cmds_arrays[] = {
765 &strarray__fcntl_cmds,
766 &strarray__fcntl_linux_specific_cmds,
767};
768
769static DEFINE_STRARRAYS(fcntl_cmds_arrays);
770
771static const char *rlimit_resources[] = {
772 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
773 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
774 "RTTIME",
775};
776static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_");
777
778static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
779static DEFINE_STRARRAY(sighow, "SIG_");
780
781static const char *clockid[] = {
782 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
783 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
784 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
785};
786static DEFINE_STRARRAY(clockid, "CLOCK_");
787
788static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
789 struct syscall_arg *arg)
790{
791 bool show_prefix = arg->show_string_prefix;
792 const char *suffix = "_OK";
793 size_t printed = 0;
794 int mode = arg->val;
795
796 if (mode == F_OK) /* 0 */
797 return scnprintf(bf, size, "F%s", show_prefix ? suffix : "");
798#define P_MODE(n) \
799 if (mode & n##_OK) { \
800 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \
801 mode &= ~n##_OK; \
802 }
803
804 P_MODE(R);
805 P_MODE(W);
806 P_MODE(X);
807#undef P_MODE
808
809 if (mode)
810 printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
811
812 return printed;
813}
814
815#define SCA_ACCMODE syscall_arg__scnprintf_access_mode
816
817static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
818 struct syscall_arg *arg);
819
820#define SCA_FILENAME syscall_arg__scnprintf_filename
821
822static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
823 struct syscall_arg *arg)
824{
825 bool show_prefix = arg->show_string_prefix;
826 const char *prefix = "O_";
827 int printed = 0, flags = arg->val;
828
829#define P_FLAG(n) \
830 if (flags & O_##n) { \
831 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
832 flags &= ~O_##n; \
833 }
834
835 P_FLAG(CLOEXEC);
836 P_FLAG(NONBLOCK);
837#undef P_FLAG
838
839 if (flags)
840 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
841
842 return printed;
843}
844
845#define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
846
847#ifndef GRND_NONBLOCK
848#define GRND_NONBLOCK 0x0001
849#endif
850#ifndef GRND_RANDOM
851#define GRND_RANDOM 0x0002
852#endif
853
854static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
855 struct syscall_arg *arg)
856{
857 bool show_prefix = arg->show_string_prefix;
858 const char *prefix = "GRND_";
859 int printed = 0, flags = arg->val;
860
861#define P_FLAG(n) \
862 if (flags & GRND_##n) { \
863 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
864 flags &= ~GRND_##n; \
865 }
866
867 P_FLAG(RANDOM);
868 P_FLAG(NONBLOCK);
869#undef P_FLAG
870
871 if (flags)
872 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
873
874 return printed;
875}
876
877#define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
878
879#define STRARRAY(name, array) \
880 { .scnprintf = SCA_STRARRAY, \
881 .strtoul = STUL_STRARRAY, \
882 .parm = &strarray__##array, }
883
884#define STRARRAY_FLAGS(name, array) \
885 { .scnprintf = SCA_STRARRAY_FLAGS, \
886 .strtoul = STUL_STRARRAY_FLAGS, \
887 .parm = &strarray__##array, }
888
889#include "trace/beauty/arch_errno_names.c"
890#include "trace/beauty/eventfd.c"
891#include "trace/beauty/futex_op.c"
892#include "trace/beauty/futex_val3.c"
893#include "trace/beauty/mmap.c"
894#include "trace/beauty/mode_t.c"
895#include "trace/beauty/msg_flags.c"
896#include "trace/beauty/open_flags.c"
897#include "trace/beauty/perf_event_open.c"
898#include "trace/beauty/pid.c"
899#include "trace/beauty/sched_policy.c"
900#include "trace/beauty/seccomp.c"
901#include "trace/beauty/signum.c"
902#include "trace/beauty/socket_type.c"
903#include "trace/beauty/waitid_options.c"
904
905static struct syscall_fmt syscall_fmts[] = {
906 { .name = "access",
907 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
908 { .name = "arch_prctl",
909 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ },
910 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, },
911 { .name = "bind",
912 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
913 [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ },
914 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
915 { .name = "bpf",
916 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
917 { .name = "brk", .hexret = true,
918 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, },
919 { .name = "clock_gettime",
920 .arg = { [0] = STRARRAY(clk_id, clockid), }, },
921 { .name = "clone", .errpid = true, .nr_args = 5,
922 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, },
923 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, },
924 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
925 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, },
926 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, },
927 { .name = "close",
928 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
929 { .name = "connect",
930 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
931 [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ },
932 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
933 { .name = "epoll_ctl",
934 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
935 { .name = "eventfd2",
936 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
937 { .name = "fchmodat",
938 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
939 { .name = "fchownat",
940 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
941 { .name = "fcntl",
942 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
943 .strtoul = STUL_STRARRAYS,
944 .parm = &strarrays__fcntl_cmds_arrays,
945 .show_zero = true, },
946 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, },
947 { .name = "flock",
948 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
949 { .name = "fsconfig",
950 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, },
951 { .name = "fsmount",
952 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags),
953 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, },
954 { .name = "fspick",
955 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
956 [1] = { .scnprintf = SCA_FILENAME, /* path */ },
957 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, },
958 { .name = "fstat", .alias = "newfstat", },
959 { .name = "fstatat", .alias = "newfstatat", },
960 { .name = "futex",
961 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
962 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
963 { .name = "futimesat",
964 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
965 { .name = "getitimer",
966 .arg = { [0] = STRARRAY(which, itimers), }, },
967 { .name = "getpid", .errpid = true, },
968 { .name = "getpgid", .errpid = true, },
969 { .name = "getppid", .errpid = true, },
970 { .name = "getrandom",
971 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
972 { .name = "getrlimit",
973 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
974 { .name = "gettid", .errpid = true, },
975 { .name = "ioctl",
976 .arg = {
977#if defined(__i386__) || defined(__x86_64__)
978/*
979 * FIXME: Make this available to all arches.
980 */
981 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
982 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
983#else
984 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
985#endif
986 { .name = "kcmp", .nr_args = 5,
987 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, },
988 [1] = { .name = "pid2", .scnprintf = SCA_PID, },
989 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, },
990 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, },
991 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, },
992 { .name = "keyctl",
993 .arg = { [0] = STRARRAY(option, keyctl_options), }, },
994 { .name = "kill",
995 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
996 { .name = "linkat",
997 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
998 { .name = "lseek",
999 .arg = { [2] = STRARRAY(whence, whences), }, },
1000 { .name = "lstat", .alias = "newlstat", },
1001 { .name = "madvise",
1002 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1003 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
1004 { .name = "mkdirat",
1005 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1006 { .name = "mknodat",
1007 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1008 { .name = "mmap", .hexret = true,
1009/* The standard mmap maps to old_mmap on s390x */
1010#if defined(__s390x__)
1011 .alias = "old_mmap",
1012#endif
1013 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
1014 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */
1015 .strtoul = STUL_STRARRAY_FLAGS,
1016 .parm = &strarray__mmap_flags, },
1017 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, },
1018 { .name = "mount",
1019 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ },
1020 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
1021 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, },
1022 { .name = "move_mount",
1023 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ },
1024 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ },
1025 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ },
1026 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ },
1027 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, },
1028 { .name = "mprotect",
1029 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1030 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, },
1031 { .name = "mq_unlink",
1032 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, },
1033 { .name = "mremap", .hexret = true,
1034 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, },
1035 { .name = "name_to_handle_at",
1036 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1037 { .name = "newfstatat",
1038 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1039 { .name = "open",
1040 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1041 { .name = "open_by_handle_at",
1042 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
1043 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1044 { .name = "openat",
1045 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
1046 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1047 { .name = "perf_event_open",
1048 .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ },
1049 [3] = { .scnprintf = SCA_FD, /* group_fd */ },
1050 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
1051 { .name = "pipe2",
1052 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
1053 { .name = "pkey_alloc",
1054 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, },
1055 { .name = "pkey_free",
1056 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, },
1057 { .name = "pkey_mprotect",
1058 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1059 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
1060 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, },
1061 { .name = "poll", .timeout = true, },
1062 { .name = "ppoll", .timeout = true, },
1063 { .name = "prctl",
1064 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */
1065 .strtoul = STUL_STRARRAY,
1066 .parm = &strarray__prctl_options, },
1067 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
1068 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
1069 { .name = "pread", .alias = "pread64", },
1070 { .name = "preadv", .alias = "pread", },
1071 { .name = "prlimit64",
1072 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, },
1073 { .name = "pwrite", .alias = "pwrite64", },
1074 { .name = "readlinkat",
1075 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1076 { .name = "recvfrom",
1077 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1078 { .name = "recvmmsg",
1079 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1080 { .name = "recvmsg",
1081 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1082 { .name = "renameat",
1083 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
1084 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, },
1085 { .name = "renameat2",
1086 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
1087 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ },
1088 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, },
1089 { .name = "rt_sigaction",
1090 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1091 { .name = "rt_sigprocmask",
1092 .arg = { [0] = STRARRAY(how, sighow), }, },
1093 { .name = "rt_sigqueueinfo",
1094 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1095 { .name = "rt_tgsigqueueinfo",
1096 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1097 { .name = "sched_setscheduler",
1098 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
1099 { .name = "seccomp",
1100 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ },
1101 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
1102 { .name = "select", .timeout = true, },
1103 { .name = "sendfile", .alias = "sendfile64", },
1104 { .name = "sendmmsg",
1105 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1106 { .name = "sendmsg",
1107 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1108 { .name = "sendto",
1109 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ },
1110 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, },
1111 { .name = "set_tid_address", .errpid = true, },
1112 { .name = "setitimer",
1113 .arg = { [0] = STRARRAY(which, itimers), }, },
1114 { .name = "setrlimit",
1115 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
1116 { .name = "socket",
1117 .arg = { [0] = STRARRAY(family, socket_families),
1118 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
1119 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
1120 { .name = "socketpair",
1121 .arg = { [0] = STRARRAY(family, socket_families),
1122 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
1123 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
1124 { .name = "stat", .alias = "newstat", },
1125 { .name = "statx",
1126 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ },
1127 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } ,
1128 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, },
1129 { .name = "swapoff",
1130 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
1131 { .name = "swapon",
1132 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
1133 { .name = "symlinkat",
1134 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1135 { .name = "sync_file_range",
1136 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, },
1137 { .name = "tgkill",
1138 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1139 { .name = "tkill",
1140 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1141 { .name = "umount2", .alias = "umount",
1142 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, },
1143 { .name = "uname", .alias = "newuname", },
1144 { .name = "unlinkat",
1145 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1146 { .name = "utimensat",
1147 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
1148 { .name = "wait4", .errpid = true,
1149 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
1150 { .name = "waitid", .errpid = true,
1151 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
1152};
1153
1154static int syscall_fmt__cmp(const void *name, const void *fmtp)
1155{
1156 const struct syscall_fmt *fmt = fmtp;
1157 return strcmp(name, fmt->name);
1158}
1159
1160static struct syscall_fmt *__syscall_fmt__find(struct syscall_fmt *fmts, const int nmemb, const char *name)
1161{
1162 return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
1163}
1164
1165static struct syscall_fmt *syscall_fmt__find(const char *name)
1166{
1167 const int nmemb = ARRAY_SIZE(syscall_fmts);
1168 return __syscall_fmt__find(syscall_fmts, nmemb, name);
1169}
1170
1171static struct syscall_fmt *__syscall_fmt__find_by_alias(struct syscall_fmt *fmts, const int nmemb, const char *alias)
1172{
1173 int i;
1174
1175 for (i = 0; i < nmemb; ++i) {
1176 if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0)
1177 return &fmts[i];
1178 }
1179
1180 return NULL;
1181}
1182
1183static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias)
1184{
1185 const int nmemb = ARRAY_SIZE(syscall_fmts);
1186 return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias);
1187}
1188
1189/*
1190 * is_exit: is this "exit" or "exit_group"?
1191 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter.
1192 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc.
1193 * nonexistent: Just a hole in the syscall table, syscall id not allocated
1194 */
1195struct syscall {
1196 struct tep_event *tp_format;
1197 int nr_args;
1198 int args_size;
1199 struct {
1200 struct bpf_program *sys_enter,
1201 *sys_exit;
1202 } bpf_prog;
1203 bool is_exit;
1204 bool is_open;
1205 bool nonexistent;
1206 struct tep_format_field *args;
1207 const char *name;
1208 struct syscall_fmt *fmt;
1209 struct syscall_arg_fmt *arg_fmt;
1210};
1211
1212/*
1213 * Must match what is in the BPF program:
1214 *
1215 * tools/perf/examples/bpf/augmented_raw_syscalls.c
1216 */
1217struct bpf_map_syscall_entry {
1218 bool enabled;
1219 u16 string_args_len[6];
1220};
1221
1222/*
1223 * We need to have this 'calculated' boolean because in some cases we really
1224 * don't know what is the duration of a syscall, for instance, when we start
1225 * a session and some threads are waiting for a syscall to finish, say 'poll',
1226 * in which case all we can do is to print "( ? ) for duration and for the
1227 * start timestamp.
1228 */
1229static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
1230{
1231 double duration = (double)t / NSEC_PER_MSEC;
1232 size_t printed = fprintf(fp, "(");
1233
1234 if (!calculated)
1235 printed += fprintf(fp, " ");
1236 else if (duration >= 1.0)
1237 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
1238 else if (duration >= 0.01)
1239 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
1240 else
1241 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
1242 return printed + fprintf(fp, "): ");
1243}
1244
1245/**
1246 * filename.ptr: The filename char pointer that will be vfs_getname'd
1247 * filename.entry_str_pos: Where to insert the string translated from
1248 * filename.ptr by the vfs_getname tracepoint/kprobe.
1249 * ret_scnprintf: syscall args may set this to a different syscall return
1250 * formatter, for instance, fcntl may return fds, file flags, etc.
1251 */
1252struct thread_trace {
1253 u64 entry_time;
1254 bool entry_pending;
1255 unsigned long nr_events;
1256 unsigned long pfmaj, pfmin;
1257 char *entry_str;
1258 double runtime_ms;
1259 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
1260 struct {
1261 unsigned long ptr;
1262 short int entry_str_pos;
1263 bool pending_open;
1264 unsigned int namelen;
1265 char *name;
1266 } filename;
1267 struct {
1268 int max;
1269 struct file *table;
1270 } files;
1271
1272 struct intlist *syscall_stats;
1273};
1274
1275static struct thread_trace *thread_trace__new(void)
1276{
1277 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
1278
1279 if (ttrace) {
1280 ttrace->files.max = -1;
1281 ttrace->syscall_stats = intlist__new(NULL);
1282 }
1283
1284 return ttrace;
1285}
1286
1287static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
1288{
1289 struct thread_trace *ttrace;
1290
1291 if (thread == NULL)
1292 goto fail;
1293
1294 if (thread__priv(thread) == NULL)
1295 thread__set_priv(thread, thread_trace__new());
1296
1297 if (thread__priv(thread) == NULL)
1298 goto fail;
1299
1300 ttrace = thread__priv(thread);
1301 ++ttrace->nr_events;
1302
1303 return ttrace;
1304fail:
1305 color_fprintf(fp, PERF_COLOR_RED,
1306 "WARNING: not enough memory, dropping samples!\n");
1307 return NULL;
1308}
1309
1310
1311void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
1312 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
1313{
1314 struct thread_trace *ttrace = thread__priv(arg->thread);
1315
1316 ttrace->ret_scnprintf = ret_scnprintf;
1317}
1318
1319#define TRACE_PFMAJ (1 << 0)
1320#define TRACE_PFMIN (1 << 1)
1321
1322static const size_t trace__entry_str_size = 2048;
1323
1324static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd)
1325{
1326 if (fd < 0)
1327 return NULL;
1328
1329 if (fd > ttrace->files.max) {
1330 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file));
1331
1332 if (nfiles == NULL)
1333 return NULL;
1334
1335 if (ttrace->files.max != -1) {
1336 memset(nfiles + ttrace->files.max + 1, 0,
1337 (fd - ttrace->files.max) * sizeof(struct file));
1338 } else {
1339 memset(nfiles, 0, (fd + 1) * sizeof(struct file));
1340 }
1341
1342 ttrace->files.table = nfiles;
1343 ttrace->files.max = fd;
1344 }
1345
1346 return ttrace->files.table + fd;
1347}
1348
1349struct file *thread__files_entry(struct thread *thread, int fd)
1350{
1351 return thread_trace__files_entry(thread__priv(thread), fd);
1352}
1353
1354static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
1355{
1356 struct thread_trace *ttrace = thread__priv(thread);
1357 struct file *file = thread_trace__files_entry(ttrace, fd);
1358
1359 if (file != NULL) {
1360 struct stat st;
1361 if (stat(pathname, &st) == 0)
1362 file->dev_maj = major(st.st_rdev);
1363 file->pathname = strdup(pathname);
1364 if (file->pathname)
1365 return 0;
1366 }
1367
1368 return -1;
1369}
1370
1371static int thread__read_fd_path(struct thread *thread, int fd)
1372{
1373 char linkname[PATH_MAX], pathname[PATH_MAX];
1374 struct stat st;
1375 int ret;
1376
1377 if (thread->pid_ == thread->tid) {
1378 scnprintf(linkname, sizeof(linkname),
1379 "/proc/%d/fd/%d", thread->pid_, fd);
1380 } else {
1381 scnprintf(linkname, sizeof(linkname),
1382 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd);
1383 }
1384
1385 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
1386 return -1;
1387
1388 ret = readlink(linkname, pathname, sizeof(pathname));
1389
1390 if (ret < 0 || ret > st.st_size)
1391 return -1;
1392
1393 pathname[ret] = '\0';
1394 return trace__set_fd_pathname(thread, fd, pathname);
1395}
1396
1397static const char *thread__fd_path(struct thread *thread, int fd,
1398 struct trace *trace)
1399{
1400 struct thread_trace *ttrace = thread__priv(thread);
1401
1402 if (ttrace == NULL || trace->fd_path_disabled)
1403 return NULL;
1404
1405 if (fd < 0)
1406 return NULL;
1407
1408 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) {
1409 if (!trace->live)
1410 return NULL;
1411 ++trace->stats.proc_getname;
1412 if (thread__read_fd_path(thread, fd))
1413 return NULL;
1414 }
1415
1416 return ttrace->files.table[fd].pathname;
1417}
1418
1419size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
1420{
1421 int fd = arg->val;
1422 size_t printed = scnprintf(bf, size, "%d", fd);
1423 const char *path = thread__fd_path(arg->thread, fd, arg->trace);
1424
1425 if (path)
1426 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1427
1428 return printed;
1429}
1430
1431size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
1432{
1433 size_t printed = scnprintf(bf, size, "%d", fd);
1434 struct thread *thread = machine__find_thread(trace->host, pid, pid);
1435
1436 if (thread) {
1437 const char *path = thread__fd_path(thread, fd, trace);
1438
1439 if (path)
1440 printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1441
1442 thread__put(thread);
1443 }
1444
1445 return printed;
1446}
1447
1448static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
1449 struct syscall_arg *arg)
1450{
1451 int fd = arg->val;
1452 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
1453 struct thread_trace *ttrace = thread__priv(arg->thread);
1454
1455 if (ttrace && fd >= 0 && fd <= ttrace->files.max)
1456 zfree(&ttrace->files.table[fd].pathname);
1457
1458 return printed;
1459}
1460
1461static void thread__set_filename_pos(struct thread *thread, const char *bf,
1462 unsigned long ptr)
1463{
1464 struct thread_trace *ttrace = thread__priv(thread);
1465
1466 ttrace->filename.ptr = ptr;
1467 ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
1468}
1469
1470static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size)
1471{
1472 struct augmented_arg *augmented_arg = arg->augmented.args;
1473 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value);
1474 /*
1475 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls
1476 * we would have two strings, each prefixed by its size.
1477 */
1478 int consumed = sizeof(*augmented_arg) + augmented_arg->size;
1479
1480 arg->augmented.args = ((void *)arg->augmented.args) + consumed;
1481 arg->augmented.size -= consumed;
1482
1483 return printed;
1484}
1485
1486static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
1487 struct syscall_arg *arg)
1488{
1489 unsigned long ptr = arg->val;
1490
1491 if (arg->augmented.args)
1492 return syscall_arg__scnprintf_augmented_string(arg, bf, size);
1493
1494 if (!arg->trace->vfs_getname)
1495 return scnprintf(bf, size, "%#x", ptr);
1496
1497 thread__set_filename_pos(arg->thread, bf, ptr);
1498 return 0;
1499}
1500
1501static bool trace__filter_duration(struct trace *trace, double t)
1502{
1503 return t < (trace->duration_filter * NSEC_PER_MSEC);
1504}
1505
1506static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1507{
1508 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
1509
1510 return fprintf(fp, "%10.3f ", ts);
1511}
1512
1513/*
1514 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
1515 * using ttrace->entry_time for a thread that receives a sys_exit without
1516 * first having received a sys_enter ("poll" issued before tracing session
1517 * starts, lost sys_enter exit due to ring buffer overflow).
1518 */
1519static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1520{
1521 if (tstamp > 0)
1522 return __trace__fprintf_tstamp(trace, tstamp, fp);
1523
1524 return fprintf(fp, " ? ");
1525}
1526
1527static bool done = false;
1528static bool interrupted = false;
1529
1530static void sig_handler(int sig)
1531{
1532 done = true;
1533 interrupted = sig == SIGINT;
1534}
1535
1536static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp)
1537{
1538 size_t printed = 0;
1539
1540 if (trace->multiple_threads) {
1541 if (trace->show_comm)
1542 printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
1543 printed += fprintf(fp, "%d ", thread->tid);
1544 }
1545
1546 return printed;
1547}
1548
1549static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
1550 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
1551{
1552 size_t printed = 0;
1553
1554 if (trace->show_tstamp)
1555 printed = trace__fprintf_tstamp(trace, tstamp, fp);
1556 if (trace->show_duration)
1557 printed += fprintf_duration(duration, duration_calculated, fp);
1558 return printed + trace__fprintf_comm_tid(trace, thread, fp);
1559}
1560
1561static int trace__process_event(struct trace *trace, struct machine *machine,
1562 union perf_event *event, struct perf_sample *sample)
1563{
1564 int ret = 0;
1565
1566 switch (event->header.type) {
1567 case PERF_RECORD_LOST:
1568 color_fprintf(trace->output, PERF_COLOR_RED,
1569 "LOST %" PRIu64 " events!\n", event->lost.lost);
1570 ret = machine__process_lost_event(machine, event, sample);
1571 break;
1572 default:
1573 ret = machine__process_event(machine, event, sample);
1574 break;
1575 }
1576
1577 return ret;
1578}
1579
1580static int trace__tool_process(struct perf_tool *tool,
1581 union perf_event *event,
1582 struct perf_sample *sample,
1583 struct machine *machine)
1584{
1585 struct trace *trace = container_of(tool, struct trace, tool);
1586 return trace__process_event(trace, machine, event, sample);
1587}
1588
1589static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
1590{
1591 struct machine *machine = vmachine;
1592
1593 if (machine->kptr_restrict_warned)
1594 return NULL;
1595
1596 if (symbol_conf.kptr_restrict) {
1597 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
1598 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n"
1599 "Kernel samples will not be resolved.\n");
1600 machine->kptr_restrict_warned = true;
1601 return NULL;
1602 }
1603
1604 return machine__resolve_kernel_addr(vmachine, addrp, modp);
1605}
1606
1607static int trace__symbols_init(struct trace *trace, struct evlist *evlist)
1608{
1609 int err = symbol__init(NULL);
1610
1611 if (err)
1612 return err;
1613
1614 trace->host = machine__new_host();
1615 if (trace->host == NULL)
1616 return -ENOMEM;
1617
1618 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
1619 if (err < 0)
1620 goto out;
1621
1622 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
1623 evlist->core.threads, trace__tool_process, false,
1624 1);
1625out:
1626 if (err)
1627 symbol__exit();
1628
1629 return err;
1630}
1631
1632static void trace__symbols__exit(struct trace *trace)
1633{
1634 machine__exit(trace->host);
1635 trace->host = NULL;
1636
1637 symbol__exit();
1638}
1639
1640static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
1641{
1642 int idx;
1643
1644 if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0)
1645 nr_args = sc->fmt->nr_args;
1646
1647 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
1648 if (sc->arg_fmt == NULL)
1649 return -1;
1650
1651 for (idx = 0; idx < nr_args; ++idx) {
1652 if (sc->fmt)
1653 sc->arg_fmt[idx] = sc->fmt->arg[idx];
1654 }
1655
1656 sc->nr_args = nr_args;
1657 return 0;
1658}
1659
1660static struct syscall_arg_fmt syscall_arg_fmts__by_name[] = {
1661 { .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, },
1662 { .name = "vector", .scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, },
1663};
1664
1665static int syscall_arg_fmt__cmp(const void *name, const void *fmtp)
1666{
1667 const struct syscall_arg_fmt *fmt = fmtp;
1668 return strcmp(name, fmt->name);
1669}
1670
1671static struct syscall_arg_fmt *
1672__syscall_arg_fmt__find_by_name(struct syscall_arg_fmt *fmts, const int nmemb, const char *name)
1673{
1674 return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp);
1675}
1676
1677static struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name)
1678{
1679 const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name);
1680 return __syscall_arg_fmt__find_by_name(syscall_arg_fmts__by_name, nmemb, name);
1681}
1682
1683static struct tep_format_field *
1684syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field)
1685{
1686 struct tep_format_field *last_field = NULL;
1687 int len;
1688
1689 for (; field; field = field->next, ++arg) {
1690 last_field = field;
1691
1692 if (arg->scnprintf)
1693 continue;
1694
1695 len = strlen(field->name);
1696
1697 if (strcmp(field->type, "const char *") == 0 &&
1698 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) ||
1699 strstr(field->name, "path") != NULL))
1700 arg->scnprintf = SCA_FILENAME;
1701 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr"))
1702 arg->scnprintf = SCA_PTR;
1703 else if (strcmp(field->type, "pid_t") == 0)
1704 arg->scnprintf = SCA_PID;
1705 else if (strcmp(field->type, "umode_t") == 0)
1706 arg->scnprintf = SCA_MODE_T;
1707 else if ((field->flags & TEP_FIELD_IS_ARRAY) && strstr(field->type, "char")) {
1708 arg->scnprintf = SCA_CHAR_ARRAY;
1709 arg->nr_entries = field->arraylen;
1710 } else if ((strcmp(field->type, "int") == 0 ||
1711 strcmp(field->type, "unsigned int") == 0 ||
1712 strcmp(field->type, "long") == 0) &&
1713 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) {
1714 /*
1715 * /sys/kernel/tracing/events/syscalls/sys_enter*
1716 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
1717 * 65 int
1718 * 23 unsigned int
1719 * 7 unsigned long
1720 */
1721 arg->scnprintf = SCA_FD;
1722 } else {
1723 struct syscall_arg_fmt *fmt = syscall_arg_fmt__find_by_name(field->name);
1724
1725 if (fmt) {
1726 arg->scnprintf = fmt->scnprintf;
1727 arg->strtoul = fmt->strtoul;
1728 }
1729 }
1730 }
1731
1732 return last_field;
1733}
1734
1735static int syscall__set_arg_fmts(struct syscall *sc)
1736{
1737 struct tep_format_field *last_field = syscall_arg_fmt__init_array(sc->arg_fmt, sc->args);
1738
1739 if (last_field)
1740 sc->args_size = last_field->offset + last_field->size;
1741
1742 return 0;
1743}
1744
1745static int trace__read_syscall_info(struct trace *trace, int id)
1746{
1747 char tp_name[128];
1748 struct syscall *sc;
1749 const char *name = syscalltbl__name(trace->sctbl, id);
1750
1751#ifdef HAVE_SYSCALL_TABLE_SUPPORT
1752 if (trace->syscalls.table == NULL) {
1753 trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc));
1754 if (trace->syscalls.table == NULL)
1755 return -ENOMEM;
1756 }
1757#else
1758 if (id > trace->sctbl->syscalls.max_id || (id == 0 && trace->syscalls.table == NULL)) {
1759 // When using libaudit we don't know beforehand what is the max syscall id
1760 struct syscall *table = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
1761
1762 if (table == NULL)
1763 return -ENOMEM;
1764
1765 memset(table + trace->sctbl->syscalls.max_id, 0, (id - trace->sctbl->syscalls.max_id) * sizeof(*sc));
1766
1767 trace->syscalls.table = table;
1768 trace->sctbl->syscalls.max_id = id;
1769 }
1770#endif
1771 sc = trace->syscalls.table + id;
1772 if (sc->nonexistent)
1773 return 0;
1774
1775 if (name == NULL) {
1776 sc->nonexistent = true;
1777 return 0;
1778 }
1779
1780 sc->name = name;
1781 sc->fmt = syscall_fmt__find(sc->name);
1782
1783 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
1784 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1785
1786 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
1787 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
1788 sc->tp_format = trace_event__tp_format("syscalls", tp_name);
1789 }
1790
1791 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields))
1792 return -ENOMEM;
1793
1794 if (IS_ERR(sc->tp_format))
1795 return PTR_ERR(sc->tp_format);
1796
1797 sc->args = sc->tp_format->format.fields;
1798 /*
1799 * We need to check and discard the first variable '__syscall_nr'
1800 * or 'nr' that mean the syscall number. It is needless here.
1801 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
1802 */
1803 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
1804 sc->args = sc->args->next;
1805 --sc->nr_args;
1806 }
1807
1808 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
1809 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
1810
1811 return syscall__set_arg_fmts(sc);
1812}
1813
1814static int evsel__init_tp_arg_scnprintf(struct evsel *evsel)
1815{
1816 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
1817
1818 if (fmt != NULL) {
1819 syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields);
1820 return 0;
1821 }
1822
1823 return -ENOMEM;
1824}
1825
1826static int intcmp(const void *a, const void *b)
1827{
1828 const int *one = a, *another = b;
1829
1830 return *one - *another;
1831}
1832
1833static int trace__validate_ev_qualifier(struct trace *trace)
1834{
1835 int err = 0;
1836 bool printed_invalid_prefix = false;
1837 struct str_node *pos;
1838 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier);
1839
1840 trace->ev_qualifier_ids.entries = malloc(nr_allocated *
1841 sizeof(trace->ev_qualifier_ids.entries[0]));
1842
1843 if (trace->ev_qualifier_ids.entries == NULL) {
1844 fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
1845 trace->output);
1846 err = -EINVAL;
1847 goto out;
1848 }
1849
1850 strlist__for_each_entry(pos, trace->ev_qualifier) {
1851 const char *sc = pos->s;
1852 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
1853
1854 if (id < 0) {
1855 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
1856 if (id >= 0)
1857 goto matches;
1858
1859 if (!printed_invalid_prefix) {
1860 pr_debug("Skipping unknown syscalls: ");
1861 printed_invalid_prefix = true;
1862 } else {
1863 pr_debug(", ");
1864 }
1865
1866 pr_debug("%s", sc);
1867 continue;
1868 }
1869matches:
1870 trace->ev_qualifier_ids.entries[nr_used++] = id;
1871 if (match_next == -1)
1872 continue;
1873
1874 while (1) {
1875 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
1876 if (id < 0)
1877 break;
1878 if (nr_allocated == nr_used) {
1879 void *entries;
1880
1881 nr_allocated += 8;
1882 entries = realloc(trace->ev_qualifier_ids.entries,
1883 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
1884 if (entries == NULL) {
1885 err = -ENOMEM;
1886 fputs("\nError:\t Not enough memory for parsing\n", trace->output);
1887 goto out_free;
1888 }
1889 trace->ev_qualifier_ids.entries = entries;
1890 }
1891 trace->ev_qualifier_ids.entries[nr_used++] = id;
1892 }
1893 }
1894
1895 trace->ev_qualifier_ids.nr = nr_used;
1896 qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp);
1897out:
1898 if (printed_invalid_prefix)
1899 pr_debug("\n");
1900 return err;
1901out_free:
1902 zfree(&trace->ev_qualifier_ids.entries);
1903 trace->ev_qualifier_ids.nr = 0;
1904 goto out;
1905}
1906
1907static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id)
1908{
1909 bool in_ev_qualifier;
1910
1911 if (trace->ev_qualifier_ids.nr == 0)
1912 return true;
1913
1914 in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries,
1915 trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL;
1916
1917 if (in_ev_qualifier)
1918 return !trace->not_ev_qualifier;
1919
1920 return trace->not_ev_qualifier;
1921}
1922
1923/*
1924 * args is to be interpreted as a series of longs but we need to handle
1925 * 8-byte unaligned accesses. args points to raw_data within the event
1926 * and raw_data is guaranteed to be 8-byte unaligned because it is
1927 * preceded by raw_size which is a u32. So we need to copy args to a temp
1928 * variable to read it. Most notably this avoids extended load instructions
1929 * on unaligned addresses
1930 */
1931unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
1932{
1933 unsigned long val;
1934 unsigned char *p = arg->args + sizeof(unsigned long) * idx;
1935
1936 memcpy(&val, p, sizeof(val));
1937 return val;
1938}
1939
1940static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
1941 struct syscall_arg *arg)
1942{
1943 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
1944 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
1945
1946 return scnprintf(bf, size, "arg%d: ", arg->idx);
1947}
1948
1949/*
1950 * Check if the value is in fact zero, i.e. mask whatever needs masking, such
1951 * as mount 'flags' argument that needs ignoring some magic flag, see comment
1952 * in tools/perf/trace/beauty/mount_flags.c
1953 */
1954static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val)
1955{
1956 if (fmt && fmt->mask_val)
1957 return fmt->mask_val(arg, val);
1958
1959 return val;
1960}
1961
1962static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size,
1963 struct syscall_arg *arg, unsigned long val)
1964{
1965 if (fmt && fmt->scnprintf) {
1966 arg->val = val;
1967 if (fmt->parm)
1968 arg->parm = fmt->parm;
1969 return fmt->scnprintf(bf, size, arg);
1970 }
1971 return scnprintf(bf, size, "%ld", val);
1972}
1973
1974static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
1975 unsigned char *args, void *augmented_args, int augmented_args_size,
1976 struct trace *trace, struct thread *thread)
1977{
1978 size_t printed = 0;
1979 unsigned long val;
1980 u8 bit = 1;
1981 struct syscall_arg arg = {
1982 .args = args,
1983 .augmented = {
1984 .size = augmented_args_size,
1985 .args = augmented_args,
1986 },
1987 .idx = 0,
1988 .mask = 0,
1989 .trace = trace,
1990 .thread = thread,
1991 .show_string_prefix = trace->show_string_prefix,
1992 };
1993 struct thread_trace *ttrace = thread__priv(thread);
1994
1995 /*
1996 * Things like fcntl will set this in its 'cmd' formatter to pick the
1997 * right formatter for the return value (an fd? file flags?), which is
1998 * not needed for syscalls that always return a given type, say an fd.
1999 */
2000 ttrace->ret_scnprintf = NULL;
2001
2002 if (sc->args != NULL) {
2003 struct tep_format_field *field;
2004
2005 for (field = sc->args; field;
2006 field = field->next, ++arg.idx, bit <<= 1) {
2007 if (arg.mask & bit)
2008 continue;
2009
2010 arg.fmt = &sc->arg_fmt[arg.idx];
2011 val = syscall_arg__val(&arg, arg.idx);
2012 /*
2013 * Some syscall args need some mask, most don't and
2014 * return val untouched.
2015 */
2016 val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val);
2017
2018 /*
2019 * Suppress this argument if its value is zero and
2020 * and we don't have a string associated in an
2021 * strarray for it.
2022 */
2023 if (val == 0 &&
2024 !trace->show_zeros &&
2025 !(sc->arg_fmt &&
2026 (sc->arg_fmt[arg.idx].show_zero ||
2027 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
2028 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
2029 sc->arg_fmt[arg.idx].parm))
2030 continue;
2031
2032 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2033
2034 if (trace->show_arg_names)
2035 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2036
2037 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx],
2038 bf + printed, size - printed, &arg, val);
2039 }
2040 } else if (IS_ERR(sc->tp_format)) {
2041 /*
2042 * If we managed to read the tracepoint /format file, then we
2043 * may end up not having any args, like with gettid(), so only
2044 * print the raw args when we didn't manage to read it.
2045 */
2046 while (arg.idx < sc->nr_args) {
2047 if (arg.mask & bit)
2048 goto next_arg;
2049 val = syscall_arg__val(&arg, arg.idx);
2050 if (printed)
2051 printed += scnprintf(bf + printed, size - printed, ", ");
2052 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
2053 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val);
2054next_arg:
2055 ++arg.idx;
2056 bit <<= 1;
2057 }
2058 }
2059
2060 return printed;
2061}
2062
2063typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel,
2064 union perf_event *event,
2065 struct perf_sample *sample);
2066
2067static struct syscall *trace__syscall_info(struct trace *trace,
2068 struct evsel *evsel, int id)
2069{
2070 int err = 0;
2071
2072 if (id < 0) {
2073
2074 /*
2075 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
2076 * before that, leaving at a higher verbosity level till that is
2077 * explained. Reproduced with plain ftrace with:
2078 *
2079 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
2080 * grep "NR -1 " /t/trace_pipe
2081 *
2082 * After generating some load on the machine.
2083 */
2084 if (verbose > 1) {
2085 static u64 n;
2086 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
2087 id, evsel__name(evsel), ++n);
2088 }
2089 return NULL;
2090 }
2091
2092 err = -EINVAL;
2093
2094#ifdef HAVE_SYSCALL_TABLE_SUPPORT
2095 if (id > trace->sctbl->syscalls.max_id) {
2096#else
2097 if (id >= trace->sctbl->syscalls.max_id) {
2098 /*
2099 * With libaudit we don't know beforehand what is the max_id,
2100 * so we let trace__read_syscall_info() figure that out as we
2101 * go on reading syscalls.
2102 */
2103 err = trace__read_syscall_info(trace, id);
2104 if (err)
2105#endif
2106 goto out_cant_read;
2107 }
2108
2109 if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) &&
2110 (err = trace__read_syscall_info(trace, id)) != 0)
2111 goto out_cant_read;
2112
2113 if (trace->syscalls.table[id].name == NULL) {
2114 if (trace->syscalls.table[id].nonexistent)
2115 return NULL;
2116 goto out_cant_read;
2117 }
2118
2119 return &trace->syscalls.table[id];
2120
2121out_cant_read:
2122 if (verbose > 0) {
2123 char sbuf[STRERR_BUFSIZE];
2124 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf)));
2125 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL)
2126 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
2127 fputs(" information\n", trace->output);
2128 }
2129 return NULL;
2130}
2131
2132struct syscall_stats {
2133 struct stats stats;
2134 u64 nr_failures;
2135 int max_errno;
2136 u32 *errnos;
2137};
2138
2139static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace,
2140 int id, struct perf_sample *sample, long err, bool errno_summary)
2141{
2142 struct int_node *inode;
2143 struct syscall_stats *stats;
2144 u64 duration = 0;
2145
2146 inode = intlist__findnew(ttrace->syscall_stats, id);
2147 if (inode == NULL)
2148 return;
2149
2150 stats = inode->priv;
2151 if (stats == NULL) {
2152 stats = malloc(sizeof(*stats));
2153 if (stats == NULL)
2154 return;
2155
2156 stats->nr_failures = 0;
2157 stats->max_errno = 0;
2158 stats->errnos = NULL;
2159 init_stats(&stats->stats);
2160 inode->priv = stats;
2161 }
2162
2163 if (ttrace->entry_time && sample->time > ttrace->entry_time)
2164 duration = sample->time - ttrace->entry_time;
2165
2166 update_stats(&stats->stats, duration);
2167
2168 if (err < 0) {
2169 ++stats->nr_failures;
2170
2171 if (!errno_summary)
2172 return;
2173
2174 err = -err;
2175 if (err > stats->max_errno) {
2176 u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32));
2177
2178 if (new_errnos) {
2179 memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32));
2180 } else {
2181 pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n",
2182 thread__comm_str(thread), thread->pid_, thread->tid);
2183 return;
2184 }
2185
2186 stats->errnos = new_errnos;
2187 stats->max_errno = err;
2188 }
2189
2190 ++stats->errnos[err - 1];
2191 }
2192}
2193
2194static int trace__printf_interrupted_entry(struct trace *trace)
2195{
2196 struct thread_trace *ttrace;
2197 size_t printed;
2198 int len;
2199
2200 if (trace->failure_only || trace->current == NULL)
2201 return 0;
2202
2203 ttrace = thread__priv(trace->current);
2204
2205 if (!ttrace->entry_pending)
2206 return 0;
2207
2208 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
2209 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str);
2210
2211 if (len < trace->args_alignment - 4)
2212 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " ");
2213
2214 printed += fprintf(trace->output, " ...\n");
2215
2216 ttrace->entry_pending = false;
2217 ++trace->nr_events_printed;
2218
2219 return printed;
2220}
2221
2222static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel,
2223 struct perf_sample *sample, struct thread *thread)
2224{
2225 int printed = 0;
2226
2227 if (trace->print_sample) {
2228 double ts = (double)sample->time / NSEC_PER_MSEC;
2229
2230 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
2231 evsel__name(evsel), ts,
2232 thread__comm_str(thread),
2233 sample->pid, sample->tid, sample->cpu);
2234 }
2235
2236 return printed;
2237}
2238
2239static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size)
2240{
2241 void *augmented_args = NULL;
2242 /*
2243 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter
2244 * and there we get all 6 syscall args plus the tracepoint common fields
2245 * that gets calculated at the start and the syscall_nr (another long).
2246 * So we check if that is the case and if so don't look after the
2247 * sc->args_size but always after the full raw_syscalls:sys_enter payload,
2248 * which is fixed.
2249 *
2250 * We'll revisit this later to pass s->args_size to the BPF augmenter
2251 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it
2252 * copies only what we need for each syscall, like what happens when we
2253 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace
2254 * traffic to just what is needed for each syscall.
2255 */
2256 int args_size = raw_augmented_args_size ?: sc->args_size;
2257
2258 *augmented_args_size = sample->raw_size - args_size;
2259 if (*augmented_args_size > 0)
2260 augmented_args = sample->raw_data + args_size;
2261
2262 return augmented_args;
2263}
2264
2265static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
2266 union perf_event *event __maybe_unused,
2267 struct perf_sample *sample)
2268{
2269 char *msg;
2270 void *args;
2271 int printed = 0;
2272 struct thread *thread;
2273 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2274 int augmented_args_size = 0;
2275 void *augmented_args = NULL;
2276 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2277 struct thread_trace *ttrace;
2278
2279 if (sc == NULL)
2280 return -1;
2281
2282 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2283 ttrace = thread__trace(thread, trace->output);
2284 if (ttrace == NULL)
2285 goto out_put;
2286
2287 trace__fprintf_sample(trace, evsel, sample, thread);
2288
2289 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2290
2291 if (ttrace->entry_str == NULL) {
2292 ttrace->entry_str = malloc(trace__entry_str_size);
2293 if (!ttrace->entry_str)
2294 goto out_put;
2295 }
2296
2297 if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
2298 trace__printf_interrupted_entry(trace);
2299 /*
2300 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible
2301 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments
2302 * this breaks syscall__augmented_args() check for augmented args, as we calculate
2303 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file,
2304 * so when handling, say the openat syscall, we end up getting 6 args for the
2305 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly
2306 * thinking that the extra 2 u64 args are the augmented filename, so just check
2307 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one.
2308 */
2309 if (evsel != trace->syscalls.events.sys_enter)
2310 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2311 ttrace->entry_time = sample->time;
2312 msg = ttrace->entry_str;
2313 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
2314
2315 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
2316 args, augmented_args, augmented_args_size, trace, thread);
2317
2318 if (sc->is_exit) {
2319 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
2320 int alignment = 0;
2321
2322 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
2323 printed = fprintf(trace->output, "%s)", ttrace->entry_str);
2324 if (trace->args_alignment > printed)
2325 alignment = trace->args_alignment - printed;
2326 fprintf(trace->output, "%*s= ?\n", alignment, " ");
2327 }
2328 } else {
2329 ttrace->entry_pending = true;
2330 /* See trace__vfs_getname & trace__sys_exit */
2331 ttrace->filename.pending_open = false;
2332 }
2333
2334 if (trace->current != thread) {
2335 thread__put(trace->current);
2336 trace->current = thread__get(thread);
2337 }
2338 err = 0;
2339out_put:
2340 thread__put(thread);
2341 return err;
2342}
2343
2344static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
2345 struct perf_sample *sample)
2346{
2347 struct thread_trace *ttrace;
2348 struct thread *thread;
2349 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2350 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2351 char msg[1024];
2352 void *args, *augmented_args = NULL;
2353 int augmented_args_size;
2354
2355 if (sc == NULL)
2356 return -1;
2357
2358 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2359 ttrace = thread__trace(thread, trace->output);
2360 /*
2361 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
2362 * and the rest of the beautifiers accessing it via struct syscall_arg touches it.
2363 */
2364 if (ttrace == NULL)
2365 goto out_put;
2366
2367 args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2368 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2369 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
2370 fprintf(trace->output, "%s", msg);
2371 err = 0;
2372out_put:
2373 thread__put(thread);
2374 return err;
2375}
2376
2377static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel,
2378 struct perf_sample *sample,
2379 struct callchain_cursor *cursor)
2380{
2381 struct addr_location al;
2382 int max_stack = evsel->core.attr.sample_max_stack ?
2383 evsel->core.attr.sample_max_stack :
2384 trace->max_stack;
2385 int err;
2386
2387 if (machine__resolve(trace->host, &al, sample) < 0)
2388 return -1;
2389
2390 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack);
2391 addr_location__put(&al);
2392 return err;
2393}
2394
2395static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
2396{
2397 /* TODO: user-configurable print_opts */
2398 const unsigned int print_opts = EVSEL__PRINT_SYM |
2399 EVSEL__PRINT_DSO |
2400 EVSEL__PRINT_UNKNOWN_AS_ADDR;
2401
2402 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, symbol_conf.bt_stop_list, trace->output);
2403}
2404
2405static const char *errno_to_name(struct evsel *evsel, int err)
2406{
2407 struct perf_env *env = evsel__env(evsel);
2408 const char *arch_name = perf_env__arch(env);
2409
2410 return arch_syscalls__strerrno(arch_name, err);
2411}
2412
2413static int trace__sys_exit(struct trace *trace, struct evsel *evsel,
2414 union perf_event *event __maybe_unused,
2415 struct perf_sample *sample)
2416{
2417 long ret;
2418 u64 duration = 0;
2419 bool duration_calculated = false;
2420 struct thread *thread;
2421 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
2422 int alignment = trace->args_alignment;
2423 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2424 struct thread_trace *ttrace;
2425
2426 if (sc == NULL)
2427 return -1;
2428
2429 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2430 ttrace = thread__trace(thread, trace->output);
2431 if (ttrace == NULL)
2432 goto out_put;
2433
2434 trace__fprintf_sample(trace, evsel, sample, thread);
2435
2436 ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
2437
2438 if (trace->summary)
2439 thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary);
2440
2441 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
2442 trace__set_fd_pathname(thread, ret, ttrace->filename.name);
2443 ttrace->filename.pending_open = false;
2444 ++trace->stats.vfs_getname;
2445 }
2446
2447 if (ttrace->entry_time) {
2448 duration = sample->time - ttrace->entry_time;
2449 if (trace__filter_duration(trace, duration))
2450 goto out;
2451 duration_calculated = true;
2452 } else if (trace->duration_filter)
2453 goto out;
2454
2455 if (sample->callchain) {
2456 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2457 if (callchain_ret == 0) {
2458 if (callchain_cursor.nr < trace->min_stack)
2459 goto out;
2460 callchain_ret = 1;
2461 }
2462 }
2463
2464 if (trace->summary_only || (ret >= 0 && trace->failure_only))
2465 goto out;
2466
2467 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
2468
2469 if (ttrace->entry_pending) {
2470 printed = fprintf(trace->output, "%s", ttrace->entry_str);
2471 } else {
2472 printed += fprintf(trace->output, " ... [");
2473 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
2474 printed += 9;
2475 printed += fprintf(trace->output, "]: %s()", sc->name);
2476 }
2477
2478 printed++; /* the closing ')' */
2479
2480 if (alignment > printed)
2481 alignment -= printed;
2482 else
2483 alignment = 0;
2484
2485 fprintf(trace->output, ")%*s= ", alignment, " ");
2486
2487 if (sc->fmt == NULL) {
2488 if (ret < 0)
2489 goto errno_print;
2490signed_print:
2491 fprintf(trace->output, "%ld", ret);
2492 } else if (ret < 0) {
2493errno_print: {
2494 char bf[STRERR_BUFSIZE];
2495 const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
2496 *e = errno_to_name(evsel, -ret);
2497
2498 fprintf(trace->output, "-1 %s (%s)", e, emsg);
2499 }
2500 } else if (ret == 0 && sc->fmt->timeout)
2501 fprintf(trace->output, "0 (Timeout)");
2502 else if (ttrace->ret_scnprintf) {
2503 char bf[1024];
2504 struct syscall_arg arg = {
2505 .val = ret,
2506 .thread = thread,
2507 .trace = trace,
2508 };
2509 ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
2510 ttrace->ret_scnprintf = NULL;
2511 fprintf(trace->output, "%s", bf);
2512 } else if (sc->fmt->hexret)
2513 fprintf(trace->output, "%#lx", ret);
2514 else if (sc->fmt->errpid) {
2515 struct thread *child = machine__find_thread(trace->host, ret, ret);
2516
2517 if (child != NULL) {
2518 fprintf(trace->output, "%ld", ret);
2519 if (child->comm_set)
2520 fprintf(trace->output, " (%s)", thread__comm_str(child));
2521 thread__put(child);
2522 }
2523 } else
2524 goto signed_print;
2525
2526 fputc('\n', trace->output);
2527
2528 /*
2529 * We only consider an 'event' for the sake of --max-events a non-filtered
2530 * sys_enter + sys_exit and other tracepoint events.
2531 */
2532 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX)
2533 interrupted = true;
2534
2535 if (callchain_ret > 0)
2536 trace__fprintf_callchain(trace, sample);
2537 else if (callchain_ret < 0)
2538 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2539out:
2540 ttrace->entry_pending = false;
2541 err = 0;
2542out_put:
2543 thread__put(thread);
2544 return err;
2545}
2546
2547static int trace__vfs_getname(struct trace *trace, struct evsel *evsel,
2548 union perf_event *event __maybe_unused,
2549 struct perf_sample *sample)
2550{
2551 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2552 struct thread_trace *ttrace;
2553 size_t filename_len, entry_str_len, to_move;
2554 ssize_t remaining_space;
2555 char *pos;
2556 const char *filename = evsel__rawptr(evsel, sample, "pathname");
2557
2558 if (!thread)
2559 goto out;
2560
2561 ttrace = thread__priv(thread);
2562 if (!ttrace)
2563 goto out_put;
2564
2565 filename_len = strlen(filename);
2566 if (filename_len == 0)
2567 goto out_put;
2568
2569 if (ttrace->filename.namelen < filename_len) {
2570 char *f = realloc(ttrace->filename.name, filename_len + 1);
2571
2572 if (f == NULL)
2573 goto out_put;
2574
2575 ttrace->filename.namelen = filename_len;
2576 ttrace->filename.name = f;
2577 }
2578
2579 strcpy(ttrace->filename.name, filename);
2580 ttrace->filename.pending_open = true;
2581
2582 if (!ttrace->filename.ptr)
2583 goto out_put;
2584
2585 entry_str_len = strlen(ttrace->entry_str);
2586 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
2587 if (remaining_space <= 0)
2588 goto out_put;
2589
2590 if (filename_len > (size_t)remaining_space) {
2591 filename += filename_len - remaining_space;
2592 filename_len = remaining_space;
2593 }
2594
2595 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
2596 pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
2597 memmove(pos + filename_len, pos, to_move);
2598 memcpy(pos, filename, filename_len);
2599
2600 ttrace->filename.ptr = 0;
2601 ttrace->filename.entry_str_pos = 0;
2602out_put:
2603 thread__put(thread);
2604out:
2605 return 0;
2606}
2607
2608static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel,
2609 union perf_event *event __maybe_unused,
2610 struct perf_sample *sample)
2611{
2612 u64 runtime = evsel__intval(evsel, sample, "runtime");
2613 double runtime_ms = (double)runtime / NSEC_PER_MSEC;
2614 struct thread *thread = machine__findnew_thread(trace->host,
2615 sample->pid,
2616 sample->tid);
2617 struct thread_trace *ttrace = thread__trace(thread, trace->output);
2618
2619 if (ttrace == NULL)
2620 goto out_dump;
2621
2622 ttrace->runtime_ms += runtime_ms;
2623 trace->runtime_ms += runtime_ms;
2624out_put:
2625 thread__put(thread);
2626 return 0;
2627
2628out_dump:
2629 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
2630 evsel->name,
2631 evsel__strval(evsel, sample, "comm"),
2632 (pid_t)evsel__intval(evsel, sample, "pid"),
2633 runtime,
2634 evsel__intval(evsel, sample, "vruntime"));
2635 goto out_put;
2636}
2637
2638static int bpf_output__printer(enum binary_printer_ops op,
2639 unsigned int val, void *extra __maybe_unused, FILE *fp)
2640{
2641 unsigned char ch = (unsigned char)val;
2642
2643 switch (op) {
2644 case BINARY_PRINT_CHAR_DATA:
2645 return fprintf(fp, "%c", isprint(ch) ? ch : '.');
2646 case BINARY_PRINT_DATA_BEGIN:
2647 case BINARY_PRINT_LINE_BEGIN:
2648 case BINARY_PRINT_ADDR:
2649 case BINARY_PRINT_NUM_DATA:
2650 case BINARY_PRINT_NUM_PAD:
2651 case BINARY_PRINT_SEP:
2652 case BINARY_PRINT_CHAR_PAD:
2653 case BINARY_PRINT_LINE_END:
2654 case BINARY_PRINT_DATA_END:
2655 default:
2656 break;
2657 }
2658
2659 return 0;
2660}
2661
2662static void bpf_output__fprintf(struct trace *trace,
2663 struct perf_sample *sample)
2664{
2665 binary__fprintf(sample->raw_data, sample->raw_size, 8,
2666 bpf_output__printer, NULL, trace->output);
2667 ++trace->nr_events_printed;
2668}
2669
2670static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample,
2671 struct thread *thread, void *augmented_args, int augmented_args_size)
2672{
2673 char bf[2048];
2674 size_t size = sizeof(bf);
2675 struct tep_format_field *field = evsel->tp_format->format.fields;
2676 struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel);
2677 size_t printed = 0;
2678 unsigned long val;
2679 u8 bit = 1;
2680 struct syscall_arg syscall_arg = {
2681 .augmented = {
2682 .size = augmented_args_size,
2683 .args = augmented_args,
2684 },
2685 .idx = 0,
2686 .mask = 0,
2687 .trace = trace,
2688 .thread = thread,
2689 .show_string_prefix = trace->show_string_prefix,
2690 };
2691
2692 for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) {
2693 if (syscall_arg.mask & bit)
2694 continue;
2695
2696 syscall_arg.len = 0;
2697 syscall_arg.fmt = arg;
2698 if (field->flags & TEP_FIELD_IS_ARRAY) {
2699 int offset = field->offset;
2700
2701 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2702 offset = format_field__intval(field, sample, evsel->needs_swap);
2703 syscall_arg.len = offset >> 16;
2704 offset &= 0xffff;
2705 }
2706
2707 val = (uintptr_t)(sample->raw_data + offset);
2708 } else
2709 val = format_field__intval(field, sample, evsel->needs_swap);
2710 /*
2711 * Some syscall args need some mask, most don't and
2712 * return val untouched.
2713 */
2714 val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val);
2715
2716 /*
2717 * Suppress this argument if its value is zero and
2718 * and we don't have a string associated in an
2719 * strarray for it.
2720 */
2721 if (val == 0 &&
2722 !trace->show_zeros &&
2723 !((arg->show_zero ||
2724 arg->scnprintf == SCA_STRARRAY ||
2725 arg->scnprintf == SCA_STRARRAYS) &&
2726 arg->parm))
2727 continue;
2728
2729 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2730
2731 /*
2732 * XXX Perhaps we should have a show_tp_arg_names,
2733 * leaving show_arg_names just for syscalls?
2734 */
2735 if (1 || trace->show_arg_names)
2736 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2737
2738 printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val);
2739 }
2740
2741 return printed + fprintf(trace->output, "%s", bf);
2742}
2743
2744static int trace__event_handler(struct trace *trace, struct evsel *evsel,
2745 union perf_event *event __maybe_unused,
2746 struct perf_sample *sample)
2747{
2748 struct thread *thread;
2749 int callchain_ret = 0;
2750 /*
2751 * Check if we called perf_evsel__disable(evsel) due to, for instance,
2752 * this event's max_events having been hit and this is an entry coming
2753 * from the ring buffer that we should discard, since the max events
2754 * have already been considered/printed.
2755 */
2756 if (evsel->disabled)
2757 return 0;
2758
2759 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2760
2761 if (sample->callchain) {
2762 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2763 if (callchain_ret == 0) {
2764 if (callchain_cursor.nr < trace->min_stack)
2765 goto out;
2766 callchain_ret = 1;
2767 }
2768 }
2769
2770 trace__printf_interrupted_entry(trace);
2771 trace__fprintf_tstamp(trace, sample->time, trace->output);
2772
2773 if (trace->trace_syscalls && trace->show_duration)
2774 fprintf(trace->output, "( ): ");
2775
2776 if (thread)
2777 trace__fprintf_comm_tid(trace, thread, trace->output);
2778
2779 if (evsel == trace->syscalls.events.augmented) {
2780 int id = perf_evsel__sc_tp_uint(evsel, id, sample);
2781 struct syscall *sc = trace__syscall_info(trace, evsel, id);
2782
2783 if (sc) {
2784 fprintf(trace->output, "%s(", sc->name);
2785 trace__fprintf_sys_enter(trace, evsel, sample);
2786 fputc(')', trace->output);
2787 goto newline;
2788 }
2789
2790 /*
2791 * XXX: Not having the associated syscall info or not finding/adding
2792 * the thread should never happen, but if it does...
2793 * fall thru and print it as a bpf_output event.
2794 */
2795 }
2796
2797 fprintf(trace->output, "%s(", evsel->name);
2798
2799 if (evsel__is_bpf_output(evsel)) {
2800 bpf_output__fprintf(trace, sample);
2801 } else if (evsel->tp_format) {
2802 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
2803 trace__fprintf_sys_enter(trace, evsel, sample)) {
2804 if (trace->libtraceevent_print) {
2805 event_format__fprintf(evsel->tp_format, sample->cpu,
2806 sample->raw_data, sample->raw_size,
2807 trace->output);
2808 } else {
2809 trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0);
2810 }
2811 }
2812 }
2813
2814newline:
2815 fprintf(trace->output, ")\n");
2816
2817 if (callchain_ret > 0)
2818 trace__fprintf_callchain(trace, sample);
2819 else if (callchain_ret < 0)
2820 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2821
2822 ++trace->nr_events_printed;
2823
2824 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
2825 evsel__disable(evsel);
2826 evsel__close(evsel);
2827 }
2828out:
2829 thread__put(thread);
2830 return 0;
2831}
2832
2833static void print_location(FILE *f, struct perf_sample *sample,
2834 struct addr_location *al,
2835 bool print_dso, bool print_sym)
2836{
2837
2838 if ((verbose > 0 || print_dso) && al->map)
2839 fprintf(f, "%s@", al->map->dso->long_name);
2840
2841 if ((verbose > 0 || print_sym) && al->sym)
2842 fprintf(f, "%s+0x%" PRIx64, al->sym->name,
2843 al->addr - al->sym->start);
2844 else if (al->map)
2845 fprintf(f, "0x%" PRIx64, al->addr);
2846 else
2847 fprintf(f, "0x%" PRIx64, sample->addr);
2848}
2849
2850static int trace__pgfault(struct trace *trace,
2851 struct evsel *evsel,
2852 union perf_event *event __maybe_unused,
2853 struct perf_sample *sample)
2854{
2855 struct thread *thread;
2856 struct addr_location al;
2857 char map_type = 'd';
2858 struct thread_trace *ttrace;
2859 int err = -1;
2860 int callchain_ret = 0;
2861
2862 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2863
2864 if (sample->callchain) {
2865 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
2866 if (callchain_ret == 0) {
2867 if (callchain_cursor.nr < trace->min_stack)
2868 goto out_put;
2869 callchain_ret = 1;
2870 }
2871 }
2872
2873 ttrace = thread__trace(thread, trace->output);
2874 if (ttrace == NULL)
2875 goto out_put;
2876
2877 if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
2878 ttrace->pfmaj++;
2879 else
2880 ttrace->pfmin++;
2881
2882 if (trace->summary_only)
2883 goto out;
2884
2885 thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
2886
2887 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
2888
2889 fprintf(trace->output, "%sfault [",
2890 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
2891 "maj" : "min");
2892
2893 print_location(trace->output, sample, &al, false, true);
2894
2895 fprintf(trace->output, "] => ");
2896
2897 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2898
2899 if (!al.map) {
2900 thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
2901
2902 if (al.map)
2903 map_type = 'x';
2904 else
2905 map_type = '?';
2906 }
2907
2908 print_location(trace->output, sample, &al, true, false);
2909
2910 fprintf(trace->output, " (%c%c)\n", map_type, al.level);
2911
2912 if (callchain_ret > 0)
2913 trace__fprintf_callchain(trace, sample);
2914 else if (callchain_ret < 0)
2915 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2916
2917 ++trace->nr_events_printed;
2918out:
2919 err = 0;
2920out_put:
2921 thread__put(thread);
2922 return err;
2923}
2924
2925static void trace__set_base_time(struct trace *trace,
2926 struct evsel *evsel,
2927 struct perf_sample *sample)
2928{
2929 /*
2930 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
2931 * and don't use sample->time unconditionally, we may end up having
2932 * some other event in the future without PERF_SAMPLE_TIME for good
2933 * reason, i.e. we may not be interested in its timestamps, just in
2934 * it taking place, picking some piece of information when it
2935 * appears in our event stream (vfs_getname comes to mind).
2936 */
2937 if (trace->base_time == 0 && !trace->full_time &&
2938 (evsel->core.attr.sample_type & PERF_SAMPLE_TIME))
2939 trace->base_time = sample->time;
2940}
2941
2942static int trace__process_sample(struct perf_tool *tool,
2943 union perf_event *event,
2944 struct perf_sample *sample,
2945 struct evsel *evsel,
2946 struct machine *machine __maybe_unused)
2947{
2948 struct trace *trace = container_of(tool, struct trace, tool);
2949 struct thread *thread;
2950 int err = 0;
2951
2952 tracepoint_handler handler = evsel->handler;
2953
2954 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2955 if (thread && thread__is_filtered(thread))
2956 goto out;
2957
2958 trace__set_base_time(trace, evsel, sample);
2959
2960 if (handler) {
2961 ++trace->nr_events;
2962 handler(trace, evsel, event, sample);
2963 }
2964out:
2965 thread__put(thread);
2966 return err;
2967}
2968
2969static int trace__record(struct trace *trace, int argc, const char **argv)
2970{
2971 unsigned int rec_argc, i, j;
2972 const char **rec_argv;
2973 const char * const record_args[] = {
2974 "record",
2975 "-R",
2976 "-m", "1024",
2977 "-c", "1",
2978 };
2979 pid_t pid = getpid();
2980 char *filter = asprintf__tp_filter_pids(1, &pid);
2981 const char * const sc_args[] = { "-e", };
2982 unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
2983 const char * const majpf_args[] = { "-e", "major-faults" };
2984 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
2985 const char * const minpf_args[] = { "-e", "minor-faults" };
2986 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
2987 int err = -1;
2988
2989 /* +3 is for the event string below and the pid filter */
2990 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 +
2991 majpf_args_nr + minpf_args_nr + argc;
2992 rec_argv = calloc(rec_argc + 1, sizeof(char *));
2993
2994 if (rec_argv == NULL || filter == NULL)
2995 goto out_free;
2996
2997 j = 0;
2998 for (i = 0; i < ARRAY_SIZE(record_args); i++)
2999 rec_argv[j++] = record_args[i];
3000
3001 if (trace->trace_syscalls) {
3002 for (i = 0; i < sc_args_nr; i++)
3003 rec_argv[j++] = sc_args[i];
3004
3005 /* event string may be different for older kernels - e.g., RHEL6 */
3006 if (is_valid_tracepoint("raw_syscalls:sys_enter"))
3007 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
3008 else if (is_valid_tracepoint("syscalls:sys_enter"))
3009 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
3010 else {
3011 pr_err("Neither raw_syscalls nor syscalls events exist.\n");
3012 goto out_free;
3013 }
3014 }
3015
3016 rec_argv[j++] = "--filter";
3017 rec_argv[j++] = filter;
3018
3019 if (trace->trace_pgfaults & TRACE_PFMAJ)
3020 for (i = 0; i < majpf_args_nr; i++)
3021 rec_argv[j++] = majpf_args[i];
3022
3023 if (trace->trace_pgfaults & TRACE_PFMIN)
3024 for (i = 0; i < minpf_args_nr; i++)
3025 rec_argv[j++] = minpf_args[i];
3026
3027 for (i = 0; i < (unsigned int)argc; i++)
3028 rec_argv[j++] = argv[i];
3029
3030 err = cmd_record(j, rec_argv);
3031out_free:
3032 free(filter);
3033 free(rec_argv);
3034 return err;
3035}
3036
3037static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
3038
3039static bool evlist__add_vfs_getname(struct evlist *evlist)
3040{
3041 bool found = false;
3042 struct evsel *evsel, *tmp;
3043 struct parse_events_error err;
3044 int ret;
3045
3046 bzero(&err, sizeof(err));
3047 ret = parse_events(evlist, "probe:vfs_getname*", &err);
3048 if (ret) {
3049 free(err.str);
3050 free(err.help);
3051 free(err.first_str);
3052 free(err.first_help);
3053 return false;
3054 }
3055
3056 evlist__for_each_entry_safe(evlist, evsel, tmp) {
3057 if (!strstarts(evsel__name(evsel), "probe:vfs_getname"))
3058 continue;
3059
3060 if (evsel__field(evsel, "pathname")) {
3061 evsel->handler = trace__vfs_getname;
3062 found = true;
3063 continue;
3064 }
3065
3066 list_del_init(&evsel->core.node);
3067 evsel->evlist = NULL;
3068 evsel__delete(evsel);
3069 }
3070
3071 return found;
3072}
3073
3074static struct evsel *evsel__new_pgfault(u64 config)
3075{
3076 struct evsel *evsel;
3077 struct perf_event_attr attr = {
3078 .type = PERF_TYPE_SOFTWARE,
3079 .mmap_data = 1,
3080 };
3081
3082 attr.config = config;
3083 attr.sample_period = 1;
3084
3085 event_attr_init(&attr);
3086
3087 evsel = evsel__new(&attr);
3088 if (evsel)
3089 evsel->handler = trace__pgfault;
3090
3091 return evsel;
3092}
3093
3094static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
3095{
3096 const u32 type = event->header.type;
3097 struct evsel *evsel;
3098
3099 if (type != PERF_RECORD_SAMPLE) {
3100 trace__process_event(trace, trace->host, event, sample);
3101 return;
3102 }
3103
3104 evsel = perf_evlist__id2evsel(trace->evlist, sample->id);
3105 if (evsel == NULL) {
3106 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
3107 return;
3108 }
3109
3110 if (evswitch__discard(&trace->evswitch, evsel))
3111 return;
3112
3113 trace__set_base_time(trace, evsel, sample);
3114
3115 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT &&
3116 sample->raw_data == NULL) {
3117 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
3118 evsel__name(evsel), sample->tid,
3119 sample->cpu, sample->raw_size);
3120 } else {
3121 tracepoint_handler handler = evsel->handler;
3122 handler(trace, evsel, event, sample);
3123 }
3124
3125 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX)
3126 interrupted = true;
3127}
3128
3129static int trace__add_syscall_newtp(struct trace *trace)
3130{
3131 int ret = -1;
3132 struct evlist *evlist = trace->evlist;
3133 struct evsel *sys_enter, *sys_exit;
3134
3135 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter);
3136 if (sys_enter == NULL)
3137 goto out;
3138
3139 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
3140 goto out_delete_sys_enter;
3141
3142 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit);
3143 if (sys_exit == NULL)
3144 goto out_delete_sys_enter;
3145
3146 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
3147 goto out_delete_sys_exit;
3148
3149 evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
3150 evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
3151
3152 evlist__add(evlist, sys_enter);
3153 evlist__add(evlist, sys_exit);
3154
3155 if (callchain_param.enabled && !trace->kernel_syscallchains) {
3156 /*
3157 * We're interested only in the user space callchain
3158 * leading to the syscall, allow overriding that for
3159 * debugging reasons using --kernel_syscall_callchains
3160 */
3161 sys_exit->core.attr.exclude_callchain_kernel = 1;
3162 }
3163
3164 trace->syscalls.events.sys_enter = sys_enter;
3165 trace->syscalls.events.sys_exit = sys_exit;
3166
3167 ret = 0;
3168out:
3169 return ret;
3170
3171out_delete_sys_exit:
3172 evsel__delete_priv(sys_exit);
3173out_delete_sys_enter:
3174 evsel__delete_priv(sys_enter);
3175 goto out;
3176}
3177
3178static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
3179{
3180 int err = -1;
3181 struct evsel *sys_exit;
3182 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
3183 trace->ev_qualifier_ids.nr,
3184 trace->ev_qualifier_ids.entries);
3185
3186 if (filter == NULL)
3187 goto out_enomem;
3188
3189 if (!evsel__append_tp_filter(trace->syscalls.events.sys_enter, filter)) {
3190 sys_exit = trace->syscalls.events.sys_exit;
3191 err = evsel__append_tp_filter(sys_exit, filter);
3192 }
3193
3194 free(filter);
3195out:
3196 return err;
3197out_enomem:
3198 errno = ENOMEM;
3199 goto out;
3200}
3201
3202#ifdef HAVE_LIBBPF_SUPPORT
3203static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const char *name)
3204{
3205 if (trace->bpf_obj == NULL)
3206 return NULL;
3207
3208 return bpf_object__find_map_by_name(trace->bpf_obj, name);
3209}
3210
3211static void trace__set_bpf_map_filtered_pids(struct trace *trace)
3212{
3213 trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered");
3214}
3215
3216static void trace__set_bpf_map_syscalls(struct trace *trace)
3217{
3218 trace->syscalls.map = trace__find_bpf_map_by_name(trace, "syscalls");
3219 trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter");
3220 trace->syscalls.prog_array.sys_exit = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit");
3221}
3222
3223static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name)
3224{
3225 if (trace->bpf_obj == NULL)
3226 return NULL;
3227
3228 return bpf_object__find_program_by_title(trace->bpf_obj, name);
3229}
3230
3231static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc,
3232 const char *prog_name, const char *type)
3233{
3234 struct bpf_program *prog;
3235
3236 if (prog_name == NULL) {
3237 char default_prog_name[256];
3238 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->name);
3239 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3240 if (prog != NULL)
3241 goto out_found;
3242 if (sc->fmt && sc->fmt->alias) {
3243 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->fmt->alias);
3244 prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3245 if (prog != NULL)
3246 goto out_found;
3247 }
3248 goto out_unaugmented;
3249 }
3250
3251 prog = trace__find_bpf_program_by_title(trace, prog_name);
3252
3253 if (prog != NULL) {
3254out_found:
3255 return prog;
3256 }
3257
3258 pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n",
3259 prog_name, type, sc->name);
3260out_unaugmented:
3261 return trace->syscalls.unaugmented_prog;
3262}
3263
3264static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
3265{
3266 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3267
3268 if (sc == NULL)
3269 return;
3270
3271 sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3272 sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit");
3273}
3274
3275static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id)
3276{
3277 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3278 return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->syscalls.unaugmented_prog);
3279}
3280
3281static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id)
3282{
3283 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3284 return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->syscalls.unaugmented_prog);
3285}
3286
3287static void trace__init_bpf_map_syscall_args(struct trace *trace, int id, struct bpf_map_syscall_entry *entry)
3288{
3289 struct syscall *sc = trace__syscall_info(trace, NULL, id);
3290 int arg = 0;
3291
3292 if (sc == NULL)
3293 goto out;
3294
3295 for (; arg < sc->nr_args; ++arg) {
3296 entry->string_args_len[arg] = 0;
3297 if (sc->arg_fmt[arg].scnprintf == SCA_FILENAME) {
3298 /* Should be set like strace -s strsize */
3299 entry->string_args_len[arg] = PATH_MAX;
3300 }
3301 }
3302out:
3303 for (; arg < 6; ++arg)
3304 entry->string_args_len[arg] = 0;
3305}
3306static int trace__set_ev_qualifier_bpf_filter(struct trace *trace)
3307{
3308 int fd = bpf_map__fd(trace->syscalls.map);
3309 struct bpf_map_syscall_entry value = {
3310 .enabled = !trace->not_ev_qualifier,
3311 };
3312 int err = 0;
3313 size_t i;
3314
3315 for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) {
3316 int key = trace->ev_qualifier_ids.entries[i];
3317
3318 if (value.enabled) {
3319 trace__init_bpf_map_syscall_args(trace, key, &value);
3320 trace__init_syscall_bpf_progs(trace, key);
3321 }
3322
3323 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST);
3324 if (err)
3325 break;
3326 }
3327
3328 return err;
3329}
3330
3331static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled)
3332{
3333 int fd = bpf_map__fd(trace->syscalls.map);
3334 struct bpf_map_syscall_entry value = {
3335 .enabled = enabled,
3336 };
3337 int err = 0, key;
3338
3339 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3340 if (enabled)
3341 trace__init_bpf_map_syscall_args(trace, key, &value);
3342
3343 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY);
3344 if (err)
3345 break;
3346 }
3347
3348 return err;
3349}
3350
3351static int trace__init_syscalls_bpf_map(struct trace *trace)
3352{
3353 bool enabled = true;
3354
3355 if (trace->ev_qualifier_ids.nr)
3356 enabled = trace->not_ev_qualifier;
3357
3358 return __trace__init_syscalls_bpf_map(trace, enabled);
3359}
3360
3361static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc)
3362{
3363 struct tep_format_field *field, *candidate_field;
3364 int id;
3365
3366 /*
3367 * We're only interested in syscalls that have a pointer:
3368 */
3369 for (field = sc->args; field; field = field->next) {
3370 if (field->flags & TEP_FIELD_IS_POINTER)
3371 goto try_to_find_pair;
3372 }
3373
3374 return NULL;
3375
3376try_to_find_pair:
3377 for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) {
3378 struct syscall *pair = trace__syscall_info(trace, NULL, id);
3379 struct bpf_program *pair_prog;
3380 bool is_candidate = false;
3381
3382 if (pair == NULL || pair == sc ||
3383 pair->bpf_prog.sys_enter == trace->syscalls.unaugmented_prog)
3384 continue;
3385
3386 for (field = sc->args, candidate_field = pair->args;
3387 field && candidate_field; field = field->next, candidate_field = candidate_field->next) {
3388 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
3389 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER;
3390
3391 if (is_pointer) {
3392 if (!candidate_is_pointer) {
3393 // The candidate just doesn't copies our pointer arg, might copy other pointers we want.
3394 continue;
3395 }
3396 } else {
3397 if (candidate_is_pointer) {
3398 // The candidate might copy a pointer we don't have, skip it.
3399 goto next_candidate;
3400 }
3401 continue;
3402 }
3403
3404 if (strcmp(field->type, candidate_field->type))
3405 goto next_candidate;
3406
3407 is_candidate = true;
3408 }
3409
3410 if (!is_candidate)
3411 goto next_candidate;
3412
3413 /*
3414 * Check if the tentative pair syscall augmenter has more pointers, if it has,
3415 * then it may be collecting that and we then can't use it, as it would collect
3416 * more than what is common to the two syscalls.
3417 */
3418 if (candidate_field) {
3419 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next)
3420 if (candidate_field->flags & TEP_FIELD_IS_POINTER)
3421 goto next_candidate;
3422 }
3423
3424 pair_prog = pair->bpf_prog.sys_enter;
3425 /*
3426 * If the pair isn't enabled, then its bpf_prog.sys_enter will not
3427 * have been searched for, so search it here and if it returns the
3428 * unaugmented one, then ignore it, otherwise we'll reuse that BPF
3429 * program for a filtered syscall on a non-filtered one.
3430 *
3431 * For instance, we have "!syscalls:sys_enter_renameat" and that is
3432 * useful for "renameat2".
3433 */
3434 if (pair_prog == NULL) {
3435 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3436 if (pair_prog == trace->syscalls.unaugmented_prog)
3437 goto next_candidate;
3438 }
3439
3440 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name);
3441 return pair_prog;
3442 next_candidate:
3443 continue;
3444 }
3445
3446 return NULL;
3447}
3448
3449static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
3450{
3451 int map_enter_fd = bpf_map__fd(trace->syscalls.prog_array.sys_enter),
3452 map_exit_fd = bpf_map__fd(trace->syscalls.prog_array.sys_exit);
3453 int err = 0, key;
3454
3455 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3456 int prog_fd;
3457
3458 if (!trace__syscall_enabled(trace, key))
3459 continue;
3460
3461 trace__init_syscall_bpf_progs(trace, key);
3462
3463 // It'll get at least the "!raw_syscalls:unaugmented"
3464 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key);
3465 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3466 if (err)
3467 break;
3468 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key);
3469 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY);
3470 if (err)
3471 break;
3472 }
3473
3474 /*
3475 * Now lets do a second pass looking for enabled syscalls without
3476 * an augmenter that have a signature that is a superset of another
3477 * syscall with an augmenter so that we can auto-reuse it.
3478 *
3479 * I.e. if we have an augmenter for the "open" syscall that has
3480 * this signature:
3481 *
3482 * int open(const char *pathname, int flags, mode_t mode);
3483 *
3484 * I.e. that will collect just the first string argument, then we
3485 * can reuse it for the 'creat' syscall, that has this signature:
3486 *
3487 * int creat(const char *pathname, mode_t mode);
3488 *
3489 * and for:
3490 *
3491 * int stat(const char *pathname, struct stat *statbuf);
3492 * int lstat(const char *pathname, struct stat *statbuf);
3493 *
3494 * Because the 'open' augmenter will collect the first arg as a string,
3495 * and leave alone all the other args, which already helps with
3496 * beautifying 'stat' and 'lstat''s pathname arg.
3497 *
3498 * Then, in time, when 'stat' gets an augmenter that collects both
3499 * first and second arg (this one on the raw_syscalls:sys_exit prog
3500 * array tail call, then that one will be used.
3501 */
3502 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3503 struct syscall *sc = trace__syscall_info(trace, NULL, key);
3504 struct bpf_program *pair_prog;
3505 int prog_fd;
3506
3507 if (sc == NULL || sc->bpf_prog.sys_enter == NULL)
3508 continue;
3509
3510 /*
3511 * For now we're just reusing the sys_enter prog, and if it
3512 * already has an augmenter, we don't need to find one.
3513 */
3514 if (sc->bpf_prog.sys_enter != trace->syscalls.unaugmented_prog)
3515 continue;
3516
3517 /*
3518 * Look at all the other syscalls for one that has a signature
3519 * that is close enough that we can share:
3520 */
3521 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc);
3522 if (pair_prog == NULL)
3523 continue;
3524
3525 sc->bpf_prog.sys_enter = pair_prog;
3526
3527 /*
3528 * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter
3529 * with the fd for the program we're reusing:
3530 */
3531 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter);
3532 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3533 if (err)
3534 break;
3535 }
3536
3537
3538 return err;
3539}
3540
3541static void trace__delete_augmented_syscalls(struct trace *trace)
3542{
3543 struct evsel *evsel, *tmp;
3544
3545 evlist__remove(trace->evlist, trace->syscalls.events.augmented);
3546 evsel__delete(trace->syscalls.events.augmented);
3547 trace->syscalls.events.augmented = NULL;
3548
3549 evlist__for_each_entry_safe(trace->evlist, tmp, evsel) {
3550 if (evsel->bpf_obj == trace->bpf_obj) {
3551 evlist__remove(trace->evlist, evsel);
3552 evsel__delete(evsel);
3553 }
3554
3555 }
3556
3557 bpf_object__close(trace->bpf_obj);
3558 trace->bpf_obj = NULL;
3559}
3560#else // HAVE_LIBBPF_SUPPORT
3561static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace __maybe_unused,
3562 const char *name __maybe_unused)
3563{
3564 return NULL;
3565}
3566
3567static void trace__set_bpf_map_filtered_pids(struct trace *trace __maybe_unused)
3568{
3569}
3570
3571static void trace__set_bpf_map_syscalls(struct trace *trace __maybe_unused)
3572{
3573}
3574
3575static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused)
3576{
3577 return 0;
3578}
3579
3580static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused)
3581{
3582 return 0;
3583}
3584
3585static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused,
3586 const char *name __maybe_unused)
3587{
3588 return NULL;
3589}
3590
3591static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused)
3592{
3593 return 0;
3594}
3595
3596static void trace__delete_augmented_syscalls(struct trace *trace __maybe_unused)
3597{
3598}
3599#endif // HAVE_LIBBPF_SUPPORT
3600
3601static bool trace__only_augmented_syscalls_evsels(struct trace *trace)
3602{
3603 struct evsel *evsel;
3604
3605 evlist__for_each_entry(trace->evlist, evsel) {
3606 if (evsel == trace->syscalls.events.augmented ||
3607 evsel->bpf_obj == trace->bpf_obj)
3608 continue;
3609
3610 return false;
3611 }
3612
3613 return true;
3614}
3615
3616static int trace__set_ev_qualifier_filter(struct trace *trace)
3617{
3618 if (trace->syscalls.map)
3619 return trace__set_ev_qualifier_bpf_filter(trace);
3620 if (trace->syscalls.events.sys_enter)
3621 return trace__set_ev_qualifier_tp_filter(trace);
3622 return 0;
3623}
3624
3625static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
3626 size_t npids __maybe_unused, pid_t *pids __maybe_unused)
3627{
3628 int err = 0;
3629#ifdef HAVE_LIBBPF_SUPPORT
3630 bool value = true;
3631 int map_fd = bpf_map__fd(map);
3632 size_t i;
3633
3634 for (i = 0; i < npids; ++i) {
3635 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
3636 if (err)
3637 break;
3638 }
3639#endif
3640 return err;
3641}
3642
3643static int trace__set_filter_loop_pids(struct trace *trace)
3644{
3645 unsigned int nr = 1, err;
3646 pid_t pids[32] = {
3647 getpid(),
3648 };
3649 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
3650
3651 while (thread && nr < ARRAY_SIZE(pids)) {
3652 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid);
3653
3654 if (parent == NULL)
3655 break;
3656
3657 if (!strcmp(thread__comm_str(parent), "sshd") ||
3658 strstarts(thread__comm_str(parent), "gnome-terminal")) {
3659 pids[nr++] = parent->tid;
3660 break;
3661 }
3662 thread = parent;
3663 }
3664
3665 err = perf_evlist__append_tp_filter_pids(trace->evlist, nr, pids);
3666 if (!err && trace->filter_pids.map)
3667 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids);
3668
3669 return err;
3670}
3671
3672static int trace__set_filter_pids(struct trace *trace)
3673{
3674 int err = 0;
3675 /*
3676 * Better not use !target__has_task() here because we need to cover the
3677 * case where no threads were specified in the command line, but a
3678 * workload was, and in that case we will fill in the thread_map when
3679 * we fork the workload in perf_evlist__prepare_workload.
3680 */
3681 if (trace->filter_pids.nr > 0) {
3682 err = perf_evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr,
3683 trace->filter_pids.entries);
3684 if (!err && trace->filter_pids.map) {
3685 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr,
3686 trace->filter_pids.entries);
3687 }
3688 } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) {
3689 err = trace__set_filter_loop_pids(trace);
3690 }
3691
3692 return err;
3693}
3694
3695static int __trace__deliver_event(struct trace *trace, union perf_event *event)
3696{
3697 struct evlist *evlist = trace->evlist;
3698 struct perf_sample sample;
3699 int err;
3700
3701 err = perf_evlist__parse_sample(evlist, event, &sample);
3702 if (err)
3703 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
3704 else
3705 trace__handle_event(trace, event, &sample);
3706
3707 return 0;
3708}
3709
3710static int __trace__flush_events(struct trace *trace)
3711{
3712 u64 first = ordered_events__first_time(&trace->oe.data);
3713 u64 flush = trace->oe.last - NSEC_PER_SEC;
3714
3715 /* Is there some thing to flush.. */
3716 if (first && first < flush)
3717 return ordered_events__flush_time(&trace->oe.data, flush);
3718
3719 return 0;
3720}
3721
3722static int trace__flush_events(struct trace *trace)
3723{
3724 return !trace->sort_events ? 0 : __trace__flush_events(trace);
3725}
3726
3727static int trace__deliver_event(struct trace *trace, union perf_event *event)
3728{
3729 int err;
3730
3731 if (!trace->sort_events)
3732 return __trace__deliver_event(trace, event);
3733
3734 err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last);
3735 if (err && err != -1)
3736 return err;
3737
3738 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0);
3739 if (err)
3740 return err;
3741
3742 return trace__flush_events(trace);
3743}
3744
3745static int ordered_events__deliver_event(struct ordered_events *oe,
3746 struct ordered_event *event)
3747{
3748 struct trace *trace = container_of(oe, struct trace, oe.data);
3749
3750 return __trace__deliver_event(trace, event->event);
3751}
3752
3753static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg)
3754{
3755 struct tep_format_field *field;
3756 struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel);
3757
3758 if (evsel->tp_format == NULL || fmt == NULL)
3759 return NULL;
3760
3761 for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt)
3762 if (strcmp(field->name, arg) == 0)
3763 return fmt;
3764
3765 return NULL;
3766}
3767
3768static int trace__expand_filter(struct trace *trace __maybe_unused, struct evsel *evsel)
3769{
3770 char *tok, *left = evsel->filter, *new_filter = evsel->filter;
3771
3772 while ((tok = strpbrk(left, "=<>!")) != NULL) {
3773 char *right = tok + 1, *right_end;
3774
3775 if (*right == '=')
3776 ++right;
3777
3778 while (isspace(*right))
3779 ++right;
3780
3781 if (*right == '\0')
3782 break;
3783
3784 while (!isalpha(*left))
3785 if (++left == tok) {
3786 /*
3787 * Bail out, can't find the name of the argument that is being
3788 * used in the filter, let it try to set this filter, will fail later.
3789 */
3790 return 0;
3791 }
3792
3793 right_end = right + 1;
3794 while (isalnum(*right_end) || *right_end == '_' || *right_end == '|')
3795 ++right_end;
3796
3797 if (isalpha(*right)) {
3798 struct syscall_arg_fmt *fmt;
3799 int left_size = tok - left,
3800 right_size = right_end - right;
3801 char arg[128];
3802
3803 while (isspace(left[left_size - 1]))
3804 --left_size;
3805
3806 scnprintf(arg, sizeof(arg), "%.*s", left_size, left);
3807
3808 fmt = evsel__find_syscall_arg_fmt_by_name(evsel, arg);
3809 if (fmt == NULL) {
3810 pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n",
3811 arg, evsel->name, evsel->filter);
3812 return -1;
3813 }
3814
3815 pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ",
3816 arg, (int)(right - tok), tok, right_size, right);
3817
3818 if (fmt->strtoul) {
3819 u64 val;
3820 struct syscall_arg syscall_arg = {
3821 .parm = fmt->parm,
3822 };
3823
3824 if (fmt->strtoul(right, right_size, &syscall_arg, &val)) {
3825 char *n, expansion[19];
3826 int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val);
3827 int expansion_offset = right - new_filter;
3828
3829 pr_debug("%s", expansion);
3830
3831 if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) {
3832 pr_debug(" out of memory!\n");
3833 free(new_filter);
3834 return -1;
3835 }
3836 if (new_filter != evsel->filter)
3837 free(new_filter);
3838 left = n + expansion_offset + expansion_lenght;
3839 new_filter = n;
3840 } else {
3841 pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3842 right_size, right, arg, evsel->name, evsel->filter);
3843 return -1;
3844 }
3845 } else {
3846 pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3847 arg, evsel->name, evsel->filter);
3848 return -1;
3849 }
3850
3851 pr_debug("\n");
3852 } else {
3853 left = right_end;
3854 }
3855 }
3856
3857 if (new_filter != evsel->filter) {
3858 pr_debug("New filter for %s: %s\n", evsel->name, new_filter);
3859 evsel__set_filter(evsel, new_filter);
3860 free(new_filter);
3861 }
3862
3863 return 0;
3864}
3865
3866static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel)
3867{
3868 struct evlist *evlist = trace->evlist;
3869 struct evsel *evsel;
3870
3871 evlist__for_each_entry(evlist, evsel) {
3872 if (evsel->filter == NULL)
3873 continue;
3874
3875 if (trace__expand_filter(trace, evsel)) {
3876 *err_evsel = evsel;
3877 return -1;
3878 }
3879 }
3880
3881 return 0;
3882}
3883
3884static int trace__run(struct trace *trace, int argc, const char **argv)
3885{
3886 struct evlist *evlist = trace->evlist;
3887 struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
3888 int err = -1, i;
3889 unsigned long before;
3890 const bool forks = argc > 0;
3891 bool draining = false;
3892
3893 trace->live = true;
3894
3895 if (!trace->raw_augmented_syscalls) {
3896 if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
3897 goto out_error_raw_syscalls;
3898
3899 if (trace->trace_syscalls)
3900 trace->vfs_getname = evlist__add_vfs_getname(evlist);
3901 }
3902
3903 if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
3904 pgfault_maj = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
3905 if (pgfault_maj == NULL)
3906 goto out_error_mem;
3907 evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
3908 evlist__add(evlist, pgfault_maj);
3909 }
3910
3911 if ((trace->trace_pgfaults & TRACE_PFMIN)) {
3912 pgfault_min = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
3913 if (pgfault_min == NULL)
3914 goto out_error_mem;
3915 evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
3916 evlist__add(evlist, pgfault_min);
3917 }
3918
3919 if (trace->sched &&
3920 evlist__add_newtp(evlist, "sched", "sched_stat_runtime", trace__sched_stat_runtime))
3921 goto out_error_sched_stat_runtime;
3922 /*
3923 * If a global cgroup was set, apply it to all the events without an
3924 * explicit cgroup. I.e.:
3925 *
3926 * trace -G A -e sched:*switch
3927 *
3928 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
3929 * _and_ sched:sched_switch to the 'A' cgroup, while:
3930 *
3931 * trace -e sched:*switch -G A
3932 *
3933 * will only set the sched:sched_switch event to the 'A' cgroup, all the
3934 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
3935 * a cgroup (on the root cgroup, sys wide, etc).
3936 *
3937 * Multiple cgroups:
3938 *
3939 * trace -G A -e sched:*switch -G B
3940 *
3941 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
3942 * to the 'B' cgroup.
3943 *
3944 * evlist__set_default_cgroup() grabs a reference of the passed cgroup
3945 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
3946 */
3947 if (trace->cgroup)
3948 evlist__set_default_cgroup(trace->evlist, trace->cgroup);
3949
3950 err = perf_evlist__create_maps(evlist, &trace->opts.target);
3951 if (err < 0) {
3952 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
3953 goto out_delete_evlist;
3954 }
3955
3956 err = trace__symbols_init(trace, evlist);
3957 if (err < 0) {
3958 fprintf(trace->output, "Problems initializing symbol libraries!\n");
3959 goto out_delete_evlist;
3960 }
3961
3962 perf_evlist__config(evlist, &trace->opts, &callchain_param);
3963
3964 signal(SIGCHLD, sig_handler);
3965 signal(SIGINT, sig_handler);
3966
3967 if (forks) {
3968 err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
3969 argv, false, NULL);
3970 if (err < 0) {
3971 fprintf(trace->output, "Couldn't run the workload!\n");
3972 goto out_delete_evlist;
3973 }
3974 }
3975
3976 err = evlist__open(evlist);
3977 if (err < 0)
3978 goto out_error_open;
3979
3980 err = bpf__apply_obj_config();
3981 if (err) {
3982 char errbuf[BUFSIZ];
3983
3984 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
3985 pr_err("ERROR: Apply config to BPF failed: %s\n",
3986 errbuf);
3987 goto out_error_open;
3988 }
3989
3990 err = trace__set_filter_pids(trace);
3991 if (err < 0)
3992 goto out_error_mem;
3993
3994 if (trace->syscalls.map)
3995 trace__init_syscalls_bpf_map(trace);
3996
3997 if (trace->syscalls.prog_array.sys_enter)
3998 trace__init_syscalls_bpf_prog_array_maps(trace);
3999
4000 if (trace->ev_qualifier_ids.nr > 0) {
4001 err = trace__set_ev_qualifier_filter(trace);
4002 if (err < 0)
4003 goto out_errno;
4004
4005 if (trace->syscalls.events.sys_exit) {
4006 pr_debug("event qualifier tracepoint filter: %s\n",
4007 trace->syscalls.events.sys_exit->filter);
4008 }
4009 }
4010
4011 /*
4012 * If the "close" syscall is not traced, then we will not have the
4013 * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the
4014 * fd->pathname table and were ending up showing the last value set by
4015 * syscalls opening a pathname and associating it with a descriptor or
4016 * reading it from /proc/pid/fd/ in cases where that doesn't make
4017 * sense.
4018 *
4019 * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is
4020 * not in use.
4021 */
4022 trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close"));
4023
4024 err = trace__expand_filters(trace, &evsel);
4025 if (err)
4026 goto out_delete_evlist;
4027 err = perf_evlist__apply_filters(evlist, &evsel);
4028 if (err < 0)
4029 goto out_error_apply_filters;
4030
4031 if (trace->dump.map)
4032 bpf_map__fprintf(trace->dump.map, trace->output);
4033
4034 err = evlist__mmap(evlist, trace->opts.mmap_pages);
4035 if (err < 0)
4036 goto out_error_mmap;
4037
4038 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay)
4039 evlist__enable(evlist);
4040
4041 if (forks)
4042 perf_evlist__start_workload(evlist);
4043
4044 if (trace->opts.initial_delay) {
4045 usleep(trace->opts.initial_delay * 1000);
4046 evlist__enable(evlist);
4047 }
4048
4049 trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 ||
4050 evlist->core.threads->nr > 1 ||
4051 evlist__first(evlist)->core.attr.inherit;
4052
4053 /*
4054 * Now that we already used evsel->core.attr to ask the kernel to setup the
4055 * events, lets reuse evsel->core.attr.sample_max_stack as the limit in
4056 * trace__resolve_callchain(), allowing per-event max-stack settings
4057 * to override an explicitly set --max-stack global setting.
4058 */
4059 evlist__for_each_entry(evlist, evsel) {
4060 if (evsel__has_callchain(evsel) &&
4061 evsel->core.attr.sample_max_stack == 0)
4062 evsel->core.attr.sample_max_stack = trace->max_stack;
4063 }
4064again:
4065 before = trace->nr_events;
4066
4067 for (i = 0; i < evlist->core.nr_mmaps; i++) {
4068 union perf_event *event;
4069 struct mmap *md;
4070
4071 md = &evlist->mmap[i];
4072 if (perf_mmap__read_init(&md->core) < 0)
4073 continue;
4074
4075 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
4076 ++trace->nr_events;
4077
4078 err = trace__deliver_event(trace, event);
4079 if (err)
4080 goto out_disable;
4081
4082 perf_mmap__consume(&md->core);
4083
4084 if (interrupted)
4085 goto out_disable;
4086
4087 if (done && !draining) {
4088 evlist__disable(evlist);
4089 draining = true;
4090 }
4091 }
4092 perf_mmap__read_done(&md->core);
4093 }
4094
4095 if (trace->nr_events == before) {
4096 int timeout = done ? 100 : -1;
4097
4098 if (!draining && evlist__poll(evlist, timeout) > 0) {
4099 if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
4100 draining = true;
4101
4102 goto again;
4103 } else {
4104 if (trace__flush_events(trace))
4105 goto out_disable;
4106 }
4107 } else {
4108 goto again;
4109 }
4110
4111out_disable:
4112 thread__zput(trace->current);
4113
4114 evlist__disable(evlist);
4115
4116 if (trace->sort_events)
4117 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL);
4118
4119 if (!err) {
4120 if (trace->summary)
4121 trace__fprintf_thread_summary(trace, trace->output);
4122
4123 if (trace->show_tool_stats) {
4124 fprintf(trace->output, "Stats:\n "
4125 " vfs_getname : %" PRIu64 "\n"
4126 " proc_getname: %" PRIu64 "\n",
4127 trace->stats.vfs_getname,
4128 trace->stats.proc_getname);
4129 }
4130 }
4131
4132out_delete_evlist:
4133 trace__symbols__exit(trace);
4134
4135 evlist__delete(evlist);
4136 cgroup__put(trace->cgroup);
4137 trace->evlist = NULL;
4138 trace->live = false;
4139 return err;
4140{
4141 char errbuf[BUFSIZ];
4142
4143out_error_sched_stat_runtime:
4144 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
4145 goto out_error;
4146
4147out_error_raw_syscalls:
4148 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
4149 goto out_error;
4150
4151out_error_mmap:
4152 evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
4153 goto out_error;
4154
4155out_error_open:
4156 evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
4157
4158out_error:
4159 fprintf(trace->output, "%s\n", errbuf);
4160 goto out_delete_evlist;
4161
4162out_error_apply_filters:
4163 fprintf(trace->output,
4164 "Failed to set filter \"%s\" on event %s with %d (%s)\n",
4165 evsel->filter, evsel__name(evsel), errno,
4166 str_error_r(errno, errbuf, sizeof(errbuf)));
4167 goto out_delete_evlist;
4168}
4169out_error_mem:
4170 fprintf(trace->output, "Not enough memory to run!\n");
4171 goto out_delete_evlist;
4172
4173out_errno:
4174 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
4175 goto out_delete_evlist;
4176}
4177
4178static int trace__replay(struct trace *trace)
4179{
4180 const struct evsel_str_handler handlers[] = {
4181 { "probe:vfs_getname", trace__vfs_getname, },
4182 };
4183 struct perf_data data = {
4184 .path = input_name,
4185 .mode = PERF_DATA_MODE_READ,
4186 .force = trace->force,
4187 };
4188 struct perf_session *session;
4189 struct evsel *evsel;
4190 int err = -1;
4191
4192 trace->tool.sample = trace__process_sample;
4193 trace->tool.mmap = perf_event__process_mmap;
4194 trace->tool.mmap2 = perf_event__process_mmap2;
4195 trace->tool.comm = perf_event__process_comm;
4196 trace->tool.exit = perf_event__process_exit;
4197 trace->tool.fork = perf_event__process_fork;
4198 trace->tool.attr = perf_event__process_attr;
4199 trace->tool.tracing_data = perf_event__process_tracing_data;
4200 trace->tool.build_id = perf_event__process_build_id;
4201 trace->tool.namespaces = perf_event__process_namespaces;
4202
4203 trace->tool.ordered_events = true;
4204 trace->tool.ordering_requires_timestamps = true;
4205
4206 /* add tid to output */
4207 trace->multiple_threads = true;
4208
4209 session = perf_session__new(&data, false, &trace->tool);
4210 if (IS_ERR(session))
4211 return PTR_ERR(session);
4212
4213 if (trace->opts.target.pid)
4214 symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
4215
4216 if (trace->opts.target.tid)
4217 symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
4218
4219 if (symbol__init(&session->header.env) < 0)
4220 goto out;
4221
4222 trace->host = &session->machines.host;
4223
4224 err = perf_session__set_tracepoints_handlers(session, handlers);
4225 if (err)
4226 goto out;
4227
4228 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4229 "raw_syscalls:sys_enter");
4230 /* older kernels have syscalls tp versus raw_syscalls */
4231 if (evsel == NULL)
4232 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4233 "syscalls:sys_enter");
4234
4235 if (evsel &&
4236 (evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 ||
4237 perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
4238 pr_err("Error during initialize raw_syscalls:sys_enter event\n");
4239 goto out;
4240 }
4241
4242 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4243 "raw_syscalls:sys_exit");
4244 if (evsel == NULL)
4245 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
4246 "syscalls:sys_exit");
4247 if (evsel &&
4248 (evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 ||
4249 perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
4250 pr_err("Error during initialize raw_syscalls:sys_exit event\n");
4251 goto out;
4252 }
4253
4254 evlist__for_each_entry(session->evlist, evsel) {
4255 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE &&
4256 (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
4257 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
4258 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS))
4259 evsel->handler = trace__pgfault;
4260 }
4261
4262 setup_pager();
4263
4264 err = perf_session__process_events(session);
4265 if (err)
4266 pr_err("Failed to process events, error %d", err);
4267
4268 else if (trace->summary)
4269 trace__fprintf_thread_summary(trace, trace->output);
4270
4271out:
4272 perf_session__delete(session);
4273
4274 return err;
4275}
4276
4277static size_t trace__fprintf_threads_header(FILE *fp)
4278{
4279 size_t printed;
4280
4281 printed = fprintf(fp, "\n Summary of events:\n\n");
4282
4283 return printed;
4284}
4285
4286DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
4287 struct syscall_stats *stats;
4288 double msecs;
4289 int syscall;
4290)
4291{
4292 struct int_node *source = rb_entry(nd, struct int_node, rb_node);
4293 struct syscall_stats *stats = source->priv;
4294
4295 entry->syscall = source->i;
4296 entry->stats = stats;
4297 entry->msecs = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0;
4298}
4299
4300static size_t thread__dump_stats(struct thread_trace *ttrace,
4301 struct trace *trace, FILE *fp)
4302{
4303 size_t printed = 0;
4304 struct syscall *sc;
4305 struct rb_node *nd;
4306 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
4307
4308 if (syscall_stats == NULL)
4309 return 0;
4310
4311 printed += fprintf(fp, "\n");
4312
4313 printed += fprintf(fp, " syscall calls errors total min avg max stddev\n");
4314 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
4315 printed += fprintf(fp, " --------------- -------- ------ -------- --------- --------- --------- ------\n");
4316
4317 resort_rb__for_each_entry(nd, syscall_stats) {
4318 struct syscall_stats *stats = syscall_stats_entry->stats;
4319 if (stats) {
4320 double min = (double)(stats->stats.min) / NSEC_PER_MSEC;
4321 double max = (double)(stats->stats.max) / NSEC_PER_MSEC;
4322 double avg = avg_stats(&stats->stats);
4323 double pct;
4324 u64 n = (u64)stats->stats.n;
4325
4326 pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0;
4327 avg /= NSEC_PER_MSEC;
4328
4329 sc = &trace->syscalls.table[syscall_stats_entry->syscall];
4330 printed += fprintf(fp, " %-15s", sc->name);
4331 printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f",
4332 n, stats->nr_failures, syscall_stats_entry->msecs, min, avg);
4333 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
4334
4335 if (trace->errno_summary && stats->nr_failures) {
4336 const char *arch_name = perf_env__arch(trace->host->env);
4337 int e;
4338
4339 for (e = 0; e < stats->max_errno; ++e) {
4340 if (stats->errnos[e] != 0)
4341 fprintf(fp, "\t\t\t\t%s: %d\n", arch_syscalls__strerrno(arch_name, e + 1), stats->errnos[e]);
4342 }
4343 }
4344 }
4345 }
4346
4347 resort_rb__delete(syscall_stats);
4348 printed += fprintf(fp, "\n\n");
4349
4350 return printed;
4351}
4352
4353static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
4354{
4355 size_t printed = 0;
4356 struct thread_trace *ttrace = thread__priv(thread);
4357 double ratio;
4358
4359 if (ttrace == NULL)
4360 return 0;
4361
4362 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
4363
4364 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid);
4365 printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
4366 printed += fprintf(fp, "%.1f%%", ratio);
4367 if (ttrace->pfmaj)
4368 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
4369 if (ttrace->pfmin)
4370 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
4371 if (trace->sched)
4372 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
4373 else if (fputc('\n', fp) != EOF)
4374 ++printed;
4375
4376 printed += thread__dump_stats(ttrace, trace, fp);
4377
4378 return printed;
4379}
4380
4381static unsigned long thread__nr_events(struct thread_trace *ttrace)
4382{
4383 return ttrace ? ttrace->nr_events : 0;
4384}
4385
4386DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)),
4387 struct thread *thread;
4388)
4389{
4390 entry->thread = rb_entry(nd, struct thread, rb_node);
4391}
4392
4393static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
4394{
4395 size_t printed = trace__fprintf_threads_header(fp);
4396 struct rb_node *nd;
4397 int i;
4398
4399 for (i = 0; i < THREADS__TABLE_SIZE; i++) {
4400 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
4401
4402 if (threads == NULL) {
4403 fprintf(fp, "%s", "Error sorting output by nr_events!\n");
4404 return 0;
4405 }
4406
4407 resort_rb__for_each_entry(nd, threads)
4408 printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
4409
4410 resort_rb__delete(threads);
4411 }
4412 return printed;
4413}
4414
4415static int trace__set_duration(const struct option *opt, const char *str,
4416 int unset __maybe_unused)
4417{
4418 struct trace *trace = opt->value;
4419
4420 trace->duration_filter = atof(str);
4421 return 0;
4422}
4423
4424static int trace__set_filter_pids_from_option(const struct option *opt, const char *str,
4425 int unset __maybe_unused)
4426{
4427 int ret = -1;
4428 size_t i;
4429 struct trace *trace = opt->value;
4430 /*
4431 * FIXME: introduce a intarray class, plain parse csv and create a
4432 * { int nr, int entries[] } struct...
4433 */
4434 struct intlist *list = intlist__new(str);
4435
4436 if (list == NULL)
4437 return -1;
4438
4439 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
4440 trace->filter_pids.entries = calloc(i, sizeof(pid_t));
4441
4442 if (trace->filter_pids.entries == NULL)
4443 goto out;
4444
4445 trace->filter_pids.entries[0] = getpid();
4446
4447 for (i = 1; i < trace->filter_pids.nr; ++i)
4448 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
4449
4450 intlist__delete(list);
4451 ret = 0;
4452out:
4453 return ret;
4454}
4455
4456static int trace__open_output(struct trace *trace, const char *filename)
4457{
4458 struct stat st;
4459
4460 if (!stat(filename, &st) && st.st_size) {
4461 char oldname[PATH_MAX];
4462
4463 scnprintf(oldname, sizeof(oldname), "%s.old", filename);
4464 unlink(oldname);
4465 rename(filename, oldname);
4466 }
4467
4468 trace->output = fopen(filename, "w");
4469
4470 return trace->output == NULL ? -errno : 0;
4471}
4472
4473static int parse_pagefaults(const struct option *opt, const char *str,
4474 int unset __maybe_unused)
4475{
4476 int *trace_pgfaults = opt->value;
4477
4478 if (strcmp(str, "all") == 0)
4479 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
4480 else if (strcmp(str, "maj") == 0)
4481 *trace_pgfaults |= TRACE_PFMAJ;
4482 else if (strcmp(str, "min") == 0)
4483 *trace_pgfaults |= TRACE_PFMIN;
4484 else
4485 return -1;
4486
4487 return 0;
4488}
4489
4490static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler)
4491{
4492 struct evsel *evsel;
4493
4494 evlist__for_each_entry(evlist, evsel) {
4495 if (evsel->handler == NULL)
4496 evsel->handler = handler;
4497 }
4498}
4499
4500static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name)
4501{
4502 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
4503
4504 if (fmt) {
4505 struct syscall_fmt *scfmt = syscall_fmt__find(name);
4506
4507 if (scfmt) {
4508 int skip = 0;
4509
4510 if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 ||
4511 strcmp(evsel->tp_format->format.fields->name, "nr") == 0)
4512 ++skip;
4513
4514 memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt));
4515 }
4516 }
4517}
4518
4519static int evlist__set_syscall_tp_fields(struct evlist *evlist)
4520{
4521 struct evsel *evsel;
4522
4523 evlist__for_each_entry(evlist, evsel) {
4524 if (evsel->priv || !evsel->tp_format)
4525 continue;
4526
4527 if (strcmp(evsel->tp_format->system, "syscalls")) {
4528 evsel__init_tp_arg_scnprintf(evsel);
4529 continue;
4530 }
4531
4532 if (evsel__init_syscall_tp(evsel))
4533 return -1;
4534
4535 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
4536 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4537
4538 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
4539 return -1;
4540
4541 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1);
4542 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
4543 struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4544
4545 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
4546 return -1;
4547
4548 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1);
4549 }
4550 }
4551
4552 return 0;
4553}
4554
4555/*
4556 * XXX: Hackish, just splitting the combined -e+--event (syscalls
4557 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
4558 * existing facilities unchanged (trace->ev_qualifier + parse_options()).
4559 *
4560 * It'd be better to introduce a parse_options() variant that would return a
4561 * list with the terms it didn't match to an event...
4562 */
4563static int trace__parse_events_option(const struct option *opt, const char *str,
4564 int unset __maybe_unused)
4565{
4566 struct trace *trace = (struct trace *)opt->value;
4567 const char *s = str;
4568 char *sep = NULL, *lists[2] = { NULL, NULL, };
4569 int len = strlen(str) + 1, err = -1, list, idx;
4570 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
4571 char group_name[PATH_MAX];
4572 struct syscall_fmt *fmt;
4573
4574 if (strace_groups_dir == NULL)
4575 return -1;
4576
4577 if (*s == '!') {
4578 ++s;
4579 trace->not_ev_qualifier = true;
4580 }
4581
4582 while (1) {
4583 if ((sep = strchr(s, ',')) != NULL)
4584 *sep = '\0';
4585
4586 list = 0;
4587 if (syscalltbl__id(trace->sctbl, s) >= 0 ||
4588 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
4589 list = 1;
4590 goto do_concat;
4591 }
4592
4593 fmt = syscall_fmt__find_by_alias(s);
4594 if (fmt != NULL) {
4595 list = 1;
4596 s = fmt->name;
4597 } else {
4598 path__join(group_name, sizeof(group_name), strace_groups_dir, s);
4599 if (access(group_name, R_OK) == 0)
4600 list = 1;
4601 }
4602do_concat:
4603 if (lists[list]) {
4604 sprintf(lists[list] + strlen(lists[list]), ",%s", s);
4605 } else {
4606 lists[list] = malloc(len);
4607 if (lists[list] == NULL)
4608 goto out;
4609 strcpy(lists[list], s);
4610 }
4611
4612 if (!sep)
4613 break;
4614
4615 *sep = ',';
4616 s = sep + 1;
4617 }
4618
4619 if (lists[1] != NULL) {
4620 struct strlist_config slist_config = {
4621 .dirname = strace_groups_dir,
4622 };
4623
4624 trace->ev_qualifier = strlist__new(lists[1], &slist_config);
4625 if (trace->ev_qualifier == NULL) {
4626 fputs("Not enough memory to parse event qualifier", trace->output);
4627 goto out;
4628 }
4629
4630 if (trace__validate_ev_qualifier(trace))
4631 goto out;
4632 trace->trace_syscalls = true;
4633 }
4634
4635 err = 0;
4636
4637 if (lists[0]) {
4638 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
4639 "event selector. use 'perf list' to list available events",
4640 parse_events_option);
4641 err = parse_events_option(&o, lists[0], 0);
4642 }
4643out:
4644 if (sep)
4645 *sep = ',';
4646
4647 return err;
4648}
4649
4650static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
4651{
4652 struct trace *trace = opt->value;
4653
4654 if (!list_empty(&trace->evlist->core.entries))
4655 return parse_cgroups(opt, str, unset);
4656
4657 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
4658
4659 return 0;
4660}
4661
4662static int trace__config(const char *var, const char *value, void *arg)
4663{
4664 struct trace *trace = arg;
4665 int err = 0;
4666
4667 if (!strcmp(var, "trace.add_events")) {
4668 trace->perfconfig_events = strdup(value);
4669 if (trace->perfconfig_events == NULL) {
4670 pr_err("Not enough memory for %s\n", "trace.add_events");
4671 return -1;
4672 }
4673 } else if (!strcmp(var, "trace.show_timestamp")) {
4674 trace->show_tstamp = perf_config_bool(var, value);
4675 } else if (!strcmp(var, "trace.show_duration")) {
4676 trace->show_duration = perf_config_bool(var, value);
4677 } else if (!strcmp(var, "trace.show_arg_names")) {
4678 trace->show_arg_names = perf_config_bool(var, value);
4679 if (!trace->show_arg_names)
4680 trace->show_zeros = true;
4681 } else if (!strcmp(var, "trace.show_zeros")) {
4682 bool new_show_zeros = perf_config_bool(var, value);
4683 if (!trace->show_arg_names && !new_show_zeros) {
4684 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n");
4685 goto out;
4686 }
4687 trace->show_zeros = new_show_zeros;
4688 } else if (!strcmp(var, "trace.show_prefix")) {
4689 trace->show_string_prefix = perf_config_bool(var, value);
4690 } else if (!strcmp(var, "trace.no_inherit")) {
4691 trace->opts.no_inherit = perf_config_bool(var, value);
4692 } else if (!strcmp(var, "trace.args_alignment")) {
4693 int args_alignment = 0;
4694 if (perf_config_int(&args_alignment, var, value) == 0)
4695 trace->args_alignment = args_alignment;
4696 } else if (!strcmp(var, "trace.tracepoint_beautifiers")) {
4697 if (strcasecmp(value, "libtraceevent") == 0)
4698 trace->libtraceevent_print = true;
4699 else if (strcasecmp(value, "libbeauty") == 0)
4700 trace->libtraceevent_print = false;
4701 }
4702out:
4703 return err;
4704}
4705
4706int cmd_trace(int argc, const char **argv)
4707{
4708 const char *trace_usage[] = {
4709 "perf trace [<options>] [<command>]",
4710 "perf trace [<options>] -- <command> [<options>]",
4711 "perf trace record [<options>] [<command>]",
4712 "perf trace record [<options>] -- <command> [<options>]",
4713 NULL
4714 };
4715 struct trace trace = {
4716 .opts = {
4717 .target = {
4718 .uid = UINT_MAX,
4719 .uses_mmap = true,
4720 },
4721 .user_freq = UINT_MAX,
4722 .user_interval = ULLONG_MAX,
4723 .no_buffering = true,
4724 .mmap_pages = UINT_MAX,
4725 },
4726 .output = stderr,
4727 .show_comm = true,
4728 .show_tstamp = true,
4729 .show_duration = true,
4730 .show_arg_names = true,
4731 .args_alignment = 70,
4732 .trace_syscalls = false,
4733 .kernel_syscallchains = false,
4734 .max_stack = UINT_MAX,
4735 .max_events = ULONG_MAX,
4736 };
4737 const char *map_dump_str = NULL;
4738 const char *output_name = NULL;
4739 const struct option trace_options[] = {
4740 OPT_CALLBACK('e', "event", &trace, "event",
4741 "event/syscall selector. use 'perf list' to list available events",
4742 trace__parse_events_option),
4743 OPT_CALLBACK(0, "filter", &trace.evlist, "filter",
4744 "event filter", parse_filter),
4745 OPT_BOOLEAN(0, "comm", &trace.show_comm,
4746 "show the thread COMM next to its id"),
4747 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
4748 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
4749 trace__parse_events_option),
4750 OPT_STRING('o', "output", &output_name, "file", "output file name"),
4751 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
4752 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
4753 "trace events on existing process id"),
4754 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
4755 "trace events on existing thread id"),
4756 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
4757 "pids to filter (by the kernel)", trace__set_filter_pids_from_option),
4758 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
4759 "system-wide collection from all CPUs"),
4760 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
4761 "list of cpus to monitor"),
4762 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
4763 "child tasks do not inherit counters"),
4764 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
4765 "number of mmap data pages",
4766 perf_evlist__parse_mmap_pages),
4767 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
4768 "user to profile"),
4769 OPT_CALLBACK(0, "duration", &trace, "float",
4770 "show only events with duration > N.M ms",
4771 trace__set_duration),
4772#ifdef HAVE_LIBBPF_SUPPORT
4773 OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"),
4774#endif
4775 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
4776 OPT_INCR('v', "verbose", &verbose, "be more verbose"),
4777 OPT_BOOLEAN('T', "time", &trace.full_time,
4778 "Show full timestamp, not time relative to first start"),
4779 OPT_BOOLEAN(0, "failure", &trace.failure_only,
4780 "Show only syscalls that failed"),
4781 OPT_BOOLEAN('s', "summary", &trace.summary_only,
4782 "Show only syscall summary with statistics"),
4783 OPT_BOOLEAN('S', "with-summary", &trace.summary,
4784 "Show all syscalls and summary with statistics"),
4785 OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary,
4786 "Show errno stats per syscall, use with -s or -S"),
4787 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
4788 "Trace pagefaults", parse_pagefaults, "maj"),
4789 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
4790 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
4791 OPT_CALLBACK(0, "call-graph", &trace.opts,
4792 "record_mode[,record_size]", record_callchain_help,
4793 &record_parse_callchain_opt),
4794 OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print,
4795 "Use libtraceevent to print the tracepoint arguments."),
4796 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
4797 "Show the kernel callchains on the syscall exit path"),
4798 OPT_ULONG(0, "max-events", &trace.max_events,
4799 "Set the maximum number of events to print, exit after that is reached. "),
4800 OPT_UINTEGER(0, "min-stack", &trace.min_stack,
4801 "Set the minimum stack depth when parsing the callchain, "
4802 "anything below the specified depth will be ignored."),
4803 OPT_UINTEGER(0, "max-stack", &trace.max_stack,
4804 "Set the maximum stack depth when parsing the callchain, "
4805 "anything beyond the specified depth will be ignored. "
4806 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
4807 OPT_BOOLEAN(0, "sort-events", &trace.sort_events,
4808 "Sort batch of events before processing, use if getting out of order events"),
4809 OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
4810 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
4811 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
4812 "per thread proc mmap processing timeout in ms"),
4813 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
4814 trace__parse_cgroups),
4815 OPT_INTEGER('D', "delay", &trace.opts.initial_delay,
4816 "ms to wait before starting measurement after program "
4817 "start"),
4818 OPTS_EVSWITCH(&trace.evswitch),
4819 OPT_END()
4820 };
4821 bool __maybe_unused max_stack_user_set = true;
4822 bool mmap_pages_user_set = true;
4823 struct evsel *evsel;
4824 const char * const trace_subcommands[] = { "record", NULL };
4825 int err = -1;
4826 char bf[BUFSIZ];
4827
4828 signal(SIGSEGV, sighandler_dump_stack);
4829 signal(SIGFPE, sighandler_dump_stack);
4830
4831 trace.evlist = evlist__new();
4832 trace.sctbl = syscalltbl__new();
4833
4834 if (trace.evlist == NULL || trace.sctbl == NULL) {
4835 pr_err("Not enough memory to run!\n");
4836 err = -ENOMEM;
4837 goto out;
4838 }
4839
4840 /*
4841 * Parsing .perfconfig may entail creating a BPF event, that may need
4842 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting
4843 * is too small. This affects just this process, not touching the
4844 * global setting. If it fails we'll get something in 'perf trace -v'
4845 * to help diagnose the problem.
4846 */
4847 rlimit__bump_memlock();
4848
4849 err = perf_config(trace__config, &trace);
4850 if (err)
4851 goto out;
4852
4853 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
4854 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
4855
4856 /*
4857 * Here we already passed thru trace__parse_events_option() and it has
4858 * already figured out if -e syscall_name, if not but if --event
4859 * foo:bar was used, the user is interested _just_ in those, say,
4860 * tracepoint events, not in the strace-like syscall-name-based mode.
4861 *
4862 * This is important because we need to check if strace-like mode is
4863 * needed to decided if we should filter out the eBPF
4864 * __augmented_syscalls__ code, if it is in the mix, say, via
4865 * .perfconfig trace.add_events, and filter those out.
4866 */
4867 if (!trace.trace_syscalls && !trace.trace_pgfaults &&
4868 trace.evlist->core.nr_entries == 0 /* Was --events used? */) {
4869 trace.trace_syscalls = true;
4870 }
4871 /*
4872 * Now that we have --verbose figured out, lets see if we need to parse
4873 * events from .perfconfig, so that if those events fail parsing, say some
4874 * BPF program fails, then we'll be able to use --verbose to see what went
4875 * wrong in more detail.
4876 */
4877 if (trace.perfconfig_events != NULL) {
4878 struct parse_events_error parse_err;
4879
4880 bzero(&parse_err, sizeof(parse_err));
4881 err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err);
4882 if (err) {
4883 parse_events_print_error(&parse_err, trace.perfconfig_events);
4884 goto out;
4885 }
4886 }
4887
4888 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
4889 usage_with_options_msg(trace_usage, trace_options,
4890 "cgroup monitoring only available in system-wide mode");
4891 }
4892
4893 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__");
4894 if (IS_ERR(evsel)) {
4895 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf));
4896 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf);
4897 goto out;
4898 }
4899
4900 if (evsel) {
4901 trace.syscalls.events.augmented = evsel;
4902
4903 evsel = perf_evlist__find_tracepoint_by_name(trace.evlist, "raw_syscalls:sys_enter");
4904 if (evsel == NULL) {
4905 pr_err("ERROR: raw_syscalls:sys_enter not found in the augmented BPF object\n");
4906 goto out;
4907 }
4908
4909 if (evsel->bpf_obj == NULL) {
4910 pr_err("ERROR: raw_syscalls:sys_enter not associated to a BPF object\n");
4911 goto out;
4912 }
4913
4914 trace.bpf_obj = evsel->bpf_obj;
4915
4916 /*
4917 * If we have _just_ the augmenter event but don't have a
4918 * explicit --syscalls, then assume we want all strace-like
4919 * syscalls:
4920 */
4921 if (!trace.trace_syscalls && trace__only_augmented_syscalls_evsels(&trace))
4922 trace.trace_syscalls = true;
4923 /*
4924 * So, if we have a syscall augmenter, but trace_syscalls, aka
4925 * strace-like syscall tracing is not set, then we need to trow
4926 * away the augmenter, i.e. all the events that were created
4927 * from that BPF object file.
4928 *
4929 * This is more to fix the current .perfconfig trace.add_events
4930 * style of setting up the strace-like eBPF based syscall point
4931 * payload augmenter.
4932 *
4933 * All this complexity will be avoided by adding an alternative
4934 * to trace.add_events in the form of
4935 * trace.bpf_augmented_syscalls, that will be only parsed if we
4936 * need it.
4937 *
4938 * .perfconfig trace.add_events is still useful if we want, for
4939 * instance, have msr_write.msr in some .perfconfig profile based
4940 * 'perf trace --config determinism.profile' mode, where for some
4941 * particular goal/workload type we want a set of events and
4942 * output mode (with timings, etc) instead of having to add
4943 * all via the command line.
4944 *
4945 * Also --config to specify an alternate .perfconfig file needs
4946 * to be implemented.
4947 */
4948 if (!trace.trace_syscalls) {
4949 trace__delete_augmented_syscalls(&trace);
4950 } else {
4951 trace__set_bpf_map_filtered_pids(&trace);
4952 trace__set_bpf_map_syscalls(&trace);
4953 trace.syscalls.unaugmented_prog = trace__find_bpf_program_by_title(&trace, "!raw_syscalls:unaugmented");
4954 }
4955 }
4956
4957 err = bpf__setup_stdout(trace.evlist);
4958 if (err) {
4959 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf));
4960 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf);
4961 goto out;
4962 }
4963
4964 err = -1;
4965
4966 if (map_dump_str) {
4967 trace.dump.map = trace__find_bpf_map_by_name(&trace, map_dump_str);
4968 if (trace.dump.map == NULL) {
4969 pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str);
4970 goto out;
4971 }
4972 }
4973
4974 if (trace.trace_pgfaults) {
4975 trace.opts.sample_address = true;
4976 trace.opts.sample_time = true;
4977 }
4978
4979 if (trace.opts.mmap_pages == UINT_MAX)
4980 mmap_pages_user_set = false;
4981
4982 if (trace.max_stack == UINT_MAX) {
4983 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
4984 max_stack_user_set = false;
4985 }
4986
4987#ifdef HAVE_DWARF_UNWIND_SUPPORT
4988 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
4989 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
4990 }
4991#endif
4992
4993 if (callchain_param.enabled) {
4994 if (!mmap_pages_user_set && geteuid() == 0)
4995 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
4996
4997 symbol_conf.use_callchain = true;
4998 }
4999
5000 if (trace.evlist->core.nr_entries > 0) {
5001 evlist__set_default_evsel_handler(trace.evlist, trace__event_handler);
5002 if (evlist__set_syscall_tp_fields(trace.evlist)) {
5003 perror("failed to set syscalls:* tracepoint fields");
5004 goto out;
5005 }
5006 }
5007
5008 if (trace.sort_events) {
5009 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace);
5010 ordered_events__set_copy_on_queue(&trace.oe.data, true);
5011 }
5012
5013 /*
5014 * If we are augmenting syscalls, then combine what we put in the
5015 * __augmented_syscalls__ BPF map with what is in the
5016 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF,
5017 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit.
5018 *
5019 * We'll switch to look at two BPF maps, one for sys_enter and the
5020 * other for sys_exit when we start augmenting the sys_exit paths with
5021 * buffers that are being copied from kernel to userspace, think 'read'
5022 * syscall.
5023 */
5024 if (trace.syscalls.events.augmented) {
5025 evlist__for_each_entry(trace.evlist, evsel) {
5026 bool raw_syscalls_sys_exit = strcmp(evsel__name(evsel), "raw_syscalls:sys_exit") == 0;
5027
5028 if (raw_syscalls_sys_exit) {
5029 trace.raw_augmented_syscalls = true;
5030 goto init_augmented_syscall_tp;
5031 }
5032
5033 if (trace.syscalls.events.augmented->priv == NULL &&
5034 strstr(evsel__name(evsel), "syscalls:sys_enter")) {
5035 struct evsel *augmented = trace.syscalls.events.augmented;
5036 if (evsel__init_augmented_syscall_tp(augmented, evsel) ||
5037 evsel__init_augmented_syscall_tp_args(augmented))
5038 goto out;
5039 /*
5040 * Augmented is __augmented_syscalls__ BPF_OUTPUT event
5041 * Above we made sure we can get from the payload the tp fields
5042 * that we get from syscalls:sys_enter tracefs format file.
5043 */
5044 augmented->handler = trace__sys_enter;
5045 /*
5046 * Now we do the same for the *syscalls:sys_enter event so that
5047 * if we handle it directly, i.e. if the BPF prog returns 0 so
5048 * as not to filter it, then we'll handle it just like we would
5049 * for the BPF_OUTPUT one:
5050 */
5051 if (evsel__init_augmented_syscall_tp(evsel, evsel) ||
5052 evsel__init_augmented_syscall_tp_args(evsel))
5053 goto out;
5054 evsel->handler = trace__sys_enter;
5055 }
5056
5057 if (strstarts(evsel__name(evsel), "syscalls:sys_exit_")) {
5058 struct syscall_tp *sc;
5059init_augmented_syscall_tp:
5060 if (evsel__init_augmented_syscall_tp(evsel, evsel))
5061 goto out;
5062 sc = __evsel__syscall_tp(evsel);
5063 /*
5064 * For now with BPF raw_augmented we hook into
5065 * raw_syscalls:sys_enter and there we get all
5066 * 6 syscall args plus the tracepoint common
5067 * fields and the syscall_nr (another long).
5068 * So we check if that is the case and if so
5069 * don't look after the sc->args_size but
5070 * always after the full raw_syscalls:sys_enter
5071 * payload, which is fixed.
5072 *
5073 * We'll revisit this later to pass
5074 * s->args_size to the BPF augmenter (now
5075 * tools/perf/examples/bpf/augmented_raw_syscalls.c,
5076 * so that it copies only what we need for each
5077 * syscall, like what happens when we use
5078 * syscalls:sys_enter_NAME, so that we reduce
5079 * the kernel/userspace traffic to just what is
5080 * needed for each syscall.
5081 */
5082 if (trace.raw_augmented_syscalls)
5083 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset;
5084 evsel__init_augmented_syscall_tp_ret(evsel);
5085 evsel->handler = trace__sys_exit;
5086 }
5087 }
5088 }
5089
5090 if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
5091 return trace__record(&trace, argc-1, &argv[1]);
5092
5093 /* Using just --errno-summary will trigger --summary */
5094 if (trace.errno_summary && !trace.summary && !trace.summary_only)
5095 trace.summary_only = true;
5096
5097 /* summary_only implies summary option, but don't overwrite summary if set */
5098 if (trace.summary_only)
5099 trace.summary = trace.summary_only;
5100
5101 if (output_name != NULL) {
5102 err = trace__open_output(&trace, output_name);
5103 if (err < 0) {
5104 perror("failed to create output file");
5105 goto out;
5106 }
5107 }
5108
5109 err = evswitch__init(&trace.evswitch, trace.evlist, stderr);
5110 if (err)
5111 goto out_close;
5112
5113 err = target__validate(&trace.opts.target);
5114 if (err) {
5115 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5116 fprintf(trace.output, "%s", bf);
5117 goto out_close;
5118 }
5119
5120 err = target__parse_uid(&trace.opts.target);
5121 if (err) {
5122 target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5123 fprintf(trace.output, "%s", bf);
5124 goto out_close;
5125 }
5126
5127 if (!argc && target__none(&trace.opts.target))
5128 trace.opts.target.system_wide = true;
5129
5130 if (input_name)
5131 err = trace__replay(&trace);
5132 else
5133 err = trace__run(&trace, argc, argv);
5134
5135out_close:
5136 if (output_name != NULL)
5137 fclose(trace.output);
5138out:
5139 zfree(&trace.perfconfig_events);
5140 return err;
5141}