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 <api/fs/tracing_path.h>
19	#ifdef HAVE_LIBBPF_SUPPORT
20	#include <bpf/bpf.h>
21	#include <bpf/libbpf.h>
22	#ifdef HAVE_BPF_SKEL
23	#include "bpf_skel/augmented_raw_syscalls.skel.h"
24	#endif
25	#endif
26	#include "util/bpf_map.h"
27	#include "util/rlimit.h"
28	#include "builtin.h"
29	#include "util/cgroup.h"
30	#include "util/color.h"
31	#include "util/config.h"
32	#include "util/debug.h"
33	#include "util/dso.h"
34	#include "util/env.h"
35	#include "util/event.h"
36	#include "util/evsel.h"
37	#include "util/evsel_fprintf.h"
38	#include "util/synthetic-events.h"
39	#include "util/evlist.h"
40	#include "util/evswitch.h"
41	#include "util/mmap.h"
42	#include <subcmd/pager.h>
43	#include <subcmd/exec-cmd.h>
44	#include "util/machine.h"
45	#include "util/map.h"
46	#include "util/symbol.h"
47	#include "util/path.h"
48	#include "util/session.h"
49	#include "util/thread.h"
50	#include <subcmd/parse-options.h>
51	#include "util/strlist.h"
52	#include "util/intlist.h"
53	#include "util/thread_map.h"
54	#include "util/stat.h"
55	#include "util/tool.h"
56	#include "util/util.h"
57	#include "trace/beauty/beauty.h"
58	#include "trace-event.h"
59	#include "util/parse-events.h"
60	#include "util/tracepoint.h"
61	#include "callchain.h"
62	#include "print_binary.h"
63	#include "string2.h"
64	#include "syscalltbl.h"
65	#include "rb_resort.h"
66	#include "../perf.h"
67
68	#include <errno.h>
69	#include <inttypes.h>
70	#include <poll.h>
71	#include <signal.h>
72	#include <stdlib.h>
73	#include <string.h>
74	#include <linux/err.h>
75	#include <linux/filter.h>
76	#include <linux/kernel.h>
77	#include <linux/random.h>
78	#include <linux/stringify.h>
79	#include <linux/time64.h>
80	#include <linux/zalloc.h>
81	#include <fcntl.h>
82	#include <sys/sysmacros.h>
83
84	#include <linux/ctype.h>
85	#include <perf/mmap.h>
86
87	#ifdef HAVE_LIBTRACEEVENT
88	#include <traceevent/event-parse.h>
89	#endif
90
91	#ifndef O_CLOEXEC
92	# define O_CLOEXEC 02000000
93	#endif
94
95	#ifndef F_LINUX_SPECIFIC_BASE
96	# define F_LINUX_SPECIFIC_BASE 1024
97	#endif
98
99	#define RAW_SYSCALL_ARGS_NUM 6
100
101	/*
102	* strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100
103	*/
104	struct syscall_arg_fmt {
105	size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
106	bool (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val);
107	unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val);
108	void *parm;
109	const char *name;
110	u16 nr_entries; // for arrays
111	bool show_zero;
112	};
113
114	struct syscall_fmt {
115	const char *name;
116	const char *alias;
117	struct {
118	const char *sys_enter,
119	*sys_exit;
120	} bpf_prog_name;
121	struct syscall_arg_fmt arg[RAW_SYSCALL_ARGS_NUM];
122	u8 nr_args;
123	bool errpid;
124	bool timeout;
125	bool hexret;
126	};
127
128	struct trace {
129	struct perf_tool tool;
130	struct syscalltbl *sctbl;
131	struct {
132	struct syscall *table;
133	struct {
134	struct evsel *sys_enter,
135	*sys_exit,
136	*bpf_output;
137	} events;
138	} syscalls;
139	#ifdef HAVE_BPF_SKEL
140	struct augmented_raw_syscalls_bpf *skel;
141	#endif
142	struct record_opts opts;
143	struct evlist *evlist;
144	struct machine *host;
145	struct thread *current;
146	struct cgroup *cgroup;
147	u64 base_time;
148	FILE *output;
149	unsigned long nr_events;
150	unsigned long nr_events_printed;
151	unsigned long max_events;
152	struct evswitch evswitch;
153	struct strlist *ev_qualifier;
154	struct {
155	size_t nr;
156	int *entries;
157	} ev_qualifier_ids;
158	struct {
159	size_t nr;
160	pid_t *entries;
161	struct bpf_map *map;
162	} filter_pids;
163	double duration_filter;
164	double runtime_ms;
165	struct {
166	u64 vfs_getname,
167	proc_getname;
168	} stats;
169	unsigned int max_stack;
170	unsigned int min_stack;
171	int raw_augmented_syscalls_args_size;
172	bool raw_augmented_syscalls;
173	bool fd_path_disabled;
174	bool sort_events;
175	bool not_ev_qualifier;
176	bool live;
177	bool full_time;
178	bool sched;
179	bool multiple_threads;
180	bool summary;
181	bool summary_only;
182	bool errno_summary;
183	bool failure_only;
184	bool show_comm;
185	bool print_sample;
186	bool show_tool_stats;
187	bool trace_syscalls;
188	bool libtraceevent_print;
189	bool kernel_syscallchains;
190	s16 args_alignment;
191	bool show_tstamp;
192	bool show_duration;
193	bool show_zeros;
194	bool show_arg_names;
195	bool show_string_prefix;
196	bool force;
197	bool vfs_getname;
198	int trace_pgfaults;
199	char *perfconfig_events;
200	struct {
201	struct ordered_events data;
202	u64 last;
203	} oe;
204	};
205
206	struct tp_field {
207	int offset;
208	union {
209	u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
210	void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
211	};
212	};
213
214	#define TP_UINT_FIELD(bits) \
215	static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
216	{ \
217	u##bits value; \
218	memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
219	return value; \
220	}
221
222	TP_UINT_FIELD(8);
223	TP_UINT_FIELD(16);
224	TP_UINT_FIELD(32);
225	TP_UINT_FIELD(64);
226
227	#define TP_UINT_FIELD__SWAPPED(bits) \
228	static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
229	{ \
230	u##bits value; \
231	memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
232	return bswap_##bits(value);\
233	}
234
235	TP_UINT_FIELD__SWAPPED(16);
236	TP_UINT_FIELD__SWAPPED(32);
237	TP_UINT_FIELD__SWAPPED(64);
238
239	static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap)
240	{
241	field->offset = offset;
242
243	switch (size) {
244	case 1:
245	field->integer = tp_field__u8;
246	break;
247	case 2:
248	field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
249	break;
250	case 4:
251	field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
252	break;
253	case 8:
254	field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
255	break;
256	default:
257	return -1;
258	}
259
260	return 0;
261	}
262
263	static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap)
264	{
265	return __tp_field__init_uint(field, size: format_field->size, offset: format_field->offset, needs_swap);
266	}
267
268	static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
269	{
270	return sample->raw_data + field->offset;
271	}
272
273	static int __tp_field__init_ptr(struct tp_field *field, int offset)
274	{
275	field->offset = offset;
276	field->pointer = tp_field__ptr;
277	return 0;
278	}
279
280	static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field)
281	{
282	return __tp_field__init_ptr(field, offset: format_field->offset);
283	}
284
285	struct syscall_tp {
286	struct tp_field id;
287	union {
288	struct tp_field args, ret;
289	};
290	};
291
292	/*
293	* The evsel->priv as used by 'perf trace'
294	* sc: for raw_syscalls:sys_{enter,exit} and syscalls:sys_{enter,exit}_SYSCALLNAME
295	* fmt: for all the other tracepoints
296	*/
297	struct evsel_trace {
298	struct syscall_tp sc;
299	struct syscall_arg_fmt *fmt;
300	};
301
302	static struct evsel_trace *evsel_trace__new(void)
303	{
304	return zalloc(sizeof(struct evsel_trace));
305	}
306
307	static void evsel_trace__delete(struct evsel_trace *et)
308	{
309	if (et == NULL)
310	return;
311
312	zfree(&et->fmt);
313	free(et);
314	}
315
316	/*
317	* Used with raw_syscalls:sys_{enter,exit} and with the
318	* syscalls:sys_{enter,exit}_SYSCALL tracepoints
319	*/
320	static inline struct syscall_tp *__evsel__syscall_tp(struct evsel *evsel)
321	{
322	struct evsel_trace *et = evsel->priv;
323
324	return &et->sc;
325	}
326
327	static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel)
328	{
329	if (evsel->priv == NULL) {
330	evsel->priv = evsel_trace__new();
331	if (evsel->priv == NULL)
332	return NULL;
333	}
334
335	return __evsel__syscall_tp(evsel);
336	}
337
338	/*
339	* Used with all the other tracepoints.
340	*/
341	static inline struct syscall_arg_fmt *__evsel__syscall_arg_fmt(struct evsel *evsel)
342	{
343	struct evsel_trace *et = evsel->priv;
344
345	return et->fmt;
346	}
347
348	static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel)
349	{
350	struct evsel_trace *et = evsel->priv;
351
352	if (evsel->priv == NULL) {
353	et = evsel->priv = evsel_trace__new();
354
355	if (et == NULL)
356	return NULL;
357	}
358
359	if (et->fmt == NULL) {
360	et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt));
361	if (et->fmt == NULL)
362	goto out_delete;
363	}
364
365	return __evsel__syscall_arg_fmt(evsel);
366
367	out_delete:
368	evsel_trace__delete(et: evsel->priv);
369	evsel->priv = NULL;
370	return NULL;
371	}
372
373	static int evsel__init_tp_uint_field(struct evsel *evsel, struct tp_field *field, const char *name)
374	{
375	struct tep_format_field *format_field = evsel__field(evsel, name);
376
377	if (format_field == NULL)
378	return -1;
379
380	return tp_field__init_uint(field, format_field, needs_swap: evsel->needs_swap);
381	}
382
383	#define perf_evsel__init_sc_tp_uint_field(evsel, name) \
384	({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
385	evsel__init_tp_uint_field(evsel, &sc->name, #name); })
386
387	static int evsel__init_tp_ptr_field(struct evsel *evsel, struct tp_field *field, const char *name)
388	{
389	struct tep_format_field *format_field = evsel__field(evsel, name);
390
391	if (format_field == NULL)
392	return -1;
393
394	return tp_field__init_ptr(field, format_field);
395	}
396
397	#define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
398	({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
399	evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
400
401	static void evsel__delete_priv(struct evsel *evsel)
402	{
403	zfree(&evsel->priv);
404	evsel__delete(evsel);
405	}
406
407	static int evsel__init_syscall_tp(struct evsel *evsel)
408	{
409	struct syscall_tp *sc = evsel__syscall_tp(evsel);
410
411	if (sc != NULL) {
412	if (evsel__init_tp_uint_field(evsel, field: &sc->id, name: "__syscall_nr") &&
413	evsel__init_tp_uint_field(evsel, field: &sc->id, name: "nr"))
414	return -ENOENT;
415
416	return 0;
417	}
418
419	return -ENOMEM;
420	}
421
422	static int evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp)
423	{
424	struct syscall_tp *sc = evsel__syscall_tp(evsel);
425
426	if (sc != NULL) {
427	struct tep_format_field *syscall_id = evsel__field(evsel: tp, name: "id");
428	if (syscall_id == NULL)
429	syscall_id = evsel__field(evsel: tp, name: "__syscall_nr");
430	if (syscall_id == NULL ||
431	__tp_field__init_uint(field: &sc->id, size: syscall_id->size, offset: syscall_id->offset, needs_swap: evsel->needs_swap))
432	return -EINVAL;
433
434	return 0;
435	}
436
437	return -ENOMEM;
438	}
439
440	static int evsel__init_augmented_syscall_tp_args(struct evsel *evsel)
441	{
442	struct syscall_tp *sc = __evsel__syscall_tp(evsel);
443
444	return __tp_field__init_ptr(field: &sc->args, offset: sc->id.offset + sizeof(u64));
445	}
446
447	static int evsel__init_augmented_syscall_tp_ret(struct evsel *evsel)
448	{
449	struct syscall_tp *sc = __evsel__syscall_tp(evsel);
450
451	return __tp_field__init_uint(field: &sc->ret, size: sizeof(u64), offset: sc->id.offset + sizeof(u64), needs_swap: evsel->needs_swap);
452	}
453
454	static int evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler)
455	{
456	if (evsel__syscall_tp(evsel) != NULL) {
457	if (perf_evsel__init_sc_tp_uint_field(evsel, id))
458	return -ENOENT;
459
460	evsel->handler = handler;
461	return 0;
462	}
463
464	return -ENOMEM;
465	}
466
467	static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
468	{
469	struct evsel *evsel = evsel__newtp("raw_syscalls", direction);
470
471	/* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
472	if (IS_ERR(ptr: evsel))
473	evsel = evsel__newtp("syscalls", direction);
474
475	if (IS_ERR(ptr: evsel))
476	return NULL;
477
478	if (evsel__init_raw_syscall_tp(evsel, handler))
479	goto out_delete;
480
481	return evsel;
482
483	out_delete:
484	evsel__delete_priv(evsel);
485	return NULL;
486	}
487
488	#define perf_evsel__sc_tp_uint(evsel, name, sample) \
489	({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
490	fields->name.integer(&fields->name, sample); })
491
492	#define perf_evsel__sc_tp_ptr(evsel, name, sample) \
493	({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
494	fields->name.pointer(&fields->name, sample); })
495
496	size_t strarray__scnprintf_suffix(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_suffix, int val)
497	{
498	int idx = val - sa->offset;
499
500	if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
501	size_t printed = scnprintf(buf: bf, size, fmt: intfmt, val);
502	if (show_suffix)
503	printed += scnprintf(buf: bf + printed, size: size - printed, fmt: " /* %s??? */", sa->prefix);
504	return printed;
505	}
506
507	return scnprintf(buf: bf, size, fmt: "%s%s", sa->entries[idx], show_suffix ? sa->prefix : "");
508	}
509
510	size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
511	{
512	int idx = val - sa->offset;
513
514	if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
515	size_t printed = scnprintf(buf: bf, size, fmt: intfmt, val);
516	if (show_prefix)
517	printed += scnprintf(buf: bf + printed, size: size - printed, fmt: " /* %s??? */", sa->prefix);
518	return printed;
519	}
520
521	return scnprintf(buf: bf, size, fmt: "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
522	}
523
524	static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
525	const char *intfmt,
526	struct syscall_arg *arg)
527	{
528	return strarray__scnprintf(sa: arg->parm, bf, size, intfmt, show_prefix: arg->show_string_prefix, val: arg->val);
529	}
530
531	static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
532	struct syscall_arg *arg)
533	{
534	return __syscall_arg__scnprintf_strarray(bf, size, intfmt: "%d", arg);
535	}
536
537	#define SCA_STRARRAY syscall_arg__scnprintf_strarray
538
539	bool syscall_arg__strtoul_strarray(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
540	{
541	return strarray__strtoul(sa: arg->parm, bf, size, ret);
542	}
543
544	bool syscall_arg__strtoul_strarray_flags(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
545	{
546	return strarray__strtoul_flags(sa: arg->parm, bf, size, ret);
547	}
548
549	bool syscall_arg__strtoul_strarrays(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
550	{
551	return strarrays__strtoul(sas: arg->parm, bf, size, ret);
552	}
553
554	size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg)
555	{
556	return strarray__scnprintf_flags(sa: arg->parm, bf, size, show_prefix: arg->show_string_prefix, flags: arg->val);
557	}
558
559	size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
560	{
561	size_t printed;
562	int i;
563
564	for (i = 0; i < sas->nr_entries; ++i) {
565	struct strarray *sa = sas->entries[i];
566	int idx = val - sa->offset;
567
568	if (idx >= 0 && idx < sa->nr_entries) {
569	if (sa->entries[idx] == NULL)
570	break;
571	return scnprintf(buf: bf, size, fmt: "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
572	}
573	}
574
575	printed = scnprintf(buf: bf, size, fmt: intfmt, val);
576	if (show_prefix)
577	printed += scnprintf(buf: bf + printed, size: size - printed, fmt: " /* %s??? */", sas->entries[0]->prefix);
578	return printed;
579	}
580
581	bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret)
582	{
583	int i;
584
585	for (i = 0; i < sa->nr_entries; ++i) {
586	if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') {
587	*ret = sa->offset + i;
588	return true;
589	}
590	}
591
592	return false;
593	}
594
595	bool strarray__strtoul_flags(struct strarray *sa, char *bf, size_t size, u64 *ret)
596	{
597	u64 val = 0;
598	char *tok = bf, *sep, *end;
599
600	*ret = 0;
601
602	while (size != 0) {
603	int toklen = size;
604
605	sep = memchr(p: tok, c: '|', size);
606	if (sep != NULL) {
607	size -= sep - tok + 1;
608
609	end = sep - 1;
610	while (end > tok && isspace(*end))
611	--end;
612
613	toklen = end - tok + 1;
614	}
615
616	while (isspace(*tok))
617	++tok;
618
619	if (isalpha(*tok) || *tok == '_') {
620	if (!strarray__strtoul(sa, bf: tok, size: toklen, ret: &val))
621	return false;
622	} else
623	val = strtoul(tok, NULL, 0);
624
625	*ret |= (1 << (val - 1));
626
627	if (sep == NULL)
628	break;
629	tok = sep + 1;
630	}
631
632	return true;
633	}
634
635	bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret)
636	{
637	int i;
638
639	for (i = 0; i < sas->nr_entries; ++i) {
640	struct strarray *sa = sas->entries[i];
641
642	if (strarray__strtoul(sa, bf, size, ret))
643	return true;
644	}
645
646	return false;
647	}
648
649	size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
650	struct syscall_arg *arg)
651	{
652	return strarrays__scnprintf(sas: arg->parm, bf, size, intfmt: "%d", show_prefix: arg->show_string_prefix, val: arg->val);
653	}
654
655	#ifndef AT_FDCWD
656	#define AT_FDCWD -100
657	#endif
658
659	static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
660	struct syscall_arg *arg)
661	{
662	int fd = arg->val;
663	const char *prefix = "AT_FD";
664
665	if (fd == AT_FDCWD)
666	return scnprintf(buf: bf, size, fmt: "%s%s", arg->show_string_prefix ? prefix : "", "CWD");
667
668	return syscall_arg__scnprintf_fd(bf, size, arg);
669	}
670
671	#define SCA_FDAT syscall_arg__scnprintf_fd_at
672
673	static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
674	struct syscall_arg *arg);
675
676	#define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
677
678	size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
679	{
680	return scnprintf(buf: bf, size, fmt: "%#lx", arg->val);
681	}
682
683	size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg)
684	{
685	if (arg->val == 0)
686	return scnprintf(buf: bf, size, fmt: "NULL");
687	return syscall_arg__scnprintf_hex(bf, size, arg);
688	}
689
690	size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
691	{
692	return scnprintf(buf: bf, size, fmt: "%d", arg->val);
693	}
694
695	size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
696	{
697	return scnprintf(buf: bf, size, fmt: "%ld", arg->val);
698	}
699
700	static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg)
701	{
702	// XXX Hey, maybe for sched:sched_switch prev/next comm fields we can
703	// fill missing comms using thread__set_comm()...
704	// here or in a special syscall_arg__scnprintf_pid_sched_tp...
705	return scnprintf(buf: bf, size, fmt: "\"%-.*s\"", arg->fmt->nr_entries ?: arg->len, arg->val);
706	}
707
708	#define SCA_CHAR_ARRAY syscall_arg__scnprintf_char_array
709
710	static const char *bpf_cmd[] = {
711	"MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
712	"MAP_GET_NEXT_KEY", "PROG_LOAD", "OBJ_PIN", "OBJ_GET", "PROG_ATTACH",
713	"PROG_DETACH", "PROG_TEST_RUN", "PROG_GET_NEXT_ID", "MAP_GET_NEXT_ID",
714	"PROG_GET_FD_BY_ID", "MAP_GET_FD_BY_ID", "OBJ_GET_INFO_BY_FD",
715	"PROG_QUERY", "RAW_TRACEPOINT_OPEN", "BTF_LOAD", "BTF_GET_FD_BY_ID",
716	"TASK_FD_QUERY", "MAP_LOOKUP_AND_DELETE_ELEM", "MAP_FREEZE",
717	"BTF_GET_NEXT_ID", "MAP_LOOKUP_BATCH", "MAP_LOOKUP_AND_DELETE_BATCH",
718	"MAP_UPDATE_BATCH", "MAP_DELETE_BATCH", "LINK_CREATE", "LINK_UPDATE",
719	"LINK_GET_FD_BY_ID", "LINK_GET_NEXT_ID", "ENABLE_STATS", "ITER_CREATE",
720	"LINK_DETACH", "PROG_BIND_MAP",
721	};
722	static DEFINE_STRARRAY(bpf_cmd, "BPF_");
723
724	static const char *fsmount_flags[] = {
725	[1] = "CLOEXEC",
726	};
727	static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_");
728
729	#include "trace/beauty/generated/fsconfig_arrays.c"
730
731	static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_");
732
733	static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
734	static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1);
735
736	static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
737	static DEFINE_STRARRAY(itimers, "ITIMER_");
738
739	static const char *keyctl_options[] = {
740	"GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
741	"SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
742	"INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
743	"ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
744	"INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
745	};
746	static DEFINE_STRARRAY(keyctl_options, "KEYCTL_");
747
748	static const char *whences[] = { "SET", "CUR", "END",
749	#ifdef SEEK_DATA
750	"DATA",
751	#endif
752	#ifdef SEEK_HOLE
753	"HOLE",
754	#endif
755	};
756	static DEFINE_STRARRAY(whences, "SEEK_");
757
758	static const char *fcntl_cmds[] = {
759	"DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
760	"SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
761	"SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
762	"GETOWNER_UIDS",
763	};
764	static DEFINE_STRARRAY(fcntl_cmds, "F_");
765
766	static const char *fcntl_linux_specific_cmds[] = {
767	"SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
768	"SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
769	"GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
770	};
771
772	static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE);
773
774	static struct strarray *fcntl_cmds_arrays[] = {
775	&strarray__fcntl_cmds,
776	&strarray__fcntl_linux_specific_cmds,
777	};
778
779	static DEFINE_STRARRAYS(fcntl_cmds_arrays);
780
781	static const char *rlimit_resources[] = {
782	"CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
783	"MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
784	"RTTIME",
785	};
786	static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_");
787
788	static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
789	static DEFINE_STRARRAY(sighow, "SIG_");
790
791	static const char *clockid[] = {
792	"REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
793	"MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
794	"REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
795	};
796	static DEFINE_STRARRAY(clockid, "CLOCK_");
797
798	static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
799	struct syscall_arg *arg)
800	{
801	bool show_prefix = arg->show_string_prefix;
802	const char *suffix = "_OK";
803	size_t printed = 0;
804	int mode = arg->val;
805
806	if (mode == F_OK) /* 0 */
807	return scnprintf(buf: bf, size, fmt: "F%s", show_prefix ? suffix : "");
808	#define P_MODE(n) \
809	if (mode & n##_OK) { \
810	printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \
811	mode &= ~n##_OK; \
812	}
813
814	P_MODE(R);
815	P_MODE(W);
816	P_MODE(X);
817	#undef P_MODE
818
819	if (mode)
820	printed += scnprintf(buf: bf + printed, size: size - printed, fmt: "|%#x", mode);
821
822	return printed;
823	}
824
825	#define SCA_ACCMODE syscall_arg__scnprintf_access_mode
826
827	static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
828	struct syscall_arg *arg);
829
830	#define SCA_FILENAME syscall_arg__scnprintf_filename
831
832	static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
833	struct syscall_arg *arg)
834	{
835	bool show_prefix = arg->show_string_prefix;
836	const char *prefix = "O_";
837	int printed = 0, flags = arg->val;
838
839	#define P_FLAG(n) \
840	if (flags & O_##n) { \
841	printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
842	flags &= ~O_##n; \
843	}
844
845	P_FLAG(CLOEXEC);
846	P_FLAG(NONBLOCK);
847	#undef P_FLAG
848
849	if (flags)
850	printed += scnprintf(buf: bf + printed, size: size - printed, fmt: "%s%#x", printed ? "|" : "", flags);
851
852	return printed;
853	}
854
855	#define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
856
857	#ifndef GRND_NONBLOCK
858	#define GRND_NONBLOCK 0x0001
859	#endif
860	#ifndef GRND_RANDOM
861	#define GRND_RANDOM 0x0002
862	#endif
863
864	static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
865	struct syscall_arg *arg)
866	{
867	bool show_prefix = arg->show_string_prefix;
868	const char *prefix = "GRND_";
869	int printed = 0, flags = arg->val;
870
871	#define P_FLAG(n) \
872	if (flags & GRND_##n) { \
873	printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
874	flags &= ~GRND_##n; \
875	}
876
877	P_FLAG(RANDOM);
878	P_FLAG(NONBLOCK);
879	#undef P_FLAG
880
881	if (flags)
882	printed += scnprintf(buf: bf + printed, size: size - printed, fmt: "%s%#x", printed ? "|" : "", flags);
883
884	return printed;
885	}
886
887	#define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
888
889	#define STRARRAY(name, array) \
890	{ .scnprintf = SCA_STRARRAY, \
891	.strtoul = STUL_STRARRAY, \
892	.parm = &strarray__##array, }
893
894	#define STRARRAY_FLAGS(name, array) \
895	{ .scnprintf = SCA_STRARRAY_FLAGS, \
896	.strtoul = STUL_STRARRAY_FLAGS, \
897	.parm = &strarray__##array, }
898
899	#include "trace/beauty/arch_errno_names.c"
900	#include "trace/beauty/eventfd.c"
901	#include "trace/beauty/futex_op.c"
902	#include "trace/beauty/futex_val3.c"
903	#include "trace/beauty/mmap.c"
904	#include "trace/beauty/mode_t.c"
905	#include "trace/beauty/msg_flags.c"
906	#include "trace/beauty/open_flags.c"
907	#include "trace/beauty/perf_event_open.c"
908	#include "trace/beauty/pid.c"
909	#include "trace/beauty/sched_policy.c"
910	#include "trace/beauty/seccomp.c"
911	#include "trace/beauty/signum.c"
912	#include "trace/beauty/socket_type.c"
913	#include "trace/beauty/waitid_options.c"
914
915	static const struct syscall_fmt syscall_fmts[] = {
916	{ .name = "access",
917	.arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, },
918	{ .name = "arch_prctl",
919	.arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ },
920	[1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, },
921	{ .name = "bind",
922	.arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
923	[1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ },
924	[2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
925	{ .name = "bpf",
926	.arg = { [0] = STRARRAY(cmd, bpf_cmd), }, },
927	{ .name = "brk", .hexret = true,
928	.arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, },
929	{ .name = "clock_gettime",
930	.arg = { [0] = STRARRAY(clk_id, clockid), }, },
931	{ .name = "clock_nanosleep",
932	.arg = { [2] = { .scnprintf = SCA_TIMESPEC, /* rqtp */ }, }, },
933	{ .name = "clone", .errpid = true, .nr_args = 5,
934	.arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, },
935	[1] = { .name = "child_stack", .scnprintf = SCA_HEX, },
936	[2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
937	[3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, },
938	[4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, },
939	{ .name = "close",
940	.arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
941	{ .name = "connect",
942	.arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
943	[1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ },
944	[2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
945	{ .name = "epoll_ctl",
946	.arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
947	{ .name = "eventfd2",
948	.arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
949	{ .name = "fchmodat",
950	.arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
951	{ .name = "fchownat",
952	.arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
953	{ .name = "fcntl",
954	.arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */
955	.strtoul = STUL_STRARRAYS,
956	.parm = &strarrays__fcntl_cmds_arrays,
957	.show_zero = true, },
958	[2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, },
959	{ .name = "flock",
960	.arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
961	{ .name = "fsconfig",
962	.arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, },
963	{ .name = "fsmount",
964	.arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags),
965	[2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, },
966	{ .name = "fspick",
967	.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
968	[1] = { .scnprintf = SCA_FILENAME, /* path */ },
969	[2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, },
970	{ .name = "fstat", .alias = "newfstat", },
971	{ .name = "fstatat", .alias = "newfstatat", },
972	{ .name = "futex",
973	.arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
974	[5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
975	{ .name = "futimesat",
976	.arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
977	{ .name = "getitimer",
978	.arg = { [0] = STRARRAY(which, itimers), }, },
979	{ .name = "getpid", .errpid = true, },
980	{ .name = "getpgid", .errpid = true, },
981	{ .name = "getppid", .errpid = true, },
982	{ .name = "getrandom",
983	.arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
984	{ .name = "getrlimit",
985	.arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
986	{ .name = "getsockopt",
987	.arg = { [1] = STRARRAY(level, socket_level), }, },
988	{ .name = "gettid", .errpid = true, },
989	{ .name = "ioctl",
990	.arg = {
991	#if defined(__i386__) || defined(__x86_64__)
992	/*
993	* FIXME: Make this available to all arches.
994	*/
995	[1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
996	[2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
997	#else
998	[2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
999	#endif
1000	{ .name = "kcmp", .nr_args = 5,
1001	.arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, },
1002	[1] = { .name = "pid2", .scnprintf = SCA_PID, },
1003	[2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, },
1004	[3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, },
1005	[4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, },
1006	{ .name = "keyctl",
1007	.arg = { [0] = STRARRAY(option, keyctl_options), }, },
1008	{ .name = "kill",
1009	.arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1010	{ .name = "linkat",
1011	.arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1012	{ .name = "lseek",
1013	.arg = { [2] = STRARRAY(whence, whences), }, },
1014	{ .name = "lstat", .alias = "newlstat", },
1015	{ .name = "madvise",
1016	.arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1017	[2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
1018	{ .name = "mkdirat",
1019	.arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1020	{ .name = "mknodat",
1021	.arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1022	{ .name = "mmap", .hexret = true,
1023	/* The standard mmap maps to old_mmap on s390x */
1024	#if defined(__s390x__)
1025	.alias = "old_mmap",
1026	#endif
1027	.arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
1028	[3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */
1029	.strtoul = STUL_STRARRAY_FLAGS,
1030	.parm = &strarray__mmap_flags, },
1031	[5] = { .scnprintf = SCA_HEX, /* offset */ }, }, },
1032	{ .name = "mount",
1033	.arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ },
1034	[3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
1035	.mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, },
1036	{ .name = "move_mount",
1037	.arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ },
1038	[1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ },
1039	[2] = { .scnprintf = SCA_FDAT, /* to_dfd */ },
1040	[3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ },
1041	[4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, },
1042	{ .name = "mprotect",
1043	.arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1044	[2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, },
1045	{ .name = "mq_unlink",
1046	.arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, },
1047	{ .name = "mremap", .hexret = true,
1048	.arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, },
1049	{ .name = "name_to_handle_at",
1050	.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1051	{ .name = "newfstatat",
1052	.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1053	{ .name = "open",
1054	.arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1055	{ .name = "open_by_handle_at",
1056	.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
1057	[2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1058	{ .name = "openat",
1059	.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ },
1060	[2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1061	{ .name = "perf_event_open",
1062	.arg = { [0] = { .scnprintf = SCA_PERF_ATTR, /* attr */ },
1063	[2] = { .scnprintf = SCA_INT, /* cpu */ },
1064	[3] = { .scnprintf = SCA_FD, /* group_fd */ },
1065	[4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
1066	{ .name = "pipe2",
1067	.arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
1068	{ .name = "pkey_alloc",
1069	.arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, },
1070	{ .name = "pkey_free",
1071	.arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, },
1072	{ .name = "pkey_mprotect",
1073	.arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },
1074	[2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
1075	[3] = { .scnprintf = SCA_INT, /* pkey */ }, }, },
1076	{ .name = "poll", .timeout = true, },
1077	{ .name = "ppoll", .timeout = true, },
1078	{ .name = "prctl",
1079	.arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */
1080	.strtoul = STUL_STRARRAY,
1081	.parm = &strarray__prctl_options, },
1082	[1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
1083	[2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
1084	{ .name = "pread", .alias = "pread64", },
1085	{ .name = "preadv", .alias = "pread", },
1086	{ .name = "prlimit64",
1087	.arg = { [1] = STRARRAY(resource, rlimit_resources), }, },
1088	{ .name = "pwrite", .alias = "pwrite64", },
1089	{ .name = "readlinkat",
1090	.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1091	{ .name = "recvfrom",
1092	.arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1093	{ .name = "recvmmsg",
1094	.arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1095	{ .name = "recvmsg",
1096	.arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1097	{ .name = "renameat",
1098	.arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
1099	[2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, },
1100	{ .name = "renameat2",
1101	.arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
1102	[2] = { .scnprintf = SCA_FDAT, /* newdirfd */ },
1103	[4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, },
1104	{ .name = "rt_sigaction",
1105	.arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1106	{ .name = "rt_sigprocmask",
1107	.arg = { [0] = STRARRAY(how, sighow), }, },
1108	{ .name = "rt_sigqueueinfo",
1109	.arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1110	{ .name = "rt_tgsigqueueinfo",
1111	.arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1112	{ .name = "sched_setscheduler",
1113	.arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
1114	{ .name = "seccomp",
1115	.arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ },
1116	[1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
1117	{ .name = "select", .timeout = true, },
1118	{ .name = "sendfile", .alias = "sendfile64", },
1119	{ .name = "sendmmsg",
1120	.arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1121	{ .name = "sendmsg",
1122	.arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1123	{ .name = "sendto",
1124	.arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ },
1125	[4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, },
1126	{ .name = "set_tid_address", .errpid = true, },
1127	{ .name = "setitimer",
1128	.arg = { [0] = STRARRAY(which, itimers), }, },
1129	{ .name = "setrlimit",
1130	.arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
1131	{ .name = "setsockopt",
1132	.arg = { [1] = STRARRAY(level, socket_level), }, },
1133	{ .name = "socket",
1134	.arg = { [0] = STRARRAY(family, socket_families),
1135	[1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
1136	[2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
1137	{ .name = "socketpair",
1138	.arg = { [0] = STRARRAY(family, socket_families),
1139	[1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
1140	[2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
1141	{ .name = "stat", .alias = "newstat", },
1142	{ .name = "statx",
1143	.arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ },
1144	[2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } ,
1145	[3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, },
1146	{ .name = "swapoff",
1147	.arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
1148	{ .name = "swapon",
1149	.arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, },
1150	{ .name = "symlinkat",
1151	.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1152	{ .name = "sync_file_range",
1153	.arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, },
1154	{ .name = "tgkill",
1155	.arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1156	{ .name = "tkill",
1157	.arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1158	{ .name = "umount2", .alias = "umount",
1159	.arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, },
1160	{ .name = "uname", .alias = "newuname", },
1161	{ .name = "unlinkat",
1162	.arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1163	{ .name = "utimensat",
1164	.arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
1165	{ .name = "wait4", .errpid = true,
1166	.arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
1167	{ .name = "waitid", .errpid = true,
1168	.arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
1169	};
1170
1171	static int syscall_fmt__cmp(const void *name, const void *fmtp)
1172	{
1173	const struct syscall_fmt *fmt = fmtp;
1174	return strcmp(name, fmt->name);
1175	}
1176
1177	static const struct syscall_fmt *__syscall_fmt__find(const struct syscall_fmt *fmts,
1178	const int nmemb,
1179	const char *name)
1180	{
1181	return bsearch(key: name, base: fmts, num: nmemb, size: sizeof(struct syscall_fmt), cmp: syscall_fmt__cmp);
1182	}
1183
1184	static const struct syscall_fmt *syscall_fmt__find(const char *name)
1185	{
1186	const int nmemb = ARRAY_SIZE(syscall_fmts);
1187	return __syscall_fmt__find(fmts: syscall_fmts, nmemb, name);
1188	}
1189
1190	static const struct syscall_fmt *__syscall_fmt__find_by_alias(const struct syscall_fmt *fmts,
1191	const int nmemb, const char *alias)
1192	{
1193	int i;
1194
1195	for (i = 0; i < nmemb; ++i) {
1196	if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0)
1197	return &fmts[i];
1198	}
1199
1200	return NULL;
1201	}
1202
1203	static const struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias)
1204	{
1205	const int nmemb = ARRAY_SIZE(syscall_fmts);
1206	return __syscall_fmt__find_by_alias(fmts: syscall_fmts, nmemb, alias);
1207	}
1208
1209	/*
1210	* is_exit: is this "exit" or "exit_group"?
1211	* is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter.
1212	* args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc.
1213	* nonexistent: Just a hole in the syscall table, syscall id not allocated
1214	*/
1215	struct syscall {
1216	struct tep_event *tp_format;
1217	int nr_args;
1218	int args_size;
1219	struct {
1220	struct bpf_program *sys_enter,
1221	*sys_exit;
1222	} bpf_prog;
1223	bool is_exit;
1224	bool is_open;
1225	bool nonexistent;
1226	struct tep_format_field *args;
1227	const char *name;
1228	const struct syscall_fmt *fmt;
1229	struct syscall_arg_fmt *arg_fmt;
1230	};
1231
1232	/*
1233	* We need to have this 'calculated' boolean because in some cases we really
1234	* don't know what is the duration of a syscall, for instance, when we start
1235	* a session and some threads are waiting for a syscall to finish, say 'poll',
1236	* in which case all we can do is to print "( ? ) for duration and for the
1237	* start timestamp.
1238	*/
1239	static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
1240	{
1241	double duration = (double)t / NSEC_PER_MSEC;
1242	size_t printed = fprintf(fp, "(");
1243
1244	if (!calculated)
1245	printed += fprintf(fp, " ");
1246	else if (duration >= 1.0)
1247	printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
1248	else if (duration >= 0.01)
1249	printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
1250	else
1251	printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
1252	return printed + fprintf(fp, "): ");
1253	}
1254
1255	/**
1256	* filename.ptr: The filename char pointer that will be vfs_getname'd
1257	* filename.entry_str_pos: Where to insert the string translated from
1258	* filename.ptr by the vfs_getname tracepoint/kprobe.
1259	* ret_scnprintf: syscall args may set this to a different syscall return
1260	* formatter, for instance, fcntl may return fds, file flags, etc.
1261	*/
1262	struct thread_trace {
1263	u64 entry_time;
1264	bool entry_pending;
1265	unsigned long nr_events;
1266	unsigned long pfmaj, pfmin;
1267	char *entry_str;
1268	double runtime_ms;
1269	size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
1270	struct {
1271	unsigned long ptr;
1272	short int entry_str_pos;
1273	bool pending_open;
1274	unsigned int namelen;
1275	char *name;
1276	} filename;
1277	struct {
1278	int max;
1279	struct file *table;
1280	} files;
1281
1282	struct intlist *syscall_stats;
1283	};
1284
1285	static struct thread_trace *thread_trace__new(void)
1286	{
1287	struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace));
1288
1289	if (ttrace) {
1290	ttrace->files.max = -1;
1291	ttrace->syscall_stats = intlist__new(NULL);
1292	}
1293
1294	return ttrace;
1295	}
1296
1297	static void thread_trace__free_files(struct thread_trace *ttrace);
1298
1299	static void thread_trace__delete(void *pttrace)
1300	{
1301	struct thread_trace *ttrace = pttrace;
1302
1303	if (!ttrace)
1304	return;
1305
1306	intlist__delete(ilist: ttrace->syscall_stats);
1307	ttrace->syscall_stats = NULL;
1308	thread_trace__free_files(ttrace);
1309	zfree(&ttrace->entry_str);
1310	free(ttrace);
1311	}
1312
1313	static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
1314	{
1315	struct thread_trace *ttrace;
1316
1317	if (thread == NULL)
1318	goto fail;
1319
1320	if (thread__priv(thread) == NULL)
1321	thread__set_priv(thread, p: thread_trace__new());
1322
1323	if (thread__priv(thread) == NULL)
1324	goto fail;
1325
1326	ttrace = thread__priv(thread);
1327	++ttrace->nr_events;
1328
1329	return ttrace;
1330	fail:
1331	color_fprintf(fp, PERF_COLOR_RED,
1332	"WARNING: not enough memory, dropping samples!\n");
1333	return NULL;
1334	}
1335
1336
1337	void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
1338	size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
1339	{
1340	struct thread_trace *ttrace = thread__priv(thread: arg->thread);
1341
1342	ttrace->ret_scnprintf = ret_scnprintf;
1343	}
1344
1345	#define TRACE_PFMAJ (1 << 0)
1346	#define TRACE_PFMIN (1 << 1)
1347
1348	static const size_t trace__entry_str_size = 2048;
1349
1350	static void thread_trace__free_files(struct thread_trace *ttrace)
1351	{
1352	for (int i = 0; i < ttrace->files.max; ++i) {
1353	struct file *file = ttrace->files.table + i;
1354	zfree(&file->pathname);
1355	}
1356
1357	zfree(&ttrace->files.table);
1358	ttrace->files.max = -1;
1359	}
1360
1361	static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd)
1362	{
1363	if (fd < 0)
1364	return NULL;
1365
1366	if (fd > ttrace->files.max) {
1367	struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file));
1368
1369	if (nfiles == NULL)
1370	return NULL;
1371
1372	if (ttrace->files.max != -1) {
1373	memset(nfiles + ttrace->files.max + 1, 0,
1374	(fd - ttrace->files.max) * sizeof(struct file));
1375	} else {
1376	memset(nfiles, 0, (fd + 1) * sizeof(struct file));
1377	}
1378
1379	ttrace->files.table = nfiles;
1380	ttrace->files.max = fd;
1381	}
1382
1383	return ttrace->files.table + fd;
1384	}
1385
1386	struct file *thread__files_entry(struct thread *thread, int fd)
1387	{
1388	return thread_trace__files_entry(ttrace: thread__priv(thread), fd);
1389	}
1390
1391	static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
1392	{
1393	struct thread_trace *ttrace = thread__priv(thread);
1394	struct file *file = thread_trace__files_entry(ttrace, fd);
1395
1396	if (file != NULL) {
1397	struct stat st;
1398	if (stat(pathname, &st) == 0)
1399	file->dev_maj = major(st.st_rdev);
1400	file->pathname = strdup(pathname);
1401	if (file->pathname)
1402	return 0;
1403	}
1404
1405	return -1;
1406	}
1407
1408	static int thread__read_fd_path(struct thread *thread, int fd)
1409	{
1410	char linkname[PATH_MAX], pathname[PATH_MAX];
1411	struct stat st;
1412	int ret;
1413
1414	if (thread__pid(thread) == thread__tid(thread)) {
1415	scnprintf(buf: linkname, size: sizeof(linkname),
1416	fmt: "/proc/%d/fd/%d", thread__pid(thread), fd);
1417	} else {
1418	scnprintf(buf: linkname, size: sizeof(linkname),
1419	fmt: "/proc/%d/task/%d/fd/%d",
1420	thread__pid(thread), thread__tid(thread), fd);
1421	}
1422
1423	if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
1424	return -1;
1425
1426	ret = readlink(linkname, pathname, sizeof(pathname));
1427
1428	if (ret < 0 || ret > st.st_size)
1429	return -1;
1430
1431	pathname[ret] = '\0';
1432	return trace__set_fd_pathname(thread, fd, pathname);
1433	}
1434
1435	static const char *thread__fd_path(struct thread *thread, int fd,
1436	struct trace *trace)
1437	{
1438	struct thread_trace *ttrace = thread__priv(thread);
1439
1440	if (ttrace == NULL || trace->fd_path_disabled)
1441	return NULL;
1442
1443	if (fd < 0)
1444	return NULL;
1445
1446	if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) {
1447	if (!trace->live)
1448	return NULL;
1449	++trace->stats.proc_getname;
1450	if (thread__read_fd_path(thread, fd))
1451	return NULL;
1452	}
1453
1454	return ttrace->files.table[fd].pathname;
1455	}
1456
1457	size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
1458	{
1459	int fd = arg->val;
1460	size_t printed = scnprintf(buf: bf, size, fmt: "%d", fd);
1461	const char *path = thread__fd_path(thread: arg->thread, fd, trace: arg->trace);
1462
1463	if (path)
1464	printed += scnprintf(buf: bf + printed, size: size - printed, fmt: "<%s>", path);
1465
1466	return printed;
1467	}
1468
1469	size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
1470	{
1471	size_t printed = scnprintf(buf: bf, size, fmt: "%d", fd);
1472	struct thread *thread = machine__find_thread(machine: trace->host, pid, tid: pid);
1473
1474	if (thread) {
1475	const char *path = thread__fd_path(thread, fd, trace);
1476
1477	if (path)
1478	printed += scnprintf(buf: bf + printed, size: size - printed, fmt: "<%s>", path);
1479
1480	thread__put(thread);
1481	}
1482
1483	return printed;
1484	}
1485
1486	static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
1487	struct syscall_arg *arg)
1488	{
1489	int fd = arg->val;
1490	size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
1491	struct thread_trace *ttrace = thread__priv(thread: arg->thread);
1492
1493	if (ttrace && fd >= 0 && fd <= ttrace->files.max)
1494	zfree(&ttrace->files.table[fd].pathname);
1495
1496	return printed;
1497	}
1498
1499	static void thread__set_filename_pos(struct thread *thread, const char *bf,
1500	unsigned long ptr)
1501	{
1502	struct thread_trace *ttrace = thread__priv(thread);
1503
1504	ttrace->filename.ptr = ptr;
1505	ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
1506	}
1507
1508	static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size)
1509	{
1510	struct augmented_arg *augmented_arg = arg->augmented.args;
1511	size_t printed = scnprintf(buf: bf, size, fmt: "\"%.*s\"", augmented_arg->size, augmented_arg->value);
1512	/*
1513	* So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls
1514	* we would have two strings, each prefixed by its size.
1515	*/
1516	int consumed = sizeof(*augmented_arg) + augmented_arg->size;
1517
1518	arg->augmented.args = ((void *)arg->augmented.args) + consumed;
1519	arg->augmented.size -= consumed;
1520
1521	return printed;
1522	}
1523
1524	static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
1525	struct syscall_arg *arg)
1526	{
1527	unsigned long ptr = arg->val;
1528
1529	if (arg->augmented.args)
1530	return syscall_arg__scnprintf_augmented_string(arg, bf, size);
1531
1532	if (!arg->trace->vfs_getname)
1533	return scnprintf(buf: bf, size, fmt: "%#x", ptr);
1534
1535	thread__set_filename_pos(thread: arg->thread, bf, ptr);
1536	return 0;
1537	}
1538
1539	static bool trace__filter_duration(struct trace *trace, double t)
1540	{
1541	return t < (trace->duration_filter * NSEC_PER_MSEC);
1542	}
1543
1544	static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1545	{
1546	double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
1547
1548	return fprintf(fp, "%10.3f ", ts);
1549	}
1550
1551	/*
1552	* We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
1553	* using ttrace->entry_time for a thread that receives a sys_exit without
1554	* first having received a sys_enter ("poll" issued before tracing session
1555	* starts, lost sys_enter exit due to ring buffer overflow).
1556	*/
1557	static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1558	{
1559	if (tstamp > 0)
1560	return __trace__fprintf_tstamp(trace, tstamp, fp);
1561
1562	return fprintf(fp, " ? ");
1563	}
1564
1565	static pid_t workload_pid = -1;
1566	static volatile sig_atomic_t done = false;
1567	static volatile sig_atomic_t interrupted = false;
1568
1569	static void sighandler_interrupt(int sig __maybe_unused)
1570	{
1571	done = interrupted = true;
1572	}
1573
1574	static void sighandler_chld(int sig __maybe_unused, siginfo_t *info,
1575	void *context __maybe_unused)
1576	{
1577	if (info->si_pid == workload_pid)
1578	done = true;
1579	}
1580
1581	static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp)
1582	{
1583	size_t printed = 0;
1584
1585	if (trace->multiple_threads) {
1586	if (trace->show_comm)
1587	printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
1588	printed += fprintf(fp, "%d ", thread__tid(thread));
1589	}
1590
1591	return printed;
1592	}
1593
1594	static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
1595	u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
1596	{
1597	size_t printed = 0;
1598
1599	if (trace->show_tstamp)
1600	printed = trace__fprintf_tstamp(trace, tstamp, fp);
1601	if (trace->show_duration)
1602	printed += fprintf_duration(duration, duration_calculated, fp);
1603	return printed + trace__fprintf_comm_tid(trace, thread, fp);
1604	}
1605
1606	static int trace__process_event(struct trace *trace, struct machine *machine,
1607	union perf_event *event, struct perf_sample *sample)
1608	{
1609	int ret = 0;
1610
1611	switch (event->header.type) {
1612	case PERF_RECORD_LOST:
1613	color_fprintf(trace->output, PERF_COLOR_RED,
1614	"LOST %" PRIu64 " events!\n", event->lost.lost);
1615	ret = machine__process_lost_event(machine, event, sample);
1616	break;
1617	default:
1618	ret = machine__process_event(machine, event, sample);
1619	break;
1620	}
1621
1622	return ret;
1623	}
1624
1625	static int trace__tool_process(struct perf_tool *tool,
1626	union perf_event *event,
1627	struct perf_sample *sample,
1628	struct machine *machine)
1629	{
1630	struct trace *trace = container_of(tool, struct trace, tool);
1631	return trace__process_event(trace, machine, event, sample);
1632	}
1633
1634	static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
1635	{
1636	struct machine *machine = vmachine;
1637
1638	if (machine->kptr_restrict_warned)
1639	return NULL;
1640
1641	if (symbol_conf.kptr_restrict) {
1642	pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
1643	"Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n"
1644	"Kernel samples will not be resolved.\n");
1645	machine->kptr_restrict_warned = true;
1646	return NULL;
1647	}
1648
1649	return machine__resolve_kernel_addr(vmachine, addrp, modp);
1650	}
1651
1652	static int trace__symbols_init(struct trace *trace, struct evlist *evlist)
1653	{
1654	int err = symbol__init(NULL);
1655
1656	if (err)
1657	return err;
1658
1659	trace->host = machine__new_host();
1660	if (trace->host == NULL)
1661	return -ENOMEM;
1662
1663	thread__set_priv_destructor(destructor: thread_trace__delete);
1664
1665	err = trace_event__register_resolver(machine: trace->host, func: trace__machine__resolve_kernel_addr);
1666	if (err < 0)
1667	goto out;
1668
1669	err = __machine__synthesize_threads(machine: trace->host, tool: &trace->tool, target: &trace->opts.target,
1670	threads: evlist->core.threads, process: trace__tool_process,
1671	needs_mmap: true, data_mmap: false, nr_threads_synthesize: 1);
1672	out:
1673	if (err)
1674	symbol__exit();
1675
1676	return err;
1677	}
1678
1679	static void trace__symbols__exit(struct trace *trace)
1680	{
1681	machine__exit(machine: trace->host);
1682	trace->host = NULL;
1683
1684	symbol__exit();
1685	}
1686
1687	static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
1688	{
1689	int idx;
1690
1691	if (nr_args == RAW_SYSCALL_ARGS_NUM && sc->fmt && sc->fmt->nr_args != 0)
1692	nr_args = sc->fmt->nr_args;
1693
1694	sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
1695	if (sc->arg_fmt == NULL)
1696	return -1;
1697
1698	for (idx = 0; idx < nr_args; ++idx) {
1699	if (sc->fmt)
1700	sc->arg_fmt[idx] = sc->fmt->arg[idx];
1701	}
1702
1703	sc->nr_args = nr_args;
1704	return 0;
1705	}
1706
1707	static const struct syscall_arg_fmt syscall_arg_fmts__by_name[] = {
1708	{ .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, },
1709	{ .name = "vector", .scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, },
1710	};
1711
1712	static int syscall_arg_fmt__cmp(const void *name, const void *fmtp)
1713	{
1714	const struct syscall_arg_fmt *fmt = fmtp;
1715	return strcmp(name, fmt->name);
1716	}
1717
1718	static const struct syscall_arg_fmt *
1719	__syscall_arg_fmt__find_by_name(const struct syscall_arg_fmt *fmts, const int nmemb,
1720	const char *name)
1721	{
1722	return bsearch(key: name, base: fmts, num: nmemb, size: sizeof(struct syscall_arg_fmt), cmp: syscall_arg_fmt__cmp);
1723	}
1724
1725	static const struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name)
1726	{
1727	const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name);
1728	return __syscall_arg_fmt__find_by_name(fmts: syscall_arg_fmts__by_name, nmemb, name);
1729	}
1730
1731	static struct tep_format_field *
1732	syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field)
1733	{
1734	struct tep_format_field *last_field = NULL;
1735	int len;
1736
1737	for (; field; field = field->next, ++arg) {
1738	last_field = field;
1739
1740	if (arg->scnprintf)
1741	continue;
1742
1743	len = strlen(field->name);
1744
1745	if (strcmp(field->type, "const char *") == 0 &&
1746	((len >= 4 && strcmp(field->name + len - 4, "name") == 0) ||
1747	strstr(field->name, "path") != NULL))
1748	arg->scnprintf = SCA_FILENAME;
1749	else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr"))
1750	arg->scnprintf = SCA_PTR;
1751	else if (strcmp(field->type, "pid_t") == 0)
1752	arg->scnprintf = SCA_PID;
1753	else if (strcmp(field->type, "umode_t") == 0)
1754	arg->scnprintf = SCA_MODE_T;
1755	else if ((field->flags & TEP_FIELD_IS_ARRAY) && strstr(field->type, "char")) {
1756	arg->scnprintf = SCA_CHAR_ARRAY;
1757	arg->nr_entries = field->arraylen;
1758	} else if ((strcmp(field->type, "int") == 0 ||
1759	strcmp(field->type, "unsigned int") == 0 ||
1760	strcmp(field->type, "long") == 0) &&
1761	len >= 2 && strcmp(field->name + len - 2, "fd") == 0) {
1762	/*
1763	* /sys/kernel/tracing/events/syscalls/sys_enter*
1764	* grep -E 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
1765	* 65 int
1766	* 23 unsigned int
1767	* 7 unsigned long
1768	*/
1769	arg->scnprintf = SCA_FD;
1770	} else {
1771	const struct syscall_arg_fmt *fmt =
1772	syscall_arg_fmt__find_by_name(name: field->name);
1773
1774	if (fmt) {
1775	arg->scnprintf = fmt->scnprintf;
1776	arg->strtoul = fmt->strtoul;
1777	}
1778	}
1779	}
1780
1781	return last_field;
1782	}
1783
1784	static int syscall__set_arg_fmts(struct syscall *sc)
1785	{
1786	struct tep_format_field *last_field = syscall_arg_fmt__init_array(arg: sc->arg_fmt, field: sc->args);
1787
1788	if (last_field)
1789	sc->args_size = last_field->offset + last_field->size;
1790
1791	return 0;
1792	}
1793
1794	static int trace__read_syscall_info(struct trace *trace, int id)
1795	{
1796	char tp_name[128];
1797	struct syscall *sc;
1798	const char *name = syscalltbl__name(trace->sctbl, id);
1799
1800	#ifdef HAVE_SYSCALL_TABLE_SUPPORT
1801	if (trace->syscalls.table == NULL) {
1802	trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc));
1803	if (trace->syscalls.table == NULL)
1804	return -ENOMEM;
1805	}
1806	#else
1807	if (id > trace->sctbl->syscalls.max_id || (id == 0 && trace->syscalls.table == NULL)) {
1808	// When using libaudit we don't know beforehand what is the max syscall id
1809	struct syscall *table = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
1810
1811	if (table == NULL)
1812	return -ENOMEM;
1813
1814	// Need to memset from offset 0 and +1 members if brand new
1815	if (trace->syscalls.table == NULL)
1816	memset(table, 0, (id + 1) * sizeof(*sc));
1817	else
1818	memset(table + trace->sctbl->syscalls.max_id + 1, 0, (id - trace->sctbl->syscalls.max_id) * sizeof(*sc));
1819
1820	trace->syscalls.table = table;
1821	trace->sctbl->syscalls.max_id = id;
1822	}
1823	#endif
1824	sc = trace->syscalls.table + id;
1825	if (sc->nonexistent)
1826	return -EEXIST;
1827
1828	if (name == NULL) {
1829	sc->nonexistent = true;
1830	return -EEXIST;
1831	}
1832
1833	sc->name = name;
1834	sc->fmt = syscall_fmt__find(name: sc->name);
1835
1836	snprintf(buf: tp_name, size: sizeof(tp_name), fmt: "sys_enter_%s", sc->name);
1837	sc->tp_format = trace_event__tp_format(sys: "syscalls", name: tp_name);
1838
1839	if (IS_ERR(ptr: sc->tp_format) && sc->fmt && sc->fmt->alias) {
1840	snprintf(buf: tp_name, size: sizeof(tp_name), fmt: "sys_enter_%s", sc->fmt->alias);
1841	sc->tp_format = trace_event__tp_format(sys: "syscalls", name: tp_name);
1842	}
1843
1844	/*
1845	* Fails to read trace point format via sysfs node, so the trace point
1846	* doesn't exist. Set the 'nonexistent' flag as true.
1847	*/
1848	if (IS_ERR(ptr: sc->tp_format)) {
1849	sc->nonexistent = true;
1850	return PTR_ERR(ptr: sc->tp_format);
1851	}
1852
1853	if (syscall__alloc_arg_fmts(sc, nr_args: IS_ERR(ptr: sc->tp_format) ?
1854	RAW_SYSCALL_ARGS_NUM : sc->tp_format->format.nr_fields))
1855	return -ENOMEM;
1856
1857	sc->args = sc->tp_format->format.fields;
1858	/*
1859	* We need to check and discard the first variable '__syscall_nr'
1860	* or 'nr' that mean the syscall number. It is needless here.
1861	* So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
1862	*/
1863	if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
1864	sc->args = sc->args->next;
1865	--sc->nr_args;
1866	}
1867
1868	sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
1869	sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
1870
1871	return syscall__set_arg_fmts(sc);
1872	}
1873
1874	static int evsel__init_tp_arg_scnprintf(struct evsel *evsel)
1875	{
1876	struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
1877
1878	if (fmt != NULL) {
1879	syscall_arg_fmt__init_array(arg: fmt, field: evsel->tp_format->format.fields);
1880	return 0;
1881	}
1882
1883	return -ENOMEM;
1884	}
1885
1886	static int intcmp(const void *a, const void *b)
1887	{
1888	const int *one = a, *another = b;
1889
1890	return *one - *another;
1891	}
1892
1893	static int trace__validate_ev_qualifier(struct trace *trace)
1894	{
1895	int err = 0;
1896	bool printed_invalid_prefix = false;
1897	struct str_node *pos;
1898	size_t nr_used = 0, nr_allocated = strlist__nr_entries(slist: trace->ev_qualifier);
1899
1900	trace->ev_qualifier_ids.entries = malloc(nr_allocated *
1901	sizeof(trace->ev_qualifier_ids.entries[0]));
1902
1903	if (trace->ev_qualifier_ids.entries == NULL) {
1904	fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
1905	trace->output);
1906	err = -EINVAL;
1907	goto out;
1908	}
1909
1910	strlist__for_each_entry(pos, trace->ev_qualifier) {
1911	const char *sc = pos->s;
1912	int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
1913
1914	if (id < 0) {
1915	id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
1916	if (id >= 0)
1917	goto matches;
1918
1919	if (!printed_invalid_prefix) {
1920	pr_debug("Skipping unknown syscalls: ");
1921	printed_invalid_prefix = true;
1922	} else {
1923	pr_debug(", ");
1924	}
1925
1926	pr_debug("%s", sc);
1927	continue;
1928	}
1929	matches:
1930	trace->ev_qualifier_ids.entries[nr_used++] = id;
1931	if (match_next == -1)
1932	continue;
1933
1934	while (1) {
1935	id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
1936	if (id < 0)
1937	break;
1938	if (nr_allocated == nr_used) {
1939	void *entries;
1940
1941	nr_allocated += 8;
1942	entries = realloc(trace->ev_qualifier_ids.entries,
1943	nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
1944	if (entries == NULL) {
1945	err = -ENOMEM;
1946	fputs("\nError:\t Not enough memory for parsing\n", trace->output);
1947	goto out_free;
1948	}
1949	trace->ev_qualifier_ids.entries = entries;
1950	}
1951	trace->ev_qualifier_ids.entries[nr_used++] = id;
1952	}
1953	}
1954
1955	trace->ev_qualifier_ids.nr = nr_used;
1956	qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp);
1957	out:
1958	if (printed_invalid_prefix)
1959	pr_debug("\n");
1960	return err;
1961	out_free:
1962	zfree(&trace->ev_qualifier_ids.entries);
1963	trace->ev_qualifier_ids.nr = 0;
1964	goto out;
1965	}
1966
1967	static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id)
1968	{
1969	bool in_ev_qualifier;
1970
1971	if (trace->ev_qualifier_ids.nr == 0)
1972	return true;
1973
1974	in_ev_qualifier = bsearch(key: &id, base: trace->ev_qualifier_ids.entries,
1975	num: trace->ev_qualifier_ids.nr, size: sizeof(int), cmp: intcmp) != NULL;
1976
1977	if (in_ev_qualifier)
1978	return !trace->not_ev_qualifier;
1979
1980	return trace->not_ev_qualifier;
1981	}
1982
1983	/*
1984	* args is to be interpreted as a series of longs but we need to handle
1985	* 8-byte unaligned accesses. args points to raw_data within the event
1986	* and raw_data is guaranteed to be 8-byte unaligned because it is
1987	* preceded by raw_size which is a u32. So we need to copy args to a temp
1988	* variable to read it. Most notably this avoids extended load instructions
1989	* on unaligned addresses
1990	*/
1991	unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
1992	{
1993	unsigned long val;
1994	unsigned char *p = arg->args + sizeof(unsigned long) * idx;
1995
1996	memcpy(&val, p, sizeof(val));
1997	return val;
1998	}
1999
2000	static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
2001	struct syscall_arg *arg)
2002	{
2003	if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
2004	return scnprintf(buf: bf, size, fmt: "%s: ", sc->arg_fmt[arg->idx].name);
2005
2006	return scnprintf(buf: bf, size, fmt: "arg%d: ", arg->idx);
2007	}
2008
2009	/*
2010	* Check if the value is in fact zero, i.e. mask whatever needs masking, such
2011	* as mount 'flags' argument that needs ignoring some magic flag, see comment
2012	* in tools/perf/trace/beauty/mount_flags.c
2013	*/
2014	static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val)
2015	{
2016	if (fmt && fmt->mask_val)
2017	return fmt->mask_val(arg, val);
2018
2019	return val;
2020	}
2021
2022	static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size,
2023	struct syscall_arg *arg, unsigned long val)
2024	{
2025	if (fmt && fmt->scnprintf) {
2026	arg->val = val;
2027	if (fmt->parm)
2028	arg->parm = fmt->parm;
2029	return fmt->scnprintf(bf, size, arg);
2030	}
2031	return scnprintf(buf: bf, size, fmt: "%ld", val);
2032	}
2033
2034	static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
2035	unsigned char *args, void *augmented_args, int augmented_args_size,
2036	struct trace *trace, struct thread *thread)
2037	{
2038	size_t printed = 0;
2039	unsigned long val;
2040	u8 bit = 1;
2041	struct syscall_arg arg = {
2042	.args = args,
2043	.augmented = {
2044	.size = augmented_args_size,
2045	.args = augmented_args,
2046	},
2047	.idx = 0,
2048	.mask = 0,
2049	.trace = trace,
2050	.thread = thread,
2051	.show_string_prefix = trace->show_string_prefix,
2052	};
2053	struct thread_trace *ttrace = thread__priv(thread);
2054
2055	/*
2056	* Things like fcntl will set this in its 'cmd' formatter to pick the
2057	* right formatter for the return value (an fd? file flags?), which is
2058	* not needed for syscalls that always return a given type, say an fd.
2059	*/
2060	ttrace->ret_scnprintf = NULL;
2061
2062	if (sc->args != NULL) {
2063	struct tep_format_field *field;
2064
2065	for (field = sc->args; field;
2066	field = field->next, ++arg.idx, bit <<= 1) {
2067	if (arg.mask & bit)
2068	continue;
2069
2070	arg.fmt = &sc->arg_fmt[arg.idx];
2071	val = syscall_arg__val(arg: &arg, idx: arg.idx);
2072	/*
2073	* Some syscall args need some mask, most don't and
2074	* return val untouched.
2075	*/
2076	val = syscall_arg_fmt__mask_val(fmt: &sc->arg_fmt[arg.idx], arg: &arg, val);
2077
2078	/*
2079	* Suppress this argument if its value is zero and
2080	* and we don't have a string associated in an
2081	* strarray for it.
2082	*/
2083	if (val == 0 &&
2084	!trace->show_zeros &&
2085	!(sc->arg_fmt &&
2086	(sc->arg_fmt[arg.idx].show_zero ||
2087	sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
2088	sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
2089	sc->arg_fmt[arg.idx].parm))
2090	continue;
2091
2092	printed += scnprintf(buf: bf + printed, size: size - printed, fmt: "%s", printed ? ", " : "");
2093
2094	if (trace->show_arg_names)
2095	printed += scnprintf(buf: bf + printed, size: size - printed, fmt: "%s: ", field->name);
2096
2097	printed += syscall_arg_fmt__scnprintf_val(fmt: &sc->arg_fmt[arg.idx],
2098	bf: bf + printed, size: size - printed, arg: &arg, val);
2099	}
2100	} else if (IS_ERR(ptr: sc->tp_format)) {
2101	/*
2102	* If we managed to read the tracepoint /format file, then we
2103	* may end up not having any args, like with gettid(), so only
2104	* print the raw args when we didn't manage to read it.
2105	*/
2106	while (arg.idx < sc->nr_args) {
2107	if (arg.mask & bit)
2108	goto next_arg;
2109	val = syscall_arg__val(arg: &arg, idx: arg.idx);
2110	if (printed)
2111	printed += scnprintf(buf: bf + printed, size: size - printed, fmt: ", ");
2112	printed += syscall__scnprintf_name(sc, bf: bf + printed, size: size - printed, arg: &arg);
2113	printed += syscall_arg_fmt__scnprintf_val(fmt: &sc->arg_fmt[arg.idx], bf: bf + printed, size: size - printed, arg: &arg, val);
2114	next_arg:
2115	++arg.idx;
2116	bit <<= 1;
2117	}
2118	}
2119
2120	return printed;
2121	}
2122
2123	typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel,
2124	union perf_event *event,
2125	struct perf_sample *sample);
2126
2127	static struct syscall *trace__syscall_info(struct trace *trace,
2128	struct evsel *evsel, int id)
2129	{
2130	int err = 0;
2131
2132	if (id < 0) {
2133
2134	/*
2135	* XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
2136	* before that, leaving at a higher verbosity level till that is
2137	* explained. Reproduced with plain ftrace with:
2138	*
2139	* echo 1 > /t/events/raw_syscalls/sys_exit/enable
2140	* grep "NR -1 " /t/trace_pipe
2141	*
2142	* After generating some load on the machine.
2143	*/
2144	if (verbose > 1) {
2145	static u64 n;
2146	fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
2147	id, evsel__name(evsel), ++n);
2148	}
2149	return NULL;
2150	}
2151
2152	err = -EINVAL;
2153
2154	#ifdef HAVE_SYSCALL_TABLE_SUPPORT
2155	if (id > trace->sctbl->syscalls.max_id) {
2156	#else
2157	if (id >= trace->sctbl->syscalls.max_id) {
2158	/*
2159	* With libaudit we don't know beforehand what is the max_id,
2160	* so we let trace__read_syscall_info() figure that out as we
2161	* go on reading syscalls.
2162	*/
2163	err = trace__read_syscall_info(trace, id);
2164	if (err)
2165	#endif
2166	goto out_cant_read;
2167	}
2168
2169	if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) &&
2170	(err = trace__read_syscall_info(trace, id)) != 0)
2171	goto out_cant_read;
2172
2173	if (trace->syscalls.table && trace->syscalls.table[id].nonexistent)
2174	goto out_cant_read;
2175
2176	return &trace->syscalls.table[id];
2177
2178	out_cant_read:
2179	if (verbose > 0) {
2180	char sbuf[STRERR_BUFSIZE];
2181	fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf)));
2182	if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL)
2183	fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
2184	fputs(" information\n", trace->output);
2185	}
2186	return NULL;
2187	}
2188
2189	struct syscall_stats {
2190	struct stats stats;
2191	u64 nr_failures;
2192	int max_errno;
2193	u32 *errnos;
2194	};
2195
2196	static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace,
2197	int id, struct perf_sample *sample, long err, bool errno_summary)
2198	{
2199	struct int_node *inode;
2200	struct syscall_stats *stats;
2201	u64 duration = 0;
2202
2203	inode = intlist__findnew(ilist: ttrace->syscall_stats, i: id);
2204	if (inode == NULL)
2205	return;
2206
2207	stats = inode->priv;
2208	if (stats == NULL) {
2209	stats = zalloc(sizeof(*stats));
2210	if (stats == NULL)
2211	return;
2212
2213	init_stats(stats: &stats->stats);
2214	inode->priv = stats;
2215	}
2216
2217	if (ttrace->entry_time && sample->time > ttrace->entry_time)
2218	duration = sample->time - ttrace->entry_time;
2219
2220	update_stats(stats: &stats->stats, val: duration);
2221
2222	if (err < 0) {
2223	++stats->nr_failures;
2224
2225	if (!errno_summary)
2226	return;
2227
2228	err = -err;
2229	if (err > stats->max_errno) {
2230	u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32));
2231
2232	if (new_errnos) {
2233	memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32));
2234	} else {
2235	pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n",
2236	thread__comm_str(thread), thread__pid(thread),
2237	thread__tid(thread));
2238	return;
2239	}
2240
2241	stats->errnos = new_errnos;
2242	stats->max_errno = err;
2243	}
2244
2245	++stats->errnos[err - 1];
2246	}
2247	}
2248
2249	static int trace__printf_interrupted_entry(struct trace *trace)
2250	{
2251	struct thread_trace *ttrace;
2252	size_t printed;
2253	int len;
2254
2255	if (trace->failure_only || trace->current == NULL)
2256	return 0;
2257
2258	ttrace = thread__priv(thread: trace->current);
2259
2260	if (!ttrace->entry_pending)
2261	return 0;
2262
2263	printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
2264	printed += len = fprintf(trace->output, "%s)", ttrace->entry_str);
2265
2266	if (len < trace->args_alignment - 4)
2267	printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " ");
2268
2269	printed += fprintf(trace->output, " ...\n");
2270
2271	ttrace->entry_pending = false;
2272	++trace->nr_events_printed;
2273
2274	return printed;
2275	}
2276
2277	static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel,
2278	struct perf_sample *sample, struct thread *thread)
2279	{
2280	int printed = 0;
2281
2282	if (trace->print_sample) {
2283	double ts = (double)sample->time / NSEC_PER_MSEC;
2284
2285	printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
2286	evsel__name(evsel), ts,
2287	thread__comm_str(thread),
2288	sample->pid, sample->tid, sample->cpu);
2289	}
2290
2291	return printed;
2292	}
2293
2294	static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size)
2295	{
2296	void *augmented_args = NULL;
2297	/*
2298	* For now with BPF raw_augmented we hook into raw_syscalls:sys_enter
2299	* and there we get all 6 syscall args plus the tracepoint common fields
2300	* that gets calculated at the start and the syscall_nr (another long).
2301	* So we check if that is the case and if so don't look after the
2302	* sc->args_size but always after the full raw_syscalls:sys_enter payload,
2303	* which is fixed.
2304	*
2305	* We'll revisit this later to pass s->args_size to the BPF augmenter
2306	* (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it
2307	* copies only what we need for each syscall, like what happens when we
2308	* use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace
2309	* traffic to just what is needed for each syscall.
2310	*/
2311	int args_size = raw_augmented_args_size ?: sc->args_size;
2312
2313	*augmented_args_size = sample->raw_size - args_size;
2314	if (*augmented_args_size > 0)
2315	augmented_args = sample->raw_data + args_size;
2316
2317	return augmented_args;
2318	}
2319
2320	static void syscall__exit(struct syscall *sc)
2321	{
2322	if (!sc)
2323	return;
2324
2325	zfree(&sc->arg_fmt);
2326	}
2327
2328	static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
2329	union perf_event *event __maybe_unused,
2330	struct perf_sample *sample)
2331	{
2332	char *msg;
2333	void *args;
2334	int printed = 0;
2335	struct thread *thread;
2336	int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2337	int augmented_args_size = 0;
2338	void *augmented_args = NULL;
2339	struct syscall *sc = trace__syscall_info(trace, evsel, id);
2340	struct thread_trace *ttrace;
2341
2342	if (sc == NULL)
2343	return -1;
2344
2345	thread = machine__findnew_thread(machine: trace->host, pid: sample->pid, tid: sample->tid);
2346	ttrace = thread__trace(thread, trace->output);
2347	if (ttrace == NULL)
2348	goto out_put;
2349
2350	trace__fprintf_sample(trace, evsel, sample, thread);
2351
2352	args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2353
2354	if (ttrace->entry_str == NULL) {
2355	ttrace->entry_str = malloc(trace__entry_str_size);
2356	if (!ttrace->entry_str)
2357	goto out_put;
2358	}
2359
2360	if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
2361	trace__printf_interrupted_entry(trace);
2362	/*
2363	* If this is raw_syscalls.sys_enter, then it always comes with the 6 possible
2364	* arguments, even if the syscall being handled, say "openat", uses only 4 arguments
2365	* this breaks syscall__augmented_args() check for augmented args, as we calculate
2366	* syscall->args_size using each syscalls:sys_enter_NAME tracefs format file,
2367	* so when handling, say the openat syscall, we end up getting 6 args for the
2368	* raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly
2369	* thinking that the extra 2 u64 args are the augmented filename, so just check
2370	* here and avoid using augmented syscalls when the evsel is the raw_syscalls one.
2371	*/
2372	if (evsel != trace->syscalls.events.sys_enter)
2373	augmented_args = syscall__augmented_args(sc, sample, augmented_args_size: &augmented_args_size, raw_augmented_args_size: trace->raw_augmented_syscalls_args_size);
2374	ttrace->entry_time = sample->time;
2375	msg = ttrace->entry_str;
2376	printed += scnprintf(buf: msg + printed, size: trace__entry_str_size - printed, fmt: "%s(", sc->name);
2377
2378	printed += syscall__scnprintf_args(sc, bf: msg + printed, size: trace__entry_str_size - printed,
2379	args, augmented_args, augmented_args_size, trace, thread);
2380
2381	if (sc->is_exit) {
2382	if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
2383	int alignment = 0;
2384
2385	trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
2386	printed = fprintf(trace->output, "%s)", ttrace->entry_str);
2387	if (trace->args_alignment > printed)
2388	alignment = trace->args_alignment - printed;
2389	fprintf(trace->output, "%*s= ?\n", alignment, " ");
2390	}
2391	} else {
2392	ttrace->entry_pending = true;
2393	/* See trace__vfs_getname & trace__sys_exit */
2394	ttrace->filename.pending_open = false;
2395	}
2396
2397	if (trace->current != thread) {
2398	thread__put(thread: trace->current);
2399	trace->current = thread__get(thread);
2400	}
2401	err = 0;
2402	out_put:
2403	thread__put(thread);
2404	return err;
2405	}
2406
2407	static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
2408	struct perf_sample *sample)
2409	{
2410	struct thread_trace *ttrace;
2411	struct thread *thread;
2412	int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2413	struct syscall *sc = trace__syscall_info(trace, evsel, id);
2414	char msg[1024];
2415	void *args, *augmented_args = NULL;
2416	int augmented_args_size;
2417
2418	if (sc == NULL)
2419	return -1;
2420
2421	thread = machine__findnew_thread(machine: trace->host, pid: sample->pid, tid: sample->tid);
2422	ttrace = thread__trace(thread, trace->output);
2423	/*
2424	* We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
2425	* and the rest of the beautifiers accessing it via struct syscall_arg touches it.
2426	*/
2427	if (ttrace == NULL)
2428	goto out_put;
2429
2430	args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2431	augmented_args = syscall__augmented_args(sc, sample, augmented_args_size: &augmented_args_size, raw_augmented_args_size: trace->raw_augmented_syscalls_args_size);
2432	syscall__scnprintf_args(sc, bf: msg, size: sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
2433	fprintf(trace->output, "%s", msg);
2434	err = 0;
2435	out_put:
2436	thread__put(thread);
2437	return err;
2438	}
2439
2440	static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel,
2441	struct perf_sample *sample,
2442	struct callchain_cursor *cursor)
2443	{
2444	struct addr_location al;
2445	int max_stack = evsel->core.attr.sample_max_stack ?
2446	evsel->core.attr.sample_max_stack :
2447	trace->max_stack;
2448	int err = -1;
2449
2450	addr_location__init(al: &al);
2451	if (machine__resolve(machine: trace->host, al: &al, sample) < 0)
2452	goto out;
2453
2454	err = thread__resolve_callchain(thread: al.thread, cursor, evsel, sample, NULL, NULL, max_stack);
2455	out:
2456	addr_location__exit(al: &al);
2457	return err;
2458	}
2459
2460	static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
2461	{
2462	/* TODO: user-configurable print_opts */
2463	const unsigned int print_opts = EVSEL__PRINT_SYM |
2464	EVSEL__PRINT_DSO |
2465	EVSEL__PRINT_UNKNOWN_AS_ADDR;
2466
2467	return sample__fprintf_callchain(sample, 38, print_opts, get_tls_callchain_cursor(), symbol_conf.bt_stop_list, trace->output);
2468	}
2469
2470	static const char *errno_to_name(struct evsel *evsel, int err)
2471	{
2472	struct perf_env *env = evsel__env(evsel);
2473	const char *arch_name = perf_env__arch(env);
2474
2475	return arch_syscalls__strerrno(arch: arch_name, err);
2476	}
2477
2478	static int trace__sys_exit(struct trace *trace, struct evsel *evsel,
2479	union perf_event *event __maybe_unused,
2480	struct perf_sample *sample)
2481	{
2482	long ret;
2483	u64 duration = 0;
2484	bool duration_calculated = false;
2485	struct thread *thread;
2486	int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
2487	int alignment = trace->args_alignment;
2488	struct syscall *sc = trace__syscall_info(trace, evsel, id);
2489	struct thread_trace *ttrace;
2490
2491	if (sc == NULL)
2492	return -1;
2493
2494	thread = machine__findnew_thread(machine: trace->host, pid: sample->pid, tid: sample->tid);
2495	ttrace = thread__trace(thread, trace->output);
2496	if (ttrace == NULL)
2497	goto out_put;
2498
2499	trace__fprintf_sample(trace, evsel, sample, thread);
2500
2501	ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
2502
2503	if (trace->summary)
2504	thread__update_stats(thread, ttrace, id, sample, err: ret, errno_summary: trace->errno_summary);
2505
2506	if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
2507	trace__set_fd_pathname(thread, fd: ret, pathname: ttrace->filename.name);
2508	ttrace->filename.pending_open = false;
2509	++trace->stats.vfs_getname;
2510	}
2511
2512	if (ttrace->entry_time) {
2513	duration = sample->time - ttrace->entry_time;
2514	if (trace__filter_duration(trace, t: duration))
2515	goto out;
2516	duration_calculated = true;
2517	} else if (trace->duration_filter)
2518	goto out;
2519
2520	if (sample->callchain) {
2521	struct callchain_cursor *cursor = get_tls_callchain_cursor();
2522
2523	callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor);
2524	if (callchain_ret == 0) {
2525	if (cursor->nr < trace->min_stack)
2526	goto out;
2527	callchain_ret = 1;
2528	}
2529	}
2530
2531	if (trace->summary_only || (ret >= 0 && trace->failure_only))
2532	goto out;
2533
2534	trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
2535
2536	if (ttrace->entry_pending) {
2537	printed = fprintf(trace->output, "%s", ttrace->entry_str);
2538	} else {
2539	printed += fprintf(trace->output, " ... [");
2540	color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
2541	printed += 9;
2542	printed += fprintf(trace->output, "]: %s()", sc->name);
2543	}
2544
2545	printed++; /* the closing ')' */
2546
2547	if (alignment > printed)
2548	alignment -= printed;
2549	else
2550	alignment = 0;
2551
2552	fprintf(trace->output, ")%*s= ", alignment, " ");
2553
2554	if (sc->fmt == NULL) {
2555	if (ret < 0)
2556	goto errno_print;
2557	signed_print:
2558	fprintf(trace->output, "%ld", ret);
2559	} else if (ret < 0) {
2560	errno_print: {
2561	char bf[STRERR_BUFSIZE];
2562	const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
2563	*e = errno_to_name(evsel, err: -ret);
2564
2565	fprintf(trace->output, "-1 %s (%s)", e, emsg);
2566	}
2567	} else if (ret == 0 && sc->fmt->timeout)
2568	fprintf(trace->output, "0 (Timeout)");
2569	else if (ttrace->ret_scnprintf) {
2570	char bf[1024];
2571	struct syscall_arg arg = {
2572	.val = ret,
2573	.thread = thread,
2574	.trace = trace,
2575	};
2576	ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
2577	ttrace->ret_scnprintf = NULL;
2578	fprintf(trace->output, "%s", bf);
2579	} else if (sc->fmt->hexret)
2580	fprintf(trace->output, "%#lx", ret);
2581	else if (sc->fmt->errpid) {
2582	struct thread *child = machine__find_thread(machine: trace->host, pid: ret, tid: ret);
2583
2584	if (child != NULL) {
2585	fprintf(trace->output, "%ld", ret);
2586	if (thread__comm_set(thread: child))
2587	fprintf(trace->output, " (%s)", thread__comm_str(thread: child));
2588	thread__put(thread: child);
2589	}
2590	} else
2591	goto signed_print;
2592
2593	fputc('\n', trace->output);
2594
2595	/*
2596	* We only consider an 'event' for the sake of --max-events a non-filtered
2597	* sys_enter + sys_exit and other tracepoint events.
2598	*/
2599	if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX)
2600	interrupted = true;
2601
2602	if (callchain_ret > 0)
2603	trace__fprintf_callchain(trace, sample);
2604	else if (callchain_ret < 0)
2605	pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2606	out:
2607	ttrace->entry_pending = false;
2608	err = 0;
2609	out_put:
2610	thread__put(thread);
2611	return err;
2612	}
2613
2614	static int trace__vfs_getname(struct trace *trace, struct evsel *evsel,
2615	union perf_event *event __maybe_unused,
2616	struct perf_sample *sample)
2617	{
2618	struct thread *thread = machine__findnew_thread(machine: trace->host, pid: sample->pid, tid: sample->tid);
2619	struct thread_trace *ttrace;
2620	size_t filename_len, entry_str_len, to_move;
2621	ssize_t remaining_space;
2622	char *pos;
2623	const char *filename = evsel__rawptr(evsel, sample, "pathname");
2624
2625	if (!thread)
2626	goto out;
2627
2628	ttrace = thread__priv(thread);
2629	if (!ttrace)
2630	goto out_put;
2631
2632	filename_len = strlen(filename);
2633	if (filename_len == 0)
2634	goto out_put;
2635
2636	if (ttrace->filename.namelen < filename_len) {
2637	char *f = realloc(ttrace->filename.name, filename_len + 1);
2638
2639	if (f == NULL)
2640	goto out_put;
2641
2642	ttrace->filename.namelen = filename_len;
2643	ttrace->filename.name = f;
2644	}
2645
2646	strcpy(p: ttrace->filename.name, q: filename);
2647	ttrace->filename.pending_open = true;
2648
2649	if (!ttrace->filename.ptr)
2650	goto out_put;
2651
2652	entry_str_len = strlen(ttrace->entry_str);
2653	remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
2654	if (remaining_space <= 0)
2655	goto out_put;
2656
2657	if (filename_len > (size_t)remaining_space) {
2658	filename += filename_len - remaining_space;
2659	filename_len = remaining_space;
2660	}
2661
2662	to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
2663	pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
2664	memmove(pos + filename_len, pos, to_move);
2665	memcpy(pos, filename, filename_len);
2666
2667	ttrace->filename.ptr = 0;
2668	ttrace->filename.entry_str_pos = 0;
2669	out_put:
2670	thread__put(thread);
2671	out:
2672	return 0;
2673	}
2674
2675	static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel,
2676	union perf_event *event __maybe_unused,
2677	struct perf_sample *sample)
2678	{
2679	u64 runtime = evsel__intval(evsel, sample, "runtime");
2680	double runtime_ms = (double)runtime / NSEC_PER_MSEC;
2681	struct thread *thread = machine__findnew_thread(machine: trace->host,
2682	pid: sample->pid,
2683	tid: sample->tid);
2684	struct thread_trace *ttrace = thread__trace(thread, trace->output);
2685
2686	if (ttrace == NULL)
2687	goto out_dump;
2688
2689	ttrace->runtime_ms += runtime_ms;
2690	trace->runtime_ms += runtime_ms;
2691	out_put:
2692	thread__put(thread);
2693	return 0;
2694
2695	out_dump:
2696	fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
2697	evsel->name,
2698	evsel__strval(evsel, sample, "comm"),
2699	(pid_t)evsel__intval(evsel, sample, "pid"),
2700	runtime,
2701	evsel__intval(evsel, sample, "vruntime"));
2702	goto out_put;
2703	}
2704
2705	static int bpf_output__printer(enum binary_printer_ops op,
2706	unsigned int val, void *extra __maybe_unused, FILE *fp)
2707	{
2708	unsigned char ch = (unsigned char)val;
2709
2710	switch (op) {
2711	case BINARY_PRINT_CHAR_DATA:
2712	return fprintf(fp, "%c", isprint(ch) ? ch : '.');
2713	case BINARY_PRINT_DATA_BEGIN:
2714	case BINARY_PRINT_LINE_BEGIN:
2715	case BINARY_PRINT_ADDR:
2716	case BINARY_PRINT_NUM_DATA:
2717	case BINARY_PRINT_NUM_PAD:
2718	case BINARY_PRINT_SEP:
2719	case BINARY_PRINT_CHAR_PAD:
2720	case BINARY_PRINT_LINE_END:
2721	case BINARY_PRINT_DATA_END:
2722	default:
2723	break;
2724	}
2725
2726	return 0;
2727	}
2728
2729	static void bpf_output__fprintf(struct trace *trace,
2730	struct perf_sample *sample)
2731	{
2732	binary__fprintf(sample->raw_data, sample->raw_size, 8,
2733	bpf_output__printer, NULL, trace->output);
2734	++trace->nr_events_printed;
2735	}
2736
2737	static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample,
2738	struct thread *thread, void *augmented_args, int augmented_args_size)
2739	{
2740	char bf[2048];
2741	size_t size = sizeof(bf);
2742	struct tep_format_field *field = evsel->tp_format->format.fields;
2743	struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel);
2744	size_t printed = 0;
2745	unsigned long val;
2746	u8 bit = 1;
2747	struct syscall_arg syscall_arg = {
2748	.augmented = {
2749	.size = augmented_args_size,
2750	.args = augmented_args,
2751	},
2752	.idx = 0,
2753	.mask = 0,
2754	.trace = trace,
2755	.thread = thread,
2756	.show_string_prefix = trace->show_string_prefix,
2757	};
2758
2759	for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) {
2760	if (syscall_arg.mask & bit)
2761	continue;
2762
2763	syscall_arg.len = 0;
2764	syscall_arg.fmt = arg;
2765	if (field->flags & TEP_FIELD_IS_ARRAY) {
2766	int offset = field->offset;
2767
2768	if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2769	offset = format_field__intval(field, sample, needs_swap: evsel->needs_swap);
2770	syscall_arg.len = offset >> 16;
2771	offset &= 0xffff;
2772	if (tep_field_is_relative(flags: field->flags))
2773	offset += field->offset + field->size;
2774	}
2775
2776	val = (uintptr_t)(sample->raw_data + offset);
2777	} else
2778	val = format_field__intval(field, sample, needs_swap: evsel->needs_swap);
2779	/*
2780	* Some syscall args need some mask, most don't and
2781	* return val untouched.
2782	*/
2783	val = syscall_arg_fmt__mask_val(fmt: arg, arg: &syscall_arg, val);
2784
2785	/*
2786	* Suppress this argument if its value is zero and
2787	* we don't have a string associated in an
2788	* strarray for it.
2789	*/
2790	if (val == 0 &&
2791	!trace->show_zeros &&
2792	!((arg->show_zero ||
2793	arg->scnprintf == SCA_STRARRAY ||
2794	arg->scnprintf == SCA_STRARRAYS) &&
2795	arg->parm))
2796	continue;
2797
2798	printed += scnprintf(buf: bf + printed, size: size - printed, fmt: "%s", printed ? ", " : "");
2799
2800	if (trace->show_arg_names)
2801	printed += scnprintf(buf: bf + printed, size: size - printed, fmt: "%s: ", field->name);
2802
2803	printed += syscall_arg_fmt__scnprintf_val(fmt: arg, bf: bf + printed, size: size - printed, arg: &syscall_arg, val);
2804	}
2805
2806	return printed + fprintf(trace->output, "%s", bf);
2807	}
2808
2809	static int trace__event_handler(struct trace *trace, struct evsel *evsel,
2810	union perf_event *event __maybe_unused,
2811	struct perf_sample *sample)
2812	{
2813	struct thread *thread;
2814	int callchain_ret = 0;
2815	/*
2816	* Check if we called perf_evsel__disable(evsel) due to, for instance,
2817	* this event's max_events having been hit and this is an entry coming
2818	* from the ring buffer that we should discard, since the max events
2819	* have already been considered/printed.
2820	*/
2821	if (evsel->disabled)
2822	return 0;
2823
2824	thread = machine__findnew_thread(machine: trace->host, pid: sample->pid, tid: sample->tid);
2825
2826	if (sample->callchain) {
2827	struct callchain_cursor *cursor = get_tls_callchain_cursor();
2828
2829	callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor);
2830	if (callchain_ret == 0) {
2831	if (cursor->nr < trace->min_stack)
2832	goto out;
2833	callchain_ret = 1;
2834	}
2835	}
2836
2837	trace__printf_interrupted_entry(trace);
2838	trace__fprintf_tstamp(trace, sample->time, trace->output);
2839
2840	if (trace->trace_syscalls && trace->show_duration)
2841	fprintf(trace->output, "( ): ");
2842
2843	if (thread)
2844	trace__fprintf_comm_tid(trace, thread, trace->output);
2845
2846	if (evsel == trace->syscalls.events.bpf_output) {
2847	int id = perf_evsel__sc_tp_uint(evsel, id, sample);
2848	struct syscall *sc = trace__syscall_info(trace, evsel, id);
2849
2850	if (sc) {
2851	fprintf(trace->output, "%s(", sc->name);
2852	trace__fprintf_sys_enter(trace, evsel, sample);
2853	fputc(')', trace->output);
2854	goto newline;
2855	}
2856
2857	/*
2858	* XXX: Not having the associated syscall info or not finding/adding
2859	* the thread should never happen, but if it does...
2860	* fall thru and print it as a bpf_output event.
2861	*/
2862	}
2863
2864	fprintf(trace->output, "%s(", evsel->name);
2865
2866	if (evsel__is_bpf_output(evsel)) {
2867	bpf_output__fprintf(trace, sample);
2868	} else if (evsel->tp_format) {
2869	if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
2870	trace__fprintf_sys_enter(trace, evsel, sample)) {
2871	if (trace->libtraceevent_print) {
2872	event_format__fprintf(evsel->tp_format, sample->cpu,
2873	sample->raw_data, sample->raw_size,
2874	trace->output);
2875	} else {
2876	trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, augmented_args_size: 0);
2877	}
2878	}
2879	}
2880
2881	newline:
2882	fprintf(trace->output, ")\n");
2883
2884	if (callchain_ret > 0)
2885	trace__fprintf_callchain(trace, sample);
2886	else if (callchain_ret < 0)
2887	pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2888
2889	++trace->nr_events_printed;
2890
2891	if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
2892	evsel__disable(evsel);
2893	evsel__close(evsel);
2894	}
2895	out:
2896	thread__put(thread);
2897	return 0;
2898	}
2899
2900	static void print_location(FILE *f, struct perf_sample *sample,
2901	struct addr_location *al,
2902	bool print_dso, bool print_sym)
2903	{
2904
2905	if ((verbose > 0 || print_dso) && al->map)
2906	fprintf(f, "%s@", map__dso(map: al->map)->long_name);
2907
2908	if ((verbose > 0 || print_sym) && al->sym)
2909	fprintf(f, "%s+0x%" PRIx64, al->sym->name,
2910	al->addr - al->sym->start);
2911	else if (al->map)
2912	fprintf(f, "0x%" PRIx64, al->addr);
2913	else
2914	fprintf(f, "0x%" PRIx64, sample->addr);
2915	}
2916
2917	static int trace__pgfault(struct trace *trace,
2918	struct evsel *evsel,
2919	union perf_event *event __maybe_unused,
2920	struct perf_sample *sample)
2921	{
2922	struct thread *thread;
2923	struct addr_location al;
2924	char map_type = 'd';
2925	struct thread_trace *ttrace;
2926	int err = -1;
2927	int callchain_ret = 0;
2928
2929	addr_location__init(al: &al);
2930	thread = machine__findnew_thread(machine: trace->host, pid: sample->pid, tid: sample->tid);
2931
2932	if (sample->callchain) {
2933	struct callchain_cursor *cursor = get_tls_callchain_cursor();
2934
2935	callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor);
2936	if (callchain_ret == 0) {
2937	if (cursor->nr < trace->min_stack)
2938	goto out_put;
2939	callchain_ret = 1;
2940	}
2941	}
2942
2943	ttrace = thread__trace(thread, trace->output);
2944	if (ttrace == NULL)
2945	goto out_put;
2946
2947	if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
2948	ttrace->pfmaj++;
2949	else
2950	ttrace->pfmin++;
2951
2952	if (trace->summary_only)
2953	goto out;
2954
2955	thread__find_symbol(thread, cpumode: sample->cpumode, addr: sample->ip, al: &al);
2956
2957	trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
2958
2959	fprintf(trace->output, "%sfault [",
2960	evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
2961	"maj" : "min");
2962
2963	print_location(trace->output, sample, &al, false, true);
2964
2965	fprintf(trace->output, "] => ");
2966
2967	thread__find_symbol(thread, cpumode: sample->cpumode, addr: sample->addr, al: &al);
2968
2969	if (!al.map) {
2970	thread__find_symbol(thread, cpumode: sample->cpumode, addr: sample->addr, al: &al);
2971
2972	if (al.map)
2973	map_type = 'x';
2974	else
2975	map_type = '?';
2976	}
2977
2978	print_location(trace->output, sample, &al, true, false);
2979
2980	fprintf(trace->output, " (%c%c)\n", map_type, al.level);
2981
2982	if (callchain_ret > 0)
2983	trace__fprintf_callchain(trace, sample);
2984	else if (callchain_ret < 0)
2985	pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2986
2987	++trace->nr_events_printed;
2988	out:
2989	err = 0;
2990	out_put:
2991	thread__put(thread);
2992	addr_location__exit(al: &al);
2993	return err;
2994	}
2995
2996	static void trace__set_base_time(struct trace *trace,
2997	struct evsel *evsel,
2998	struct perf_sample *sample)
2999	{
3000	/*
3001	* BPF events were not setting PERF_SAMPLE_TIME, so be more robust
3002	* and don't use sample->time unconditionally, we may end up having
3003	* some other event in the future without PERF_SAMPLE_TIME for good
3004	* reason, i.e. we may not be interested in its timestamps, just in
3005	* it taking place, picking some piece of information when it
3006	* appears in our event stream (vfs_getname comes to mind).
3007	*/
3008	if (trace->base_time == 0 && !trace->full_time &&
3009	(evsel->core.attr.sample_type & PERF_SAMPLE_TIME))
3010	trace->base_time = sample->time;
3011	}
3012
3013	static int trace__process_sample(struct perf_tool *tool,
3014	union perf_event *event,
3015	struct perf_sample *sample,
3016	struct evsel *evsel,
3017	struct machine *machine __maybe_unused)
3018	{
3019	struct trace *trace = container_of(tool, struct trace, tool);
3020	struct thread *thread;
3021	int err = 0;
3022
3023	tracepoint_handler handler = evsel->handler;
3024
3025	thread = machine__findnew_thread(machine: trace->host, pid: sample->pid, tid: sample->tid);
3026	if (thread && thread__is_filtered(thread))
3027	goto out;
3028
3029	trace__set_base_time(trace, evsel, sample);
3030
3031	if (handler) {
3032	++trace->nr_events;
3033	handler(trace, evsel, event, sample);
3034	}
3035	out:
3036	thread__put(thread);
3037	return err;
3038	}
3039
3040	static int trace__record(struct trace *trace, int argc, const char **argv)
3041	{
3042	unsigned int rec_argc, i, j;
3043	const char **rec_argv;
3044	const char * const record_args[] = {
3045	"record",
3046	"-R",
3047	"-m", "1024",
3048	"-c", "1",
3049	};
3050	pid_t pid = getpid();
3051	char *filter = asprintf__tp_filter_pids(1, &pid);
3052	const char * const sc_args[] = { "-e", };
3053	unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
3054	const char * const majpf_args[] = { "-e", "major-faults" };
3055	unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
3056	const char * const minpf_args[] = { "-e", "minor-faults" };
3057	unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
3058	int err = -1;
3059
3060	/* +3 is for the event string below and the pid filter */
3061	rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 +
3062	majpf_args_nr + minpf_args_nr + argc;
3063	rec_argv = calloc(rec_argc + 1, sizeof(char *));
3064
3065	if (rec_argv == NULL || filter == NULL)
3066	goto out_free;
3067
3068	j = 0;
3069	for (i = 0; i < ARRAY_SIZE(record_args); i++)
3070	rec_argv[j++] = record_args[i];
3071
3072	if (trace->trace_syscalls) {
3073	for (i = 0; i < sc_args_nr; i++)
3074	rec_argv[j++] = sc_args[i];
3075
3076	/* event string may be different for older kernels - e.g., RHEL6 */
3077	if (is_valid_tracepoint(event_string: "raw_syscalls:sys_enter"))
3078	rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
3079	else if (is_valid_tracepoint(event_string: "syscalls:sys_enter"))
3080	rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
3081	else {
3082	pr_err("Neither raw_syscalls nor syscalls events exist.\n");
3083	goto out_free;
3084	}
3085	}
3086
3087	rec_argv[j++] = "--filter";
3088	rec_argv[j++] = filter;
3089
3090	if (trace->trace_pgfaults & TRACE_PFMAJ)
3091	for (i = 0; i < majpf_args_nr; i++)
3092	rec_argv[j++] = majpf_args[i];
3093
3094	if (trace->trace_pgfaults & TRACE_PFMIN)
3095	for (i = 0; i < minpf_args_nr; i++)
3096	rec_argv[j++] = minpf_args[i];
3097
3098	for (i = 0; i < (unsigned int)argc; i++)
3099	rec_argv[j++] = argv[i];
3100
3101	err = cmd_record(argc: j, argv: rec_argv);
3102	out_free:
3103	free(filter);
3104	free(rec_argv);
3105	return err;
3106	}
3107
3108	static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
3109
3110	static bool evlist__add_vfs_getname(struct evlist *evlist)
3111	{
3112	bool found = false;
3113	struct evsel *evsel, *tmp;
3114	struct parse_events_error err;
3115	int ret;
3116
3117	parse_events_error__init(err: &err);
3118	ret = parse_events(evlist, str: "probe:vfs_getname*", err: &err);
3119	parse_events_error__exit(err: &err);
3120	if (ret)
3121	return false;
3122
3123	evlist__for_each_entry_safe(evlist, evsel, tmp) {
3124	if (!strstarts(str: evsel__name(evsel), prefix: "probe:vfs_getname"))
3125	continue;
3126
3127	if (evsel__field(evsel, name: "pathname")) {
3128	evsel->handler = trace__vfs_getname;
3129	found = true;
3130	continue;
3131	}
3132
3133	list_del_init(entry: &evsel->core.node);
3134	evsel->evlist = NULL;
3135	evsel__delete(evsel);
3136	}
3137
3138	return found;
3139	}
3140
3141	static struct evsel *evsel__new_pgfault(u64 config)
3142	{
3143	struct evsel *evsel;
3144	struct perf_event_attr attr = {
3145	.type = PERF_TYPE_SOFTWARE,
3146	.mmap_data = 1,
3147	};
3148
3149	attr.config = config;
3150	attr.sample_period = 1;
3151
3152	event_attr_init(attr: &attr);
3153
3154	evsel = evsel__new(attr: &attr);
3155	if (evsel)
3156	evsel->handler = trace__pgfault;
3157
3158	return evsel;
3159	}
3160
3161	static void evlist__free_syscall_tp_fields(struct evlist *evlist)
3162	{
3163	struct evsel *evsel;
3164
3165	evlist__for_each_entry(evlist, evsel) {
3166	evsel_trace__delete(et: evsel->priv);
3167	evsel->priv = NULL;
3168	}
3169	}
3170
3171	static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
3172	{
3173	const u32 type = event->header.type;
3174	struct evsel *evsel;
3175
3176	if (type != PERF_RECORD_SAMPLE) {
3177	trace__process_event(trace, machine: trace->host, event, sample);
3178	return;
3179	}
3180
3181	evsel = evlist__id2evsel(evlist: trace->evlist, id: sample->id);
3182	if (evsel == NULL) {
3183	fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
3184	return;
3185	}
3186
3187	if (evswitch__discard(evswitch: &trace->evswitch, evsel))
3188	return;
3189
3190	trace__set_base_time(trace, evsel, sample);
3191
3192	if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT &&
3193	sample->raw_data == NULL) {
3194	fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
3195	evsel__name(evsel), sample->tid,
3196	sample->cpu, sample->raw_size);
3197	} else {
3198	tracepoint_handler handler = evsel->handler;
3199	handler(trace, evsel, event, sample);
3200	}
3201
3202	if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX)
3203	interrupted = true;
3204	}
3205
3206	static int trace__add_syscall_newtp(struct trace *trace)
3207	{
3208	int ret = -1;
3209	struct evlist *evlist = trace->evlist;
3210	struct evsel *sys_enter, *sys_exit;
3211
3212	sys_enter = perf_evsel__raw_syscall_newtp(direction: "sys_enter", handler: trace__sys_enter);
3213	if (sys_enter == NULL)
3214	goto out;
3215
3216	if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
3217	goto out_delete_sys_enter;
3218
3219	sys_exit = perf_evsel__raw_syscall_newtp(direction: "sys_exit", handler: trace__sys_exit);
3220	if (sys_exit == NULL)
3221	goto out_delete_sys_enter;
3222
3223	if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
3224	goto out_delete_sys_exit;
3225
3226	evsel__config_callchain(evsel: sys_enter, opts: &trace->opts, callchain: &callchain_param);
3227	evsel__config_callchain(evsel: sys_exit, opts: &trace->opts, callchain: &callchain_param);
3228
3229	evlist__add(evlist, entry: sys_enter);
3230	evlist__add(evlist, entry: sys_exit);
3231
3232	if (callchain_param.enabled && !trace->kernel_syscallchains) {
3233	/*
3234	* We're interested only in the user space callchain
3235	* leading to the syscall, allow overriding that for
3236	* debugging reasons using --kernel_syscall_callchains
3237	*/
3238	sys_exit->core.attr.exclude_callchain_kernel = 1;
3239	}
3240
3241	trace->syscalls.events.sys_enter = sys_enter;
3242	trace->syscalls.events.sys_exit = sys_exit;
3243
3244	ret = 0;
3245	out:
3246	return ret;
3247
3248	out_delete_sys_exit:
3249	evsel__delete_priv(evsel: sys_exit);
3250	out_delete_sys_enter:
3251	evsel__delete_priv(evsel: sys_enter);
3252	goto out;
3253	}
3254
3255	static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
3256	{
3257	int err = -1;
3258	struct evsel *sys_exit;
3259	char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
3260	trace->ev_qualifier_ids.nr,
3261	trace->ev_qualifier_ids.entries);
3262
3263	if (filter == NULL)
3264	goto out_enomem;
3265
3266	if (!evsel__append_tp_filter(evsel: trace->syscalls.events.sys_enter, filter)) {
3267	sys_exit = trace->syscalls.events.sys_exit;
3268	err = evsel__append_tp_filter(evsel: sys_exit, filter);
3269	}
3270
3271	free(filter);
3272	out:
3273	return err;
3274	out_enomem:
3275	errno = ENOMEM;
3276	goto out;
3277	}
3278
3279	#ifdef HAVE_BPF_SKEL
3280	static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name)
3281	{
3282	struct bpf_program *pos, *prog = NULL;
3283	const char *sec_name;
3284
3285	if (trace->skel->obj == NULL)
3286	return NULL;
3287
3288	bpf_object__for_each_program(pos, trace->skel->obj) {
3289	sec_name = bpf_program__section_name(pos);
3290	if (sec_name && !strcmp(sec_name, name)) {
3291	prog = pos;
3292	break;
3293	}
3294	}
3295
3296	return prog;
3297	}
3298
3299	static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc,
3300	const char *prog_name, const char *type)
3301	{
3302	struct bpf_program *prog;
3303
3304	if (prog_name == NULL) {
3305	char default_prog_name[256];
3306	scnprintf(default_prog_name, sizeof(default_prog_name), "tp/syscalls/sys_%s_%s", type, sc->name);
3307	prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3308	if (prog != NULL)
3309	goto out_found;
3310	if (sc->fmt && sc->fmt->alias) {
3311	scnprintf(default_prog_name, sizeof(default_prog_name), "tp/syscalls/sys_%s_%s", type, sc->fmt->alias);
3312	prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3313	if (prog != NULL)
3314	goto out_found;
3315	}
3316	goto out_unaugmented;
3317	}
3318
3319	prog = trace__find_bpf_program_by_title(trace, prog_name);
3320
3321	if (prog != NULL) {
3322	out_found:
3323	return prog;
3324	}
3325
3326	pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n",
3327	prog_name, type, sc->name);
3328	out_unaugmented:
3329	return trace->skel->progs.syscall_unaugmented;
3330	}
3331
3332	static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
3333	{
3334	struct syscall *sc = trace__syscall_info(trace, NULL, id);
3335
3336	if (sc == NULL)
3337	return;
3338
3339	sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3340	sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit");
3341	}
3342
3343	static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id)
3344	{
3345	struct syscall *sc = trace__syscall_info(trace, NULL, id);
3346	return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->skel->progs.syscall_unaugmented);
3347	}
3348
3349	static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id)
3350	{
3351	struct syscall *sc = trace__syscall_info(trace, NULL, id);
3352	return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->skel->progs.syscall_unaugmented);
3353	}
3354
3355	static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc)
3356	{
3357	struct tep_format_field *field, *candidate_field;
3358	int id;
3359
3360	/*
3361	* We're only interested in syscalls that have a pointer:
3362	*/
3363	for (field = sc->args; field; field = field->next) {
3364	if (field->flags & TEP_FIELD_IS_POINTER)
3365	goto try_to_find_pair;
3366	}
3367
3368	return NULL;
3369
3370	try_to_find_pair:
3371	for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) {
3372	struct syscall *pair = trace__syscall_info(trace, NULL, id);
3373	struct bpf_program *pair_prog;
3374	bool is_candidate = false;
3375
3376	if (pair == NULL || pair == sc ||
3377	pair->bpf_prog.sys_enter == trace->skel->progs.syscall_unaugmented)
3378	continue;
3379
3380	for (field = sc->args, candidate_field = pair->args;
3381	field && candidate_field; field = field->next, candidate_field = candidate_field->next) {
3382	bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
3383	candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER;
3384
3385	if (is_pointer) {
3386	if (!candidate_is_pointer) {
3387	// The candidate just doesn't copies our pointer arg, might copy other pointers we want.
3388	continue;
3389	}
3390	} else {
3391	if (candidate_is_pointer) {
3392	// The candidate might copy a pointer we don't have, skip it.
3393	goto next_candidate;
3394	}
3395	continue;
3396	}
3397
3398	if (strcmp(field->type, candidate_field->type))
3399	goto next_candidate;
3400
3401	/*
3402	* This is limited in the BPF program but sys_write
3403	* uses "const char *" for its "buf" arg so we need to
3404	* use some heuristic that is kinda future proof...
3405	*/
3406	if (strcmp(field->type, "const char *") == 0 &&
3407	!(strstr(field->name, "name") ||
3408	strstr(field->name, "path") ||
3409	strstr(field->name, "file") ||
3410	strstr(field->name, "root") ||
3411	strstr(field->name, "description")))
3412	goto next_candidate;
3413
3414	is_candidate = true;
3415	}
3416
3417	if (!is_candidate)
3418	goto next_candidate;
3419
3420	/*
3421	* Check if the tentative pair syscall augmenter has more pointers, if it has,
3422	* then it may be collecting that and we then can't use it, as it would collect
3423	* more than what is common to the two syscalls.
3424	*/
3425	if (candidate_field) {
3426	for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next)
3427	if (candidate_field->flags & TEP_FIELD_IS_POINTER)
3428	goto next_candidate;
3429	}
3430
3431	pair_prog = pair->bpf_prog.sys_enter;
3432	/*
3433	* If the pair isn't enabled, then its bpf_prog.sys_enter will not
3434	* have been searched for, so search it here and if it returns the
3435	* unaugmented one, then ignore it, otherwise we'll reuse that BPF
3436	* program for a filtered syscall on a non-filtered one.
3437	*
3438	* For instance, we have "!syscalls:sys_enter_renameat" and that is
3439	* useful for "renameat2".
3440	*/
3441	if (pair_prog == NULL) {
3442	pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3443	if (pair_prog == trace->skel->progs.syscall_unaugmented)
3444	goto next_candidate;
3445	}
3446
3447	pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name);
3448	return pair_prog;
3449	next_candidate:
3450	continue;
3451	}
3452
3453	return NULL;
3454	}
3455
3456	static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
3457	{
3458	int map_enter_fd = bpf_map__fd(trace->skel->maps.syscalls_sys_enter);
3459	int map_exit_fd = bpf_map__fd(trace->skel->maps.syscalls_sys_exit);
3460	int err = 0, key;
3461
3462	for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3463	int prog_fd;
3464
3465	if (!trace__syscall_enabled(trace, key))
3466	continue;
3467
3468	trace__init_syscall_bpf_progs(trace, key);
3469
3470	// It'll get at least the "!raw_syscalls:unaugmented"
3471	prog_fd = trace__bpf_prog_sys_enter_fd(trace, key);
3472	err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3473	if (err)
3474	break;
3475	prog_fd = trace__bpf_prog_sys_exit_fd(trace, key);
3476	err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY);
3477	if (err)
3478	break;
3479	}
3480
3481	/*
3482	* Now lets do a second pass looking for enabled syscalls without
3483	* an augmenter that have a signature that is a superset of another
3484	* syscall with an augmenter so that we can auto-reuse it.
3485	*
3486	* I.e. if we have an augmenter for the "open" syscall that has
3487	* this signature:
3488	*
3489	* int open(const char *pathname, int flags, mode_t mode);
3490	*
3491	* I.e. that will collect just the first string argument, then we
3492	* can reuse it for the 'creat' syscall, that has this signature:
3493	*
3494	* int creat(const char *pathname, mode_t mode);
3495	*
3496	* and for:
3497	*
3498	* int stat(const char *pathname, struct stat *statbuf);
3499	* int lstat(const char *pathname, struct stat *statbuf);
3500	*
3501	* Because the 'open' augmenter will collect the first arg as a string,
3502	* and leave alone all the other args, which already helps with
3503	* beautifying 'stat' and 'lstat''s pathname arg.
3504	*
3505	* Then, in time, when 'stat' gets an augmenter that collects both
3506	* first and second arg (this one on the raw_syscalls:sys_exit prog
3507	* array tail call, then that one will be used.
3508	*/
3509	for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) {
3510	struct syscall *sc = trace__syscall_info(trace, NULL, key);
3511	struct bpf_program *pair_prog;
3512	int prog_fd;
3513
3514	if (sc == NULL || sc->bpf_prog.sys_enter == NULL)
3515	continue;
3516
3517	/*
3518	* For now we're just reusing the sys_enter prog, and if it
3519	* already has an augmenter, we don't need to find one.
3520	*/
3521	if (sc->bpf_prog.sys_enter != trace->skel->progs.syscall_unaugmented)
3522	continue;
3523
3524	/*
3525	* Look at all the other syscalls for one that has a signature
3526	* that is close enough that we can share:
3527	*/
3528	pair_prog = trace__find_usable_bpf_prog_entry(trace, sc);
3529	if (pair_prog == NULL)
3530	continue;
3531
3532	sc->bpf_prog.sys_enter = pair_prog;
3533
3534	/*
3535	* Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter
3536	* with the fd for the program we're reusing:
3537	*/
3538	prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter);
3539	err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3540	if (err)
3541	break;
3542	}
3543
3544	return err;
3545	}
3546	#endif // HAVE_BPF_SKEL
3547
3548	static int trace__set_ev_qualifier_filter(struct trace *trace)
3549	{
3550	if (trace->syscalls.events.sys_enter)
3551	return trace__set_ev_qualifier_tp_filter(trace);
3552	return 0;
3553	}
3554
3555	static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
3556	size_t npids __maybe_unused, pid_t *pids __maybe_unused)
3557	{
3558	int err = 0;
3559	#ifdef HAVE_LIBBPF_SUPPORT
3560	bool value = true;
3561	int map_fd = bpf_map__fd(map);
3562	size_t i;
3563
3564	for (i = 0; i < npids; ++i) {
3565	err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
3566	if (err)
3567	break;
3568	}
3569	#endif
3570	return err;
3571	}
3572
3573	static int trace__set_filter_loop_pids(struct trace *trace)
3574	{
3575	unsigned int nr = 1, err;
3576	pid_t pids[32] = {
3577	getpid(),
3578	};
3579	struct thread *thread = machine__find_thread(machine: trace->host, pid: pids[0], tid: pids[0]);
3580
3581	while (thread && nr < ARRAY_SIZE(pids)) {
3582	struct thread *parent = machine__find_thread(machine: trace->host,
3583	pid: thread__ppid(thread),
3584	tid: thread__ppid(thread));
3585
3586	if (parent == NULL)
3587	break;
3588
3589	if (!strcmp(thread__comm_str(thread: parent), "sshd") ||
3590	strstarts(str: thread__comm_str(thread: parent), prefix: "gnome-terminal")) {
3591	pids[nr++] = thread__tid(thread: parent);
3592	break;
3593	}
3594	thread = parent;
3595	}
3596
3597	err = evlist__append_tp_filter_pids(evlist: trace->evlist, npids: nr, pids);
3598	if (!err && trace->filter_pids.map)
3599	err = bpf_map__set_filter_pids(map: trace->filter_pids.map, npids: nr, pids);
3600
3601	return err;
3602	}
3603
3604	static int trace__set_filter_pids(struct trace *trace)
3605	{
3606	int err = 0;
3607	/*
3608	* Better not use !target__has_task() here because we need to cover the
3609	* case where no threads were specified in the command line, but a
3610	* workload was, and in that case we will fill in the thread_map when
3611	* we fork the workload in evlist__prepare_workload.
3612	*/
3613	if (trace->filter_pids.nr > 0) {
3614	err = evlist__append_tp_filter_pids(evlist: trace->evlist, npids: trace->filter_pids.nr,
3615	pids: trace->filter_pids.entries);
3616	if (!err && trace->filter_pids.map) {
3617	err = bpf_map__set_filter_pids(map: trace->filter_pids.map, npids: trace->filter_pids.nr,
3618	pids: trace->filter_pids.entries);
3619	}
3620	} else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) {
3621	err = trace__set_filter_loop_pids(trace);
3622	}
3623
3624	return err;
3625	}
3626
3627	static int __trace__deliver_event(struct trace *trace, union perf_event *event)
3628	{
3629	struct evlist *evlist = trace->evlist;
3630	struct perf_sample sample;
3631	int err = evlist__parse_sample(evlist, event, sample: &sample);
3632
3633	if (err)
3634	fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
3635	else
3636	trace__handle_event(trace, event, sample: &sample);
3637
3638	return 0;
3639	}
3640
3641	static int __trace__flush_events(struct trace *trace)
3642	{
3643	u64 first = ordered_events__first_time(oe: &trace->oe.data);
3644	u64 flush = trace->oe.last - NSEC_PER_SEC;
3645
3646	/* Is there some thing to flush.. */
3647	if (first && first < flush)
3648	return ordered_events__flush_time(oe: &trace->oe.data, timestamp: flush);
3649
3650	return 0;
3651	}
3652
3653	static int trace__flush_events(struct trace *trace)
3654	{
3655	return !trace->sort_events ? 0 : __trace__flush_events(trace);
3656	}
3657
3658	static int trace__deliver_event(struct trace *trace, union perf_event *event)
3659	{
3660	int err;
3661
3662	if (!trace->sort_events)
3663	return __trace__deliver_event(trace, event);
3664
3665	err = evlist__parse_sample_timestamp(evlist: trace->evlist, event, timestamp: &trace->oe.last);
3666	if (err && err != -1)
3667	return err;
3668
3669	err = ordered_events__queue(oe: &trace->oe.data, event, timestamp: trace->oe.last, file_offset: 0, NULL);
3670	if (err)
3671	return err;
3672
3673	return trace__flush_events(trace);
3674	}
3675
3676	static int ordered_events__deliver_event(struct ordered_events *oe,
3677	struct ordered_event *event)
3678	{
3679	struct trace *trace = container_of(oe, struct trace, oe.data);
3680
3681	return __trace__deliver_event(trace, event: event->event);
3682	}
3683
3684	static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg)
3685	{
3686	struct tep_format_field *field;
3687	struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel);
3688
3689	if (evsel->tp_format == NULL || fmt == NULL)
3690	return NULL;
3691
3692	for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt)
3693	if (strcmp(field->name, arg) == 0)
3694	return fmt;
3695
3696	return NULL;
3697	}
3698
3699	static int trace__expand_filter(struct trace *trace __maybe_unused, struct evsel *evsel)
3700	{
3701	char *tok, *left = evsel->filter, *new_filter = evsel->filter;
3702
3703	while ((tok = strpbrk(left, "=<>!")) != NULL) {
3704	char *right = tok + 1, *right_end;
3705
3706	if (*right == '=')
3707	++right;
3708
3709	while (isspace(*right))
3710	++right;
3711
3712	if (*right == '\0')
3713	break;
3714
3715	while (!isalpha(*left))
3716	if (++left == tok) {
3717	/*
3718	* Bail out, can't find the name of the argument that is being
3719	* used in the filter, let it try to set this filter, will fail later.
3720	*/
3721	return 0;
3722	}
3723
3724	right_end = right + 1;
3725	while (isalnum(*right_end) || *right_end == '_' || *right_end == '|')
3726	++right_end;
3727
3728	if (isalpha(*right)) {
3729	struct syscall_arg_fmt *fmt;
3730	int left_size = tok - left,
3731	right_size = right_end - right;
3732	char arg[128];
3733
3734	while (isspace(left[left_size - 1]))
3735	--left_size;
3736
3737	scnprintf(buf: arg, size: sizeof(arg), fmt: "%.*s", left_size, left);
3738
3739	fmt = evsel__find_syscall_arg_fmt_by_name(evsel, arg);
3740	if (fmt == NULL) {
3741	pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n",
3742	arg, evsel->name, evsel->filter);
3743	return -1;
3744	}
3745
3746	pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ",
3747	arg, (int)(right - tok), tok, right_size, right);
3748
3749	if (fmt->strtoul) {
3750	u64 val;
3751	struct syscall_arg syscall_arg = {
3752	.parm = fmt->parm,
3753	};
3754
3755	if (fmt->strtoul(right, right_size, &syscall_arg, &val)) {
3756	char *n, expansion[19];
3757	int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val);
3758	int expansion_offset = right - new_filter;
3759
3760	pr_debug("%s", expansion);
3761
3762	if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) {
3763	pr_debug(" out of memory!\n");
3764	free(new_filter);
3765	return -1;
3766	}
3767	if (new_filter != evsel->filter)
3768	free(new_filter);
3769	left = n + expansion_offset + expansion_lenght;
3770	new_filter = n;
3771	} else {
3772	pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3773	right_size, right, arg, evsel->name, evsel->filter);
3774	return -1;
3775	}
3776	} else {
3777	pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n",
3778	arg, evsel->name, evsel->filter);
3779	return -1;
3780	}
3781
3782	pr_debug("\n");
3783	} else {
3784	left = right_end;
3785	}
3786	}
3787
3788	if (new_filter != evsel->filter) {
3789	pr_debug("New filter for %s: %s\n", evsel->name, new_filter);
3790	evsel__set_filter(evsel, filter: new_filter);
3791	free(new_filter);
3792	}
3793
3794	return 0;
3795	}
3796
3797	static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel)
3798	{
3799	struct evlist *evlist = trace->evlist;
3800	struct evsel *evsel;
3801
3802	evlist__for_each_entry(evlist, evsel) {
3803	if (evsel->filter == NULL)
3804	continue;
3805
3806	if (trace__expand_filter(trace, evsel)) {
3807	*err_evsel = evsel;
3808	return -1;
3809	}
3810	}
3811
3812	return 0;
3813	}
3814
3815	static int trace__run(struct trace *trace, int argc, const char **argv)
3816	{
3817	struct evlist *evlist = trace->evlist;
3818	struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
3819	int err = -1, i;
3820	unsigned long before;
3821	const bool forks = argc > 0;
3822	bool draining = false;
3823
3824	trace->live = true;
3825
3826	if (!trace->raw_augmented_syscalls) {
3827	if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
3828	goto out_error_raw_syscalls;
3829
3830	if (trace->trace_syscalls)
3831	trace->vfs_getname = evlist__add_vfs_getname(evlist);
3832	}
3833
3834	if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
3835	pgfault_maj = evsel__new_pgfault(config: PERF_COUNT_SW_PAGE_FAULTS_MAJ);
3836	if (pgfault_maj == NULL)
3837	goto out_error_mem;
3838	evsel__config_callchain(evsel: pgfault_maj, opts: &trace->opts, callchain: &callchain_param);
3839	evlist__add(evlist, entry: pgfault_maj);
3840	}
3841
3842	if ((trace->trace_pgfaults & TRACE_PFMIN)) {
3843	pgfault_min = evsel__new_pgfault(config: PERF_COUNT_SW_PAGE_FAULTS_MIN);
3844	if (pgfault_min == NULL)
3845	goto out_error_mem;
3846	evsel__config_callchain(evsel: pgfault_min, opts: &trace->opts, callchain: &callchain_param);
3847	evlist__add(evlist, entry: pgfault_min);
3848	}
3849
3850	/* Enable ignoring missing threads when -u/-p option is defined. */
3851	trace->opts.ignore_missing_thread = trace->opts.target.uid != UINT_MAX || trace->opts.target.pid;
3852
3853	if (trace->sched &&
3854	evlist__add_newtp(evlist, "sched", "sched_stat_runtime", trace__sched_stat_runtime))
3855	goto out_error_sched_stat_runtime;
3856	/*
3857	* If a global cgroup was set, apply it to all the events without an
3858	* explicit cgroup. I.e.:
3859	*
3860	* trace -G A -e sched:*switch
3861	*
3862	* Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
3863	* _and_ sched:sched_switch to the 'A' cgroup, while:
3864	*
3865	* trace -e sched:*switch -G A
3866	*
3867	* will only set the sched:sched_switch event to the 'A' cgroup, all the
3868	* other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
3869	* a cgroup (on the root cgroup, sys wide, etc).
3870	*
3871	* Multiple cgroups:
3872	*
3873	* trace -G A -e sched:*switch -G B
3874	*
3875	* the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
3876	* to the 'B' cgroup.
3877	*
3878	* evlist__set_default_cgroup() grabs a reference of the passed cgroup
3879	* only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
3880	*/
3881	if (trace->cgroup)
3882	evlist__set_default_cgroup(evlist: trace->evlist, cgroup: trace->cgroup);
3883
3884	err = evlist__create_maps(evlist, target: &trace->opts.target);
3885	if (err < 0) {
3886	fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
3887	goto out_delete_evlist;
3888	}
3889
3890	err = trace__symbols_init(trace, evlist);
3891	if (err < 0) {
3892	fprintf(trace->output, "Problems initializing symbol libraries!\n");
3893	goto out_delete_evlist;
3894	}
3895
3896	evlist__config(evlist, opts: &trace->opts, callchain: &callchain_param);
3897
3898	if (forks) {
3899	err = evlist__prepare_workload(evlist, target: &trace->opts.target, argv, pipe_output: false, NULL);
3900	if (err < 0) {
3901	fprintf(trace->output, "Couldn't run the workload!\n");
3902	goto out_delete_evlist;
3903	}
3904	workload_pid = evlist->workload.pid;
3905	}
3906
3907	err = evlist__open(evlist);
3908	if (err < 0)
3909	goto out_error_open;
3910	#ifdef HAVE_BPF_SKEL
3911	if (trace->syscalls.events.bpf_output) {
3912	struct perf_cpu cpu;
3913
3914	/*
3915	* Set up the __augmented_syscalls__ BPF map to hold for each
3916	* CPU the bpf-output event's file descriptor.
3917	*/
3918	perf_cpu_map__for_each_cpu(cpu, i, trace->syscalls.events.bpf_output->core.cpus) {
3919	bpf_map__update_elem(trace->skel->maps.__augmented_syscalls__,
3920	&cpu.cpu, sizeof(int),
3921	xyarray__entry(trace->syscalls.events.bpf_output->core.fd,
3922	cpu.cpu, 0),
3923	sizeof(__u32), BPF_ANY);
3924	}
3925	}
3926	#endif
3927	err = trace__set_filter_pids(trace);
3928	if (err < 0)
3929	goto out_error_mem;
3930
3931	#ifdef HAVE_BPF_SKEL
3932	if (trace->skel && trace->skel->progs.sys_enter)
3933	trace__init_syscalls_bpf_prog_array_maps(trace);
3934	#endif
3935
3936	if (trace->ev_qualifier_ids.nr > 0) {
3937	err = trace__set_ev_qualifier_filter(trace);
3938	if (err < 0)
3939	goto out_errno;
3940
3941	if (trace->syscalls.events.sys_exit) {
3942	pr_debug("event qualifier tracepoint filter: %s\n",
3943	trace->syscalls.events.sys_exit->filter);
3944	}
3945	}
3946
3947	/*
3948	* If the "close" syscall is not traced, then we will not have the
3949	* opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the
3950	* fd->pathname table and were ending up showing the last value set by
3951	* syscalls opening a pathname and associating it with a descriptor or
3952	* reading it from /proc/pid/fd/ in cases where that doesn't make
3953	* sense.
3954	*
3955	* So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is
3956	* not in use.
3957	*/
3958	trace->fd_path_disabled = !trace__syscall_enabled(trace, id: syscalltbl__id(trace->sctbl, "close"));
3959
3960	err = trace__expand_filters(trace, err_evsel: &evsel);
3961	if (err)
3962	goto out_delete_evlist;
3963	err = evlist__apply_filters(evlist, err_evsel: &evsel);
3964	if (err < 0)
3965	goto out_error_apply_filters;
3966
3967	err = evlist__mmap(evlist, pages: trace->opts.mmap_pages);
3968	if (err < 0)
3969	goto out_error_mmap;
3970
3971	if (!target__none(&trace->opts.target) && !trace->opts.target.initial_delay)
3972	evlist__enable(evlist);
3973
3974	if (forks)
3975	evlist__start_workload(evlist);
3976
3977	if (trace->opts.target.initial_delay) {
3978	usleep(trace->opts.target.initial_delay * 1000);
3979	evlist__enable(evlist);
3980	}
3981
3982	trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 ||
3983	perf_thread_map__nr(evlist->core.threads) > 1 ||
3984	evlist__first(evlist)->core.attr.inherit;
3985
3986	/*
3987	* Now that we already used evsel->core.attr to ask the kernel to setup the
3988	* events, lets reuse evsel->core.attr.sample_max_stack as the limit in
3989	* trace__resolve_callchain(), allowing per-event max-stack settings
3990	* to override an explicitly set --max-stack global setting.
3991	*/
3992	evlist__for_each_entry(evlist, evsel) {
3993	if (evsel__has_callchain(evsel) &&
3994	evsel->core.attr.sample_max_stack == 0)
3995	evsel->core.attr.sample_max_stack = trace->max_stack;
3996	}
3997	again:
3998	before = trace->nr_events;
3999
4000	for (i = 0; i < evlist->core.nr_mmaps; i++) {
4001	union perf_event *event;
4002	struct mmap *md;
4003
4004	md = &evlist->mmap[i];
4005	if (perf_mmap__read_init(&md->core) < 0)
4006	continue;
4007
4008	while ((event = perf_mmap__read_event(&md->core)) != NULL) {
4009	++trace->nr_events;
4010
4011	err = trace__deliver_event(trace, event);
4012	if (err)
4013	goto out_disable;
4014
4015	perf_mmap__consume(&md->core);
4016
4017	if (interrupted)
4018	goto out_disable;
4019
4020	if (done && !draining) {
4021	evlist__disable(evlist);
4022	draining = true;
4023	}
4024	}
4025	perf_mmap__read_done(&md->core);
4026	}
4027
4028	if (trace->nr_events == before) {
4029	int timeout = done ? 100 : -1;
4030
4031	if (!draining && evlist__poll(evlist, timeout) > 0) {
4032	if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
4033	draining = true;
4034
4035	goto again;
4036	} else {
4037	if (trace__flush_events(trace))
4038	goto out_disable;
4039	}
4040	} else {
4041	goto again;
4042	}
4043
4044	out_disable:
4045	thread__zput(trace->current);
4046
4047	evlist__disable(evlist);
4048
4049	if (trace->sort_events)
4050	ordered_events__flush(oe: &trace->oe.data, how: OE_FLUSH__FINAL);
4051
4052	if (!err) {
4053	if (trace->summary)
4054	trace__fprintf_thread_summary(trace, trace->output);
4055
4056	if (trace->show_tool_stats) {
4057	fprintf(trace->output, "Stats:\n "
4058	" vfs_getname : %" PRIu64 "\n"
4059	" proc_getname: %" PRIu64 "\n",
4060	trace->stats.vfs_getname,
4061	trace->stats.proc_getname);
4062	}
4063	}
4064
4065	out_delete_evlist:
4066	trace__symbols__exit(trace);
4067	evlist__free_syscall_tp_fields(evlist);
4068	evlist__delete(evlist);
4069	cgroup__put(cgroup: trace->cgroup);
4070	trace->evlist = NULL;
4071	trace->live = false;
4072	return err;
4073	{
4074	char errbuf[BUFSIZ];
4075
4076	out_error_sched_stat_runtime:
4077	tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
4078	goto out_error;
4079
4080	out_error_raw_syscalls:
4081	tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
4082	goto out_error;
4083
4084	out_error_mmap:
4085	evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
4086	goto out_error;
4087
4088	out_error_open:
4089	evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
4090
4091	out_error:
4092	fprintf(trace->output, "%s\n", errbuf);
4093	goto out_delete_evlist;
4094
4095	out_error_apply_filters:
4096	fprintf(trace->output,
4097	"Failed to set filter \"%s\" on event %s with %d (%s)\n",
4098	evsel->filter, evsel__name(evsel), errno,
4099	str_error_r(errno, errbuf, sizeof(errbuf)));
4100	goto out_delete_evlist;
4101	}
4102	out_error_mem:
4103	fprintf(trace->output, "Not enough memory to run!\n");
4104	goto out_delete_evlist;
4105
4106	out_errno:
4107	fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
4108	goto out_delete_evlist;
4109	}
4110
4111	static int trace__replay(struct trace *trace)
4112	{
4113	const struct evsel_str_handler handlers[] = {
4114	{ "probe:vfs_getname", trace__vfs_getname, },
4115	};
4116	struct perf_data data = {
4117	.path = input_name,
4118	.mode = PERF_DATA_MODE_READ,
4119	.force = trace->force,
4120	};
4121	struct perf_session *session;
4122	struct evsel *evsel;
4123	int err = -1;
4124
4125	trace->tool.sample = trace__process_sample;
4126	trace->tool.mmap = perf_event__process_mmap;
4127	trace->tool.mmap2 = perf_event__process_mmap2;
4128	trace->tool.comm = perf_event__process_comm;
4129	trace->tool.exit = perf_event__process_exit;
4130	trace->tool.fork = perf_event__process_fork;
4131	trace->tool.attr = perf_event__process_attr;
4132	trace->tool.tracing_data = perf_event__process_tracing_data;
4133	trace->tool.build_id = perf_event__process_build_id;
4134	trace->tool.namespaces = perf_event__process_namespaces;
4135
4136	trace->tool.ordered_events = true;
4137	trace->tool.ordering_requires_timestamps = true;
4138
4139	/* add tid to output */
4140	trace->multiple_threads = true;
4141
4142	session = perf_session__new(data: &data, tool: &trace->tool);
4143	if (IS_ERR(ptr: session))
4144	return PTR_ERR(ptr: session);
4145
4146	if (trace->opts.target.pid)
4147	symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
4148
4149	if (trace->opts.target.tid)
4150	symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
4151
4152	if (symbol__init(env: &session->header.env) < 0)
4153	goto out;
4154
4155	trace->host = &session->machines.host;
4156
4157	err = perf_session__set_tracepoints_handlers(session, handlers);
4158	if (err)
4159	goto out;
4160
4161	evsel = evlist__find_tracepoint_by_name(evlist: session->evlist, name: "raw_syscalls:sys_enter");
4162	trace->syscalls.events.sys_enter = evsel;
4163	/* older kernels have syscalls tp versus raw_syscalls */
4164	if (evsel == NULL)
4165	evsel = evlist__find_tracepoint_by_name(evlist: session->evlist, name: "syscalls:sys_enter");
4166
4167	if (evsel &&
4168	(evsel__init_raw_syscall_tp(evsel, handler: trace__sys_enter) < 0 ||
4169	perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
4170	pr_err("Error during initialize raw_syscalls:sys_enter event\n");
4171	goto out;
4172	}
4173
4174	evsel = evlist__find_tracepoint_by_name(evlist: session->evlist, name: "raw_syscalls:sys_exit");
4175	trace->syscalls.events.sys_exit = evsel;
4176	if (evsel == NULL)
4177	evsel = evlist__find_tracepoint_by_name(evlist: session->evlist, name: "syscalls:sys_exit");
4178	if (evsel &&
4179	(evsel__init_raw_syscall_tp(evsel, handler: trace__sys_exit) < 0 ||
4180	perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
4181	pr_err("Error during initialize raw_syscalls:sys_exit event\n");
4182	goto out;
4183	}
4184
4185	evlist__for_each_entry(session->evlist, evsel) {
4186	if (evsel->core.attr.type == PERF_TYPE_SOFTWARE &&
4187	(evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
4188	evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
4189	evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS))
4190	evsel->handler = trace__pgfault;
4191	}
4192
4193	setup_pager();
4194
4195	err = perf_session__process_events(session);
4196	if (err)
4197	pr_err("Failed to process events, error %d", err);
4198
4199	else if (trace->summary)
4200	trace__fprintf_thread_summary(trace, trace->output);
4201
4202	out:
4203	perf_session__delete(session);
4204
4205	return err;
4206	}
4207
4208	static size_t trace__fprintf_threads_header(FILE *fp)
4209	{
4210	size_t printed;
4211
4212	printed = fprintf(fp, "\n Summary of events:\n\n");
4213
4214	return printed;
4215	}
4216
4217	DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
4218	struct syscall_stats *stats;
4219	double msecs;
4220	int syscall;
4221	)
4222	{
4223	struct int_node *source = rb_entry(nd, struct int_node, rb_node);
4224	struct syscall_stats *stats = source->priv;
4225
4226	entry->syscall = source->i;
4227	entry->stats = stats;
4228	entry->msecs = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0;
4229	}
4230
4231	static size_t thread__dump_stats(struct thread_trace *ttrace,
4232	struct trace *trace, FILE *fp)
4233	{
4234	size_t printed = 0;
4235	struct syscall *sc;
4236	struct rb_node *nd;
4237	DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
4238
4239	if (syscall_stats == NULL)
4240	return 0;
4241
4242	printed += fprintf(fp, "\n");
4243
4244	printed += fprintf(fp, " syscall calls errors total min avg max stddev\n");
4245	printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n");
4246	printed += fprintf(fp, " --------------- -------- ------ -------- --------- --------- --------- ------\n");
4247
4248	resort_rb__for_each_entry(nd, syscall_stats) {
4249	struct syscall_stats *stats = syscall_stats_entry->stats;
4250	if (stats) {
4251	double min = (double)(stats->stats.min) / NSEC_PER_MSEC;
4252	double max = (double)(stats->stats.max) / NSEC_PER_MSEC;
4253	double avg = avg_stats(&stats->stats);
4254	double pct;
4255	u64 n = (u64)stats->stats.n;
4256
4257	pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0;
4258	avg /= NSEC_PER_MSEC;
4259
4260	sc = &trace->syscalls.table[syscall_stats_entry->syscall];
4261	printed += fprintf(fp, " %-15s", sc->name);
4262	printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f",
4263	n, stats->nr_failures, syscall_stats_entry->msecs, min, avg);
4264	printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
4265
4266	if (trace->errno_summary && stats->nr_failures) {
4267	const char *arch_name = perf_env__arch(trace->host->env);
4268	int e;
4269
4270	for (e = 0; e < stats->max_errno; ++e) {
4271	if (stats->errnos[e] != 0)
4272	fprintf(fp, "\t\t\t\t%s: %d\n", arch_syscalls__strerrno(arch_name, e + 1), stats->errnos[e]);
4273	}
4274	}
4275	}
4276	}
4277
4278	resort_rb__delete(syscall_stats);
4279	printed += fprintf(fp, "\n\n");
4280
4281	return printed;
4282	}
4283
4284	static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
4285	{
4286	size_t printed = 0;
4287	struct thread_trace *ttrace = thread__priv(thread);
4288	double ratio;
4289
4290	if (ttrace == NULL)
4291	return 0;
4292
4293	ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
4294
4295	printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread__tid(thread));
4296	printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
4297	printed += fprintf(fp, "%.1f%%", ratio);
4298	if (ttrace->pfmaj)
4299	printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
4300	if (ttrace->pfmin)
4301	printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
4302	if (trace->sched)
4303	printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
4304	else if (fputc('\n', fp) != EOF)
4305	++printed;
4306
4307	printed += thread__dump_stats(ttrace, trace, fp);
4308
4309	return printed;
4310	}
4311
4312	static unsigned long thread__nr_events(struct thread_trace *ttrace)
4313	{
4314	return ttrace ? ttrace->nr_events : 0;
4315	}
4316
4317	DEFINE_RESORT_RB(threads,
4318	(thread__nr_events(thread__priv(a->thread)) <
4319	thread__nr_events(thread__priv(b->thread))),
4320	struct thread *thread;
4321	)
4322	{
4323	entry->thread = rb_entry(nd, struct thread_rb_node, rb_node)->thread;
4324	}
4325
4326	static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
4327	{
4328	size_t printed = trace__fprintf_threads_header(fp);
4329	struct rb_node *nd;
4330	int i;
4331
4332	for (i = 0; i < THREADS__TABLE_SIZE; i++) {
4333	DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i);
4334
4335	if (threads == NULL) {
4336	fprintf(fp, "%s", "Error sorting output by nr_events!\n");
4337	return 0;
4338	}
4339
4340	resort_rb__for_each_entry(nd, threads)
4341	printed += trace__fprintf_thread(fp, threads_entry->thread, trace);
4342
4343	resort_rb__delete(threads);
4344	}
4345	return printed;
4346	}
4347
4348	static int trace__set_duration(const struct option *opt, const char *str,
4349	int unset __maybe_unused)
4350	{
4351	struct trace *trace = opt->value;
4352
4353	trace->duration_filter = atof(str);
4354	return 0;
4355	}
4356
4357	static int trace__set_filter_pids_from_option(const struct option *opt, const char *str,
4358	int unset __maybe_unused)
4359	{
4360	int ret = -1;
4361	size_t i;
4362	struct trace *trace = opt->value;
4363	/*
4364	* FIXME: introduce a intarray class, plain parse csv and create a
4365	* { int nr, int entries[] } struct...
4366	*/
4367	struct intlist *list = intlist__new(slist: str);
4368
4369	if (list == NULL)
4370	return -1;
4371
4372	i = trace->filter_pids.nr = intlist__nr_entries(ilist: list) + 1;
4373	trace->filter_pids.entries = calloc(i, sizeof(pid_t));
4374
4375	if (trace->filter_pids.entries == NULL)
4376	goto out;
4377
4378	trace->filter_pids.entries[0] = getpid();
4379
4380	for (i = 1; i < trace->filter_pids.nr; ++i)
4381	trace->filter_pids.entries[i] = intlist__entry(ilist: list, idx: i - 1)->i;
4382
4383	intlist__delete(ilist: list);
4384	ret = 0;
4385	out:
4386	return ret;
4387	}
4388
4389	static int trace__open_output(struct trace *trace, const char *filename)
4390	{
4391	struct stat st;
4392
4393	if (!stat(filename, &st) && st.st_size) {
4394	char oldname[PATH_MAX];
4395
4396	scnprintf(buf: oldname, size: sizeof(oldname), fmt: "%s.old", filename);
4397	unlink(oldname);
4398	rename(filename, oldname);
4399	}
4400
4401	trace->output = fopen(filename, "w");
4402
4403	return trace->output == NULL ? -errno : 0;
4404	}
4405
4406	static int parse_pagefaults(const struct option *opt, const char *str,
4407	int unset __maybe_unused)
4408	{
4409	int *trace_pgfaults = opt->value;
4410
4411	if (strcmp(str, "all") == 0)
4412	*trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
4413	else if (strcmp(str, "maj") == 0)
4414	*trace_pgfaults |= TRACE_PFMAJ;
4415	else if (strcmp(str, "min") == 0)
4416	*trace_pgfaults |= TRACE_PFMIN;
4417	else
4418	return -1;
4419
4420	return 0;
4421	}
4422
4423	static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler)
4424	{
4425	struct evsel *evsel;
4426
4427	evlist__for_each_entry(evlist, evsel) {
4428	if (evsel->handler == NULL)
4429	evsel->handler = handler;
4430	}
4431	}
4432
4433	static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name)
4434	{
4435	struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
4436
4437	if (fmt) {
4438	const struct syscall_fmt *scfmt = syscall_fmt__find(name);
4439
4440	if (scfmt) {
4441	int skip = 0;
4442
4443	if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 ||
4444	strcmp(evsel->tp_format->format.fields->name, "nr") == 0)
4445	++skip;
4446
4447	memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt));
4448	}
4449	}
4450	}
4451
4452	static int evlist__set_syscall_tp_fields(struct evlist *evlist)
4453	{
4454	struct evsel *evsel;
4455
4456	evlist__for_each_entry(evlist, evsel) {
4457	if (evsel->priv || !evsel->tp_format)
4458	continue;
4459
4460	if (strcmp(evsel->tp_format->system, "syscalls")) {
4461	evsel__init_tp_arg_scnprintf(evsel);
4462	continue;
4463	}
4464
4465	if (evsel__init_syscall_tp(evsel))
4466	return -1;
4467
4468	if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
4469	struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4470
4471	if (__tp_field__init_ptr(field: &sc->args, offset: sc->id.offset + sizeof(u64)))
4472	return -1;
4473
4474	evsel__set_syscall_arg_fmt(evsel, name: evsel->tp_format->name + sizeof("sys_enter_") - 1);
4475	} else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
4476	struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4477
4478	if (__tp_field__init_uint(field: &sc->ret, size: sizeof(u64), offset: sc->id.offset + sizeof(u64), needs_swap: evsel->needs_swap))
4479	return -1;
4480
4481	evsel__set_syscall_arg_fmt(evsel, name: evsel->tp_format->name + sizeof("sys_exit_") - 1);
4482	}
4483	}
4484
4485	return 0;
4486	}
4487
4488	/*
4489	* XXX: Hackish, just splitting the combined -e+--event (syscalls
4490	* (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
4491	* existing facilities unchanged (trace->ev_qualifier + parse_options()).
4492	*
4493	* It'd be better to introduce a parse_options() variant that would return a
4494	* list with the terms it didn't match to an event...
4495	*/
4496	static int trace__parse_events_option(const struct option *opt, const char *str,
4497	int unset __maybe_unused)
4498	{
4499	struct trace *trace = (struct trace *)opt->value;
4500	const char *s = str;
4501	char *sep = NULL, *lists[2] = { NULL, NULL, };
4502	int len = strlen(str) + 1, err = -1, list, idx;
4503	char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
4504	char group_name[PATH_MAX];
4505	const struct syscall_fmt *fmt;
4506
4507	if (strace_groups_dir == NULL)
4508	return -1;
4509
4510	if (*s == '!') {
4511	++s;
4512	trace->not_ev_qualifier = true;
4513	}
4514
4515	while (1) {
4516	if ((sep = strchr(s, ',')) != NULL)
4517	*sep = '\0';
4518
4519	list = 0;
4520	if (syscalltbl__id(trace->sctbl, s) >= 0 ||
4521	syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
4522	list = 1;
4523	goto do_concat;
4524	}
4525
4526	fmt = syscall_fmt__find_by_alias(alias: s);
4527	if (fmt != NULL) {
4528	list = 1;
4529	s = fmt->name;
4530	} else {
4531	path__join(bf: group_name, size: sizeof(group_name), path1: strace_groups_dir, path2: s);
4532	if (access(group_name, R_OK) == 0)
4533	list = 1;
4534	}
4535	do_concat:
4536	if (lists[list]) {
4537	sprintf(buf: lists[list] + strlen(lists[list]), fmt: ",%s", s);
4538	} else {
4539	lists[list] = malloc(len);
4540	if (lists[list] == NULL)
4541	goto out;
4542	strcpy(p: lists[list], q: s);
4543	}
4544
4545	if (!sep)
4546	break;
4547
4548	*sep = ',';
4549	s = sep + 1;
4550	}
4551
4552	if (lists[1] != NULL) {
4553	struct strlist_config slist_config = {
4554	.dirname = strace_groups_dir,
4555	};
4556
4557	trace->ev_qualifier = strlist__new(slist: lists[1], config: &slist_config);
4558	if (trace->ev_qualifier == NULL) {
4559	fputs("Not enough memory to parse event qualifier", trace->output);
4560	goto out;
4561	}
4562
4563	if (trace__validate_ev_qualifier(trace))
4564	goto out;
4565	trace->trace_syscalls = true;
4566	}
4567
4568	err = 0;
4569
4570	if (lists[0]) {
4571	struct parse_events_option_args parse_events_option_args = {
4572	.evlistp = &trace->evlist,
4573	};
4574	struct option o = {
4575	.value = &parse_events_option_args,
4576	};
4577	err = parse_events_option(opt: &o, str: lists[0], unset: 0);
4578	}
4579	out:
4580	free(strace_groups_dir);
4581	free(lists[0]);
4582	free(lists[1]);
4583	if (sep)
4584	*sep = ',';
4585
4586	return err;
4587	}
4588
4589	static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
4590	{
4591	struct trace *trace = opt->value;
4592
4593	if (!list_empty(head: &trace->evlist->core.entries)) {
4594	struct option o = {
4595	.value = &trace->evlist,
4596	};
4597	return parse_cgroups(opt: &o, str, unset);
4598	}
4599	trace->cgroup = evlist__findnew_cgroup(evlist: trace->evlist, name: str);
4600
4601	return 0;
4602	}
4603
4604	static int trace__config(const char *var, const char *value, void *arg)
4605	{
4606	struct trace *trace = arg;
4607	int err = 0;
4608
4609	if (!strcmp(var, "trace.add_events")) {
4610	trace->perfconfig_events = strdup(value);
4611	if (trace->perfconfig_events == NULL) {
4612	pr_err("Not enough memory for %s\n", "trace.add_events");
4613	return -1;
4614	}
4615	} else if (!strcmp(var, "trace.show_timestamp")) {
4616	trace->show_tstamp = perf_config_bool(var, value);
4617	} else if (!strcmp(var, "trace.show_duration")) {
4618	trace->show_duration = perf_config_bool(var, value);
4619	} else if (!strcmp(var, "trace.show_arg_names")) {
4620	trace->show_arg_names = perf_config_bool(var, value);
4621	if (!trace->show_arg_names)
4622	trace->show_zeros = true;
4623	} else if (!strcmp(var, "trace.show_zeros")) {
4624	bool new_show_zeros = perf_config_bool(var, value);
4625	if (!trace->show_arg_names && !new_show_zeros) {
4626	pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n");
4627	goto out;
4628	}
4629	trace->show_zeros = new_show_zeros;
4630	} else if (!strcmp(var, "trace.show_prefix")) {
4631	trace->show_string_prefix = perf_config_bool(var, value);
4632	} else if (!strcmp(var, "trace.no_inherit")) {
4633	trace->opts.no_inherit = perf_config_bool(var, value);
4634	} else if (!strcmp(var, "trace.args_alignment")) {
4635	int args_alignment = 0;
4636	if (perf_config_int(dest: &args_alignment, var, value) == 0)
4637	trace->args_alignment = args_alignment;
4638	} else if (!strcmp(var, "trace.tracepoint_beautifiers")) {
4639	if (strcasecmp(s1: value, s2: "libtraceevent") == 0)
4640	trace->libtraceevent_print = true;
4641	else if (strcasecmp(s1: value, s2: "libbeauty") == 0)
4642	trace->libtraceevent_print = false;
4643	}
4644	out:
4645	return err;
4646	}
4647
4648	static void trace__exit(struct trace *trace)
4649	{
4650	int i;
4651
4652	strlist__delete(slist: trace->ev_qualifier);
4653	zfree(&trace->ev_qualifier_ids.entries);
4654	if (trace->syscalls.table) {
4655	for (i = 0; i <= trace->sctbl->syscalls.max_id; i++)
4656	syscall__exit(sc: &trace->syscalls.table[i]);
4657	zfree(&trace->syscalls.table);
4658	}
4659	syscalltbl__delete(trace->sctbl);
4660	zfree(&trace->perfconfig_events);
4661	}
4662
4663	#ifdef HAVE_BPF_SKEL
4664	static int bpf__setup_bpf_output(struct evlist *evlist)
4665	{
4666	int err = parse_event(evlist, "bpf-output/no-inherit=1,name=__augmented_syscalls__/");
4667
4668	if (err)
4669	pr_debug("ERROR: failed to create the \"__augmented_syscalls__\" bpf-output event\n");
4670
4671	return err;
4672	}
4673	#endif
4674
4675	int cmd_trace(int argc, const char **argv)
4676	{
4677	const char *trace_usage[] = {
4678	"perf trace [<options>] [<command>]",
4679	"perf trace [<options>] -- <command> [<options>]",
4680	"perf trace record [<options>] [<command>]",
4681	"perf trace record [<options>] -- <command> [<options>]",
4682	NULL
4683	};
4684	struct trace trace = {
4685	.opts = {
4686	.target = {
4687	.uid = UINT_MAX,
4688	.uses_mmap = true,
4689	},
4690	.user_freq = UINT_MAX,
4691	.user_interval = ULLONG_MAX,
4692	.no_buffering = true,
4693	.mmap_pages = UINT_MAX,
4694	},
4695	.output = stderr,
4696	.show_comm = true,
4697	.show_tstamp = true,
4698	.show_duration = true,
4699	.show_arg_names = true,
4700	.args_alignment = 70,
4701	.trace_syscalls = false,
4702	.kernel_syscallchains = false,
4703	.max_stack = UINT_MAX,
4704	.max_events = ULONG_MAX,
4705	};
4706	const char *output_name = NULL;
4707	const struct option trace_options[] = {
4708	OPT_CALLBACK('e', "event", &trace, "event",
4709	"event/syscall selector. use 'perf list' to list available events",
4710	trace__parse_events_option),
4711	OPT_CALLBACK(0, "filter", &trace.evlist, "filter",
4712	"event filter", parse_filter),
4713	OPT_BOOLEAN(0, "comm", &trace.show_comm,
4714	"show the thread COMM next to its id"),
4715	OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
4716	OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
4717	trace__parse_events_option),
4718	OPT_STRING('o', "output", &output_name, "file", "output file name"),
4719	OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
4720	OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
4721	"trace events on existing process id"),
4722	OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
4723	"trace events on existing thread id"),
4724	OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
4725	"pids to filter (by the kernel)", trace__set_filter_pids_from_option),
4726	OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
4727	"system-wide collection from all CPUs"),
4728	OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
4729	"list of cpus to monitor"),
4730	OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
4731	"child tasks do not inherit counters"),
4732	OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
4733	"number of mmap data pages", evlist__parse_mmap_pages),
4734	OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
4735	"user to profile"),
4736	OPT_CALLBACK(0, "duration", &trace, "float",
4737	"show only events with duration > N.M ms",
4738	trace__set_duration),
4739	OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
4740	OPT_INCR('v', "verbose", &verbose, "be more verbose"),
4741	OPT_BOOLEAN('T', "time", &trace.full_time,
4742	"Show full timestamp, not time relative to first start"),
4743	OPT_BOOLEAN(0, "failure", &trace.failure_only,
4744	"Show only syscalls that failed"),
4745	OPT_BOOLEAN('s', "summary", &trace.summary_only,
4746	"Show only syscall summary with statistics"),
4747	OPT_BOOLEAN('S', "with-summary", &trace.summary,
4748	"Show all syscalls and summary with statistics"),
4749	OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary,
4750	"Show errno stats per syscall, use with -s or -S"),
4751	OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
4752	"Trace pagefaults", parse_pagefaults, "maj"),
4753	OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
4754	OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
4755	OPT_CALLBACK(0, "call-graph", &trace.opts,
4756	"record_mode[,record_size]", record_callchain_help,
4757	&record_parse_callchain_opt),
4758	OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print,
4759	"Use libtraceevent to print the tracepoint arguments."),
4760	OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
4761	"Show the kernel callchains on the syscall exit path"),
4762	OPT_ULONG(0, "max-events", &trace.max_events,
4763	"Set the maximum number of events to print, exit after that is reached. "),
4764	OPT_UINTEGER(0, "min-stack", &trace.min_stack,
4765	"Set the minimum stack depth when parsing the callchain, "
4766	"anything below the specified depth will be ignored."),
4767	OPT_UINTEGER(0, "max-stack", &trace.max_stack,
4768	"Set the maximum stack depth when parsing the callchain, "
4769	"anything beyond the specified depth will be ignored. "
4770	"Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
4771	OPT_BOOLEAN(0, "sort-events", &trace.sort_events,
4772	"Sort batch of events before processing, use if getting out of order events"),
4773	OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
4774	"print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
4775	OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
4776	"per thread proc mmap processing timeout in ms"),
4777	OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
4778	trace__parse_cgroups),
4779	OPT_INTEGER('D', "delay", &trace.opts.target.initial_delay,
4780	"ms to wait before starting measurement after program "
4781	"start"),
4782	OPTS_EVSWITCH(&trace.evswitch),
4783	OPT_END()
4784	};
4785	bool __maybe_unused max_stack_user_set = true;
4786	bool mmap_pages_user_set = true;
4787	struct evsel *evsel;
4788	const char * const trace_subcommands[] = { "record", NULL };
4789	int err = -1;
4790	char bf[BUFSIZ];
4791	struct sigaction sigchld_act;
4792
4793	signal(SIGSEGV, sighandler_dump_stack);
4794	signal(SIGFPE, sighandler_dump_stack);
4795	signal(SIGINT, sighandler_interrupt);
4796
4797	memset(&sigchld_act, 0, sizeof(sigchld_act));
4798	sigchld_act.sa_flags = SA_SIGINFO;
4799	sigchld_act.sa_sigaction = sighandler_chld;
4800	sigaction(SIGCHLD, &sigchld_act, NULL);
4801
4802	trace.evlist = evlist__new();
4803	trace.sctbl = syscalltbl__new();
4804
4805	if (trace.evlist == NULL || trace.sctbl == NULL) {
4806	pr_err("Not enough memory to run!\n");
4807	err = -ENOMEM;
4808	goto out;
4809	}
4810
4811	/*
4812	* Parsing .perfconfig may entail creating a BPF event, that may need
4813	* to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting
4814	* is too small. This affects just this process, not touching the
4815	* global setting. If it fails we'll get something in 'perf trace -v'
4816	* to help diagnose the problem.
4817	*/
4818	rlimit__bump_memlock();
4819
4820	err = perf_config(fn: trace__config, &trace);
4821	if (err)
4822	goto out;
4823
4824	argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
4825	trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
4826
4827	/*
4828	* Here we already passed thru trace__parse_events_option() and it has
4829	* already figured out if -e syscall_name, if not but if --event
4830	* foo:bar was used, the user is interested _just_ in those, say,
4831	* tracepoint events, not in the strace-like syscall-name-based mode.
4832	*
4833	* This is important because we need to check if strace-like mode is
4834	* needed to decided if we should filter out the eBPF
4835	* __augmented_syscalls__ code, if it is in the mix, say, via
4836	* .perfconfig trace.add_events, and filter those out.
4837	*/
4838	if (!trace.trace_syscalls && !trace.trace_pgfaults &&
4839	trace.evlist->core.nr_entries == 0 /* Was --events used? */) {
4840	trace.trace_syscalls = true;
4841	}
4842	/*
4843	* Now that we have --verbose figured out, lets see if we need to parse
4844	* events from .perfconfig, so that if those events fail parsing, say some
4845	* BPF program fails, then we'll be able to use --verbose to see what went
4846	* wrong in more detail.
4847	*/
4848	if (trace.perfconfig_events != NULL) {
4849	struct parse_events_error parse_err;
4850
4851	parse_events_error__init(err: &parse_err);
4852	err = parse_events(evlist: trace.evlist, str: trace.perfconfig_events, err: &parse_err);
4853	if (err)
4854	parse_events_error__print(err: &parse_err, event: trace.perfconfig_events);
4855	parse_events_error__exit(err: &parse_err);
4856	if (err)
4857	goto out;
4858	}
4859
4860	if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
4861	usage_with_options_msg(trace_usage, trace_options,
4862	"cgroup monitoring only available in system-wide mode");
4863	}
4864
4865	#ifdef HAVE_BPF_SKEL
4866	if (!trace.trace_syscalls)
4867	goto skip_augmentation;
4868
4869	trace.skel = augmented_raw_syscalls_bpf__open();
4870	if (!trace.skel) {
4871	pr_debug("Failed to open augmented syscalls BPF skeleton");
4872	} else {
4873	/*
4874	* Disable attaching the BPF programs except for sys_enter and
4875	* sys_exit that tail call into this as necessary.
4876	*/
4877	struct bpf_program *prog;
4878
4879	bpf_object__for_each_program(prog, trace.skel->obj) {
4880	if (prog != trace.skel->progs.sys_enter && prog != trace.skel->progs.sys_exit)
4881	bpf_program__set_autoattach(prog, /*autoattach=*/false);
4882	}
4883
4884	err = augmented_raw_syscalls_bpf__load(trace.skel);
4885
4886	if (err < 0) {
4887	libbpf_strerror(err, bf, sizeof(bf));
4888	pr_debug("Failed to load augmented syscalls BPF skeleton: %s\n", bf);
4889	} else {
4890	augmented_raw_syscalls_bpf__attach(trace.skel);
4891	trace__add_syscall_newtp(&trace);
4892	}
4893	}
4894
4895	err = bpf__setup_bpf_output(trace.evlist);
4896	if (err) {
4897	libbpf_strerror(err, bf, sizeof(bf));
4898	pr_err("ERROR: Setup BPF output event failed: %s\n", bf);
4899	goto out;
4900	}
4901	trace.syscalls.events.bpf_output = evlist__last(trace.evlist);
4902	assert(!strcmp(evsel__name(trace.syscalls.events.bpf_output), "__augmented_syscalls__"));
4903	skip_augmentation:
4904	#endif
4905	err = -1;
4906
4907	if (trace.trace_pgfaults) {
4908	trace.opts.sample_address = true;
4909	trace.opts.sample_time = true;
4910	}
4911
4912	if (trace.opts.mmap_pages == UINT_MAX)
4913	mmap_pages_user_set = false;
4914
4915	if (trace.max_stack == UINT_MAX) {
4916	trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
4917	max_stack_user_set = false;
4918	}
4919
4920	#ifdef HAVE_DWARF_UNWIND_SUPPORT
4921	if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
4922	record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
4923	}
4924	#endif
4925
4926	if (callchain_param.enabled) {
4927	if (!mmap_pages_user_set && geteuid() == 0)
4928	trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
4929
4930	symbol_conf.use_callchain = true;
4931	}
4932
4933	if (trace.evlist->core.nr_entries > 0) {
4934	evlist__set_default_evsel_handler(evlist: trace.evlist, handler: trace__event_handler);
4935	if (evlist__set_syscall_tp_fields(evlist: trace.evlist)) {
4936	perror("failed to set syscalls:* tracepoint fields");
4937	goto out;
4938	}
4939	}
4940
4941	if (trace.sort_events) {
4942	ordered_events__init(oe: &trace.oe.data, deliver: ordered_events__deliver_event, data: &trace);
4943	ordered_events__set_copy_on_queue(oe: &trace.oe.data, copy: true);
4944	}
4945
4946	/*
4947	* If we are augmenting syscalls, then combine what we put in the
4948	* __augmented_syscalls__ BPF map with what is in the
4949	* syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF,
4950	* combining raw_syscalls:sys_enter with raw_syscalls:sys_exit.
4951	*
4952	* We'll switch to look at two BPF maps, one for sys_enter and the
4953	* other for sys_exit when we start augmenting the sys_exit paths with
4954	* buffers that are being copied from kernel to userspace, think 'read'
4955	* syscall.
4956	*/
4957	if (trace.syscalls.events.bpf_output) {
4958	evlist__for_each_entry(trace.evlist, evsel) {
4959	bool raw_syscalls_sys_exit = strcmp(evsel__name(evsel), "raw_syscalls:sys_exit") == 0;
4960
4961	if (raw_syscalls_sys_exit) {
4962	trace.raw_augmented_syscalls = true;
4963	goto init_augmented_syscall_tp;
4964	}
4965
4966	if (trace.syscalls.events.bpf_output->priv == NULL &&
4967	strstr(evsel__name(evsel), "syscalls:sys_enter")) {
4968	struct evsel *augmented = trace.syscalls.events.bpf_output;
4969	if (evsel__init_augmented_syscall_tp(evsel: augmented, tp: evsel) ||
4970	evsel__init_augmented_syscall_tp_args(evsel: augmented))
4971	goto out;
4972	/*
4973	* Augmented is __augmented_syscalls__ BPF_OUTPUT event
4974	* Above we made sure we can get from the payload the tp fields
4975	* that we get from syscalls:sys_enter tracefs format file.
4976	*/
4977	augmented->handler = trace__sys_enter;
4978	/*
4979	* Now we do the same for the *syscalls:sys_enter event so that
4980	* if we handle it directly, i.e. if the BPF prog returns 0 so
4981	* as not to filter it, then we'll handle it just like we would
4982	* for the BPF_OUTPUT one:
4983	*/
4984	if (evsel__init_augmented_syscall_tp(evsel, tp: evsel) ||
4985	evsel__init_augmented_syscall_tp_args(evsel))
4986	goto out;
4987	evsel->handler = trace__sys_enter;
4988	}
4989
4990	if (strstarts(str: evsel__name(evsel), prefix: "syscalls:sys_exit_")) {
4991	struct syscall_tp *sc;
4992	init_augmented_syscall_tp:
4993	if (evsel__init_augmented_syscall_tp(evsel, tp: evsel))
4994	goto out;
4995	sc = __evsel__syscall_tp(evsel);
4996	/*
4997	* For now with BPF raw_augmented we hook into
4998	* raw_syscalls:sys_enter and there we get all
4999	* 6 syscall args plus the tracepoint common
5000	* fields and the syscall_nr (another long).
5001	* So we check if that is the case and if so
5002	* don't look after the sc->args_size but
5003	* always after the full raw_syscalls:sys_enter
5004	* payload, which is fixed.
5005	*
5006	* We'll revisit this later to pass
5007	* s->args_size to the BPF augmenter (now
5008	* tools/perf/examples/bpf/augmented_raw_syscalls.c,
5009	* so that it copies only what we need for each
5010	* syscall, like what happens when we use
5011	* syscalls:sys_enter_NAME, so that we reduce
5012	* the kernel/userspace traffic to just what is
5013	* needed for each syscall.
5014	*/
5015	if (trace.raw_augmented_syscalls)
5016	trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset;
5017	evsel__init_augmented_syscall_tp_ret(evsel);
5018	evsel->handler = trace__sys_exit;
5019	}
5020	}
5021	}
5022
5023	if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
5024	return trace__record(trace: &trace, argc: argc-1, argv: &argv[1]);
5025
5026	/* Using just --errno-summary will trigger --summary */
5027	if (trace.errno_summary && !trace.summary && !trace.summary_only)
5028	trace.summary_only = true;
5029
5030	/* summary_only implies summary option, but don't overwrite summary if set */
5031	if (trace.summary_only)
5032	trace.summary = trace.summary_only;
5033
5034	if (output_name != NULL) {
5035	err = trace__open_output(trace: &trace, filename: output_name);
5036	if (err < 0) {
5037	perror("failed to create output file");
5038	goto out;
5039	}
5040	}
5041
5042	err = evswitch__init(&trace.evswitch, trace.evlist, stderr);
5043	if (err)
5044	goto out_close;
5045
5046	err = target__validate(&trace.opts.target);
5047	if (err) {
5048	target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5049	fprintf(trace.output, "%s", bf);
5050	goto out_close;
5051	}
5052
5053	err = target__parse_uid(&trace.opts.target);
5054	if (err) {
5055	target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5056	fprintf(trace.output, "%s", bf);
5057	goto out_close;
5058	}
5059
5060	if (!argc && target__none(&trace.opts.target))
5061	trace.opts.target.system_wide = true;
5062
5063	if (input_name)
5064	err = trace__replay(trace: &trace);
5065	else
5066	err = trace__run(trace: &trace, argc, argv);
5067
5068	out_close:
5069	if (output_name != NULL)
5070	fclose(trace.output);
5071	out:
5072	trace__exit(trace: &trace);
5073	#ifdef HAVE_BPF_SKEL
5074	augmented_raw_syscalls_bpf__destroy(trace.skel);
5075	#endif
5076	return err;
5077	}
5078