xref: /linux/tools/perf/builtin-trace.c (revision 14b7d43c5c068cb9688a9fe68883f4340effb053)
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 #include <bpf/btf.h>
23 #ifdef HAVE_BPF_SKEL
24 #include "bpf_skel/augmented_raw_syscalls.skel.h"
25 #endif
26 #endif
27 #include "util/bpf_map.h"
28 #include "util/rlimit.h"
29 #include "builtin.h"
30 #include "util/cgroup.h"
31 #include "util/color.h"
32 #include "util/config.h"
33 #include "util/debug.h"
34 #include "util/dso.h"
35 #include "util/env.h"
36 #include "util/event.h"
37 #include "util/evsel.h"
38 #include "util/evsel_fprintf.h"
39 #include "util/synthetic-events.h"
40 #include "util/evlist.h"
41 #include "util/evswitch.h"
42 #include "util/mmap.h"
43 #include <subcmd/pager.h>
44 #include <subcmd/exec-cmd.h>
45 #include "util/machine.h"
46 #include "util/map.h"
47 #include "util/symbol.h"
48 #include "util/path.h"
49 #include "util/session.h"
50 #include "util/thread.h"
51 #include <subcmd/parse-options.h>
52 #include "util/strlist.h"
53 #include "util/intlist.h"
54 #include "util/thread_map.h"
55 #include "util/stat.h"
56 #include "util/tool.h"
57 #include "util/util.h"
58 #include "trace/beauty/beauty.h"
59 #include "trace-event.h"
60 #include "util/parse-events.h"
61 #include "util/tracepoint.h"
62 #include "callchain.h"
63 #include "print_binary.h"
64 #include "string2.h"
65 #include "syscalltbl.h"
66 #include "rb_resort.h"
67 #include "../perf.h"
68 #include "trace_augment.h"
69 
70 #include <errno.h>
71 #include <inttypes.h>
72 #include <poll.h>
73 #include <signal.h>
74 #include <stdlib.h>
75 #include <string.h>
76 #include <linux/err.h>
77 #include <linux/filter.h>
78 #include <linux/kernel.h>
79 #include <linux/list_sort.h>
80 #include <linux/random.h>
81 #include <linux/stringify.h>
82 #include <linux/time64.h>
83 #include <linux/zalloc.h>
84 #include <fcntl.h>
85 #include <sys/sysmacros.h>
86 
87 #include <linux/ctype.h>
88 #include <perf/mmap.h>
89 
90 #ifdef HAVE_LIBTRACEEVENT
91 #include <traceevent/event-parse.h>
92 #endif
93 
94 #ifndef O_CLOEXEC
95 # define O_CLOEXEC		02000000
96 #endif
97 
98 #ifndef F_LINUX_SPECIFIC_BASE
99 # define F_LINUX_SPECIFIC_BASE	1024
100 #endif
101 
102 #define RAW_SYSCALL_ARGS_NUM	6
103 
104 /*
105  * strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100
106  *
107  * We have to explicitely mark the direction of the flow of data, if from the
108  * kernel to user space or the other way around, since the BPF collector we
109  * have so far copies only from user to kernel space, mark the arguments that
110  * go that direction, so that we don´t end up collecting the previous contents
111  * for syscall args that goes from kernel to user space.
112  */
113 struct syscall_arg_fmt {
114 	size_t	   (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
115 	bool	   (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val);
116 	unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val);
117 	void	   *parm;
118 	const char *name;
119 	u16	   nr_entries; // for arrays
120 	bool	   from_user;
121 	bool	   show_zero;
122 #ifdef HAVE_LIBBPF_SUPPORT
123 	const struct btf_type *type;
124 	int	   type_id; /* used in btf_dump */
125 #endif
126 };
127 
128 struct syscall_fmt {
129 	const char *name;
130 	const char *alias;
131 	struct {
132 		const char *sys_enter,
133 			   *sys_exit;
134 	}	   bpf_prog_name;
135 	struct syscall_arg_fmt arg[RAW_SYSCALL_ARGS_NUM];
136 	u8	   nr_args;
137 	bool	   errpid;
138 	bool	   timeout;
139 	bool	   hexret;
140 };
141 
142 struct trace {
143 	struct perf_tool	tool;
144 	struct syscalltbl	*sctbl;
145 	struct {
146 		struct syscall  *table;
147 		struct {
148 			struct evsel *sys_enter,
149 				*sys_exit,
150 				*bpf_output;
151 		}		events;
152 	} syscalls;
153 #ifdef HAVE_BPF_SKEL
154 	struct augmented_raw_syscalls_bpf *skel;
155 #endif
156 #ifdef HAVE_LIBBPF_SUPPORT
157 	struct btf		*btf;
158 #endif
159 	struct record_opts	opts;
160 	struct evlist	*evlist;
161 	struct machine		*host;
162 	struct thread		*current;
163 	struct cgroup		*cgroup;
164 	u64			base_time;
165 	FILE			*output;
166 	unsigned long		nr_events;
167 	unsigned long		nr_events_printed;
168 	unsigned long		max_events;
169 	struct evswitch		evswitch;
170 	struct strlist		*ev_qualifier;
171 	struct {
172 		size_t		nr;
173 		int		*entries;
174 	}			ev_qualifier_ids;
175 	struct {
176 		size_t		nr;
177 		pid_t		*entries;
178 		struct bpf_map  *map;
179 	}			filter_pids;
180 	double			duration_filter;
181 	double			runtime_ms;
182 	struct {
183 		u64		vfs_getname,
184 				proc_getname;
185 	} stats;
186 	unsigned int		max_stack;
187 	unsigned int		min_stack;
188 	int			raw_augmented_syscalls_args_size;
189 	bool			raw_augmented_syscalls;
190 	bool			fd_path_disabled;
191 	bool			sort_events;
192 	bool			not_ev_qualifier;
193 	bool			live;
194 	bool			full_time;
195 	bool			sched;
196 	bool			multiple_threads;
197 	bool			summary;
198 	bool			summary_only;
199 	bool			errno_summary;
200 	bool			failure_only;
201 	bool			show_comm;
202 	bool			print_sample;
203 	bool			show_tool_stats;
204 	bool			trace_syscalls;
205 	bool			libtraceevent_print;
206 	bool			kernel_syscallchains;
207 	s16			args_alignment;
208 	bool			show_tstamp;
209 	bool			show_duration;
210 	bool			show_zeros;
211 	bool			show_arg_names;
212 	bool			show_string_prefix;
213 	bool			force;
214 	bool			vfs_getname;
215 	bool			force_btf;
216 	int			trace_pgfaults;
217 	char			*perfconfig_events;
218 	struct {
219 		struct ordered_events	data;
220 		u64			last;
221 	} oe;
222 };
223 
trace__load_vmlinux_btf(struct trace * trace __maybe_unused)224 static void trace__load_vmlinux_btf(struct trace *trace __maybe_unused)
225 {
226 #ifdef HAVE_LIBBPF_SUPPORT
227 	if (trace->btf != NULL)
228 		return;
229 
230 	trace->btf = btf__load_vmlinux_btf();
231 	if (verbose > 0) {
232 		fprintf(trace->output, trace->btf ? "vmlinux BTF loaded\n" :
233 						    "Failed to load vmlinux BTF\n");
234 	}
235 #endif
236 }
237 
238 struct tp_field {
239 	int offset;
240 	union {
241 		u64 (*integer)(struct tp_field *field, struct perf_sample *sample);
242 		void *(*pointer)(struct tp_field *field, struct perf_sample *sample);
243 	};
244 };
245 
246 #define TP_UINT_FIELD(bits) \
247 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \
248 { \
249 	u##bits value; \
250 	memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
251 	return value;  \
252 }
253 
254 TP_UINT_FIELD(8);
255 TP_UINT_FIELD(16);
256 TP_UINT_FIELD(32);
257 TP_UINT_FIELD(64);
258 
259 #define TP_UINT_FIELD__SWAPPED(bits) \
260 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \
261 { \
262 	u##bits value; \
263 	memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \
264 	return bswap_##bits(value);\
265 }
266 
267 TP_UINT_FIELD__SWAPPED(16);
268 TP_UINT_FIELD__SWAPPED(32);
269 TP_UINT_FIELD__SWAPPED(64);
270 
__tp_field__init_uint(struct tp_field * field,int size,int offset,bool needs_swap)271 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap)
272 {
273 	field->offset = offset;
274 
275 	switch (size) {
276 	case 1:
277 		field->integer = tp_field__u8;
278 		break;
279 	case 2:
280 		field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16;
281 		break;
282 	case 4:
283 		field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32;
284 		break;
285 	case 8:
286 		field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64;
287 		break;
288 	default:
289 		return -1;
290 	}
291 
292 	return 0;
293 }
294 
tp_field__init_uint(struct tp_field * field,struct tep_format_field * format_field,bool needs_swap)295 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap)
296 {
297 	return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap);
298 }
299 
tp_field__ptr(struct tp_field * field,struct perf_sample * sample)300 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample)
301 {
302 	return sample->raw_data + field->offset;
303 }
304 
__tp_field__init_ptr(struct tp_field * field,int offset)305 static int __tp_field__init_ptr(struct tp_field *field, int offset)
306 {
307 	field->offset = offset;
308 	field->pointer = tp_field__ptr;
309 	return 0;
310 }
311 
tp_field__init_ptr(struct tp_field * field,struct tep_format_field * format_field)312 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field)
313 {
314 	return __tp_field__init_ptr(field, format_field->offset);
315 }
316 
317 struct syscall_tp {
318 	struct tp_field id;
319 	union {
320 		struct tp_field args, ret;
321 	};
322 };
323 
324 /*
325  * The evsel->priv as used by 'perf trace'
326  * sc:	for raw_syscalls:sys_{enter,exit} and syscalls:sys_{enter,exit}_SYSCALLNAME
327  * fmt: for all the other tracepoints
328  */
329 struct evsel_trace {
330 	struct syscall_tp	sc;
331 	struct syscall_arg_fmt  *fmt;
332 };
333 
evsel_trace__new(void)334 static struct evsel_trace *evsel_trace__new(void)
335 {
336 	return zalloc(sizeof(struct evsel_trace));
337 }
338 
evsel_trace__delete(struct evsel_trace * et)339 static void evsel_trace__delete(struct evsel_trace *et)
340 {
341 	if (et == NULL)
342 		return;
343 
344 	zfree(&et->fmt);
345 	free(et);
346 }
347 
348 /*
349  * Used with raw_syscalls:sys_{enter,exit} and with the
350  * syscalls:sys_{enter,exit}_SYSCALL tracepoints
351  */
__evsel__syscall_tp(struct evsel * evsel)352 static inline struct syscall_tp *__evsel__syscall_tp(struct evsel *evsel)
353 {
354 	struct evsel_trace *et = evsel->priv;
355 
356 	return &et->sc;
357 }
358 
evsel__syscall_tp(struct evsel * evsel)359 static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel)
360 {
361 	if (evsel->priv == NULL) {
362 		evsel->priv = evsel_trace__new();
363 		if (evsel->priv == NULL)
364 			return NULL;
365 	}
366 
367 	return __evsel__syscall_tp(evsel);
368 }
369 
370 /*
371  * Used with all the other tracepoints.
372  */
__evsel__syscall_arg_fmt(struct evsel * evsel)373 static inline struct syscall_arg_fmt *__evsel__syscall_arg_fmt(struct evsel *evsel)
374 {
375 	struct evsel_trace *et = evsel->priv;
376 
377 	return et->fmt;
378 }
379 
evsel__syscall_arg_fmt(struct evsel * evsel)380 static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel)
381 {
382 	struct evsel_trace *et = evsel->priv;
383 
384 	if (evsel->priv == NULL) {
385 		et = evsel->priv = evsel_trace__new();
386 
387 		if (et == NULL)
388 			return NULL;
389 	}
390 
391 	if (et->fmt == NULL) {
392 		et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt));
393 		if (et->fmt == NULL)
394 			goto out_delete;
395 	}
396 
397 	return __evsel__syscall_arg_fmt(evsel);
398 
399 out_delete:
400 	evsel_trace__delete(evsel->priv);
401 	evsel->priv = NULL;
402 	return NULL;
403 }
404 
evsel__init_tp_uint_field(struct evsel * evsel,struct tp_field * field,const char * name)405 static int evsel__init_tp_uint_field(struct evsel *evsel, struct tp_field *field, const char *name)
406 {
407 	struct tep_format_field *format_field = evsel__field(evsel, name);
408 
409 	if (format_field == NULL)
410 		return -1;
411 
412 	return tp_field__init_uint(field, format_field, evsel->needs_swap);
413 }
414 
415 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \
416 	({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
417 	   evsel__init_tp_uint_field(evsel, &sc->name, #name); })
418 
evsel__init_tp_ptr_field(struct evsel * evsel,struct tp_field * field,const char * name)419 static int evsel__init_tp_ptr_field(struct evsel *evsel, struct tp_field *field, const char *name)
420 {
421 	struct tep_format_field *format_field = evsel__field(evsel, name);
422 
423 	if (format_field == NULL)
424 		return -1;
425 
426 	return tp_field__init_ptr(field, format_field);
427 }
428 
429 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \
430 	({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\
431 	   evsel__init_tp_ptr_field(evsel, &sc->name, #name); })
432 
evsel__delete_priv(struct evsel * evsel)433 static void evsel__delete_priv(struct evsel *evsel)
434 {
435 	zfree(&evsel->priv);
436 	evsel__delete(evsel);
437 }
438 
evsel__init_syscall_tp(struct evsel * evsel)439 static int evsel__init_syscall_tp(struct evsel *evsel)
440 {
441 	struct syscall_tp *sc = evsel__syscall_tp(evsel);
442 
443 	if (sc != NULL) {
444 		if (evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") &&
445 		    evsel__init_tp_uint_field(evsel, &sc->id, "nr"))
446 			return -ENOENT;
447 
448 		return 0;
449 	}
450 
451 	return -ENOMEM;
452 }
453 
evsel__init_augmented_syscall_tp(struct evsel * evsel,struct evsel * tp)454 static int evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp)
455 {
456 	struct syscall_tp *sc = evsel__syscall_tp(evsel);
457 
458 	if (sc != NULL) {
459 		struct tep_format_field *syscall_id = evsel__field(tp, "id");
460 		if (syscall_id == NULL)
461 			syscall_id = evsel__field(tp, "__syscall_nr");
462 		if (syscall_id == NULL ||
463 		    __tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap))
464 			return -EINVAL;
465 
466 		return 0;
467 	}
468 
469 	return -ENOMEM;
470 }
471 
evsel__init_augmented_syscall_tp_args(struct evsel * evsel)472 static int evsel__init_augmented_syscall_tp_args(struct evsel *evsel)
473 {
474 	struct syscall_tp *sc = __evsel__syscall_tp(evsel);
475 
476 	return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64));
477 }
478 
evsel__init_augmented_syscall_tp_ret(struct evsel * evsel)479 static int evsel__init_augmented_syscall_tp_ret(struct evsel *evsel)
480 {
481 	struct syscall_tp *sc = __evsel__syscall_tp(evsel);
482 
483 	return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap);
484 }
485 
evsel__init_raw_syscall_tp(struct evsel * evsel,void * handler)486 static int evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler)
487 {
488 	if (evsel__syscall_tp(evsel) != NULL) {
489 		if (perf_evsel__init_sc_tp_uint_field(evsel, id))
490 			return -ENOENT;
491 
492 		evsel->handler = handler;
493 		return 0;
494 	}
495 
496 	return -ENOMEM;
497 }
498 
perf_evsel__raw_syscall_newtp(const char * direction,void * handler)499 static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler)
500 {
501 	struct evsel *evsel = evsel__newtp("raw_syscalls", direction);
502 
503 	/* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */
504 	if (IS_ERR(evsel))
505 		evsel = evsel__newtp("syscalls", direction);
506 
507 	if (IS_ERR(evsel))
508 		return NULL;
509 
510 	if (evsel__init_raw_syscall_tp(evsel, handler))
511 		goto out_delete;
512 
513 	return evsel;
514 
515 out_delete:
516 	evsel__delete_priv(evsel);
517 	return NULL;
518 }
519 
520 #define perf_evsel__sc_tp_uint(evsel, name, sample) \
521 	({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
522 	   fields->name.integer(&fields->name, sample); })
523 
524 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \
525 	({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \
526 	   fields->name.pointer(&fields->name, sample); })
527 
strarray__scnprintf_suffix(struct strarray * sa,char * bf,size_t size,const char * intfmt,bool show_suffix,int val)528 size_t strarray__scnprintf_suffix(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_suffix, int val)
529 {
530 	int idx = val - sa->offset;
531 
532 	if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
533 		size_t printed = scnprintf(bf, size, intfmt, val);
534 		if (show_suffix)
535 			printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
536 		return printed;
537 	}
538 
539 	return scnprintf(bf, size, "%s%s", sa->entries[idx], show_suffix ? sa->prefix : "");
540 }
541 
strarray__scnprintf(struct strarray * sa,char * bf,size_t size,const char * intfmt,bool show_prefix,int val)542 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
543 {
544 	int idx = val - sa->offset;
545 
546 	if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) {
547 		size_t printed = scnprintf(bf, size, intfmt, val);
548 		if (show_prefix)
549 			printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix);
550 		return printed;
551 	}
552 
553 	return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
554 }
555 
__syscall_arg__scnprintf_strarray(char * bf,size_t size,const char * intfmt,struct syscall_arg * arg)556 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size,
557 						const char *intfmt,
558 					        struct syscall_arg *arg)
559 {
560 	return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val);
561 }
562 
syscall_arg__scnprintf_strarray(char * bf,size_t size,struct syscall_arg * arg)563 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size,
564 					      struct syscall_arg *arg)
565 {
566 	return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg);
567 }
568 
569 #define SCA_STRARRAY syscall_arg__scnprintf_strarray
570 
syscall_arg__strtoul_strarray(char * bf,size_t size,struct syscall_arg * arg,u64 * ret)571 bool syscall_arg__strtoul_strarray(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
572 {
573 	return strarray__strtoul(arg->parm, bf, size, ret);
574 }
575 
syscall_arg__strtoul_strarray_flags(char * bf,size_t size,struct syscall_arg * arg,u64 * ret)576 bool syscall_arg__strtoul_strarray_flags(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
577 {
578 	return strarray__strtoul_flags(arg->parm, bf, size, ret);
579 }
580 
syscall_arg__strtoul_strarrays(char * bf,size_t size,struct syscall_arg * arg,u64 * ret)581 bool syscall_arg__strtoul_strarrays(char *bf, size_t size, struct syscall_arg *arg, u64 *ret)
582 {
583 	return strarrays__strtoul(arg->parm, bf, size, ret);
584 }
585 
syscall_arg__scnprintf_strarray_flags(char * bf,size_t size,struct syscall_arg * arg)586 size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg)
587 {
588 	return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val);
589 }
590 
strarrays__scnprintf(struct strarrays * sas,char * bf,size_t size,const char * intfmt,bool show_prefix,int val)591 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val)
592 {
593 	size_t printed;
594 	int i;
595 
596 	for (i = 0; i < sas->nr_entries; ++i) {
597 		struct strarray *sa = sas->entries[i];
598 		int idx = val - sa->offset;
599 
600 		if (idx >= 0 && idx < sa->nr_entries) {
601 			if (sa->entries[idx] == NULL)
602 				break;
603 			return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]);
604 		}
605 	}
606 
607 	printed = scnprintf(bf, size, intfmt, val);
608 	if (show_prefix)
609 		printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix);
610 	return printed;
611 }
612 
strarray__strtoul(struct strarray * sa,char * bf,size_t size,u64 * ret)613 bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret)
614 {
615 	int i;
616 
617 	for (i = 0; i < sa->nr_entries; ++i) {
618 		if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') {
619 			*ret = sa->offset + i;
620 			return true;
621 		}
622 	}
623 
624 	return false;
625 }
626 
strarray__strtoul_flags(struct strarray * sa,char * bf,size_t size,u64 * ret)627 bool strarray__strtoul_flags(struct strarray *sa, char *bf, size_t size, u64 *ret)
628 {
629 	u64 val = 0;
630 	char *tok = bf, *sep, *end;
631 
632 	*ret = 0;
633 
634 	while (size != 0) {
635 		int toklen = size;
636 
637 		sep = memchr(tok, '|', size);
638 		if (sep != NULL) {
639 			size -= sep - tok + 1;
640 
641 			end = sep - 1;
642 			while (end > tok && isspace(*end))
643 				--end;
644 
645 			toklen = end - tok + 1;
646 		}
647 
648 		while (isspace(*tok))
649 			++tok;
650 
651 		if (isalpha(*tok) || *tok == '_') {
652 			if (!strarray__strtoul(sa, tok, toklen, &val))
653 				return false;
654 		} else
655 			val = strtoul(tok, NULL, 0);
656 
657 		*ret |= (1 << (val - 1));
658 
659 		if (sep == NULL)
660 			break;
661 		tok = sep + 1;
662 	}
663 
664 	return true;
665 }
666 
strarrays__strtoul(struct strarrays * sas,char * bf,size_t size,u64 * ret)667 bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret)
668 {
669 	int i;
670 
671 	for (i = 0; i < sas->nr_entries; ++i) {
672 		struct strarray *sa = sas->entries[i];
673 
674 		if (strarray__strtoul(sa, bf, size, ret))
675 			return true;
676 	}
677 
678 	return false;
679 }
680 
syscall_arg__scnprintf_strarrays(char * bf,size_t size,struct syscall_arg * arg)681 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size,
682 					struct syscall_arg *arg)
683 {
684 	return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val);
685 }
686 
687 #ifndef AT_FDCWD
688 #define AT_FDCWD	-100
689 #endif
690 
syscall_arg__scnprintf_fd_at(char * bf,size_t size,struct syscall_arg * arg)691 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size,
692 					   struct syscall_arg *arg)
693 {
694 	int fd = arg->val;
695 	const char *prefix = "AT_FD";
696 
697 	if (fd == AT_FDCWD)
698 		return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD");
699 
700 	return syscall_arg__scnprintf_fd(bf, size, arg);
701 }
702 
703 #define SCA_FDAT syscall_arg__scnprintf_fd_at
704 
705 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
706 					      struct syscall_arg *arg);
707 
708 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd
709 
syscall_arg__scnprintf_hex(char * bf,size_t size,struct syscall_arg * arg)710 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg)
711 {
712 	return scnprintf(bf, size, "%#lx", arg->val);
713 }
714 
syscall_arg__scnprintf_ptr(char * bf,size_t size,struct syscall_arg * arg)715 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg)
716 {
717 	if (arg->val == 0)
718 		return scnprintf(bf, size, "NULL");
719 	return syscall_arg__scnprintf_hex(bf, size, arg);
720 }
721 
syscall_arg__scnprintf_int(char * bf,size_t size,struct syscall_arg * arg)722 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg)
723 {
724 	return scnprintf(bf, size, "%d", arg->val);
725 }
726 
syscall_arg__scnprintf_long(char * bf,size_t size,struct syscall_arg * arg)727 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg)
728 {
729 	return scnprintf(bf, size, "%ld", arg->val);
730 }
731 
syscall_arg__scnprintf_char_array(char * bf,size_t size,struct syscall_arg * arg)732 static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg)
733 {
734 	// XXX Hey, maybe for sched:sched_switch prev/next comm fields we can
735 	//     fill missing comms using thread__set_comm()...
736 	//     here or in a special syscall_arg__scnprintf_pid_sched_tp...
737 	return scnprintf(bf, size, "\"%-.*s\"", arg->fmt->nr_entries ?: arg->len, arg->val);
738 }
739 
740 #define SCA_CHAR_ARRAY syscall_arg__scnprintf_char_array
741 
742 static const char *bpf_cmd[] = {
743 	"MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM",
744 	"MAP_GET_NEXT_KEY", "PROG_LOAD", "OBJ_PIN", "OBJ_GET", "PROG_ATTACH",
745 	"PROG_DETACH", "PROG_TEST_RUN", "PROG_GET_NEXT_ID", "MAP_GET_NEXT_ID",
746 	"PROG_GET_FD_BY_ID", "MAP_GET_FD_BY_ID", "OBJ_GET_INFO_BY_FD",
747 	"PROG_QUERY", "RAW_TRACEPOINT_OPEN", "BTF_LOAD", "BTF_GET_FD_BY_ID",
748 	"TASK_FD_QUERY", "MAP_LOOKUP_AND_DELETE_ELEM", "MAP_FREEZE",
749 	"BTF_GET_NEXT_ID", "MAP_LOOKUP_BATCH", "MAP_LOOKUP_AND_DELETE_BATCH",
750 	"MAP_UPDATE_BATCH", "MAP_DELETE_BATCH", "LINK_CREATE", "LINK_UPDATE",
751 	"LINK_GET_FD_BY_ID", "LINK_GET_NEXT_ID", "ENABLE_STATS", "ITER_CREATE",
752 	"LINK_DETACH", "PROG_BIND_MAP",
753 };
754 static DEFINE_STRARRAY(bpf_cmd, "BPF_");
755 
756 static const char *fsmount_flags[] = {
757 	[1] = "CLOEXEC",
758 };
759 static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_");
760 
761 #include "trace/beauty/generated/fsconfig_arrays.c"
762 
763 static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_");
764 
765 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", };
766 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1);
767 
768 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", };
769 static DEFINE_STRARRAY(itimers, "ITIMER_");
770 
771 static const char *keyctl_options[] = {
772 	"GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN",
773 	"SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ",
774 	"INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT",
775 	"ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT",
776 	"INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT",
777 };
778 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_");
779 
780 static const char *whences[] = { "SET", "CUR", "END",
781 #ifdef SEEK_DATA
782 "DATA",
783 #endif
784 #ifdef SEEK_HOLE
785 "HOLE",
786 #endif
787 };
788 static DEFINE_STRARRAY(whences, "SEEK_");
789 
790 static const char *fcntl_cmds[] = {
791 	"DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK",
792 	"SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64",
793 	"SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX",
794 	"GETOWNER_UIDS",
795 };
796 static DEFINE_STRARRAY(fcntl_cmds, "F_");
797 
798 static const char *fcntl_linux_specific_cmds[] = {
799 	"SETLEASE", "GETLEASE", "NOTIFY", "DUPFD_QUERY", [5] = "CANCELLK", "DUPFD_CLOEXEC",
800 	"SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS",
801 	"GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT",
802 };
803 
804 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE);
805 
806 static struct strarray *fcntl_cmds_arrays[] = {
807 	&strarray__fcntl_cmds,
808 	&strarray__fcntl_linux_specific_cmds,
809 };
810 
811 static DEFINE_STRARRAYS(fcntl_cmds_arrays);
812 
813 static const char *rlimit_resources[] = {
814 	"CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE",
815 	"MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO",
816 	"RTTIME",
817 };
818 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_");
819 
820 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", };
821 static DEFINE_STRARRAY(sighow, "SIG_");
822 
823 static const char *clockid[] = {
824 	"REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID",
825 	"MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME",
826 	"REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI"
827 };
828 static DEFINE_STRARRAY(clockid, "CLOCK_");
829 
syscall_arg__scnprintf_access_mode(char * bf,size_t size,struct syscall_arg * arg)830 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size,
831 						 struct syscall_arg *arg)
832 {
833 	bool show_prefix = arg->show_string_prefix;
834 	const char *suffix = "_OK";
835 	size_t printed = 0;
836 	int mode = arg->val;
837 
838 	if (mode == F_OK) /* 0 */
839 		return scnprintf(bf, size, "F%s", show_prefix ? suffix : "");
840 #define	P_MODE(n) \
841 	if (mode & n##_OK) { \
842 		printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \
843 		mode &= ~n##_OK; \
844 	}
845 
846 	P_MODE(R);
847 	P_MODE(W);
848 	P_MODE(X);
849 #undef P_MODE
850 
851 	if (mode)
852 		printed += scnprintf(bf + printed, size - printed, "|%#x", mode);
853 
854 	return printed;
855 }
856 
857 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode
858 
859 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
860 					      struct syscall_arg *arg);
861 
862 #define SCA_FILENAME syscall_arg__scnprintf_filename
863 
864 // 'argname' is just documentational at this point, to remove the previous comment with that info
865 #define SCA_FILENAME_FROM_USER(argname) \
866 	  { .scnprintf	= SCA_FILENAME, \
867 	    .from_user	= true, }
868 
869 static size_t syscall_arg__scnprintf_buf(char *bf, size_t size, struct syscall_arg *arg);
870 
871 #define SCA_BUF syscall_arg__scnprintf_buf
872 
syscall_arg__scnprintf_pipe_flags(char * bf,size_t size,struct syscall_arg * arg)873 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size,
874 						struct syscall_arg *arg)
875 {
876 	bool show_prefix = arg->show_string_prefix;
877 	const char *prefix = "O_";
878 	int printed = 0, flags = arg->val;
879 
880 #define	P_FLAG(n) \
881 	if (flags & O_##n) { \
882 		printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
883 		flags &= ~O_##n; \
884 	}
885 
886 	P_FLAG(CLOEXEC);
887 	P_FLAG(NONBLOCK);
888 #undef P_FLAG
889 
890 	if (flags)
891 		printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
892 
893 	return printed;
894 }
895 
896 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags
897 
898 #ifndef GRND_NONBLOCK
899 #define GRND_NONBLOCK	0x0001
900 #endif
901 #ifndef GRND_RANDOM
902 #define GRND_RANDOM	0x0002
903 #endif
904 
syscall_arg__scnprintf_getrandom_flags(char * bf,size_t size,struct syscall_arg * arg)905 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
906 						   struct syscall_arg *arg)
907 {
908 	bool show_prefix = arg->show_string_prefix;
909 	const char *prefix = "GRND_";
910 	int printed = 0, flags = arg->val;
911 
912 #define	P_FLAG(n) \
913 	if (flags & GRND_##n) { \
914 		printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
915 		flags &= ~GRND_##n; \
916 	}
917 
918 	P_FLAG(RANDOM);
919 	P_FLAG(NONBLOCK);
920 #undef P_FLAG
921 
922 	if (flags)
923 		printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
924 
925 	return printed;
926 }
927 
928 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags
929 
930 #ifdef HAVE_LIBBPF_SUPPORT
syscall_arg_fmt__cache_btf_enum(struct syscall_arg_fmt * arg_fmt,struct btf * btf,char * type)931 static void syscall_arg_fmt__cache_btf_enum(struct syscall_arg_fmt *arg_fmt, struct btf *btf, char *type)
932 {
933 	int id;
934 
935 	type = strstr(type, "enum ");
936 	if (type == NULL)
937 		return;
938 
939 	type += 5; // skip "enum " to get the enumeration name
940 
941 	id = btf__find_by_name(btf, type);
942 	if (id < 0)
943 		return;
944 
945 	arg_fmt->type = btf__type_by_id(btf, id);
946 }
947 
syscall_arg__strtoul_btf_enum(char * bf,size_t size,struct syscall_arg * arg,u64 * val)948 static bool syscall_arg__strtoul_btf_enum(char *bf, size_t size, struct syscall_arg *arg, u64 *val)
949 {
950 	const struct btf_type *bt = arg->fmt->type;
951 	struct btf *btf = arg->trace->btf;
952 	struct btf_enum *be = btf_enum(bt);
953 
954 	for (int i = 0; i < btf_vlen(bt); ++i, ++be) {
955 		const char *name = btf__name_by_offset(btf, be->name_off);
956 		int max_len = max(size, strlen(name));
957 
958 		if (strncmp(name, bf, max_len) == 0) {
959 			*val = be->val;
960 			return true;
961 		}
962 	}
963 
964 	return false;
965 }
966 
syscall_arg__strtoul_btf_type(char * bf,size_t size,struct syscall_arg * arg,u64 * val)967 static bool syscall_arg__strtoul_btf_type(char *bf, size_t size, struct syscall_arg *arg, u64 *val)
968 {
969 	const struct btf_type *bt;
970 	char *type = arg->type_name;
971 	struct btf *btf;
972 
973 	trace__load_vmlinux_btf(arg->trace);
974 
975 	btf = arg->trace->btf;
976 	if (btf == NULL)
977 		return false;
978 
979 	if (arg->fmt->type == NULL) {
980 		// See if this is an enum
981 		syscall_arg_fmt__cache_btf_enum(arg->fmt, btf, type);
982 	}
983 
984 	// Now let's see if we have a BTF type resolved
985 	bt = arg->fmt->type;
986 	if (bt == NULL)
987 		return false;
988 
989 	// If it is an enum:
990 	if (btf_is_enum(arg->fmt->type))
991 		return syscall_arg__strtoul_btf_enum(bf, size, arg, val);
992 
993 	return false;
994 }
995 
btf_enum_scnprintf(const struct btf_type * type,struct btf * btf,char * bf,size_t size,int val)996 static size_t btf_enum_scnprintf(const struct btf_type *type, struct btf *btf, char *bf, size_t size, int val)
997 {
998 	struct btf_enum *be = btf_enum(type);
999 	const int nr_entries = btf_vlen(type);
1000 
1001 	for (int i = 0; i < nr_entries; ++i, ++be) {
1002 		if (be->val == val) {
1003 			return scnprintf(bf, size, "%s",
1004 					 btf__name_by_offset(btf, be->name_off));
1005 		}
1006 	}
1007 
1008 	return 0;
1009 }
1010 
1011 struct trace_btf_dump_snprintf_ctx {
1012 	char   *bf;
1013 	size_t printed, size;
1014 };
1015 
trace__btf_dump_snprintf(void * vctx,const char * fmt,va_list args)1016 static void trace__btf_dump_snprintf(void *vctx, const char *fmt, va_list args)
1017 {
1018 	struct trace_btf_dump_snprintf_ctx *ctx = vctx;
1019 
1020 	ctx->printed += vscnprintf(ctx->bf + ctx->printed, ctx->size - ctx->printed, fmt, args);
1021 }
1022 
btf_struct_scnprintf(const struct btf_type * type,struct btf * btf,char * bf,size_t size,struct syscall_arg * arg)1023 static size_t btf_struct_scnprintf(const struct btf_type *type, struct btf *btf, char *bf, size_t size, struct syscall_arg *arg)
1024 {
1025 	struct trace_btf_dump_snprintf_ctx ctx = {
1026 		.bf   = bf,
1027 		.size = size,
1028 	};
1029 	struct augmented_arg *augmented_arg = arg->augmented.args;
1030 	int type_id = arg->fmt->type_id, consumed;
1031 	struct btf_dump *btf_dump;
1032 
1033 	LIBBPF_OPTS(btf_dump_opts, dump_opts);
1034 	LIBBPF_OPTS(btf_dump_type_data_opts, dump_data_opts);
1035 
1036 	if (arg == NULL || arg->augmented.args == NULL)
1037 		return 0;
1038 
1039 	dump_data_opts.compact	  = true;
1040 	dump_data_opts.skip_names = !arg->trace->show_arg_names;
1041 
1042 	btf_dump = btf_dump__new(btf, trace__btf_dump_snprintf, &ctx, &dump_opts);
1043 	if (btf_dump == NULL)
1044 		return 0;
1045 
1046 	/* pretty print the struct data here */
1047 	if (btf_dump__dump_type_data(btf_dump, type_id, arg->augmented.args->value, type->size, &dump_data_opts) == 0)
1048 		return 0;
1049 
1050 	consumed = sizeof(*augmented_arg) + augmented_arg->size;
1051 	arg->augmented.args = ((void *)arg->augmented.args) + consumed;
1052 	arg->augmented.size -= consumed;
1053 
1054 	btf_dump__free(btf_dump);
1055 
1056 	return ctx.printed;
1057 }
1058 
trace__btf_scnprintf(struct trace * trace,struct syscall_arg * arg,char * bf,size_t size,int val,char * type)1059 static size_t trace__btf_scnprintf(struct trace *trace, struct syscall_arg *arg, char *bf,
1060 				   size_t size, int val, char *type)
1061 {
1062 	struct syscall_arg_fmt *arg_fmt = arg->fmt;
1063 
1064 	if (trace->btf == NULL)
1065 		return 0;
1066 
1067 	if (arg_fmt->type == NULL) {
1068 		// Check if this is an enum and if we have the BTF type for it.
1069 		syscall_arg_fmt__cache_btf_enum(arg_fmt, trace->btf, type);
1070 	}
1071 
1072 	// Did we manage to find a BTF type for the syscall/tracepoint argument?
1073 	if (arg_fmt->type == NULL)
1074 		return 0;
1075 
1076 	if (btf_is_enum(arg_fmt->type))
1077 		return btf_enum_scnprintf(arg_fmt->type, trace->btf, bf, size, val);
1078 	else if (btf_is_struct(arg_fmt->type) || btf_is_union(arg_fmt->type))
1079 		return btf_struct_scnprintf(arg_fmt->type, trace->btf, bf, size, arg);
1080 
1081 	return 0;
1082 }
1083 
1084 #else // HAVE_LIBBPF_SUPPORT
trace__btf_scnprintf(struct trace * trace __maybe_unused,struct syscall_arg * arg __maybe_unused,char * bf __maybe_unused,size_t size __maybe_unused,int val __maybe_unused,char * type __maybe_unused)1085 static size_t trace__btf_scnprintf(struct trace *trace __maybe_unused, struct syscall_arg *arg __maybe_unused,
1086 				   char *bf __maybe_unused, size_t size __maybe_unused, int val __maybe_unused,
1087 				   char *type __maybe_unused)
1088 {
1089 	return 0;
1090 }
1091 
syscall_arg__strtoul_btf_type(char * bf __maybe_unused,size_t size __maybe_unused,struct syscall_arg * arg __maybe_unused,u64 * val __maybe_unused)1092 static bool syscall_arg__strtoul_btf_type(char *bf __maybe_unused, size_t size __maybe_unused,
1093 					  struct syscall_arg *arg __maybe_unused, u64 *val __maybe_unused)
1094 {
1095 	return false;
1096 }
1097 #endif // HAVE_LIBBPF_SUPPORT
1098 
1099 #define STUL_BTF_TYPE syscall_arg__strtoul_btf_type
1100 
1101 #define STRARRAY(name, array) \
1102 	  { .scnprintf	= SCA_STRARRAY, \
1103 	    .strtoul	= STUL_STRARRAY, \
1104 	    .parm	= &strarray__##array, }
1105 
1106 #define STRARRAY_FLAGS(name, array) \
1107 	  { .scnprintf	= SCA_STRARRAY_FLAGS, \
1108 	    .strtoul	= STUL_STRARRAY_FLAGS, \
1109 	    .parm	= &strarray__##array, }
1110 
1111 #include "trace/beauty/arch_errno_names.c"
1112 #include "trace/beauty/eventfd.c"
1113 #include "trace/beauty/futex_op.c"
1114 #include "trace/beauty/futex_val3.c"
1115 #include "trace/beauty/mmap.c"
1116 #include "trace/beauty/mode_t.c"
1117 #include "trace/beauty/msg_flags.c"
1118 #include "trace/beauty/open_flags.c"
1119 #include "trace/beauty/perf_event_open.c"
1120 #include "trace/beauty/pid.c"
1121 #include "trace/beauty/sched_policy.c"
1122 #include "trace/beauty/seccomp.c"
1123 #include "trace/beauty/signum.c"
1124 #include "trace/beauty/socket_type.c"
1125 #include "trace/beauty/waitid_options.c"
1126 
1127 static const struct syscall_fmt syscall_fmts[] = {
1128 	{ .name	    = "access",
1129 	  .arg = { [1] = { .scnprintf = SCA_ACCMODE,  /* mode */ }, }, },
1130 	{ .name	    = "arch_prctl",
1131 	  .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ },
1132 		   [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, },
1133 	{ .name	    = "bind",
1134 	  .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
1135 		   [1] = SCA_SOCKADDR_FROM_USER(umyaddr),
1136 		   [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
1137 	{ .name	    = "bpf",
1138 	  .arg = { [0] = STRARRAY(cmd, bpf_cmd),
1139 		   [1] = { .from_user = true /* attr */, }, } },
1140 	{ .name	    = "brk",	    .hexret = true,
1141 	  .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, },
1142 	{ .name     = "clock_gettime",
1143 	  .arg = { [0] = STRARRAY(clk_id, clockid), }, },
1144 	{ .name	    = "clock_nanosleep",
1145 	  .arg = { [2] = SCA_TIMESPEC_FROM_USER(req), }, },
1146 	{ .name	    = "clone",	    .errpid = true, .nr_args = 5,
1147 	  .arg = { [0] = { .name = "flags",	    .scnprintf = SCA_CLONE_FLAGS, },
1148 		   [1] = { .name = "child_stack",   .scnprintf = SCA_HEX, },
1149 		   [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, },
1150 		   [3] = { .name = "child_tidptr",  .scnprintf = SCA_HEX, },
1151 		   [4] = { .name = "tls",	    .scnprintf = SCA_HEX, }, }, },
1152 	{ .name	    = "close",
1153 	  .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, },
1154 	{ .name	    = "connect",
1155 	  .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ },
1156 		   [1] = SCA_SOCKADDR_FROM_USER(servaddr),
1157 		   [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, },
1158 	{ .name	    = "epoll_ctl",
1159 	  .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, },
1160 	{ .name	    = "eventfd2",
1161 	  .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, },
1162 	{ .name     = "faccessat",
1163 	  .arg = { [0] = { .scnprintf = SCA_FDAT,	  /* dirfd */ },
1164 		   [1] = SCA_FILENAME_FROM_USER(pathname),
1165 		   [2] = { .scnprintf = SCA_ACCMODE,	  /* mode */ }, }, },
1166 	{ .name     = "faccessat2",
1167 	  .arg = { [0] = { .scnprintf = SCA_FDAT,	  /* dirfd */ },
1168 		   [1] = SCA_FILENAME_FROM_USER(pathname),
1169 		   [2] = { .scnprintf = SCA_ACCMODE,	  /* mode */ },
1170 		   [3] = { .scnprintf = SCA_FACCESSAT2_FLAGS, /* flags */ }, }, },
1171 	{ .name	    = "fchmodat",
1172 	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1173 	{ .name	    = "fchownat",
1174 	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1175 	{ .name	    = "fcntl",
1176 	  .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD,  /* cmd */
1177 			   .strtoul   = STUL_STRARRAYS,
1178 			   .parm      = &strarrays__fcntl_cmds_arrays,
1179 			   .show_zero = true, },
1180 		   [2] = { .scnprintf =  SCA_FCNTL_ARG, /* arg */ }, }, },
1181 	{ .name	    = "flock",
1182 	  .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, },
1183 	{ .name     = "fsconfig",
1184 	  .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, },
1185 	{ .name     = "fsmount",
1186 	  .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags),
1187 		   [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, },
1188 	{ .name     = "fspick",
1189 	  .arg = { [0] = { .scnprintf = SCA_FDAT,	  /* dfd */ },
1190 		   [1] = SCA_FILENAME_FROM_USER(path),
1191 		   [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, },
1192 	{ .name	    = "fstat", .alias = "newfstat", },
1193 	{ .name	    = "futex",
1194 	  .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ },
1195 		   [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, },
1196 	{ .name	    = "futimesat",
1197 	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1198 	{ .name	    = "getitimer",
1199 	  .arg = { [0] = STRARRAY(which, itimers), }, },
1200 	{ .name	    = "getpid",	    .errpid = true, },
1201 	{ .name	    = "getpgid",    .errpid = true, },
1202 	{ .name	    = "getppid",    .errpid = true, },
1203 	{ .name	    = "getrandom",
1204 	  .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, },
1205 	{ .name	    = "getrlimit",
1206 	  .arg = { [0] = STRARRAY(resource, rlimit_resources), }, },
1207 	{ .name	    = "getsockopt",
1208 	  .arg = { [1] = STRARRAY(level, socket_level), }, },
1209 	{ .name	    = "gettid",	    .errpid = true, },
1210 	{ .name	    = "ioctl",
1211 	  .arg = {
1212 #if defined(__i386__) || defined(__x86_64__)
1213 /*
1214  * FIXME: Make this available to all arches.
1215  */
1216 		   [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ },
1217 		   [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
1218 #else
1219 		   [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, },
1220 #endif
1221 	{ .name	    = "kcmp",	    .nr_args = 5,
1222 	  .arg = { [0] = { .name = "pid1",	.scnprintf = SCA_PID, },
1223 		   [1] = { .name = "pid2",	.scnprintf = SCA_PID, },
1224 		   [2] = { .name = "type",	.scnprintf = SCA_KCMP_TYPE, },
1225 		   [3] = { .name = "idx1",	.scnprintf = SCA_KCMP_IDX, },
1226 		   [4] = { .name = "idx2",	.scnprintf = SCA_KCMP_IDX, }, }, },
1227 	{ .name	    = "keyctl",
1228 	  .arg = { [0] = STRARRAY(option, keyctl_options), }, },
1229 	{ .name	    = "kill",
1230 	  .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1231 	{ .name	    = "linkat",
1232 	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1233 	{ .name	    = "lseek",
1234 	  .arg = { [2] = STRARRAY(whence, whences), }, },
1235 	{ .name	    = "lstat", .alias = "newlstat", },
1236 	{ .name     = "madvise",
1237 	  .arg = { [0] = { .scnprintf = SCA_HEX,      /* start */ },
1238 		   [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, },
1239 	{ .name	    = "mkdirat",
1240 	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1241 	{ .name	    = "mknodat",
1242 	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, },
1243 	{ .name	    = "mmap",	    .hexret = true,
1244 /* The standard mmap maps to old_mmap on s390x */
1245 #if defined(__s390x__)
1246 	.alias = "old_mmap",
1247 #endif
1248 	  .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, .show_zero = true, /* prot */ },
1249 		   [3] = { .scnprintf = SCA_MMAP_FLAGS,	/* flags */
1250 			   .strtoul   = STUL_STRARRAY_FLAGS,
1251 			   .parm      = &strarray__mmap_flags, },
1252 		   [5] = { .scnprintf = SCA_HEX,	/* offset */ }, }, },
1253 	{ .name	    = "mount",
1254 	  .arg = { [0] = SCA_FILENAME_FROM_USER(devname),
1255 		   [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
1256 			   .mask_val  = SCAMV_MOUNT_FLAGS, /* flags */ }, }, },
1257 	{ .name	    = "move_mount",
1258 	  .arg = { [0] = { .scnprintf = SCA_FDAT,	/* from_dfd */ },
1259 		   [1] = SCA_FILENAME_FROM_USER(pathname),
1260 		   [2] = { .scnprintf = SCA_FDAT,	/* to_dfd */ },
1261 		   [3] = SCA_FILENAME_FROM_USER(pathname),
1262 		   [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, },
1263 	{ .name	    = "mprotect",
1264 	  .arg = { [0] = { .scnprintf = SCA_HEX,	/* start */ },
1265 		   [2] = { .scnprintf = SCA_MMAP_PROT, .show_zero = true, /* prot */ }, }, },
1266 	{ .name	    = "mq_unlink",
1267 	  .arg = { [0] = SCA_FILENAME_FROM_USER(u_name), }, },
1268 	{ .name	    = "mremap",	    .hexret = true,
1269 	  .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, },
1270 	{ .name	    = "name_to_handle_at",
1271 	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1272 	{ .name	    = "nanosleep",
1273 	  .arg = { [0] = SCA_TIMESPEC_FROM_USER(req), }, },
1274 	{ .name	    = "newfstatat", .alias = "fstatat",
1275 	  .arg = { [0] = { .scnprintf = SCA_FDAT,	  /* dirfd */ },
1276 		   [1] = SCA_FILENAME_FROM_USER(pathname),
1277 		   [3] = { .scnprintf = SCA_FS_AT_FLAGS, /* flags */ }, }, },
1278 	{ .name	    = "open",
1279 	  .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1280 	{ .name	    = "open_by_handle_at",
1281 	  .arg = { [0] = { .scnprintf = SCA_FDAT,	/* dfd */ },
1282 		   [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1283 	{ .name	    = "openat",
1284 	  .arg = { [0] = { .scnprintf = SCA_FDAT,	/* dfd */ },
1285 		   [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, },
1286 	{ .name	    = "perf_event_open",
1287 	  .arg = { [0] = SCA_PERF_ATTR_FROM_USER(attr),
1288 		   [2] = { .scnprintf = SCA_INT,	/* cpu */ },
1289 		   [3] = { .scnprintf = SCA_FD,		/* group_fd */ },
1290 		   [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, },
1291 	{ .name	    = "pipe2",
1292 	  .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, },
1293 	{ .name	    = "pkey_alloc",
1294 	  .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS,	/* access_rights */ }, }, },
1295 	{ .name	    = "pkey_free",
1296 	  .arg = { [0] = { .scnprintf = SCA_INT,	/* key */ }, }, },
1297 	{ .name	    = "pkey_mprotect",
1298 	  .arg = { [0] = { .scnprintf = SCA_HEX,	/* start */ },
1299 		   [2] = { .scnprintf = SCA_MMAP_PROT, .show_zero = true, /* prot */ },
1300 		   [3] = { .scnprintf = SCA_INT,	/* pkey */ }, }, },
1301 	{ .name	    = "poll", .timeout = true, },
1302 	{ .name	    = "ppoll", .timeout = true, },
1303 	{ .name	    = "prctl",
1304 	  .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */
1305 			   .strtoul   = STUL_STRARRAY,
1306 			   .parm      = &strarray__prctl_options, },
1307 		   [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ },
1308 		   [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, },
1309 	{ .name	    = "pread", .alias = "pread64", },
1310 	{ .name	    = "preadv", .alias = "pread", },
1311 	{ .name	    = "prlimit64",
1312 	  .arg = { [1] = STRARRAY(resource, rlimit_resources),
1313 		   [2] = { .from_user = true /* new_rlim */, }, }, },
1314 	{ .name	    = "pwrite", .alias = "pwrite64", },
1315 	{ .name	    = "readlinkat",
1316 	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1317 	{ .name	    = "recvfrom",
1318 	  .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1319 	{ .name	    = "recvmmsg",
1320 	  .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1321 	{ .name	    = "recvmsg",
1322 	  .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1323 	{ .name	    = "renameat",
1324 	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
1325 		   [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, },
1326 	{ .name	    = "renameat2",
1327 	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
1328 		   [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ },
1329 		   [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, },
1330 	{ .name	    = "rseq",	    .errpid = true,
1331 	  .arg = { [0] = { .from_user = true /* rseq */, }, }, },
1332 	{ .name	    = "rt_sigaction",
1333 	  .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1334 	{ .name	    = "rt_sigprocmask",
1335 	  .arg = { [0] = STRARRAY(how, sighow), }, },
1336 	{ .name	    = "rt_sigqueueinfo",
1337 	  .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1338 	{ .name	    = "rt_tgsigqueueinfo",
1339 	  .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1340 	{ .name	    = "sched_setscheduler",
1341 	  .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, },
1342 	{ .name	    = "seccomp",
1343 	  .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP,	   /* op */ },
1344 		   [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, },
1345 	{ .name	    = "select", .timeout = true, },
1346 	{ .name	    = "sendfile", .alias = "sendfile64", },
1347 	{ .name	    = "sendmmsg",
1348 	  .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1349 	{ .name	    = "sendmsg",
1350 	  .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
1351 	{ .name	    = "sendto",
1352 	  .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ },
1353 		   [4] = SCA_SOCKADDR_FROM_USER(addr), }, },
1354 	{ .name	    = "set_robust_list",	    .errpid = true,
1355 	  .arg = { [0] = { .from_user = true /* head */, }, }, },
1356 	{ .name	    = "set_tid_address", .errpid = true, },
1357 	{ .name	    = "setitimer",
1358 	  .arg = { [0] = STRARRAY(which, itimers), }, },
1359 	{ .name	    = "setrlimit",
1360 	  .arg = { [0] = STRARRAY(resource, rlimit_resources),
1361 		   [1] = { .from_user = true /* rlim */, }, }, },
1362 	{ .name	    = "setsockopt",
1363 	  .arg = { [1] = STRARRAY(level, socket_level), }, },
1364 	{ .name	    = "socket",
1365 	  .arg = { [0] = STRARRAY(family, socket_families),
1366 		   [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
1367 		   [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
1368 	{ .name	    = "socketpair",
1369 	  .arg = { [0] = STRARRAY(family, socket_families),
1370 		   [1] = { .scnprintf = SCA_SK_TYPE, /* type */ },
1371 		   [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, },
1372 	{ .name	    = "stat", .alias = "newstat", },
1373 	{ .name	    = "statx",
1374 	  .arg = { [0] = { .scnprintf = SCA_FDAT,	 /* fdat */ },
1375 		   [2] = { .scnprintf = SCA_FS_AT_FLAGS, /* flags */ } ,
1376 		   [3] = { .scnprintf = SCA_STATX_MASK,	 /* mask */ }, }, },
1377 	{ .name	    = "swapoff",
1378 	  .arg = { [0] = SCA_FILENAME_FROM_USER(specialfile), }, },
1379 	{ .name	    = "swapon",
1380 	  .arg = { [0] = SCA_FILENAME_FROM_USER(specialfile), }, },
1381 	{ .name	    = "symlinkat",
1382 	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, },
1383 	{ .name	    = "sync_file_range",
1384 	  .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, },
1385 	{ .name	    = "tgkill",
1386 	  .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1387 	{ .name	    = "tkill",
1388 	  .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, },
1389 	{ .name     = "umount2", .alias = "umount",
1390 	  .arg = { [0] = SCA_FILENAME_FROM_USER(name), }, },
1391 	{ .name	    = "uname", .alias = "newuname", },
1392 	{ .name	    = "unlinkat",
1393 	  .arg = { [0] = { .scnprintf = SCA_FDAT,	  /* dfd */ },
1394 		   [1] = SCA_FILENAME_FROM_USER(pathname),
1395 		   [2] = { .scnprintf = SCA_FS_AT_FLAGS,  /* flags */ }, }, },
1396 	{ .name	    = "utimensat",
1397 	  .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, },
1398 	{ .name	    = "wait4",	    .errpid = true,
1399 	  .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
1400 	{ .name	    = "waitid",	    .errpid = true,
1401 	  .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, },
1402 	{ .name	    = "write",
1403 	  .arg = { [1] = { .scnprintf = SCA_BUF /* buf */, .from_user = true, }, }, },
1404 };
1405 
syscall_fmt__cmp(const void * name,const void * fmtp)1406 static int syscall_fmt__cmp(const void *name, const void *fmtp)
1407 {
1408 	const struct syscall_fmt *fmt = fmtp;
1409 	return strcmp(name, fmt->name);
1410 }
1411 
__syscall_fmt__find(const struct syscall_fmt * fmts,const int nmemb,const char * name)1412 static const struct syscall_fmt *__syscall_fmt__find(const struct syscall_fmt *fmts,
1413 						     const int nmemb,
1414 						     const char *name)
1415 {
1416 	return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
1417 }
1418 
syscall_fmt__find(const char * name)1419 static const struct syscall_fmt *syscall_fmt__find(const char *name)
1420 {
1421 	const int nmemb = ARRAY_SIZE(syscall_fmts);
1422 	return __syscall_fmt__find(syscall_fmts, nmemb, name);
1423 }
1424 
__syscall_fmt__find_by_alias(const struct syscall_fmt * fmts,const int nmemb,const char * alias)1425 static const struct syscall_fmt *__syscall_fmt__find_by_alias(const struct syscall_fmt *fmts,
1426 							      const int nmemb, const char *alias)
1427 {
1428 	int i;
1429 
1430 	for (i = 0; i < nmemb; ++i) {
1431 		if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0)
1432 			return &fmts[i];
1433 	}
1434 
1435 	return NULL;
1436 }
1437 
syscall_fmt__find_by_alias(const char * alias)1438 static const struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias)
1439 {
1440 	const int nmemb = ARRAY_SIZE(syscall_fmts);
1441 	return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias);
1442 }
1443 
1444 /*
1445  * is_exit: is this "exit" or "exit_group"?
1446  * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter.
1447  * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc.
1448  * nonexistent: Just a hole in the syscall table, syscall id not allocated
1449  */
1450 struct syscall {
1451 	struct tep_event    *tp_format;
1452 	int		    nr_args;
1453 	int		    args_size;
1454 	struct {
1455 		struct bpf_program *sys_enter,
1456 				   *sys_exit;
1457 	}		    bpf_prog;
1458 	bool		    is_exit;
1459 	bool		    is_open;
1460 	bool		    nonexistent;
1461 	bool		    use_btf;
1462 	struct tep_format_field *args;
1463 	const char	    *name;
1464 	const struct syscall_fmt  *fmt;
1465 	struct syscall_arg_fmt *arg_fmt;
1466 };
1467 
1468 /*
1469  * We need to have this 'calculated' boolean because in some cases we really
1470  * don't know what is the duration of a syscall, for instance, when we start
1471  * a session and some threads are waiting for a syscall to finish, say 'poll',
1472  * in which case all we can do is to print "( ? ) for duration and for the
1473  * start timestamp.
1474  */
fprintf_duration(unsigned long t,bool calculated,FILE * fp)1475 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
1476 {
1477 	double duration = (double)t / NSEC_PER_MSEC;
1478 	size_t printed = fprintf(fp, "(");
1479 
1480 	if (!calculated)
1481 		printed += fprintf(fp, "         ");
1482 	else if (duration >= 1.0)
1483 		printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
1484 	else if (duration >= 0.01)
1485 		printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
1486 	else
1487 		printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
1488 	return printed + fprintf(fp, "): ");
1489 }
1490 
1491 /**
1492  * filename.ptr: The filename char pointer that will be vfs_getname'd
1493  * filename.entry_str_pos: Where to insert the string translated from
1494  *                         filename.ptr by the vfs_getname tracepoint/kprobe.
1495  * ret_scnprintf: syscall args may set this to a different syscall return
1496  *                formatter, for instance, fcntl may return fds, file flags, etc.
1497  */
1498 struct thread_trace {
1499 	u64		  entry_time;
1500 	bool		  entry_pending;
1501 	unsigned long	  nr_events;
1502 	unsigned long	  pfmaj, pfmin;
1503 	char		  *entry_str;
1504 	double		  runtime_ms;
1505 	size_t		  (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg);
1506         struct {
1507 		unsigned long ptr;
1508 		short int     entry_str_pos;
1509 		bool	      pending_open;
1510 		unsigned int  namelen;
1511 		char	      *name;
1512 	} filename;
1513 	struct {
1514 		int	      max;
1515 		struct file   *table;
1516 	} files;
1517 
1518 	struct intlist *syscall_stats;
1519 };
1520 
thread_trace__new(void)1521 static struct thread_trace *thread_trace__new(void)
1522 {
1523 	struct thread_trace *ttrace =  zalloc(sizeof(struct thread_trace));
1524 
1525 	if (ttrace) {
1526 		ttrace->files.max = -1;
1527 		ttrace->syscall_stats = intlist__new(NULL);
1528 	}
1529 
1530 	return ttrace;
1531 }
1532 
1533 static void thread_trace__free_files(struct thread_trace *ttrace);
1534 
thread_trace__delete(void * pttrace)1535 static void thread_trace__delete(void *pttrace)
1536 {
1537 	struct thread_trace *ttrace = pttrace;
1538 
1539 	if (!ttrace)
1540 		return;
1541 
1542 	intlist__delete(ttrace->syscall_stats);
1543 	ttrace->syscall_stats = NULL;
1544 	thread_trace__free_files(ttrace);
1545 	zfree(&ttrace->entry_str);
1546 	free(ttrace);
1547 }
1548 
thread__trace(struct thread * thread,FILE * fp)1549 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
1550 {
1551 	struct thread_trace *ttrace;
1552 
1553 	if (thread == NULL)
1554 		goto fail;
1555 
1556 	if (thread__priv(thread) == NULL)
1557 		thread__set_priv(thread, thread_trace__new());
1558 
1559 	if (thread__priv(thread) == NULL)
1560 		goto fail;
1561 
1562 	ttrace = thread__priv(thread);
1563 	++ttrace->nr_events;
1564 
1565 	return ttrace;
1566 fail:
1567 	color_fprintf(fp, PERF_COLOR_RED,
1568 		      "WARNING: not enough memory, dropping samples!\n");
1569 	return NULL;
1570 }
1571 
1572 
syscall_arg__set_ret_scnprintf(struct syscall_arg * arg,size_t (* ret_scnprintf)(char * bf,size_t size,struct syscall_arg * arg))1573 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg,
1574 				    size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg))
1575 {
1576 	struct thread_trace *ttrace = thread__priv(arg->thread);
1577 
1578 	ttrace->ret_scnprintf = ret_scnprintf;
1579 }
1580 
1581 #define TRACE_PFMAJ		(1 << 0)
1582 #define TRACE_PFMIN		(1 << 1)
1583 
1584 static const size_t trace__entry_str_size = 2048;
1585 
thread_trace__free_files(struct thread_trace * ttrace)1586 static void thread_trace__free_files(struct thread_trace *ttrace)
1587 {
1588 	for (int i = 0; i < ttrace->files.max; ++i) {
1589 		struct file *file = ttrace->files.table + i;
1590 		zfree(&file->pathname);
1591 	}
1592 
1593 	zfree(&ttrace->files.table);
1594 	ttrace->files.max  = -1;
1595 }
1596 
thread_trace__files_entry(struct thread_trace * ttrace,int fd)1597 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd)
1598 {
1599 	if (fd < 0)
1600 		return NULL;
1601 
1602 	if (fd > ttrace->files.max) {
1603 		struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file));
1604 
1605 		if (nfiles == NULL)
1606 			return NULL;
1607 
1608 		if (ttrace->files.max != -1) {
1609 			memset(nfiles + ttrace->files.max + 1, 0,
1610 			       (fd - ttrace->files.max) * sizeof(struct file));
1611 		} else {
1612 			memset(nfiles, 0, (fd + 1) * sizeof(struct file));
1613 		}
1614 
1615 		ttrace->files.table = nfiles;
1616 		ttrace->files.max   = fd;
1617 	}
1618 
1619 	return ttrace->files.table + fd;
1620 }
1621 
thread__files_entry(struct thread * thread,int fd)1622 struct file *thread__files_entry(struct thread *thread, int fd)
1623 {
1624 	return thread_trace__files_entry(thread__priv(thread), fd);
1625 }
1626 
trace__set_fd_pathname(struct thread * thread,int fd,const char * pathname)1627 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname)
1628 {
1629 	struct thread_trace *ttrace = thread__priv(thread);
1630 	struct file *file = thread_trace__files_entry(ttrace, fd);
1631 
1632 	if (file != NULL) {
1633 		struct stat st;
1634 		if (stat(pathname, &st) == 0)
1635 			file->dev_maj = major(st.st_rdev);
1636 		file->pathname = strdup(pathname);
1637 		if (file->pathname)
1638 			return 0;
1639 	}
1640 
1641 	return -1;
1642 }
1643 
thread__read_fd_path(struct thread * thread,int fd)1644 static int thread__read_fd_path(struct thread *thread, int fd)
1645 {
1646 	char linkname[PATH_MAX], pathname[PATH_MAX];
1647 	struct stat st;
1648 	int ret;
1649 
1650 	if (thread__pid(thread) == thread__tid(thread)) {
1651 		scnprintf(linkname, sizeof(linkname),
1652 			  "/proc/%d/fd/%d", thread__pid(thread), fd);
1653 	} else {
1654 		scnprintf(linkname, sizeof(linkname),
1655 			  "/proc/%d/task/%d/fd/%d",
1656 			  thread__pid(thread), thread__tid(thread), fd);
1657 	}
1658 
1659 	if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname))
1660 		return -1;
1661 
1662 	ret = readlink(linkname, pathname, sizeof(pathname));
1663 
1664 	if (ret < 0 || ret > st.st_size)
1665 		return -1;
1666 
1667 	pathname[ret] = '\0';
1668 	return trace__set_fd_pathname(thread, fd, pathname);
1669 }
1670 
thread__fd_path(struct thread * thread,int fd,struct trace * trace)1671 static const char *thread__fd_path(struct thread *thread, int fd,
1672 				   struct trace *trace)
1673 {
1674 	struct thread_trace *ttrace = thread__priv(thread);
1675 
1676 	if (ttrace == NULL || trace->fd_path_disabled)
1677 		return NULL;
1678 
1679 	if (fd < 0)
1680 		return NULL;
1681 
1682 	if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) {
1683 		if (!trace->live)
1684 			return NULL;
1685 		++trace->stats.proc_getname;
1686 		if (thread__read_fd_path(thread, fd))
1687 			return NULL;
1688 	}
1689 
1690 	return ttrace->files.table[fd].pathname;
1691 }
1692 
syscall_arg__scnprintf_fd(char * bf,size_t size,struct syscall_arg * arg)1693 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
1694 {
1695 	int fd = arg->val;
1696 	size_t printed = scnprintf(bf, size, "%d", fd);
1697 	const char *path = thread__fd_path(arg->thread, fd, arg->trace);
1698 
1699 	if (path)
1700 		printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1701 
1702 	return printed;
1703 }
1704 
pid__scnprintf_fd(struct trace * trace,pid_t pid,int fd,char * bf,size_t size)1705 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
1706 {
1707         size_t printed = scnprintf(bf, size, "%d", fd);
1708 	struct thread *thread = machine__find_thread(trace->host, pid, pid);
1709 
1710 	if (thread) {
1711 		const char *path = thread__fd_path(thread, fd, trace);
1712 
1713 		if (path)
1714 			printed += scnprintf(bf + printed, size - printed, "<%s>", path);
1715 
1716 		thread__put(thread);
1717 	}
1718 
1719         return printed;
1720 }
1721 
syscall_arg__scnprintf_close_fd(char * bf,size_t size,struct syscall_arg * arg)1722 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
1723 					      struct syscall_arg *arg)
1724 {
1725 	int fd = arg->val;
1726 	size_t printed = syscall_arg__scnprintf_fd(bf, size, arg);
1727 	struct thread_trace *ttrace = thread__priv(arg->thread);
1728 
1729 	if (ttrace && fd >= 0 && fd <= ttrace->files.max)
1730 		zfree(&ttrace->files.table[fd].pathname);
1731 
1732 	return printed;
1733 }
1734 
thread__set_filename_pos(struct thread * thread,const char * bf,unsigned long ptr)1735 static void thread__set_filename_pos(struct thread *thread, const char *bf,
1736 				     unsigned long ptr)
1737 {
1738 	struct thread_trace *ttrace = thread__priv(thread);
1739 
1740 	ttrace->filename.ptr = ptr;
1741 	ttrace->filename.entry_str_pos = bf - ttrace->entry_str;
1742 }
1743 
syscall_arg__scnprintf_augmented_string(struct syscall_arg * arg,char * bf,size_t size)1744 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size)
1745 {
1746 	struct augmented_arg *augmented_arg = arg->augmented.args;
1747 	size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value);
1748 	/*
1749 	 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls
1750 	 * we would have two strings, each prefixed by its size.
1751 	 */
1752 	int consumed = sizeof(*augmented_arg) + augmented_arg->size;
1753 
1754 	arg->augmented.args = ((void *)arg->augmented.args) + consumed;
1755 	arg->augmented.size -= consumed;
1756 
1757 	return printed;
1758 }
1759 
syscall_arg__scnprintf_filename(char * bf,size_t size,struct syscall_arg * arg)1760 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size,
1761 					      struct syscall_arg *arg)
1762 {
1763 	unsigned long ptr = arg->val;
1764 
1765 	if (arg->augmented.args)
1766 		return syscall_arg__scnprintf_augmented_string(arg, bf, size);
1767 
1768 	if (!arg->trace->vfs_getname)
1769 		return scnprintf(bf, size, "%#x", ptr);
1770 
1771 	thread__set_filename_pos(arg->thread, bf, ptr);
1772 	return 0;
1773 }
1774 
1775 #define MAX_CONTROL_CHAR 31
1776 #define MAX_ASCII 127
1777 
syscall_arg__scnprintf_buf(char * bf,size_t size,struct syscall_arg * arg)1778 static size_t syscall_arg__scnprintf_buf(char *bf, size_t size, struct syscall_arg *arg)
1779 {
1780 	struct augmented_arg *augmented_arg = arg->augmented.args;
1781 	unsigned char *orig = (unsigned char *)augmented_arg->value;
1782 	size_t printed = 0;
1783 	int consumed;
1784 
1785 	if (augmented_arg == NULL)
1786 		return 0;
1787 
1788 	for (int j = 0; j < augmented_arg->size; ++j) {
1789 		bool control_char = orig[j] <= MAX_CONTROL_CHAR || orig[j] >= MAX_ASCII;
1790 		/* print control characters (0~31 and 127), and non-ascii characters in \(digits) */
1791 		printed += scnprintf(bf + printed, size - printed, control_char ? "\\%d" : "%c", (int)orig[j]);
1792 	}
1793 
1794 	consumed = sizeof(*augmented_arg) + augmented_arg->size;
1795 	arg->augmented.args = ((void *)arg->augmented.args) + consumed;
1796 	arg->augmented.size -= consumed;
1797 
1798 	return printed;
1799 }
1800 
trace__filter_duration(struct trace * trace,double t)1801 static bool trace__filter_duration(struct trace *trace, double t)
1802 {
1803 	return t < (trace->duration_filter * NSEC_PER_MSEC);
1804 }
1805 
__trace__fprintf_tstamp(struct trace * trace,u64 tstamp,FILE * fp)1806 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1807 {
1808 	double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
1809 
1810 	return fprintf(fp, "%10.3f ", ts);
1811 }
1812 
1813 /*
1814  * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are
1815  * using ttrace->entry_time for a thread that receives a sys_exit without
1816  * first having received a sys_enter ("poll" issued before tracing session
1817  * starts, lost sys_enter exit due to ring buffer overflow).
1818  */
trace__fprintf_tstamp(struct trace * trace,u64 tstamp,FILE * fp)1819 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
1820 {
1821 	if (tstamp > 0)
1822 		return __trace__fprintf_tstamp(trace, tstamp, fp);
1823 
1824 	return fprintf(fp, "         ? ");
1825 }
1826 
1827 static pid_t workload_pid = -1;
1828 static volatile sig_atomic_t done = false;
1829 static volatile sig_atomic_t interrupted = false;
1830 
sighandler_interrupt(int sig __maybe_unused)1831 static void sighandler_interrupt(int sig __maybe_unused)
1832 {
1833 	done = interrupted = true;
1834 }
1835 
sighandler_chld(int sig __maybe_unused,siginfo_t * info,void * context __maybe_unused)1836 static void sighandler_chld(int sig __maybe_unused, siginfo_t *info,
1837 			    void *context __maybe_unused)
1838 {
1839 	if (info->si_pid == workload_pid)
1840 		done = true;
1841 }
1842 
trace__fprintf_comm_tid(struct trace * trace,struct thread * thread,FILE * fp)1843 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp)
1844 {
1845 	size_t printed = 0;
1846 
1847 	if (trace->multiple_threads) {
1848 		if (trace->show_comm)
1849 			printed += fprintf(fp, "%.14s/", thread__comm_str(thread));
1850 		printed += fprintf(fp, "%d ", thread__tid(thread));
1851 	}
1852 
1853 	return printed;
1854 }
1855 
trace__fprintf_entry_head(struct trace * trace,struct thread * thread,u64 duration,bool duration_calculated,u64 tstamp,FILE * fp)1856 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
1857 					u64 duration, bool duration_calculated, u64 tstamp, FILE *fp)
1858 {
1859 	size_t printed = 0;
1860 
1861 	if (trace->show_tstamp)
1862 		printed = trace__fprintf_tstamp(trace, tstamp, fp);
1863 	if (trace->show_duration)
1864 		printed += fprintf_duration(duration, duration_calculated, fp);
1865 	return printed + trace__fprintf_comm_tid(trace, thread, fp);
1866 }
1867 
trace__process_event(struct trace * trace,struct machine * machine,union perf_event * event,struct perf_sample * sample)1868 static int trace__process_event(struct trace *trace, struct machine *machine,
1869 				union perf_event *event, struct perf_sample *sample)
1870 {
1871 	int ret = 0;
1872 
1873 	switch (event->header.type) {
1874 	case PERF_RECORD_LOST:
1875 		color_fprintf(trace->output, PERF_COLOR_RED,
1876 			      "LOST %" PRIu64 " events!\n", event->lost.lost);
1877 		ret = machine__process_lost_event(machine, event, sample);
1878 		break;
1879 	default:
1880 		ret = machine__process_event(machine, event, sample);
1881 		break;
1882 	}
1883 
1884 	return ret;
1885 }
1886 
trace__tool_process(const struct perf_tool * tool,union perf_event * event,struct perf_sample * sample,struct machine * machine)1887 static int trace__tool_process(const struct perf_tool *tool,
1888 			       union perf_event *event,
1889 			       struct perf_sample *sample,
1890 			       struct machine *machine)
1891 {
1892 	struct trace *trace = container_of(tool, struct trace, tool);
1893 	return trace__process_event(trace, machine, event, sample);
1894 }
1895 
trace__machine__resolve_kernel_addr(void * vmachine,unsigned long long * addrp,char ** modp)1896 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp)
1897 {
1898 	struct machine *machine = vmachine;
1899 
1900 	if (machine->kptr_restrict_warned)
1901 		return NULL;
1902 
1903 	if (symbol_conf.kptr_restrict) {
1904 		pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
1905 			   "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n"
1906 			   "Kernel samples will not be resolved.\n");
1907 		machine->kptr_restrict_warned = true;
1908 		return NULL;
1909 	}
1910 
1911 	return machine__resolve_kernel_addr(vmachine, addrp, modp);
1912 }
1913 
trace__symbols_init(struct trace * trace,struct evlist * evlist)1914 static int trace__symbols_init(struct trace *trace, struct evlist *evlist)
1915 {
1916 	int err = symbol__init(NULL);
1917 
1918 	if (err)
1919 		return err;
1920 
1921 	trace->host = machine__new_host();
1922 	if (trace->host == NULL)
1923 		return -ENOMEM;
1924 
1925 	thread__set_priv_destructor(thread_trace__delete);
1926 
1927 	err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr);
1928 	if (err < 0)
1929 		goto out;
1930 
1931 	err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target,
1932 					    evlist->core.threads, trace__tool_process,
1933 					    true, false, 1);
1934 out:
1935 	if (err)
1936 		symbol__exit();
1937 
1938 	return err;
1939 }
1940 
trace__symbols__exit(struct trace * trace)1941 static void trace__symbols__exit(struct trace *trace)
1942 {
1943 	machine__exit(trace->host);
1944 	trace->host = NULL;
1945 
1946 	symbol__exit();
1947 }
1948 
syscall__alloc_arg_fmts(struct syscall * sc,int nr_args)1949 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args)
1950 {
1951 	int idx;
1952 
1953 	if (nr_args == RAW_SYSCALL_ARGS_NUM && sc->fmt && sc->fmt->nr_args != 0)
1954 		nr_args = sc->fmt->nr_args;
1955 
1956 	sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));
1957 	if (sc->arg_fmt == NULL)
1958 		return -1;
1959 
1960 	for (idx = 0; idx < nr_args; ++idx) {
1961 		if (sc->fmt)
1962 			sc->arg_fmt[idx] = sc->fmt->arg[idx];
1963 	}
1964 
1965 	sc->nr_args = nr_args;
1966 	return 0;
1967 }
1968 
1969 static const struct syscall_arg_fmt syscall_arg_fmts__by_name[] = {
1970 	{ .name = "msr",	.scnprintf = SCA_X86_MSR,	  .strtoul = STUL_X86_MSR,	   },
1971 	{ .name = "vector",	.scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, },
1972 };
1973 
syscall_arg_fmt__cmp(const void * name,const void * fmtp)1974 static int syscall_arg_fmt__cmp(const void *name, const void *fmtp)
1975 {
1976        const struct syscall_arg_fmt *fmt = fmtp;
1977        return strcmp(name, fmt->name);
1978 }
1979 
1980 static const struct syscall_arg_fmt *
__syscall_arg_fmt__find_by_name(const struct syscall_arg_fmt * fmts,const int nmemb,const char * name)1981 __syscall_arg_fmt__find_by_name(const struct syscall_arg_fmt *fmts, const int nmemb,
1982 				const char *name)
1983 {
1984        return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp);
1985 }
1986 
syscall_arg_fmt__find_by_name(const char * name)1987 static const struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name)
1988 {
1989        const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name);
1990        return __syscall_arg_fmt__find_by_name(syscall_arg_fmts__by_name, nmemb, name);
1991 }
1992 
1993 static struct tep_format_field *
syscall_arg_fmt__init_array(struct syscall_arg_fmt * arg,struct tep_format_field * field,bool * use_btf)1994 syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field,
1995 			    bool *use_btf)
1996 {
1997 	struct tep_format_field *last_field = NULL;
1998 	int len;
1999 
2000 	for (; field; field = field->next, ++arg) {
2001 		last_field = field;
2002 
2003 		if (arg->scnprintf)
2004 			continue;
2005 
2006 		len = strlen(field->name);
2007 
2008 		// As far as heuristics (or intention) goes this seems to hold true, and makes sense!
2009 		if ((field->flags & TEP_FIELD_IS_POINTER) && strstarts(field->type, "const "))
2010 			arg->from_user = true;
2011 
2012 		if (strcmp(field->type, "const char *") == 0 &&
2013 		    ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) ||
2014 		     strstr(field->name, "path") != NULL)) {
2015 			arg->scnprintf = SCA_FILENAME;
2016 		} else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr"))
2017 			arg->scnprintf = SCA_PTR;
2018 		else if (strcmp(field->type, "pid_t") == 0)
2019 			arg->scnprintf = SCA_PID;
2020 		else if (strcmp(field->type, "umode_t") == 0)
2021 			arg->scnprintf = SCA_MODE_T;
2022 		else if ((field->flags & TEP_FIELD_IS_ARRAY) && strstr(field->type, "char")) {
2023 			arg->scnprintf = SCA_CHAR_ARRAY;
2024 			arg->nr_entries = field->arraylen;
2025 		} else if ((strcmp(field->type, "int") == 0 ||
2026 			  strcmp(field->type, "unsigned int") == 0 ||
2027 			  strcmp(field->type, "long") == 0) &&
2028 			 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) {
2029 			/*
2030 			 * /sys/kernel/tracing/events/syscalls/sys_enter*
2031 			 * grep -E 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c
2032 			 * 65 int
2033 			 * 23 unsigned int
2034 			 * 7 unsigned long
2035 			 */
2036 			arg->scnprintf = SCA_FD;
2037 		} else if (strstr(field->type, "enum") && use_btf != NULL) {
2038 			*use_btf = true;
2039 			arg->strtoul = STUL_BTF_TYPE;
2040 		} else {
2041 			const struct syscall_arg_fmt *fmt =
2042 				syscall_arg_fmt__find_by_name(field->name);
2043 
2044 			if (fmt) {
2045 				arg->scnprintf = fmt->scnprintf;
2046 				arg->strtoul   = fmt->strtoul;
2047 			}
2048 		}
2049 	}
2050 
2051 	return last_field;
2052 }
2053 
syscall__set_arg_fmts(struct syscall * sc)2054 static int syscall__set_arg_fmts(struct syscall *sc)
2055 {
2056 	struct tep_format_field *last_field = syscall_arg_fmt__init_array(sc->arg_fmt, sc->args,
2057 									  &sc->use_btf);
2058 
2059 	if (last_field)
2060 		sc->args_size = last_field->offset + last_field->size;
2061 
2062 	return 0;
2063 }
2064 
trace__read_syscall_info(struct trace * trace,int id)2065 static int trace__read_syscall_info(struct trace *trace, int id)
2066 {
2067 	char tp_name[128];
2068 	struct syscall *sc;
2069 	const char *name = syscalltbl__name(trace->sctbl, id);
2070 	int err;
2071 
2072 #ifdef HAVE_SYSCALL_TABLE_SUPPORT
2073 	if (trace->syscalls.table == NULL) {
2074 		trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc));
2075 		if (trace->syscalls.table == NULL)
2076 			return -ENOMEM;
2077 	}
2078 #else
2079 	if (id > trace->sctbl->syscalls.max_id || (id == 0 && trace->syscalls.table == NULL)) {
2080 		// When using libaudit we don't know beforehand what is the max syscall id
2081 		struct syscall *table = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
2082 
2083 		if (table == NULL)
2084 			return -ENOMEM;
2085 
2086 		// Need to memset from offset 0 and +1 members if brand new
2087 		if (trace->syscalls.table == NULL)
2088 			memset(table, 0, (id + 1) * sizeof(*sc));
2089 		else
2090 			memset(table + trace->sctbl->syscalls.max_id + 1, 0, (id - trace->sctbl->syscalls.max_id) * sizeof(*sc));
2091 
2092 		trace->syscalls.table	      = table;
2093 		trace->sctbl->syscalls.max_id = id;
2094 	}
2095 #endif
2096 	sc = trace->syscalls.table + id;
2097 	if (sc->nonexistent)
2098 		return -EEXIST;
2099 
2100 	if (name == NULL) {
2101 		sc->nonexistent = true;
2102 		return -EEXIST;
2103 	}
2104 
2105 	sc->name = name;
2106 	sc->fmt  = syscall_fmt__find(sc->name);
2107 
2108 	snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
2109 	sc->tp_format = trace_event__tp_format("syscalls", tp_name);
2110 
2111 	if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) {
2112 		snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
2113 		sc->tp_format = trace_event__tp_format("syscalls", tp_name);
2114 	}
2115 
2116 	/*
2117 	 * Fails to read trace point format via sysfs node, so the trace point
2118 	 * doesn't exist.  Set the 'nonexistent' flag as true.
2119 	 */
2120 	if (IS_ERR(sc->tp_format)) {
2121 		sc->nonexistent = true;
2122 		return PTR_ERR(sc->tp_format);
2123 	}
2124 
2125 	if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ?
2126 					RAW_SYSCALL_ARGS_NUM : sc->tp_format->format.nr_fields))
2127 		return -ENOMEM;
2128 
2129 	sc->args = sc->tp_format->format.fields;
2130 	/*
2131 	 * We need to check and discard the first variable '__syscall_nr'
2132 	 * or 'nr' that mean the syscall number. It is needless here.
2133 	 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels.
2134 	 */
2135 	if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) {
2136 		sc->args = sc->args->next;
2137 		--sc->nr_args;
2138 	}
2139 
2140 	sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit");
2141 	sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat");
2142 
2143 	err = syscall__set_arg_fmts(sc);
2144 
2145 	/* after calling syscall__set_arg_fmts() we'll know whether use_btf is true */
2146 	if (sc->use_btf)
2147 		trace__load_vmlinux_btf(trace);
2148 
2149 	return err;
2150 }
2151 
evsel__init_tp_arg_scnprintf(struct evsel * evsel,bool * use_btf)2152 static int evsel__init_tp_arg_scnprintf(struct evsel *evsel, bool *use_btf)
2153 {
2154 	struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
2155 
2156 	if (fmt != NULL) {
2157 		syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields, use_btf);
2158 		return 0;
2159 	}
2160 
2161 	return -ENOMEM;
2162 }
2163 
intcmp(const void * a,const void * b)2164 static int intcmp(const void *a, const void *b)
2165 {
2166 	const int *one = a, *another = b;
2167 
2168 	return *one - *another;
2169 }
2170 
trace__validate_ev_qualifier(struct trace * trace)2171 static int trace__validate_ev_qualifier(struct trace *trace)
2172 {
2173 	int err = 0;
2174 	bool printed_invalid_prefix = false;
2175 	struct str_node *pos;
2176 	size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier);
2177 
2178 	trace->ev_qualifier_ids.entries = malloc(nr_allocated *
2179 						 sizeof(trace->ev_qualifier_ids.entries[0]));
2180 
2181 	if (trace->ev_qualifier_ids.entries == NULL) {
2182 		fputs("Error:\tNot enough memory for allocating events qualifier ids\n",
2183 		       trace->output);
2184 		err = -EINVAL;
2185 		goto out;
2186 	}
2187 
2188 	strlist__for_each_entry(pos, trace->ev_qualifier) {
2189 		const char *sc = pos->s;
2190 		int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
2191 
2192 		if (id < 0) {
2193 			id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
2194 			if (id >= 0)
2195 				goto matches;
2196 
2197 			if (!printed_invalid_prefix) {
2198 				pr_debug("Skipping unknown syscalls: ");
2199 				printed_invalid_prefix = true;
2200 			} else {
2201 				pr_debug(", ");
2202 			}
2203 
2204 			pr_debug("%s", sc);
2205 			continue;
2206 		}
2207 matches:
2208 		trace->ev_qualifier_ids.entries[nr_used++] = id;
2209 		if (match_next == -1)
2210 			continue;
2211 
2212 		while (1) {
2213 			id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
2214 			if (id < 0)
2215 				break;
2216 			if (nr_allocated == nr_used) {
2217 				void *entries;
2218 
2219 				nr_allocated += 8;
2220 				entries = realloc(trace->ev_qualifier_ids.entries,
2221 						  nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0]));
2222 				if (entries == NULL) {
2223 					err = -ENOMEM;
2224 					fputs("\nError:\t Not enough memory for parsing\n", trace->output);
2225 					goto out_free;
2226 				}
2227 				trace->ev_qualifier_ids.entries = entries;
2228 			}
2229 			trace->ev_qualifier_ids.entries[nr_used++] = id;
2230 		}
2231 	}
2232 
2233 	trace->ev_qualifier_ids.nr = nr_used;
2234 	qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp);
2235 out:
2236 	if (printed_invalid_prefix)
2237 		pr_debug("\n");
2238 	return err;
2239 out_free:
2240 	zfree(&trace->ev_qualifier_ids.entries);
2241 	trace->ev_qualifier_ids.nr = 0;
2242 	goto out;
2243 }
2244 
trace__syscall_enabled(struct trace * trace,int id)2245 static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id)
2246 {
2247 	bool in_ev_qualifier;
2248 
2249 	if (trace->ev_qualifier_ids.nr == 0)
2250 		return true;
2251 
2252 	in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries,
2253 				  trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL;
2254 
2255 	if (in_ev_qualifier)
2256 	       return !trace->not_ev_qualifier;
2257 
2258 	return trace->not_ev_qualifier;
2259 }
2260 
2261 /*
2262  * args is to be interpreted as a series of longs but we need to handle
2263  * 8-byte unaligned accesses. args points to raw_data within the event
2264  * and raw_data is guaranteed to be 8-byte unaligned because it is
2265  * preceded by raw_size which is a u32. So we need to copy args to a temp
2266  * variable to read it. Most notably this avoids extended load instructions
2267  * on unaligned addresses
2268  */
syscall_arg__val(struct syscall_arg * arg,u8 idx)2269 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx)
2270 {
2271 	unsigned long val;
2272 	unsigned char *p = arg->args + sizeof(unsigned long) * idx;
2273 
2274 	memcpy(&val, p, sizeof(val));
2275 	return val;
2276 }
2277 
syscall__scnprintf_name(struct syscall * sc,char * bf,size_t size,struct syscall_arg * arg)2278 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size,
2279 				      struct syscall_arg *arg)
2280 {
2281 	if (sc->arg_fmt && sc->arg_fmt[arg->idx].name)
2282 		return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name);
2283 
2284 	return scnprintf(bf, size, "arg%d: ", arg->idx);
2285 }
2286 
2287 /*
2288  * Check if the value is in fact zero, i.e. mask whatever needs masking, such
2289  * as mount 'flags' argument that needs ignoring some magic flag, see comment
2290  * in tools/perf/trace/beauty/mount_flags.c
2291  */
syscall_arg_fmt__mask_val(struct syscall_arg_fmt * fmt,struct syscall_arg * arg,unsigned long val)2292 static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val)
2293 {
2294 	if (fmt && fmt->mask_val)
2295 		return fmt->mask_val(arg, val);
2296 
2297 	return val;
2298 }
2299 
syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt * fmt,char * bf,size_t size,struct syscall_arg * arg,unsigned long val)2300 static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size,
2301 					     struct syscall_arg *arg, unsigned long val)
2302 {
2303 	if (fmt && fmt->scnprintf) {
2304 		arg->val = val;
2305 		if (fmt->parm)
2306 			arg->parm = fmt->parm;
2307 		return fmt->scnprintf(bf, size, arg);
2308 	}
2309 	return scnprintf(bf, size, "%ld", val);
2310 }
2311 
syscall__scnprintf_args(struct syscall * sc,char * bf,size_t size,unsigned char * args,void * augmented_args,int augmented_args_size,struct trace * trace,struct thread * thread)2312 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
2313 				      unsigned char *args, void *augmented_args, int augmented_args_size,
2314 				      struct trace *trace, struct thread *thread)
2315 {
2316 	size_t printed = 0, btf_printed;
2317 	unsigned long val;
2318 	u8 bit = 1;
2319 	struct syscall_arg arg = {
2320 		.args	= args,
2321 		.augmented = {
2322 			.size = augmented_args_size,
2323 			.args = augmented_args,
2324 		},
2325 		.idx	= 0,
2326 		.mask	= 0,
2327 		.trace  = trace,
2328 		.thread = thread,
2329 		.show_string_prefix = trace->show_string_prefix,
2330 	};
2331 	struct thread_trace *ttrace = thread__priv(thread);
2332 	void *default_scnprintf;
2333 
2334 	/*
2335 	 * Things like fcntl will set this in its 'cmd' formatter to pick the
2336 	 * right formatter for the return value (an fd? file flags?), which is
2337 	 * not needed for syscalls that always return a given type, say an fd.
2338 	 */
2339 	ttrace->ret_scnprintf = NULL;
2340 
2341 	if (sc->args != NULL) {
2342 		struct tep_format_field *field;
2343 
2344 		for (field = sc->args; field;
2345 		     field = field->next, ++arg.idx, bit <<= 1) {
2346 			if (arg.mask & bit)
2347 				continue;
2348 
2349 			arg.fmt = &sc->arg_fmt[arg.idx];
2350 			val = syscall_arg__val(&arg, arg.idx);
2351 			/*
2352 			 * Some syscall args need some mask, most don't and
2353 			 * return val untouched.
2354 			 */
2355 			val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val);
2356 
2357 			/*
2358 			 * Suppress this argument if its value is zero and show_zero
2359 			 * property isn't set.
2360 			 *
2361 			 * If it has a BTF type, then override the zero suppression knob
2362 			 * as the common case is for zero in an enum to have an associated entry.
2363 			 */
2364 			if (val == 0 && !trace->show_zeros &&
2365 			    !(sc->arg_fmt && sc->arg_fmt[arg.idx].show_zero) &&
2366 			    !(sc->arg_fmt && sc->arg_fmt[arg.idx].strtoul == STUL_BTF_TYPE))
2367 				continue;
2368 
2369 			printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
2370 
2371 			if (trace->show_arg_names)
2372 				printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
2373 
2374 			default_scnprintf = sc->arg_fmt[arg.idx].scnprintf;
2375 
2376 			if (trace->force_btf || default_scnprintf == NULL || default_scnprintf == SCA_PTR) {
2377 				btf_printed = trace__btf_scnprintf(trace, &arg, bf + printed,
2378 								   size - printed, val, field->type);
2379 				if (btf_printed) {
2380 					printed += btf_printed;
2381 					continue;
2382 				}
2383 			}
2384 
2385 			printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx],
2386 								  bf + printed, size - printed, &arg, val);
2387 		}
2388 	} else if (IS_ERR(sc->tp_format)) {
2389 		/*
2390 		 * If we managed to read the tracepoint /format file, then we
2391 		 * may end up not having any args, like with gettid(), so only
2392 		 * print the raw args when we didn't manage to read it.
2393 		 */
2394 		while (arg.idx < sc->nr_args) {
2395 			if (arg.mask & bit)
2396 				goto next_arg;
2397 			val = syscall_arg__val(&arg, arg.idx);
2398 			if (printed)
2399 				printed += scnprintf(bf + printed, size - printed, ", ");
2400 			printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg);
2401 			printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val);
2402 next_arg:
2403 			++arg.idx;
2404 			bit <<= 1;
2405 		}
2406 	}
2407 
2408 	return printed;
2409 }
2410 
2411 typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel,
2412 				  union perf_event *event,
2413 				  struct perf_sample *sample);
2414 
trace__syscall_info(struct trace * trace,struct evsel * evsel,int id)2415 static struct syscall *trace__syscall_info(struct trace *trace,
2416 					   struct evsel *evsel, int id)
2417 {
2418 	int err = 0;
2419 
2420 	if (id < 0) {
2421 
2422 		/*
2423 		 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
2424 		 * before that, leaving at a higher verbosity level till that is
2425 		 * explained. Reproduced with plain ftrace with:
2426 		 *
2427 		 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
2428 		 * grep "NR -1 " /t/trace_pipe
2429 		 *
2430 		 * After generating some load on the machine.
2431  		 */
2432 		if (verbose > 1) {
2433 			static u64 n;
2434 			fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
2435 				id, evsel__name(evsel), ++n);
2436 		}
2437 		return NULL;
2438 	}
2439 
2440 	err = -EINVAL;
2441 
2442 #ifdef HAVE_SYSCALL_TABLE_SUPPORT
2443 	if (id > trace->sctbl->syscalls.max_id) {
2444 #else
2445 	if (id >= trace->sctbl->syscalls.max_id) {
2446 		/*
2447 		 * With libaudit we don't know beforehand what is the max_id,
2448 		 * so we let trace__read_syscall_info() figure that out as we
2449 		 * go on reading syscalls.
2450 		 */
2451 		err = trace__read_syscall_info(trace, id);
2452 		if (err)
2453 #endif
2454 		goto out_cant_read;
2455 	}
2456 
2457 	if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) &&
2458 	    (err = trace__read_syscall_info(trace, id)) != 0)
2459 		goto out_cant_read;
2460 
2461 	if (trace->syscalls.table && trace->syscalls.table[id].nonexistent)
2462 		goto out_cant_read;
2463 
2464 	return &trace->syscalls.table[id];
2465 
2466 out_cant_read:
2467 	if (verbose > 0) {
2468 		char sbuf[STRERR_BUFSIZE];
2469 		fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf)));
2470 		if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL)
2471 			fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
2472 		fputs(" information\n", trace->output);
2473 	}
2474 	return NULL;
2475 }
2476 
2477 struct syscall_stats {
2478 	struct stats stats;
2479 	u64	     nr_failures;
2480 	int	     max_errno;
2481 	u32	     *errnos;
2482 };
2483 
2484 static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace,
2485 				 int id, struct perf_sample *sample, long err, bool errno_summary)
2486 {
2487 	struct int_node *inode;
2488 	struct syscall_stats *stats;
2489 	u64 duration = 0;
2490 
2491 	inode = intlist__findnew(ttrace->syscall_stats, id);
2492 	if (inode == NULL)
2493 		return;
2494 
2495 	stats = inode->priv;
2496 	if (stats == NULL) {
2497 		stats = zalloc(sizeof(*stats));
2498 		if (stats == NULL)
2499 			return;
2500 
2501 		init_stats(&stats->stats);
2502 		inode->priv = stats;
2503 	}
2504 
2505 	if (ttrace->entry_time && sample->time > ttrace->entry_time)
2506 		duration = sample->time - ttrace->entry_time;
2507 
2508 	update_stats(&stats->stats, duration);
2509 
2510 	if (err < 0) {
2511 		++stats->nr_failures;
2512 
2513 		if (!errno_summary)
2514 			return;
2515 
2516 		err = -err;
2517 		if (err > stats->max_errno) {
2518 			u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32));
2519 
2520 			if (new_errnos) {
2521 				memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32));
2522 			} else {
2523 				pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n",
2524 					 thread__comm_str(thread), thread__pid(thread),
2525 					 thread__tid(thread));
2526 				return;
2527 			}
2528 
2529 			stats->errnos = new_errnos;
2530 			stats->max_errno = err;
2531 		}
2532 
2533 		++stats->errnos[err - 1];
2534 	}
2535 }
2536 
2537 static int trace__printf_interrupted_entry(struct trace *trace)
2538 {
2539 	struct thread_trace *ttrace;
2540 	size_t printed;
2541 	int len;
2542 
2543 	if (trace->failure_only || trace->current == NULL)
2544 		return 0;
2545 
2546 	ttrace = thread__priv(trace->current);
2547 
2548 	if (!ttrace->entry_pending)
2549 		return 0;
2550 
2551 	printed  = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output);
2552 	printed += len = fprintf(trace->output, "%s)", ttrace->entry_str);
2553 
2554 	if (len < trace->args_alignment - 4)
2555 		printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " ");
2556 
2557 	printed += fprintf(trace->output, " ...\n");
2558 
2559 	ttrace->entry_pending = false;
2560 	++trace->nr_events_printed;
2561 
2562 	return printed;
2563 }
2564 
2565 static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel,
2566 				 struct perf_sample *sample, struct thread *thread)
2567 {
2568 	int printed = 0;
2569 
2570 	if (trace->print_sample) {
2571 		double ts = (double)sample->time / NSEC_PER_MSEC;
2572 
2573 		printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n",
2574 				   evsel__name(evsel), ts,
2575 				   thread__comm_str(thread),
2576 				   sample->pid, sample->tid, sample->cpu);
2577 	}
2578 
2579 	return printed;
2580 }
2581 
2582 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size)
2583 {
2584 	void *augmented_args = NULL;
2585 	/*
2586 	 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter
2587 	 * and there we get all 6 syscall args plus the tracepoint common fields
2588 	 * that gets calculated at the start and the syscall_nr (another long).
2589 	 * So we check if that is the case and if so don't look after the
2590 	 * sc->args_size but always after the full raw_syscalls:sys_enter payload,
2591 	 * which is fixed.
2592 	 *
2593 	 * We'll revisit this later to pass s->args_size to the BPF augmenter
2594 	 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it
2595 	 * copies only what we need for each syscall, like what happens when we
2596 	 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace
2597 	 * traffic to just what is needed for each syscall.
2598 	 */
2599 	int args_size = raw_augmented_args_size ?: sc->args_size;
2600 
2601 	*augmented_args_size = sample->raw_size - args_size;
2602 	if (*augmented_args_size > 0)
2603 		augmented_args = sample->raw_data + args_size;
2604 
2605 	return augmented_args;
2606 }
2607 
2608 static void syscall__exit(struct syscall *sc)
2609 {
2610 	if (!sc)
2611 		return;
2612 
2613 	zfree(&sc->arg_fmt);
2614 }
2615 
2616 static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
2617 			    union perf_event *event __maybe_unused,
2618 			    struct perf_sample *sample)
2619 {
2620 	char *msg;
2621 	void *args;
2622 	int printed = 0;
2623 	struct thread *thread;
2624 	int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2625 	int augmented_args_size = 0;
2626 	void *augmented_args = NULL;
2627 	struct syscall *sc = trace__syscall_info(trace, evsel, id);
2628 	struct thread_trace *ttrace;
2629 
2630 	if (sc == NULL)
2631 		return -1;
2632 
2633 	thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2634 	ttrace = thread__trace(thread, trace->output);
2635 	if (ttrace == NULL)
2636 		goto out_put;
2637 
2638 	trace__fprintf_sample(trace, evsel, sample, thread);
2639 
2640 	args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2641 
2642 	if (ttrace->entry_str == NULL) {
2643 		ttrace->entry_str = malloc(trace__entry_str_size);
2644 		if (!ttrace->entry_str)
2645 			goto out_put;
2646 	}
2647 
2648 	if (!(trace->duration_filter || trace->summary_only || trace->min_stack))
2649 		trace__printf_interrupted_entry(trace);
2650 	/*
2651 	 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible
2652 	 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments
2653 	 * this breaks syscall__augmented_args() check for augmented args, as we calculate
2654 	 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file,
2655 	 * so when handling, say the openat syscall, we end up getting 6 args for the
2656 	 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly
2657 	 * thinking that the extra 2 u64 args are the augmented filename, so just check
2658 	 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one.
2659 	 */
2660 	if (evsel != trace->syscalls.events.sys_enter)
2661 		augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2662 	ttrace->entry_time = sample->time;
2663 	msg = ttrace->entry_str;
2664 	printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name);
2665 
2666 	printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed,
2667 					   args, augmented_args, augmented_args_size, trace, thread);
2668 
2669 	if (sc->is_exit) {
2670 		if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) {
2671 			int alignment = 0;
2672 
2673 			trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output);
2674 			printed = fprintf(trace->output, "%s)", ttrace->entry_str);
2675 			if (trace->args_alignment > printed)
2676 				alignment = trace->args_alignment - printed;
2677 			fprintf(trace->output, "%*s= ?\n", alignment, " ");
2678 		}
2679 	} else {
2680 		ttrace->entry_pending = true;
2681 		/* See trace__vfs_getname & trace__sys_exit */
2682 		ttrace->filename.pending_open = false;
2683 	}
2684 
2685 	if (trace->current != thread) {
2686 		thread__put(trace->current);
2687 		trace->current = thread__get(thread);
2688 	}
2689 	err = 0;
2690 out_put:
2691 	thread__put(thread);
2692 	return err;
2693 }
2694 
2695 static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
2696 				    struct perf_sample *sample)
2697 {
2698 	struct thread_trace *ttrace;
2699 	struct thread *thread;
2700 	int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
2701 	struct syscall *sc = trace__syscall_info(trace, evsel, id);
2702 	char msg[1024];
2703 	void *args, *augmented_args = NULL;
2704 	int augmented_args_size;
2705 
2706 	if (sc == NULL)
2707 		return -1;
2708 
2709 	thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2710 	ttrace = thread__trace(thread, trace->output);
2711 	/*
2712 	 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
2713 	 * and the rest of the beautifiers accessing it via struct syscall_arg touches it.
2714 	 */
2715 	if (ttrace == NULL)
2716 		goto out_put;
2717 
2718 	args = perf_evsel__sc_tp_ptr(evsel, args, sample);
2719 	augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size);
2720 	syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread);
2721 	fprintf(trace->output, "%s", msg);
2722 	err = 0;
2723 out_put:
2724 	thread__put(thread);
2725 	return err;
2726 }
2727 
2728 static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel,
2729 				    struct perf_sample *sample,
2730 				    struct callchain_cursor *cursor)
2731 {
2732 	struct addr_location al;
2733 	int max_stack = evsel->core.attr.sample_max_stack ?
2734 			evsel->core.attr.sample_max_stack :
2735 			trace->max_stack;
2736 	int err = -1;
2737 
2738 	addr_location__init(&al);
2739 	if (machine__resolve(trace->host, &al, sample) < 0)
2740 		goto out;
2741 
2742 	err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack);
2743 out:
2744 	addr_location__exit(&al);
2745 	return err;
2746 }
2747 
2748 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample)
2749 {
2750 	/* TODO: user-configurable print_opts */
2751 	const unsigned int print_opts = EVSEL__PRINT_SYM |
2752 				        EVSEL__PRINT_DSO |
2753 				        EVSEL__PRINT_UNKNOWN_AS_ADDR;
2754 
2755 	return sample__fprintf_callchain(sample, 38, print_opts, get_tls_callchain_cursor(), symbol_conf.bt_stop_list, trace->output);
2756 }
2757 
2758 static const char *errno_to_name(struct evsel *evsel, int err)
2759 {
2760 	struct perf_env *env = evsel__env(evsel);
2761 
2762 	return perf_env__arch_strerrno(env, err);
2763 }
2764 
2765 static int trace__sys_exit(struct trace *trace, struct evsel *evsel,
2766 			   union perf_event *event __maybe_unused,
2767 			   struct perf_sample *sample)
2768 {
2769 	long ret;
2770 	u64 duration = 0;
2771 	bool duration_calculated = false;
2772 	struct thread *thread;
2773 	int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
2774 	int alignment = trace->args_alignment;
2775 	struct syscall *sc = trace__syscall_info(trace, evsel, id);
2776 	struct thread_trace *ttrace;
2777 
2778 	if (sc == NULL)
2779 		return -1;
2780 
2781 	thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2782 	ttrace = thread__trace(thread, trace->output);
2783 	if (ttrace == NULL)
2784 		goto out_put;
2785 
2786 	trace__fprintf_sample(trace, evsel, sample, thread);
2787 
2788 	ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
2789 
2790 	if (trace->summary)
2791 		thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary);
2792 
2793 	if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) {
2794 		trace__set_fd_pathname(thread, ret, ttrace->filename.name);
2795 		ttrace->filename.pending_open = false;
2796 		++trace->stats.vfs_getname;
2797 	}
2798 
2799 	if (ttrace->entry_time) {
2800 		duration = sample->time - ttrace->entry_time;
2801 		if (trace__filter_duration(trace, duration))
2802 			goto out;
2803 		duration_calculated = true;
2804 	} else if (trace->duration_filter)
2805 		goto out;
2806 
2807 	if (sample->callchain) {
2808 		struct callchain_cursor *cursor = get_tls_callchain_cursor();
2809 
2810 		callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor);
2811 		if (callchain_ret == 0) {
2812 			if (cursor->nr < trace->min_stack)
2813 				goto out;
2814 			callchain_ret = 1;
2815 		}
2816 	}
2817 
2818 	if (trace->summary_only || (ret >= 0 && trace->failure_only))
2819 		goto out;
2820 
2821 	trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output);
2822 
2823 	if (ttrace->entry_pending) {
2824 		printed = fprintf(trace->output, "%s", ttrace->entry_str);
2825 	} else {
2826 		printed += fprintf(trace->output, " ... [");
2827 		color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
2828 		printed += 9;
2829 		printed += fprintf(trace->output, "]: %s()", sc->name);
2830 	}
2831 
2832 	printed++; /* the closing ')' */
2833 
2834 	if (alignment > printed)
2835 		alignment -= printed;
2836 	else
2837 		alignment = 0;
2838 
2839 	fprintf(trace->output, ")%*s= ", alignment, " ");
2840 
2841 	if (sc->fmt == NULL) {
2842 		if (ret < 0)
2843 			goto errno_print;
2844 signed_print:
2845 		fprintf(trace->output, "%ld", ret);
2846 	} else if (ret < 0) {
2847 errno_print: {
2848 		char bf[STRERR_BUFSIZE];
2849 		const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
2850 			   *e = errno_to_name(evsel, -ret);
2851 
2852 		fprintf(trace->output, "-1 %s (%s)", e, emsg);
2853 	}
2854 	} else if (ret == 0 && sc->fmt->timeout)
2855 		fprintf(trace->output, "0 (Timeout)");
2856 	else if (ttrace->ret_scnprintf) {
2857 		char bf[1024];
2858 		struct syscall_arg arg = {
2859 			.val	= ret,
2860 			.thread	= thread,
2861 			.trace	= trace,
2862 		};
2863 		ttrace->ret_scnprintf(bf, sizeof(bf), &arg);
2864 		ttrace->ret_scnprintf = NULL;
2865 		fprintf(trace->output, "%s", bf);
2866 	} else if (sc->fmt->hexret)
2867 		fprintf(trace->output, "%#lx", ret);
2868 	else if (sc->fmt->errpid) {
2869 		struct thread *child = machine__find_thread(trace->host, ret, ret);
2870 
2871 		if (child != NULL) {
2872 			fprintf(trace->output, "%ld", ret);
2873 			if (thread__comm_set(child))
2874 				fprintf(trace->output, " (%s)", thread__comm_str(child));
2875 			thread__put(child);
2876 		}
2877 	} else
2878 		goto signed_print;
2879 
2880 	fputc('\n', trace->output);
2881 
2882 	/*
2883 	 * We only consider an 'event' for the sake of --max-events a non-filtered
2884 	 * sys_enter + sys_exit and other tracepoint events.
2885 	 */
2886 	if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX)
2887 		interrupted = true;
2888 
2889 	if (callchain_ret > 0)
2890 		trace__fprintf_callchain(trace, sample);
2891 	else if (callchain_ret < 0)
2892 		pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
2893 out:
2894 	ttrace->entry_pending = false;
2895 	err = 0;
2896 out_put:
2897 	thread__put(thread);
2898 	return err;
2899 }
2900 
2901 static int trace__vfs_getname(struct trace *trace, struct evsel *evsel,
2902 			      union perf_event *event __maybe_unused,
2903 			      struct perf_sample *sample)
2904 {
2905 	struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
2906 	struct thread_trace *ttrace;
2907 	size_t filename_len, entry_str_len, to_move;
2908 	ssize_t remaining_space;
2909 	char *pos;
2910 	const char *filename = evsel__rawptr(evsel, sample, "pathname");
2911 
2912 	if (!thread)
2913 		goto out;
2914 
2915 	ttrace = thread__priv(thread);
2916 	if (!ttrace)
2917 		goto out_put;
2918 
2919 	filename_len = strlen(filename);
2920 	if (filename_len == 0)
2921 		goto out_put;
2922 
2923 	if (ttrace->filename.namelen < filename_len) {
2924 		char *f = realloc(ttrace->filename.name, filename_len + 1);
2925 
2926 		if (f == NULL)
2927 			goto out_put;
2928 
2929 		ttrace->filename.namelen = filename_len;
2930 		ttrace->filename.name = f;
2931 	}
2932 
2933 	strcpy(ttrace->filename.name, filename);
2934 	ttrace->filename.pending_open = true;
2935 
2936 	if (!ttrace->filename.ptr)
2937 		goto out_put;
2938 
2939 	entry_str_len = strlen(ttrace->entry_str);
2940 	remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */
2941 	if (remaining_space <= 0)
2942 		goto out_put;
2943 
2944 	if (filename_len > (size_t)remaining_space) {
2945 		filename += filename_len - remaining_space;
2946 		filename_len = remaining_space;
2947 	}
2948 
2949 	to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */
2950 	pos = ttrace->entry_str + ttrace->filename.entry_str_pos;
2951 	memmove(pos + filename_len, pos, to_move);
2952 	memcpy(pos, filename, filename_len);
2953 
2954 	ttrace->filename.ptr = 0;
2955 	ttrace->filename.entry_str_pos = 0;
2956 out_put:
2957 	thread__put(thread);
2958 out:
2959 	return 0;
2960 }
2961 
2962 static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel,
2963 				     union perf_event *event __maybe_unused,
2964 				     struct perf_sample *sample)
2965 {
2966         u64 runtime = evsel__intval(evsel, sample, "runtime");
2967 	double runtime_ms = (double)runtime / NSEC_PER_MSEC;
2968 	struct thread *thread = machine__findnew_thread(trace->host,
2969 							sample->pid,
2970 							sample->tid);
2971 	struct thread_trace *ttrace = thread__trace(thread, trace->output);
2972 
2973 	if (ttrace == NULL)
2974 		goto out_dump;
2975 
2976 	ttrace->runtime_ms += runtime_ms;
2977 	trace->runtime_ms += runtime_ms;
2978 out_put:
2979 	thread__put(thread);
2980 	return 0;
2981 
2982 out_dump:
2983 	fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
2984 	       evsel->name,
2985 	       evsel__strval(evsel, sample, "comm"),
2986 	       (pid_t)evsel__intval(evsel, sample, "pid"),
2987 	       runtime,
2988 	       evsel__intval(evsel, sample, "vruntime"));
2989 	goto out_put;
2990 }
2991 
2992 static int bpf_output__printer(enum binary_printer_ops op,
2993 			       unsigned int val, void *extra __maybe_unused, FILE *fp)
2994 {
2995 	unsigned char ch = (unsigned char)val;
2996 
2997 	switch (op) {
2998 	case BINARY_PRINT_CHAR_DATA:
2999 		return fprintf(fp, "%c", isprint(ch) ? ch : '.');
3000 	case BINARY_PRINT_DATA_BEGIN:
3001 	case BINARY_PRINT_LINE_BEGIN:
3002 	case BINARY_PRINT_ADDR:
3003 	case BINARY_PRINT_NUM_DATA:
3004 	case BINARY_PRINT_NUM_PAD:
3005 	case BINARY_PRINT_SEP:
3006 	case BINARY_PRINT_CHAR_PAD:
3007 	case BINARY_PRINT_LINE_END:
3008 	case BINARY_PRINT_DATA_END:
3009 	default:
3010 		break;
3011 	}
3012 
3013 	return 0;
3014 }
3015 
3016 static void bpf_output__fprintf(struct trace *trace,
3017 				struct perf_sample *sample)
3018 {
3019 	binary__fprintf(sample->raw_data, sample->raw_size, 8,
3020 			bpf_output__printer, NULL, trace->output);
3021 	++trace->nr_events_printed;
3022 }
3023 
3024 static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample,
3025 				       struct thread *thread, void *augmented_args, int augmented_args_size)
3026 {
3027 	char bf[2048];
3028 	size_t size = sizeof(bf);
3029 	struct tep_format_field *field = evsel->tp_format->format.fields;
3030 	struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel);
3031 	size_t printed = 0, btf_printed;
3032 	unsigned long val;
3033 	u8 bit = 1;
3034 	struct syscall_arg syscall_arg = {
3035 		.augmented = {
3036 			.size = augmented_args_size,
3037 			.args = augmented_args,
3038 		},
3039 		.idx	= 0,
3040 		.mask	= 0,
3041 		.trace  = trace,
3042 		.thread = thread,
3043 		.show_string_prefix = trace->show_string_prefix,
3044 	};
3045 
3046 	for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) {
3047 		if (syscall_arg.mask & bit)
3048 			continue;
3049 
3050 		syscall_arg.len = 0;
3051 		syscall_arg.fmt = arg;
3052 		if (field->flags & TEP_FIELD_IS_ARRAY) {
3053 			int offset = field->offset;
3054 
3055 			if (field->flags & TEP_FIELD_IS_DYNAMIC) {
3056 				offset = format_field__intval(field, sample, evsel->needs_swap);
3057 				syscall_arg.len = offset >> 16;
3058 				offset &= 0xffff;
3059 				if (tep_field_is_relative(field->flags))
3060 					offset += field->offset + field->size;
3061 			}
3062 
3063 			val = (uintptr_t)(sample->raw_data + offset);
3064 		} else
3065 			val = format_field__intval(field, sample, evsel->needs_swap);
3066 		/*
3067 		 * Some syscall args need some mask, most don't and
3068 		 * return val untouched.
3069 		 */
3070 		val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val);
3071 
3072 		/* Suppress this argument if its value is zero and show_zero property isn't set. */
3073 		if (val == 0 && !trace->show_zeros && !arg->show_zero && arg->strtoul != STUL_BTF_TYPE)
3074 			continue;
3075 
3076 		printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
3077 
3078 		if (trace->show_arg_names)
3079 			printed += scnprintf(bf + printed, size - printed, "%s: ", field->name);
3080 
3081 		btf_printed = trace__btf_scnprintf(trace, &syscall_arg, bf + printed, size - printed, val, field->type);
3082 		if (btf_printed) {
3083 			printed += btf_printed;
3084 			continue;
3085 		}
3086 
3087 		printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val);
3088 	}
3089 
3090 	return printed + fprintf(trace->output, "%s", bf);
3091 }
3092 
3093 static int trace__event_handler(struct trace *trace, struct evsel *evsel,
3094 				union perf_event *event __maybe_unused,
3095 				struct perf_sample *sample)
3096 {
3097 	struct thread *thread;
3098 	int callchain_ret = 0;
3099 	/*
3100 	 * Check if we called perf_evsel__disable(evsel) due to, for instance,
3101 	 * this event's max_events having been hit and this is an entry coming
3102 	 * from the ring buffer that we should discard, since the max events
3103 	 * have already been considered/printed.
3104 	 */
3105 	if (evsel->disabled)
3106 		return 0;
3107 
3108 	thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
3109 
3110 	if (sample->callchain) {
3111 		struct callchain_cursor *cursor = get_tls_callchain_cursor();
3112 
3113 		callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor);
3114 		if (callchain_ret == 0) {
3115 			if (cursor->nr < trace->min_stack)
3116 				goto out;
3117 			callchain_ret = 1;
3118 		}
3119 	}
3120 
3121 	trace__printf_interrupted_entry(trace);
3122 	trace__fprintf_tstamp(trace, sample->time, trace->output);
3123 
3124 	if (trace->trace_syscalls && trace->show_duration)
3125 		fprintf(trace->output, "(         ): ");
3126 
3127 	if (thread)
3128 		trace__fprintf_comm_tid(trace, thread, trace->output);
3129 
3130 	if (evsel == trace->syscalls.events.bpf_output) {
3131 		int id = perf_evsel__sc_tp_uint(evsel, id, sample);
3132 		struct syscall *sc = trace__syscall_info(trace, evsel, id);
3133 
3134 		if (sc) {
3135 			fprintf(trace->output, "%s(", sc->name);
3136 			trace__fprintf_sys_enter(trace, evsel, sample);
3137 			fputc(')', trace->output);
3138 			goto newline;
3139 		}
3140 
3141 		/*
3142 		 * XXX: Not having the associated syscall info or not finding/adding
3143 		 * 	the thread should never happen, but if it does...
3144 		 * 	fall thru and print it as a bpf_output event.
3145 		 */
3146 	}
3147 
3148 	fprintf(trace->output, "%s(", evsel->name);
3149 
3150 	if (evsel__is_bpf_output(evsel)) {
3151 		bpf_output__fprintf(trace, sample);
3152 	} else if (evsel->tp_format) {
3153 		if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
3154 		    trace__fprintf_sys_enter(trace, evsel, sample)) {
3155 			if (trace->libtraceevent_print) {
3156 				event_format__fprintf(evsel->tp_format, sample->cpu,
3157 						      sample->raw_data, sample->raw_size,
3158 						      trace->output);
3159 			} else {
3160 				trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0);
3161 			}
3162 		}
3163 	}
3164 
3165 newline:
3166 	fprintf(trace->output, ")\n");
3167 
3168 	if (callchain_ret > 0)
3169 		trace__fprintf_callchain(trace, sample);
3170 	else if (callchain_ret < 0)
3171 		pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
3172 
3173 	++trace->nr_events_printed;
3174 
3175 	if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
3176 		evsel__disable(evsel);
3177 		evsel__close(evsel);
3178 	}
3179 out:
3180 	thread__put(thread);
3181 	return 0;
3182 }
3183 
3184 static void print_location(FILE *f, struct perf_sample *sample,
3185 			   struct addr_location *al,
3186 			   bool print_dso, bool print_sym)
3187 {
3188 
3189 	if ((verbose > 0 || print_dso) && al->map)
3190 		fprintf(f, "%s@", dso__long_name(map__dso(al->map)));
3191 
3192 	if ((verbose > 0 || print_sym) && al->sym)
3193 		fprintf(f, "%s+0x%" PRIx64, al->sym->name,
3194 			al->addr - al->sym->start);
3195 	else if (al->map)
3196 		fprintf(f, "0x%" PRIx64, al->addr);
3197 	else
3198 		fprintf(f, "0x%" PRIx64, sample->addr);
3199 }
3200 
3201 static int trace__pgfault(struct trace *trace,
3202 			  struct evsel *evsel,
3203 			  union perf_event *event __maybe_unused,
3204 			  struct perf_sample *sample)
3205 {
3206 	struct thread *thread;
3207 	struct addr_location al;
3208 	char map_type = 'd';
3209 	struct thread_trace *ttrace;
3210 	int err = -1;
3211 	int callchain_ret = 0;
3212 
3213 	addr_location__init(&al);
3214 	thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
3215 
3216 	if (sample->callchain) {
3217 		struct callchain_cursor *cursor = get_tls_callchain_cursor();
3218 
3219 		callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor);
3220 		if (callchain_ret == 0) {
3221 			if (cursor->nr < trace->min_stack)
3222 				goto out_put;
3223 			callchain_ret = 1;
3224 		}
3225 	}
3226 
3227 	ttrace = thread__trace(thread, trace->output);
3228 	if (ttrace == NULL)
3229 		goto out_put;
3230 
3231 	if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)
3232 		ttrace->pfmaj++;
3233 	else
3234 		ttrace->pfmin++;
3235 
3236 	if (trace->summary_only)
3237 		goto out;
3238 
3239 	thread__find_symbol(thread, sample->cpumode, sample->ip, &al);
3240 
3241 	trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output);
3242 
3243 	fprintf(trace->output, "%sfault [",
3244 		evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ?
3245 		"maj" : "min");
3246 
3247 	print_location(trace->output, sample, &al, false, true);
3248 
3249 	fprintf(trace->output, "] => ");
3250 
3251 	thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
3252 
3253 	if (!al.map) {
3254 		thread__find_symbol(thread, sample->cpumode, sample->addr, &al);
3255 
3256 		if (al.map)
3257 			map_type = 'x';
3258 		else
3259 			map_type = '?';
3260 	}
3261 
3262 	print_location(trace->output, sample, &al, true, false);
3263 
3264 	fprintf(trace->output, " (%c%c)\n", map_type, al.level);
3265 
3266 	if (callchain_ret > 0)
3267 		trace__fprintf_callchain(trace, sample);
3268 	else if (callchain_ret < 0)
3269 		pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel));
3270 
3271 	++trace->nr_events_printed;
3272 out:
3273 	err = 0;
3274 out_put:
3275 	thread__put(thread);
3276 	addr_location__exit(&al);
3277 	return err;
3278 }
3279 
3280 static void trace__set_base_time(struct trace *trace,
3281 				 struct evsel *evsel,
3282 				 struct perf_sample *sample)
3283 {
3284 	/*
3285 	 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust
3286 	 * and don't use sample->time unconditionally, we may end up having
3287 	 * some other event in the future without PERF_SAMPLE_TIME for good
3288 	 * reason, i.e. we may not be interested in its timestamps, just in
3289 	 * it taking place, picking some piece of information when it
3290 	 * appears in our event stream (vfs_getname comes to mind).
3291 	 */
3292 	if (trace->base_time == 0 && !trace->full_time &&
3293 	    (evsel->core.attr.sample_type & PERF_SAMPLE_TIME))
3294 		trace->base_time = sample->time;
3295 }
3296 
3297 static int trace__process_sample(const struct perf_tool *tool,
3298 				 union perf_event *event,
3299 				 struct perf_sample *sample,
3300 				 struct evsel *evsel,
3301 				 struct machine *machine __maybe_unused)
3302 {
3303 	struct trace *trace = container_of(tool, struct trace, tool);
3304 	struct thread *thread;
3305 	int err = 0;
3306 
3307 	tracepoint_handler handler = evsel->handler;
3308 
3309 	thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
3310 	if (thread && thread__is_filtered(thread))
3311 		goto out;
3312 
3313 	trace__set_base_time(trace, evsel, sample);
3314 
3315 	if (handler) {
3316 		++trace->nr_events;
3317 		handler(trace, evsel, event, sample);
3318 	}
3319 out:
3320 	thread__put(thread);
3321 	return err;
3322 }
3323 
3324 static int trace__record(struct trace *trace, int argc, const char **argv)
3325 {
3326 	unsigned int rec_argc, i, j;
3327 	const char **rec_argv;
3328 	const char * const record_args[] = {
3329 		"record",
3330 		"-R",
3331 		"-m", "1024",
3332 		"-c", "1",
3333 	};
3334 	pid_t pid = getpid();
3335 	char *filter = asprintf__tp_filter_pids(1, &pid);
3336 	const char * const sc_args[] = { "-e", };
3337 	unsigned int sc_args_nr = ARRAY_SIZE(sc_args);
3338 	const char * const majpf_args[] = { "-e", "major-faults" };
3339 	unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args);
3340 	const char * const minpf_args[] = { "-e", "minor-faults" };
3341 	unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args);
3342 	int err = -1;
3343 
3344 	/* +3 is for the event string below and the pid filter */
3345 	rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 +
3346 		majpf_args_nr + minpf_args_nr + argc;
3347 	rec_argv = calloc(rec_argc + 1, sizeof(char *));
3348 
3349 	if (rec_argv == NULL || filter == NULL)
3350 		goto out_free;
3351 
3352 	j = 0;
3353 	for (i = 0; i < ARRAY_SIZE(record_args); i++)
3354 		rec_argv[j++] = record_args[i];
3355 
3356 	if (trace->trace_syscalls) {
3357 		for (i = 0; i < sc_args_nr; i++)
3358 			rec_argv[j++] = sc_args[i];
3359 
3360 		/* event string may be different for older kernels - e.g., RHEL6 */
3361 		if (is_valid_tracepoint("raw_syscalls:sys_enter"))
3362 			rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit";
3363 		else if (is_valid_tracepoint("syscalls:sys_enter"))
3364 			rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit";
3365 		else {
3366 			pr_err("Neither raw_syscalls nor syscalls events exist.\n");
3367 			goto out_free;
3368 		}
3369 	}
3370 
3371 	rec_argv[j++] = "--filter";
3372 	rec_argv[j++] = filter;
3373 
3374 	if (trace->trace_pgfaults & TRACE_PFMAJ)
3375 		for (i = 0; i < majpf_args_nr; i++)
3376 			rec_argv[j++] = majpf_args[i];
3377 
3378 	if (trace->trace_pgfaults & TRACE_PFMIN)
3379 		for (i = 0; i < minpf_args_nr; i++)
3380 			rec_argv[j++] = minpf_args[i];
3381 
3382 	for (i = 0; i < (unsigned int)argc; i++)
3383 		rec_argv[j++] = argv[i];
3384 
3385 	err = cmd_record(j, rec_argv);
3386 out_free:
3387 	free(filter);
3388 	free(rec_argv);
3389 	return err;
3390 }
3391 
3392 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
3393 
3394 static bool evlist__add_vfs_getname(struct evlist *evlist)
3395 {
3396 	bool found = false;
3397 	struct evsel *evsel, *tmp;
3398 	struct parse_events_error err;
3399 	int ret;
3400 
3401 	parse_events_error__init(&err);
3402 	ret = parse_events(evlist, "probe:vfs_getname*", &err);
3403 	parse_events_error__exit(&err);
3404 	if (ret)
3405 		return false;
3406 
3407 	evlist__for_each_entry_safe(evlist, evsel, tmp) {
3408 		if (!strstarts(evsel__name(evsel), "probe:vfs_getname"))
3409 			continue;
3410 
3411 		if (evsel__field(evsel, "pathname")) {
3412 			evsel->handler = trace__vfs_getname;
3413 			found = true;
3414 			continue;
3415 		}
3416 
3417 		list_del_init(&evsel->core.node);
3418 		evsel->evlist = NULL;
3419 		evsel__delete(evsel);
3420 	}
3421 
3422 	return found;
3423 }
3424 
3425 static struct evsel *evsel__new_pgfault(u64 config)
3426 {
3427 	struct evsel *evsel;
3428 	struct perf_event_attr attr = {
3429 		.type = PERF_TYPE_SOFTWARE,
3430 		.mmap_data = 1,
3431 	};
3432 
3433 	attr.config = config;
3434 	attr.sample_period = 1;
3435 
3436 	event_attr_init(&attr);
3437 
3438 	evsel = evsel__new(&attr);
3439 	if (evsel)
3440 		evsel->handler = trace__pgfault;
3441 
3442 	return evsel;
3443 }
3444 
3445 static void evlist__free_syscall_tp_fields(struct evlist *evlist)
3446 {
3447 	struct evsel *evsel;
3448 
3449 	evlist__for_each_entry(evlist, evsel) {
3450 		evsel_trace__delete(evsel->priv);
3451 		evsel->priv = NULL;
3452 	}
3453 }
3454 
3455 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample)
3456 {
3457 	const u32 type = event->header.type;
3458 	struct evsel *evsel;
3459 
3460 	if (type != PERF_RECORD_SAMPLE) {
3461 		trace__process_event(trace, trace->host, event, sample);
3462 		return;
3463 	}
3464 
3465 	evsel = evlist__id2evsel(trace->evlist, sample->id);
3466 	if (evsel == NULL) {
3467 		fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id);
3468 		return;
3469 	}
3470 
3471 	if (evswitch__discard(&trace->evswitch, evsel))
3472 		return;
3473 
3474 	trace__set_base_time(trace, evsel, sample);
3475 
3476 	if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT &&
3477 	    sample->raw_data == NULL) {
3478 		fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
3479 		       evsel__name(evsel), sample->tid,
3480 		       sample->cpu, sample->raw_size);
3481 	} else {
3482 		tracepoint_handler handler = evsel->handler;
3483 		handler(trace, evsel, event, sample);
3484 	}
3485 
3486 	if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX)
3487 		interrupted = true;
3488 }
3489 
3490 static int trace__add_syscall_newtp(struct trace *trace)
3491 {
3492 	int ret = -1;
3493 	struct evlist *evlist = trace->evlist;
3494 	struct evsel *sys_enter, *sys_exit;
3495 
3496 	sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter);
3497 	if (sys_enter == NULL)
3498 		goto out;
3499 
3500 	if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args))
3501 		goto out_delete_sys_enter;
3502 
3503 	sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit);
3504 	if (sys_exit == NULL)
3505 		goto out_delete_sys_enter;
3506 
3507 	if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret))
3508 		goto out_delete_sys_exit;
3509 
3510 	evsel__config_callchain(sys_enter, &trace->opts, &callchain_param);
3511 	evsel__config_callchain(sys_exit, &trace->opts, &callchain_param);
3512 
3513 	evlist__add(evlist, sys_enter);
3514 	evlist__add(evlist, sys_exit);
3515 
3516 	if (callchain_param.enabled && !trace->kernel_syscallchains) {
3517 		/*
3518 		 * We're interested only in the user space callchain
3519 		 * leading to the syscall, allow overriding that for
3520 		 * debugging reasons using --kernel_syscall_callchains
3521 		 */
3522 		sys_exit->core.attr.exclude_callchain_kernel = 1;
3523 	}
3524 
3525 	trace->syscalls.events.sys_enter = sys_enter;
3526 	trace->syscalls.events.sys_exit  = sys_exit;
3527 
3528 	ret = 0;
3529 out:
3530 	return ret;
3531 
3532 out_delete_sys_exit:
3533 	evsel__delete_priv(sys_exit);
3534 out_delete_sys_enter:
3535 	evsel__delete_priv(sys_enter);
3536 	goto out;
3537 }
3538 
3539 static int trace__set_ev_qualifier_tp_filter(struct trace *trace)
3540 {
3541 	int err = -1;
3542 	struct evsel *sys_exit;
3543 	char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier,
3544 						trace->ev_qualifier_ids.nr,
3545 						trace->ev_qualifier_ids.entries);
3546 
3547 	if (filter == NULL)
3548 		goto out_enomem;
3549 
3550 	if (!evsel__append_tp_filter(trace->syscalls.events.sys_enter, filter)) {
3551 		sys_exit = trace->syscalls.events.sys_exit;
3552 		err = evsel__append_tp_filter(sys_exit, filter);
3553 	}
3554 
3555 	free(filter);
3556 out:
3557 	return err;
3558 out_enomem:
3559 	errno = ENOMEM;
3560 	goto out;
3561 }
3562 
3563 #ifdef HAVE_BPF_SKEL
3564 static int syscall_arg_fmt__cache_btf_struct(struct syscall_arg_fmt *arg_fmt, struct btf *btf, char *type)
3565 {
3566        int id;
3567 
3568 	if (arg_fmt->type != NULL)
3569 		return -1;
3570 
3571        id = btf__find_by_name(btf, type);
3572        if (id < 0)
3573 		return -1;
3574 
3575        arg_fmt->type    = btf__type_by_id(btf, id);
3576        arg_fmt->type_id = id;
3577 
3578        return 0;
3579 }
3580 
3581 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name)
3582 {
3583 	struct bpf_program *pos, *prog = NULL;
3584 	const char *sec_name;
3585 
3586 	if (trace->skel->obj == NULL)
3587 		return NULL;
3588 
3589 	bpf_object__for_each_program(pos, trace->skel->obj) {
3590 		sec_name = bpf_program__section_name(pos);
3591 		if (sec_name && !strcmp(sec_name, name)) {
3592 			prog = pos;
3593 			break;
3594 		}
3595 	}
3596 
3597 	return prog;
3598 }
3599 
3600 static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc,
3601 							const char *prog_name, const char *type)
3602 {
3603 	struct bpf_program *prog;
3604 
3605 	if (prog_name == NULL) {
3606 		char default_prog_name[256];
3607 		scnprintf(default_prog_name, sizeof(default_prog_name), "tp/syscalls/sys_%s_%s", type, sc->name);
3608 		prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3609 		if (prog != NULL)
3610 			goto out_found;
3611 		if (sc->fmt && sc->fmt->alias) {
3612 			scnprintf(default_prog_name, sizeof(default_prog_name), "tp/syscalls/sys_%s_%s", type, sc->fmt->alias);
3613 			prog = trace__find_bpf_program_by_title(trace, default_prog_name);
3614 			if (prog != NULL)
3615 				goto out_found;
3616 		}
3617 		goto out_unaugmented;
3618 	}
3619 
3620 	prog = trace__find_bpf_program_by_title(trace, prog_name);
3621 
3622 	if (prog != NULL) {
3623 out_found:
3624 		return prog;
3625 	}
3626 
3627 	pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n",
3628 		 prog_name, type, sc->name);
3629 out_unaugmented:
3630 	return trace->skel->progs.syscall_unaugmented;
3631 }
3632 
3633 static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
3634 {
3635 	struct syscall *sc = trace__syscall_info(trace, NULL, id);
3636 
3637 	if (sc == NULL)
3638 		return;
3639 
3640 	sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3641 	sc->bpf_prog.sys_exit  = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit  : NULL,  "exit");
3642 }
3643 
3644 static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id)
3645 {
3646 	struct syscall *sc = trace__syscall_info(trace, NULL, id);
3647 	return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->skel->progs.syscall_unaugmented);
3648 }
3649 
3650 static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id)
3651 {
3652 	struct syscall *sc = trace__syscall_info(trace, NULL, id);
3653 	return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->skel->progs.syscall_unaugmented);
3654 }
3655 
3656 static int trace__bpf_sys_enter_beauty_map(struct trace *trace, int key, unsigned int *beauty_array)
3657 {
3658 	struct tep_format_field *field;
3659 	struct syscall *sc = trace__syscall_info(trace, NULL, key);
3660 	const struct btf_type *bt;
3661 	char *struct_offset, *tmp, name[32];
3662 	bool can_augment = false;
3663 	int i, cnt;
3664 
3665 	if (sc == NULL)
3666 		return -1;
3667 
3668 	trace__load_vmlinux_btf(trace);
3669 	if (trace->btf == NULL)
3670 		return -1;
3671 
3672 	for (i = 0, field = sc->args; field; ++i, field = field->next) {
3673 		// XXX We're only collecting pointer payloads _from_ user space
3674 		if (!sc->arg_fmt[i].from_user)
3675 			continue;
3676 
3677 		struct_offset = strstr(field->type, "struct ");
3678 		if (struct_offset == NULL)
3679 			struct_offset = strstr(field->type, "union ");
3680 		else
3681 			struct_offset++; // "union" is shorter
3682 
3683 		if (field->flags & TEP_FIELD_IS_POINTER && struct_offset) { /* struct or union (think BPF's attr arg) */
3684 			struct_offset += 6;
3685 
3686 			/* for 'struct foo *', we only want 'foo' */
3687 			for (tmp = struct_offset, cnt = 0; *tmp != ' ' && *tmp != '\0'; ++tmp, ++cnt) {
3688 			}
3689 
3690 			strncpy(name, struct_offset, cnt);
3691 			name[cnt] = '\0';
3692 
3693 			/* cache struct's btf_type and type_id */
3694 			if (syscall_arg_fmt__cache_btf_struct(&sc->arg_fmt[i], trace->btf, name))
3695 				continue;
3696 
3697 			bt = sc->arg_fmt[i].type;
3698 			beauty_array[i] = bt->size;
3699 			can_augment = true;
3700 		} else if (field->flags & TEP_FIELD_IS_POINTER && /* string */
3701 			   strcmp(field->type, "const char *") == 0 &&
3702 			   (strstr(field->name, "name") ||
3703 			    strstr(field->name, "path") ||
3704 			    strstr(field->name, "file") ||
3705 			    strstr(field->name, "root") ||
3706 			    strstr(field->name, "key") ||
3707 			    strstr(field->name, "special") ||
3708 			    strstr(field->name, "type") ||
3709 			    strstr(field->name, "description"))) {
3710 			beauty_array[i] = 1;
3711 			can_augment = true;
3712 		} else if (field->flags & TEP_FIELD_IS_POINTER && /* buffer */
3713 			   strstr(field->type, "char *") &&
3714 			   (strstr(field->name, "buf") ||
3715 			    strstr(field->name, "val") ||
3716 			    strstr(field->name, "msg"))) {
3717 			int j;
3718 			struct tep_format_field *field_tmp;
3719 
3720 			/* find the size of the buffer that appears in pairs with buf */
3721 			for (j = 0, field_tmp = sc->args; field_tmp; ++j, field_tmp = field_tmp->next) {
3722 				if (!(field_tmp->flags & TEP_FIELD_IS_POINTER) && /* only integers */
3723 				    (strstr(field_tmp->name, "count") ||
3724 				     strstr(field_tmp->name, "siz") ||  /* size, bufsiz */
3725 				     (strstr(field_tmp->name, "len") && strcmp(field_tmp->name, "filename")))) {
3726 					 /* filename's got 'len' in it, we don't want that */
3727 					beauty_array[i] = -(j + 1);
3728 					can_augment = true;
3729 					break;
3730 				}
3731 			}
3732 		}
3733 	}
3734 
3735 	if (can_augment)
3736 		return 0;
3737 
3738 	return -1;
3739 }
3740 
3741 static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc)
3742 {
3743 	struct tep_format_field *field, *candidate_field;
3744 	/*
3745 	 * We're only interested in syscalls that have a pointer:
3746 	 */
3747 	for (field = sc->args; field; field = field->next) {
3748 		if (field->flags & TEP_FIELD_IS_POINTER)
3749 			goto try_to_find_pair;
3750 	}
3751 
3752 	return NULL;
3753 
3754 try_to_find_pair:
3755 	for (int i = 0; i < trace->sctbl->syscalls.nr_entries; ++i) {
3756 		int id = syscalltbl__id_at_idx(trace->sctbl, i);
3757 		struct syscall *pair = trace__syscall_info(trace, NULL, id);
3758 		struct bpf_program *pair_prog;
3759 		bool is_candidate = false;
3760 
3761 		if (pair == NULL || pair == sc ||
3762 		    pair->bpf_prog.sys_enter == trace->skel->progs.syscall_unaugmented)
3763 			continue;
3764 
3765 		for (field = sc->args, candidate_field = pair->args;
3766 		     field && candidate_field; field = field->next, candidate_field = candidate_field->next) {
3767 			bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
3768 			     candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER;
3769 
3770 			if (is_pointer) {
3771 			       if (!candidate_is_pointer) {
3772 					// The candidate just doesn't copies our pointer arg, might copy other pointers we want.
3773 					continue;
3774 			       }
3775 			} else {
3776 				if (candidate_is_pointer) {
3777 					// The candidate might copy a pointer we don't have, skip it.
3778 					goto next_candidate;
3779 				}
3780 				continue;
3781 			}
3782 
3783 			if (strcmp(field->type, candidate_field->type))
3784 				goto next_candidate;
3785 
3786 			/*
3787 			 * This is limited in the BPF program but sys_write
3788 			 * uses "const char *" for its "buf" arg so we need to
3789 			 * use some heuristic that is kinda future proof...
3790 			 */
3791 			if (strcmp(field->type, "const char *") == 0 &&
3792 			    !(strstr(field->name, "name") ||
3793 			      strstr(field->name, "path") ||
3794 			      strstr(field->name, "file") ||
3795 			      strstr(field->name, "root") ||
3796 			      strstr(field->name, "description")))
3797 				goto next_candidate;
3798 
3799 			is_candidate = true;
3800 		}
3801 
3802 		if (!is_candidate)
3803 			goto next_candidate;
3804 
3805 		/*
3806 		 * Check if the tentative pair syscall augmenter has more pointers, if it has,
3807 		 * then it may be collecting that and we then can't use it, as it would collect
3808 		 * more than what is common to the two syscalls.
3809 		 */
3810 		if (candidate_field) {
3811 			for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next)
3812 				if (candidate_field->flags & TEP_FIELD_IS_POINTER)
3813 					goto next_candidate;
3814 		}
3815 
3816 		pair_prog = pair->bpf_prog.sys_enter;
3817 		/*
3818 		 * If the pair isn't enabled, then its bpf_prog.sys_enter will not
3819 		 * have been searched for, so search it here and if it returns the
3820 		 * unaugmented one, then ignore it, otherwise we'll reuse that BPF
3821 		 * program for a filtered syscall on a non-filtered one.
3822 		 *
3823 		 * For instance, we have "!syscalls:sys_enter_renameat" and that is
3824 		 * useful for "renameat2".
3825 		 */
3826 		if (pair_prog == NULL) {
3827 			pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter");
3828 			if (pair_prog == trace->skel->progs.syscall_unaugmented)
3829 				goto next_candidate;
3830 		}
3831 
3832 		pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name);
3833 		return pair_prog;
3834 	next_candidate:
3835 		continue;
3836 	}
3837 
3838 	return NULL;
3839 }
3840 
3841 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
3842 {
3843 	int map_enter_fd = bpf_map__fd(trace->skel->maps.syscalls_sys_enter);
3844 	int map_exit_fd  = bpf_map__fd(trace->skel->maps.syscalls_sys_exit);
3845 	int beauty_map_fd = bpf_map__fd(trace->skel->maps.beauty_map_enter);
3846 	int err = 0;
3847 	unsigned int beauty_array[6];
3848 
3849 	for (int i = 0; i < trace->sctbl->syscalls.nr_entries; ++i) {
3850 		int prog_fd, key = syscalltbl__id_at_idx(trace->sctbl, i);
3851 
3852 		if (!trace__syscall_enabled(trace, key))
3853 			continue;
3854 
3855 		trace__init_syscall_bpf_progs(trace, key);
3856 
3857 		// It'll get at least the "!raw_syscalls:unaugmented"
3858 		prog_fd = trace__bpf_prog_sys_enter_fd(trace, key);
3859 		err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3860 		if (err)
3861 			break;
3862 		prog_fd = trace__bpf_prog_sys_exit_fd(trace, key);
3863 		err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY);
3864 		if (err)
3865 			break;
3866 
3867 		/* use beauty_map to tell BPF how many bytes to collect, set beauty_map's value here */
3868 		memset(beauty_array, 0, sizeof(beauty_array));
3869 		err = trace__bpf_sys_enter_beauty_map(trace, key, (unsigned int *)beauty_array);
3870 		if (err)
3871 			continue;
3872 		err = bpf_map_update_elem(beauty_map_fd, &key, beauty_array, BPF_ANY);
3873 		if (err)
3874 			break;
3875 	}
3876 
3877 	/*
3878 	 * Now lets do a second pass looking for enabled syscalls without
3879 	 * an augmenter that have a signature that is a superset of another
3880 	 * syscall with an augmenter so that we can auto-reuse it.
3881 	 *
3882 	 * I.e. if we have an augmenter for the "open" syscall that has
3883 	 * this signature:
3884 	 *
3885 	 *   int open(const char *pathname, int flags, mode_t mode);
3886 	 *
3887 	 * I.e. that will collect just the first string argument, then we
3888 	 * can reuse it for the 'creat' syscall, that has this signature:
3889 	 *
3890 	 *   int creat(const char *pathname, mode_t mode);
3891 	 *
3892 	 * and for:
3893 	 *
3894 	 *   int stat(const char *pathname, struct stat *statbuf);
3895 	 *   int lstat(const char *pathname, struct stat *statbuf);
3896 	 *
3897 	 * Because the 'open' augmenter will collect the first arg as a string,
3898 	 * and leave alone all the other args, which already helps with
3899 	 * beautifying 'stat' and 'lstat''s pathname arg.
3900 	 *
3901 	 * Then, in time, when 'stat' gets an augmenter that collects both
3902 	 * first and second arg (this one on the raw_syscalls:sys_exit prog
3903 	 * array tail call, then that one will be used.
3904 	 */
3905 	for (int i = 0; i < trace->sctbl->syscalls.nr_entries; ++i) {
3906 		int key = syscalltbl__id_at_idx(trace->sctbl, i);
3907 		struct syscall *sc = trace__syscall_info(trace, NULL, key);
3908 		struct bpf_program *pair_prog;
3909 		int prog_fd;
3910 
3911 		if (sc == NULL || sc->bpf_prog.sys_enter == NULL)
3912 			continue;
3913 
3914 		/*
3915 		 * For now we're just reusing the sys_enter prog, and if it
3916 		 * already has an augmenter, we don't need to find one.
3917 		 */
3918 		if (sc->bpf_prog.sys_enter != trace->skel->progs.syscall_unaugmented)
3919 			continue;
3920 
3921 		/*
3922 		 * Look at all the other syscalls for one that has a signature
3923 		 * that is close enough that we can share:
3924 		 */
3925 		pair_prog = trace__find_usable_bpf_prog_entry(trace, sc);
3926 		if (pair_prog == NULL)
3927 			continue;
3928 
3929 		sc->bpf_prog.sys_enter = pair_prog;
3930 
3931 		/*
3932 		 * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter
3933 		 * with the fd for the program we're reusing:
3934 		 */
3935 		prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter);
3936 		err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
3937 		if (err)
3938 			break;
3939 	}
3940 
3941 	return err;
3942 }
3943 #endif // HAVE_BPF_SKEL
3944 
3945 static int trace__set_ev_qualifier_filter(struct trace *trace)
3946 {
3947 	if (trace->syscalls.events.sys_enter)
3948 		return trace__set_ev_qualifier_tp_filter(trace);
3949 	return 0;
3950 }
3951 
3952 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused,
3953 				    size_t npids __maybe_unused, pid_t *pids __maybe_unused)
3954 {
3955 	int err = 0;
3956 #ifdef HAVE_LIBBPF_SUPPORT
3957 	bool value = true;
3958 	int map_fd = bpf_map__fd(map);
3959 	size_t i;
3960 
3961 	for (i = 0; i < npids; ++i) {
3962 		err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY);
3963 		if (err)
3964 			break;
3965 	}
3966 #endif
3967 	return err;
3968 }
3969 
3970 static int trace__set_filter_loop_pids(struct trace *trace)
3971 {
3972 	unsigned int nr = 1, err;
3973 	pid_t pids[32] = {
3974 		getpid(),
3975 	};
3976 	struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]);
3977 
3978 	while (thread && nr < ARRAY_SIZE(pids)) {
3979 		struct thread *parent = machine__find_thread(trace->host,
3980 							     thread__ppid(thread),
3981 							     thread__ppid(thread));
3982 
3983 		if (parent == NULL)
3984 			break;
3985 
3986 		if (!strcmp(thread__comm_str(parent), "sshd") ||
3987 		    strstarts(thread__comm_str(parent), "gnome-terminal")) {
3988 			pids[nr++] = thread__tid(parent);
3989 			break;
3990 		}
3991 		thread = parent;
3992 	}
3993 
3994 	err = evlist__append_tp_filter_pids(trace->evlist, nr, pids);
3995 	if (!err && trace->filter_pids.map)
3996 		err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids);
3997 
3998 	return err;
3999 }
4000 
4001 static int trace__set_filter_pids(struct trace *trace)
4002 {
4003 	int err = 0;
4004 	/*
4005 	 * Better not use !target__has_task() here because we need to cover the
4006 	 * case where no threads were specified in the command line, but a
4007 	 * workload was, and in that case we will fill in the thread_map when
4008 	 * we fork the workload in evlist__prepare_workload.
4009 	 */
4010 	if (trace->filter_pids.nr > 0) {
4011 		err = evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr,
4012 						    trace->filter_pids.entries);
4013 		if (!err && trace->filter_pids.map) {
4014 			err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr,
4015 						       trace->filter_pids.entries);
4016 		}
4017 	} else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) {
4018 		err = trace__set_filter_loop_pids(trace);
4019 	}
4020 
4021 	return err;
4022 }
4023 
4024 static int __trace__deliver_event(struct trace *trace, union perf_event *event)
4025 {
4026 	struct evlist *evlist = trace->evlist;
4027 	struct perf_sample sample;
4028 	int err = evlist__parse_sample(evlist, event, &sample);
4029 
4030 	if (err)
4031 		fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
4032 	else
4033 		trace__handle_event(trace, event, &sample);
4034 
4035 	return 0;
4036 }
4037 
4038 static int __trace__flush_events(struct trace *trace)
4039 {
4040 	u64 first = ordered_events__first_time(&trace->oe.data);
4041 	u64 flush = trace->oe.last - NSEC_PER_SEC;
4042 
4043 	/* Is there some thing to flush.. */
4044 	if (first && first < flush)
4045 		return ordered_events__flush_time(&trace->oe.data, flush);
4046 
4047 	return 0;
4048 }
4049 
4050 static int trace__flush_events(struct trace *trace)
4051 {
4052 	return !trace->sort_events ? 0 : __trace__flush_events(trace);
4053 }
4054 
4055 static int trace__deliver_event(struct trace *trace, union perf_event *event)
4056 {
4057 	int err;
4058 
4059 	if (!trace->sort_events)
4060 		return __trace__deliver_event(trace, event);
4061 
4062 	err = evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last);
4063 	if (err && err != -1)
4064 		return err;
4065 
4066 	err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0, NULL);
4067 	if (err)
4068 		return err;
4069 
4070 	return trace__flush_events(trace);
4071 }
4072 
4073 static int ordered_events__deliver_event(struct ordered_events *oe,
4074 					 struct ordered_event *event)
4075 {
4076 	struct trace *trace = container_of(oe, struct trace, oe.data);
4077 
4078 	return __trace__deliver_event(trace, event->event);
4079 }
4080 
4081 static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg,
4082 								   char **type)
4083 {
4084 	struct tep_format_field *field;
4085 	struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel);
4086 
4087 	if (evsel->tp_format == NULL || fmt == NULL)
4088 		return NULL;
4089 
4090 	for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt)
4091 		if (strcmp(field->name, arg) == 0) {
4092 			*type = field->type;
4093 			return fmt;
4094 		}
4095 
4096 	return NULL;
4097 }
4098 
4099 static int trace__expand_filter(struct trace *trace, struct evsel *evsel)
4100 {
4101 	char *tok, *left = evsel->filter, *new_filter = evsel->filter;
4102 
4103 	while ((tok = strpbrk(left, "=<>!")) != NULL) {
4104 		char *right = tok + 1, *right_end;
4105 
4106 		if (*right == '=')
4107 			++right;
4108 
4109 		while (isspace(*right))
4110 			++right;
4111 
4112 		if (*right == '\0')
4113 			break;
4114 
4115 		while (!isalpha(*left))
4116 			if (++left == tok) {
4117 				/*
4118 				 * Bail out, can't find the name of the argument that is being
4119 				 * used in the filter, let it try to set this filter, will fail later.
4120 				 */
4121 				return 0;
4122 			}
4123 
4124 		right_end = right + 1;
4125 		while (isalnum(*right_end) || *right_end == '_' || *right_end == '|')
4126 			++right_end;
4127 
4128 		if (isalpha(*right)) {
4129 			struct syscall_arg_fmt *fmt;
4130 			int left_size = tok - left,
4131 			    right_size = right_end - right;
4132 			char arg[128], *type;
4133 
4134 			while (isspace(left[left_size - 1]))
4135 				--left_size;
4136 
4137 			scnprintf(arg, sizeof(arg), "%.*s", left_size, left);
4138 
4139 			fmt = evsel__find_syscall_arg_fmt_by_name(evsel, arg, &type);
4140 			if (fmt == NULL) {
4141 				pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n",
4142 				       arg, evsel->name, evsel->filter);
4143 				return -1;
4144 			}
4145 
4146 			pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ",
4147 				 arg, (int)(right - tok), tok, right_size, right);
4148 
4149 			if (fmt->strtoul) {
4150 				u64 val;
4151 				struct syscall_arg syscall_arg = {
4152 					.trace = trace,
4153 					.fmt   = fmt,
4154 					.type_name = type,
4155 					.parm = fmt->parm,
4156 				};
4157 
4158 				if (fmt->strtoul(right, right_size, &syscall_arg, &val)) {
4159 					char *n, expansion[19];
4160 					int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val);
4161 					int expansion_offset = right - new_filter;
4162 
4163 					pr_debug("%s", expansion);
4164 
4165 					if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) {
4166 						pr_debug(" out of memory!\n");
4167 						free(new_filter);
4168 						return -1;
4169 					}
4170 					if (new_filter != evsel->filter)
4171 						free(new_filter);
4172 					left = n + expansion_offset + expansion_lenght;
4173 					new_filter = n;
4174 				} else {
4175 					pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n",
4176 					       right_size, right, arg, evsel->name, evsel->filter);
4177 					return -1;
4178 				}
4179 			} else {
4180 				pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n",
4181 				       arg, evsel->name, evsel->filter);
4182 				return -1;
4183 			}
4184 
4185 			pr_debug("\n");
4186 		} else {
4187 			left = right_end;
4188 		}
4189 	}
4190 
4191 	if (new_filter != evsel->filter) {
4192 		pr_debug("New filter for %s: %s\n", evsel->name, new_filter);
4193 		evsel__set_filter(evsel, new_filter);
4194 		free(new_filter);
4195 	}
4196 
4197 	return 0;
4198 }
4199 
4200 static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel)
4201 {
4202 	struct evlist *evlist = trace->evlist;
4203 	struct evsel *evsel;
4204 
4205 	evlist__for_each_entry(evlist, evsel) {
4206 		if (evsel->filter == NULL)
4207 			continue;
4208 
4209 		if (trace__expand_filter(trace, evsel)) {
4210 			*err_evsel = evsel;
4211 			return -1;
4212 		}
4213 	}
4214 
4215 	return 0;
4216 }
4217 
4218 static int trace__run(struct trace *trace, int argc, const char **argv)
4219 {
4220 	struct evlist *evlist = trace->evlist;
4221 	struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL;
4222 	int err = -1, i;
4223 	unsigned long before;
4224 	const bool forks = argc > 0;
4225 	bool draining = false;
4226 
4227 	trace->live = true;
4228 
4229 	if (!trace->raw_augmented_syscalls) {
4230 		if (trace->trace_syscalls && trace__add_syscall_newtp(trace))
4231 			goto out_error_raw_syscalls;
4232 
4233 		if (trace->trace_syscalls)
4234 			trace->vfs_getname = evlist__add_vfs_getname(evlist);
4235 	}
4236 
4237 	if ((trace->trace_pgfaults & TRACE_PFMAJ)) {
4238 		pgfault_maj = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ);
4239 		if (pgfault_maj == NULL)
4240 			goto out_error_mem;
4241 		evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
4242 		evlist__add(evlist, pgfault_maj);
4243 	}
4244 
4245 	if ((trace->trace_pgfaults & TRACE_PFMIN)) {
4246 		pgfault_min = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN);
4247 		if (pgfault_min == NULL)
4248 			goto out_error_mem;
4249 		evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
4250 		evlist__add(evlist, pgfault_min);
4251 	}
4252 
4253 	/* Enable ignoring missing threads when -u/-p option is defined. */
4254 	trace->opts.ignore_missing_thread = trace->opts.target.uid != UINT_MAX || trace->opts.target.pid;
4255 
4256 	if (trace->sched &&
4257 	    evlist__add_newtp(evlist, "sched", "sched_stat_runtime", trace__sched_stat_runtime))
4258 		goto out_error_sched_stat_runtime;
4259 	/*
4260 	 * If a global cgroup was set, apply it to all the events without an
4261 	 * explicit cgroup. I.e.:
4262 	 *
4263 	 * 	trace -G A -e sched:*switch
4264 	 *
4265 	 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc
4266 	 * _and_ sched:sched_switch to the 'A' cgroup, while:
4267 	 *
4268 	 * trace -e sched:*switch -G A
4269 	 *
4270 	 * will only set the sched:sched_switch event to the 'A' cgroup, all the
4271 	 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without"
4272 	 * a cgroup (on the root cgroup, sys wide, etc).
4273 	 *
4274 	 * Multiple cgroups:
4275 	 *
4276 	 * trace -G A -e sched:*switch -G B
4277 	 *
4278 	 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes
4279 	 * to the 'B' cgroup.
4280 	 *
4281 	 * evlist__set_default_cgroup() grabs a reference of the passed cgroup
4282 	 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL.
4283 	 */
4284 	if (trace->cgroup)
4285 		evlist__set_default_cgroup(trace->evlist, trace->cgroup);
4286 
4287 	err = evlist__create_maps(evlist, &trace->opts.target);
4288 	if (err < 0) {
4289 		fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
4290 		goto out_delete_evlist;
4291 	}
4292 
4293 	err = trace__symbols_init(trace, evlist);
4294 	if (err < 0) {
4295 		fprintf(trace->output, "Problems initializing symbol libraries!\n");
4296 		goto out_delete_evlist;
4297 	}
4298 
4299 	evlist__config(evlist, &trace->opts, &callchain_param);
4300 
4301 	if (forks) {
4302 		err = evlist__prepare_workload(evlist, &trace->opts.target, argv, false, NULL);
4303 		if (err < 0) {
4304 			fprintf(trace->output, "Couldn't run the workload!\n");
4305 			goto out_delete_evlist;
4306 		}
4307 		workload_pid = evlist->workload.pid;
4308 	}
4309 
4310 	err = evlist__open(evlist);
4311 	if (err < 0)
4312 		goto out_error_open;
4313 #ifdef HAVE_BPF_SKEL
4314 	if (trace->syscalls.events.bpf_output) {
4315 		struct perf_cpu cpu;
4316 
4317 		/*
4318 		 * Set up the __augmented_syscalls__ BPF map to hold for each
4319 		 * CPU the bpf-output event's file descriptor.
4320 		 */
4321 		perf_cpu_map__for_each_cpu(cpu, i, trace->syscalls.events.bpf_output->core.cpus) {
4322 			bpf_map__update_elem(trace->skel->maps.__augmented_syscalls__,
4323 					&cpu.cpu, sizeof(int),
4324 					xyarray__entry(trace->syscalls.events.bpf_output->core.fd,
4325 						       cpu.cpu, 0),
4326 					sizeof(__u32), BPF_ANY);
4327 		}
4328 	}
4329 #endif
4330 	err = trace__set_filter_pids(trace);
4331 	if (err < 0)
4332 		goto out_error_mem;
4333 
4334 #ifdef HAVE_BPF_SKEL
4335 	if (trace->skel && trace->skel->progs.sys_enter)
4336 		trace__init_syscalls_bpf_prog_array_maps(trace);
4337 #endif
4338 
4339 	if (trace->ev_qualifier_ids.nr > 0) {
4340 		err = trace__set_ev_qualifier_filter(trace);
4341 		if (err < 0)
4342 			goto out_errno;
4343 
4344 		if (trace->syscalls.events.sys_exit) {
4345 			pr_debug("event qualifier tracepoint filter: %s\n",
4346 				 trace->syscalls.events.sys_exit->filter);
4347 		}
4348 	}
4349 
4350 	/*
4351 	 * If the "close" syscall is not traced, then we will not have the
4352 	 * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the
4353 	 * fd->pathname table and were ending up showing the last value set by
4354 	 * syscalls opening a pathname and associating it with a descriptor or
4355 	 * reading it from /proc/pid/fd/ in cases where that doesn't make
4356 	 * sense.
4357 	 *
4358 	 *  So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is
4359 	 *  not in use.
4360 	 */
4361 	trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close"));
4362 
4363 	err = trace__expand_filters(trace, &evsel);
4364 	if (err)
4365 		goto out_delete_evlist;
4366 	err = evlist__apply_filters(evlist, &evsel, &trace->opts.target);
4367 	if (err < 0)
4368 		goto out_error_apply_filters;
4369 
4370 	err = evlist__mmap(evlist, trace->opts.mmap_pages);
4371 	if (err < 0)
4372 		goto out_error_mmap;
4373 
4374 	if (!target__none(&trace->opts.target) && !trace->opts.target.initial_delay)
4375 		evlist__enable(evlist);
4376 
4377 	if (forks)
4378 		evlist__start_workload(evlist);
4379 
4380 	if (trace->opts.target.initial_delay) {
4381 		usleep(trace->opts.target.initial_delay * 1000);
4382 		evlist__enable(evlist);
4383 	}
4384 
4385 	trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 ||
4386 		perf_thread_map__nr(evlist->core.threads) > 1 ||
4387 		evlist__first(evlist)->core.attr.inherit;
4388 
4389 	/*
4390 	 * Now that we already used evsel->core.attr to ask the kernel to setup the
4391 	 * events, lets reuse evsel->core.attr.sample_max_stack as the limit in
4392 	 * trace__resolve_callchain(), allowing per-event max-stack settings
4393 	 * to override an explicitly set --max-stack global setting.
4394 	 */
4395 	evlist__for_each_entry(evlist, evsel) {
4396 		if (evsel__has_callchain(evsel) &&
4397 		    evsel->core.attr.sample_max_stack == 0)
4398 			evsel->core.attr.sample_max_stack = trace->max_stack;
4399 	}
4400 again:
4401 	before = trace->nr_events;
4402 
4403 	for (i = 0; i < evlist->core.nr_mmaps; i++) {
4404 		union perf_event *event;
4405 		struct mmap *md;
4406 
4407 		md = &evlist->mmap[i];
4408 		if (perf_mmap__read_init(&md->core) < 0)
4409 			continue;
4410 
4411 		while ((event = perf_mmap__read_event(&md->core)) != NULL) {
4412 			++trace->nr_events;
4413 
4414 			err = trace__deliver_event(trace, event);
4415 			if (err)
4416 				goto out_disable;
4417 
4418 			perf_mmap__consume(&md->core);
4419 
4420 			if (interrupted)
4421 				goto out_disable;
4422 
4423 			if (done && !draining) {
4424 				evlist__disable(evlist);
4425 				draining = true;
4426 			}
4427 		}
4428 		perf_mmap__read_done(&md->core);
4429 	}
4430 
4431 	if (trace->nr_events == before) {
4432 		int timeout = done ? 100 : -1;
4433 
4434 		if (!draining && evlist__poll(evlist, timeout) > 0) {
4435 			if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0)
4436 				draining = true;
4437 
4438 			goto again;
4439 		} else {
4440 			if (trace__flush_events(trace))
4441 				goto out_disable;
4442 		}
4443 	} else {
4444 		goto again;
4445 	}
4446 
4447 out_disable:
4448 	thread__zput(trace->current);
4449 
4450 	evlist__disable(evlist);
4451 
4452 	if (trace->sort_events)
4453 		ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL);
4454 
4455 	if (!err) {
4456 		if (trace->summary)
4457 			trace__fprintf_thread_summary(trace, trace->output);
4458 
4459 		if (trace->show_tool_stats) {
4460 			fprintf(trace->output, "Stats:\n "
4461 					       " vfs_getname : %" PRIu64 "\n"
4462 					       " proc_getname: %" PRIu64 "\n",
4463 				trace->stats.vfs_getname,
4464 				trace->stats.proc_getname);
4465 		}
4466 	}
4467 
4468 out_delete_evlist:
4469 	trace__symbols__exit(trace);
4470 	evlist__free_syscall_tp_fields(evlist);
4471 	evlist__delete(evlist);
4472 	cgroup__put(trace->cgroup);
4473 	trace->evlist = NULL;
4474 	trace->live = false;
4475 	return err;
4476 {
4477 	char errbuf[BUFSIZ];
4478 
4479 out_error_sched_stat_runtime:
4480 	tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime");
4481 	goto out_error;
4482 
4483 out_error_raw_syscalls:
4484 	tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)");
4485 	goto out_error;
4486 
4487 out_error_mmap:
4488 	evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf));
4489 	goto out_error;
4490 
4491 out_error_open:
4492 	evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
4493 
4494 out_error:
4495 	fprintf(trace->output, "%s\n", errbuf);
4496 	goto out_delete_evlist;
4497 
4498 out_error_apply_filters:
4499 	fprintf(trace->output,
4500 		"Failed to set filter \"%s\" on event %s with %d (%s)\n",
4501 		evsel->filter, evsel__name(evsel), errno,
4502 		str_error_r(errno, errbuf, sizeof(errbuf)));
4503 	goto out_delete_evlist;
4504 }
4505 out_error_mem:
4506 	fprintf(trace->output, "Not enough memory to run!\n");
4507 	goto out_delete_evlist;
4508 
4509 out_errno:
4510 	fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno));
4511 	goto out_delete_evlist;
4512 }
4513 
4514 static int trace__replay(struct trace *trace)
4515 {
4516 	const struct evsel_str_handler handlers[] = {
4517 		{ "probe:vfs_getname",	     trace__vfs_getname, },
4518 	};
4519 	struct perf_data data = {
4520 		.path  = input_name,
4521 		.mode  = PERF_DATA_MODE_READ,
4522 		.force = trace->force,
4523 	};
4524 	struct perf_session *session;
4525 	struct evsel *evsel;
4526 	int err = -1;
4527 
4528 	trace->tool.sample	  = trace__process_sample;
4529 	trace->tool.mmap	  = perf_event__process_mmap;
4530 	trace->tool.mmap2	  = perf_event__process_mmap2;
4531 	trace->tool.comm	  = perf_event__process_comm;
4532 	trace->tool.exit	  = perf_event__process_exit;
4533 	trace->tool.fork	  = perf_event__process_fork;
4534 	trace->tool.attr	  = perf_event__process_attr;
4535 	trace->tool.tracing_data  = perf_event__process_tracing_data;
4536 	trace->tool.build_id	  = perf_event__process_build_id;
4537 	trace->tool.namespaces	  = perf_event__process_namespaces;
4538 
4539 	trace->tool.ordered_events = true;
4540 	trace->tool.ordering_requires_timestamps = true;
4541 
4542 	/* add tid to output */
4543 	trace->multiple_threads = true;
4544 
4545 	session = perf_session__new(&data, &trace->tool);
4546 	if (IS_ERR(session))
4547 		return PTR_ERR(session);
4548 
4549 	if (trace->opts.target.pid)
4550 		symbol_conf.pid_list_str = strdup(trace->opts.target.pid);
4551 
4552 	if (trace->opts.target.tid)
4553 		symbol_conf.tid_list_str = strdup(trace->opts.target.tid);
4554 
4555 	if (symbol__init(&session->header.env) < 0)
4556 		goto out;
4557 
4558 	trace->host = &session->machines.host;
4559 
4560 	err = perf_session__set_tracepoints_handlers(session, handlers);
4561 	if (err)
4562 		goto out;
4563 
4564 	evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_enter");
4565 	trace->syscalls.events.sys_enter = evsel;
4566 	/* older kernels have syscalls tp versus raw_syscalls */
4567 	if (evsel == NULL)
4568 		evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_enter");
4569 
4570 	if (evsel &&
4571 	    (evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 ||
4572 	    perf_evsel__init_sc_tp_ptr_field(evsel, args))) {
4573 		pr_err("Error during initialize raw_syscalls:sys_enter event\n");
4574 		goto out;
4575 	}
4576 
4577 	evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_exit");
4578 	trace->syscalls.events.sys_exit = evsel;
4579 	if (evsel == NULL)
4580 		evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_exit");
4581 	if (evsel &&
4582 	    (evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 ||
4583 	    perf_evsel__init_sc_tp_uint_field(evsel, ret))) {
4584 		pr_err("Error during initialize raw_syscalls:sys_exit event\n");
4585 		goto out;
4586 	}
4587 
4588 	evlist__for_each_entry(session->evlist, evsel) {
4589 		if (evsel->core.attr.type == PERF_TYPE_SOFTWARE &&
4590 		    (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ||
4591 		     evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
4592 		     evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS))
4593 			evsel->handler = trace__pgfault;
4594 	}
4595 
4596 	setup_pager();
4597 
4598 	err = perf_session__process_events(session);
4599 	if (err)
4600 		pr_err("Failed to process events, error %d", err);
4601 
4602 	else if (trace->summary)
4603 		trace__fprintf_thread_summary(trace, trace->output);
4604 
4605 out:
4606 	perf_session__delete(session);
4607 
4608 	return err;
4609 }
4610 
4611 static size_t trace__fprintf_threads_header(FILE *fp)
4612 {
4613 	size_t printed;
4614 
4615 	printed  = fprintf(fp, "\n Summary of events:\n\n");
4616 
4617 	return printed;
4618 }
4619 
4620 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs,
4621 	struct syscall_stats *stats;
4622 	double		     msecs;
4623 	int		     syscall;
4624 )
4625 {
4626 	struct int_node *source = rb_entry(nd, struct int_node, rb_node);
4627 	struct syscall_stats *stats = source->priv;
4628 
4629 	entry->syscall = source->i;
4630 	entry->stats   = stats;
4631 	entry->msecs   = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0;
4632 }
4633 
4634 static size_t thread__dump_stats(struct thread_trace *ttrace,
4635 				 struct trace *trace, FILE *fp)
4636 {
4637 	size_t printed = 0;
4638 	struct syscall *sc;
4639 	struct rb_node *nd;
4640 	DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats);
4641 
4642 	if (syscall_stats == NULL)
4643 		return 0;
4644 
4645 	printed += fprintf(fp, "\n");
4646 
4647 	printed += fprintf(fp, "   syscall            calls  errors  total       min       avg       max       stddev\n");
4648 	printed += fprintf(fp, "                                     (msec)    (msec)    (msec)    (msec)        (%%)\n");
4649 	printed += fprintf(fp, "   --------------- --------  ------ -------- --------- --------- ---------     ------\n");
4650 
4651 	resort_rb__for_each_entry(nd, syscall_stats) {
4652 		struct syscall_stats *stats = syscall_stats_entry->stats;
4653 		if (stats) {
4654 			double min = (double)(stats->stats.min) / NSEC_PER_MSEC;
4655 			double max = (double)(stats->stats.max) / NSEC_PER_MSEC;
4656 			double avg = avg_stats(&stats->stats);
4657 			double pct;
4658 			u64 n = (u64)stats->stats.n;
4659 
4660 			pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0;
4661 			avg /= NSEC_PER_MSEC;
4662 
4663 			sc = &trace->syscalls.table[syscall_stats_entry->syscall];
4664 			printed += fprintf(fp, "   %-15s", sc->name);
4665 			printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f",
4666 					   n, stats->nr_failures, syscall_stats_entry->msecs, min, avg);
4667 			printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct);
4668 
4669 			if (trace->errno_summary && stats->nr_failures) {
4670 				int e;
4671 
4672 				for (e = 0; e < stats->max_errno; ++e) {
4673 					if (stats->errnos[e] != 0)
4674 						fprintf(fp, "\t\t\t\t%s: %d\n", perf_env__arch_strerrno(trace->host->env, e + 1), stats->errnos[e]);
4675 				}
4676 			}
4677 		}
4678 	}
4679 
4680 	resort_rb__delete(syscall_stats);
4681 	printed += fprintf(fp, "\n\n");
4682 
4683 	return printed;
4684 }
4685 
4686 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
4687 {
4688 	size_t printed = 0;
4689 	struct thread_trace *ttrace = thread__priv(thread);
4690 	double ratio;
4691 
4692 	if (ttrace == NULL)
4693 		return 0;
4694 
4695 	ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
4696 
4697 	printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread__tid(thread));
4698 	printed += fprintf(fp, "%lu events, ", ttrace->nr_events);
4699 	printed += fprintf(fp, "%.1f%%", ratio);
4700 	if (ttrace->pfmaj)
4701 		printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj);
4702 	if (ttrace->pfmin)
4703 		printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin);
4704 	if (trace->sched)
4705 		printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms);
4706 	else if (fputc('\n', fp) != EOF)
4707 		++printed;
4708 
4709 	printed += thread__dump_stats(ttrace, trace, fp);
4710 
4711 	return printed;
4712 }
4713 
4714 static unsigned long thread__nr_events(struct thread_trace *ttrace)
4715 {
4716 	return ttrace ? ttrace->nr_events : 0;
4717 }
4718 
4719 static int trace_nr_events_cmp(void *priv __maybe_unused,
4720 			       const struct list_head *la,
4721 			       const struct list_head *lb)
4722 {
4723 	struct thread_list *a = list_entry(la, struct thread_list, list);
4724 	struct thread_list *b = list_entry(lb, struct thread_list, list);
4725 	unsigned long a_nr_events = thread__nr_events(thread__priv(a->thread));
4726 	unsigned long b_nr_events = thread__nr_events(thread__priv(b->thread));
4727 
4728 	if (a_nr_events != b_nr_events)
4729 		return a_nr_events < b_nr_events ? -1 : 1;
4730 
4731 	/* Identical number of threads, place smaller tids first. */
4732 	return thread__tid(a->thread) < thread__tid(b->thread)
4733 		? -1
4734 		: (thread__tid(a->thread) > thread__tid(b->thread) ? 1 : 0);
4735 }
4736 
4737 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
4738 {
4739 	size_t printed = trace__fprintf_threads_header(fp);
4740 	LIST_HEAD(threads);
4741 
4742 	if (machine__thread_list(trace->host, &threads) == 0) {
4743 		struct thread_list *pos;
4744 
4745 		list_sort(NULL, &threads, trace_nr_events_cmp);
4746 
4747 		list_for_each_entry(pos, &threads, list)
4748 			printed += trace__fprintf_thread(fp, pos->thread, trace);
4749 	}
4750 	thread_list__delete(&threads);
4751 	return printed;
4752 }
4753 
4754 static int trace__set_duration(const struct option *opt, const char *str,
4755 			       int unset __maybe_unused)
4756 {
4757 	struct trace *trace = opt->value;
4758 
4759 	trace->duration_filter = atof(str);
4760 	return 0;
4761 }
4762 
4763 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str,
4764 					      int unset __maybe_unused)
4765 {
4766 	int ret = -1;
4767 	size_t i;
4768 	struct trace *trace = opt->value;
4769 	/*
4770 	 * FIXME: introduce a intarray class, plain parse csv and create a
4771 	 * { int nr, int entries[] } struct...
4772 	 */
4773 	struct intlist *list = intlist__new(str);
4774 
4775 	if (list == NULL)
4776 		return -1;
4777 
4778 	i = trace->filter_pids.nr = intlist__nr_entries(list) + 1;
4779 	trace->filter_pids.entries = calloc(i, sizeof(pid_t));
4780 
4781 	if (trace->filter_pids.entries == NULL)
4782 		goto out;
4783 
4784 	trace->filter_pids.entries[0] = getpid();
4785 
4786 	for (i = 1; i < trace->filter_pids.nr; ++i)
4787 		trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i;
4788 
4789 	intlist__delete(list);
4790 	ret = 0;
4791 out:
4792 	return ret;
4793 }
4794 
4795 static int trace__open_output(struct trace *trace, const char *filename)
4796 {
4797 	struct stat st;
4798 
4799 	if (!stat(filename, &st) && st.st_size) {
4800 		char oldname[PATH_MAX];
4801 
4802 		scnprintf(oldname, sizeof(oldname), "%s.old", filename);
4803 		unlink(oldname);
4804 		rename(filename, oldname);
4805 	}
4806 
4807 	trace->output = fopen(filename, "w");
4808 
4809 	return trace->output == NULL ? -errno : 0;
4810 }
4811 
4812 static int parse_pagefaults(const struct option *opt, const char *str,
4813 			    int unset __maybe_unused)
4814 {
4815 	int *trace_pgfaults = opt->value;
4816 
4817 	if (strcmp(str, "all") == 0)
4818 		*trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN;
4819 	else if (strcmp(str, "maj") == 0)
4820 		*trace_pgfaults |= TRACE_PFMAJ;
4821 	else if (strcmp(str, "min") == 0)
4822 		*trace_pgfaults |= TRACE_PFMIN;
4823 	else
4824 		return -1;
4825 
4826 	return 0;
4827 }
4828 
4829 static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler)
4830 {
4831 	struct evsel *evsel;
4832 
4833 	evlist__for_each_entry(evlist, evsel) {
4834 		if (evsel->handler == NULL)
4835 			evsel->handler = handler;
4836 	}
4837 }
4838 
4839 static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name)
4840 {
4841 	struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
4842 
4843 	if (fmt) {
4844 		const struct syscall_fmt *scfmt = syscall_fmt__find(name);
4845 
4846 		if (scfmt) {
4847 			int skip = 0;
4848 
4849 			if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 ||
4850 			    strcmp(evsel->tp_format->format.fields->name, "nr") == 0)
4851 				++skip;
4852 
4853 			memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt));
4854 		}
4855 	}
4856 }
4857 
4858 static int evlist__set_syscall_tp_fields(struct evlist *evlist, bool *use_btf)
4859 {
4860 	struct evsel *evsel;
4861 
4862 	evlist__for_each_entry(evlist, evsel) {
4863 		if (evsel->priv || !evsel->tp_format)
4864 			continue;
4865 
4866 		if (strcmp(evsel->tp_format->system, "syscalls")) {
4867 			evsel__init_tp_arg_scnprintf(evsel, use_btf);
4868 			continue;
4869 		}
4870 
4871 		if (evsel__init_syscall_tp(evsel))
4872 			return -1;
4873 
4874 		if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
4875 			struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4876 
4877 			if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
4878 				return -1;
4879 
4880 			evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1);
4881 		} else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
4882 			struct syscall_tp *sc = __evsel__syscall_tp(evsel);
4883 
4884 			if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
4885 				return -1;
4886 
4887 			evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1);
4888 		}
4889 	}
4890 
4891 	return 0;
4892 }
4893 
4894 /*
4895  * XXX: Hackish, just splitting the combined -e+--event (syscalls
4896  * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use
4897  * existing facilities unchanged (trace->ev_qualifier + parse_options()).
4898  *
4899  * It'd be better to introduce a parse_options() variant that would return a
4900  * list with the terms it didn't match to an event...
4901  */
4902 static int trace__parse_events_option(const struct option *opt, const char *str,
4903 				      int unset __maybe_unused)
4904 {
4905 	struct trace *trace = (struct trace *)opt->value;
4906 	const char *s = str;
4907 	char *sep = NULL, *lists[2] = { NULL, NULL, };
4908 	int len = strlen(str) + 1, err = -1, list, idx;
4909 	char *strace_groups_dir = system_path(STRACE_GROUPS_DIR);
4910 	char group_name[PATH_MAX];
4911 	const struct syscall_fmt *fmt;
4912 
4913 	if (strace_groups_dir == NULL)
4914 		return -1;
4915 
4916 	if (*s == '!') {
4917 		++s;
4918 		trace->not_ev_qualifier = true;
4919 	}
4920 
4921 	while (1) {
4922 		if ((sep = strchr(s, ',')) != NULL)
4923 			*sep = '\0';
4924 
4925 		list = 0;
4926 		if (syscalltbl__id(trace->sctbl, s) >= 0 ||
4927 		    syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
4928 			list = 1;
4929 			goto do_concat;
4930 		}
4931 
4932 		fmt = syscall_fmt__find_by_alias(s);
4933 		if (fmt != NULL) {
4934 			list = 1;
4935 			s = fmt->name;
4936 		} else {
4937 			path__join(group_name, sizeof(group_name), strace_groups_dir, s);
4938 			if (access(group_name, R_OK) == 0)
4939 				list = 1;
4940 		}
4941 do_concat:
4942 		if (lists[list]) {
4943 			sprintf(lists[list] + strlen(lists[list]), ",%s", s);
4944 		} else {
4945 			lists[list] = malloc(len);
4946 			if (lists[list] == NULL)
4947 				goto out;
4948 			strcpy(lists[list], s);
4949 		}
4950 
4951 		if (!sep)
4952 			break;
4953 
4954 		*sep = ',';
4955 		s = sep + 1;
4956 	}
4957 
4958 	if (lists[1] != NULL) {
4959 		struct strlist_config slist_config = {
4960 			.dirname = strace_groups_dir,
4961 		};
4962 
4963 		trace->ev_qualifier = strlist__new(lists[1], &slist_config);
4964 		if (trace->ev_qualifier == NULL) {
4965 			fputs("Not enough memory to parse event qualifier", trace->output);
4966 			goto out;
4967 		}
4968 
4969 		if (trace__validate_ev_qualifier(trace))
4970 			goto out;
4971 		trace->trace_syscalls = true;
4972 	}
4973 
4974 	err = 0;
4975 
4976 	if (lists[0]) {
4977 		struct parse_events_option_args parse_events_option_args = {
4978 			.evlistp = &trace->evlist,
4979 		};
4980 		struct option o = {
4981 			.value = &parse_events_option_args,
4982 		};
4983 		err = parse_events_option(&o, lists[0], 0);
4984 	}
4985 out:
4986 	free(strace_groups_dir);
4987 	free(lists[0]);
4988 	free(lists[1]);
4989 	if (sep)
4990 		*sep = ',';
4991 
4992 	return err;
4993 }
4994 
4995 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset)
4996 {
4997 	struct trace *trace = opt->value;
4998 
4999 	if (!list_empty(&trace->evlist->core.entries)) {
5000 		struct option o = {
5001 			.value = &trace->evlist,
5002 		};
5003 		return parse_cgroups(&o, str, unset);
5004 	}
5005 	trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
5006 
5007 	return 0;
5008 }
5009 
5010 static int trace__config(const char *var, const char *value, void *arg)
5011 {
5012 	struct trace *trace = arg;
5013 	int err = 0;
5014 
5015 	if (!strcmp(var, "trace.add_events")) {
5016 		trace->perfconfig_events = strdup(value);
5017 		if (trace->perfconfig_events == NULL) {
5018 			pr_err("Not enough memory for %s\n", "trace.add_events");
5019 			return -1;
5020 		}
5021 	} else if (!strcmp(var, "trace.show_timestamp")) {
5022 		trace->show_tstamp = perf_config_bool(var, value);
5023 	} else if (!strcmp(var, "trace.show_duration")) {
5024 		trace->show_duration = perf_config_bool(var, value);
5025 	} else if (!strcmp(var, "trace.show_arg_names")) {
5026 		trace->show_arg_names = perf_config_bool(var, value);
5027 		if (!trace->show_arg_names)
5028 			trace->show_zeros = true;
5029 	} else if (!strcmp(var, "trace.show_zeros")) {
5030 		bool new_show_zeros = perf_config_bool(var, value);
5031 		if (!trace->show_arg_names && !new_show_zeros) {
5032 			pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n");
5033 			goto out;
5034 		}
5035 		trace->show_zeros = new_show_zeros;
5036 	} else if (!strcmp(var, "trace.show_prefix")) {
5037 		trace->show_string_prefix = perf_config_bool(var, value);
5038 	} else if (!strcmp(var, "trace.no_inherit")) {
5039 		trace->opts.no_inherit = perf_config_bool(var, value);
5040 	} else if (!strcmp(var, "trace.args_alignment")) {
5041 		int args_alignment = 0;
5042 		if (perf_config_int(&args_alignment, var, value) == 0)
5043 			trace->args_alignment = args_alignment;
5044 	} else if (!strcmp(var, "trace.tracepoint_beautifiers")) {
5045 		if (strcasecmp(value, "libtraceevent") == 0)
5046 			trace->libtraceevent_print = true;
5047 		else if (strcasecmp(value, "libbeauty") == 0)
5048 			trace->libtraceevent_print = false;
5049 	}
5050 out:
5051 	return err;
5052 }
5053 
5054 static void trace__exit(struct trace *trace)
5055 {
5056 	int i;
5057 
5058 	strlist__delete(trace->ev_qualifier);
5059 	zfree(&trace->ev_qualifier_ids.entries);
5060 	if (trace->syscalls.table) {
5061 		for (i = 0; i <= trace->sctbl->syscalls.max_id; i++)
5062 			syscall__exit(&trace->syscalls.table[i]);
5063 		zfree(&trace->syscalls.table);
5064 	}
5065 	syscalltbl__delete(trace->sctbl);
5066 	zfree(&trace->perfconfig_events);
5067 }
5068 
5069 #ifdef HAVE_BPF_SKEL
5070 static int bpf__setup_bpf_output(struct evlist *evlist)
5071 {
5072 	int err = parse_event(evlist, "bpf-output/no-inherit=1,name=__augmented_syscalls__/");
5073 
5074 	if (err)
5075 		pr_debug("ERROR: failed to create the \"__augmented_syscalls__\" bpf-output event\n");
5076 
5077 	return err;
5078 }
5079 #endif
5080 
5081 int cmd_trace(int argc, const char **argv)
5082 {
5083 	const char *trace_usage[] = {
5084 		"perf trace [<options>] [<command>]",
5085 		"perf trace [<options>] -- <command> [<options>]",
5086 		"perf trace record [<options>] [<command>]",
5087 		"perf trace record [<options>] -- <command> [<options>]",
5088 		NULL
5089 	};
5090 	struct trace trace = {
5091 		.opts = {
5092 			.target = {
5093 				.uid	   = UINT_MAX,
5094 				.uses_mmap = true,
5095 			},
5096 			.user_freq     = UINT_MAX,
5097 			.user_interval = ULLONG_MAX,
5098 			.no_buffering  = true,
5099 			.mmap_pages    = UINT_MAX,
5100 		},
5101 		.output = stderr,
5102 		.show_comm = true,
5103 		.show_tstamp = true,
5104 		.show_duration = true,
5105 		.show_arg_names = true,
5106 		.args_alignment = 70,
5107 		.trace_syscalls = false,
5108 		.kernel_syscallchains = false,
5109 		.max_stack = UINT_MAX,
5110 		.max_events = ULONG_MAX,
5111 	};
5112 	const char *output_name = NULL;
5113 	const struct option trace_options[] = {
5114 	OPT_CALLBACK('e', "event", &trace, "event",
5115 		     "event/syscall selector. use 'perf list' to list available events",
5116 		     trace__parse_events_option),
5117 	OPT_CALLBACK(0, "filter", &trace.evlist, "filter",
5118 		     "event filter", parse_filter),
5119 	OPT_BOOLEAN(0, "comm", &trace.show_comm,
5120 		    "show the thread COMM next to its id"),
5121 	OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"),
5122 	OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace",
5123 		     trace__parse_events_option),
5124 	OPT_STRING('o', "output", &output_name, "file", "output file name"),
5125 	OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
5126 	OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
5127 		    "trace events on existing process id"),
5128 	OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
5129 		    "trace events on existing thread id"),
5130 	OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids",
5131 		     "pids to filter (by the kernel)", trace__set_filter_pids_from_option),
5132 	OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
5133 		    "system-wide collection from all CPUs"),
5134 	OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
5135 		    "list of cpus to monitor"),
5136 	OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
5137 		    "child tasks do not inherit counters"),
5138 	OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages",
5139 		     "number of mmap data pages", evlist__parse_mmap_pages),
5140 	OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
5141 		   "user to profile"),
5142 	OPT_CALLBACK(0, "duration", &trace, "float",
5143 		     "show only events with duration > N.M ms",
5144 		     trace__set_duration),
5145 	OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
5146 	OPT_INCR('v', "verbose", &verbose, "be more verbose"),
5147 	OPT_BOOLEAN('T', "time", &trace.full_time,
5148 		    "Show full timestamp, not time relative to first start"),
5149 	OPT_BOOLEAN(0, "failure", &trace.failure_only,
5150 		    "Show only syscalls that failed"),
5151 	OPT_BOOLEAN('s', "summary", &trace.summary_only,
5152 		    "Show only syscall summary with statistics"),
5153 	OPT_BOOLEAN('S', "with-summary", &trace.summary,
5154 		    "Show all syscalls and summary with statistics"),
5155 	OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary,
5156 		    "Show errno stats per syscall, use with -s or -S"),
5157 	OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min",
5158 		     "Trace pagefaults", parse_pagefaults, "maj"),
5159 	OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"),
5160 	OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"),
5161 	OPT_CALLBACK(0, "call-graph", &trace.opts,
5162 		     "record_mode[,record_size]", record_callchain_help,
5163 		     &record_parse_callchain_opt),
5164 	OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print,
5165 		    "Use libtraceevent to print the tracepoint arguments."),
5166 	OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains,
5167 		    "Show the kernel callchains on the syscall exit path"),
5168 	OPT_ULONG(0, "max-events", &trace.max_events,
5169 		"Set the maximum number of events to print, exit after that is reached. "),
5170 	OPT_UINTEGER(0, "min-stack", &trace.min_stack,
5171 		     "Set the minimum stack depth when parsing the callchain, "
5172 		     "anything below the specified depth will be ignored."),
5173 	OPT_UINTEGER(0, "max-stack", &trace.max_stack,
5174 		     "Set the maximum stack depth when parsing the callchain, "
5175 		     "anything beyond the specified depth will be ignored. "
5176 		     "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
5177 	OPT_BOOLEAN(0, "sort-events", &trace.sort_events,
5178 			"Sort batch of events before processing, use if getting out of order events"),
5179 	OPT_BOOLEAN(0, "print-sample", &trace.print_sample,
5180 			"print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"),
5181 	OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
5182 			"per thread proc mmap processing timeout in ms"),
5183 	OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only",
5184 		     trace__parse_cgroups),
5185 	OPT_INTEGER('D', "delay", &trace.opts.target.initial_delay,
5186 		     "ms to wait before starting measurement after program "
5187 		     "start"),
5188 	OPT_BOOLEAN(0, "force-btf", &trace.force_btf, "Prefer btf_dump general pretty printer"
5189 		       "to customized ones"),
5190 	OPTS_EVSWITCH(&trace.evswitch),
5191 	OPT_END()
5192 	};
5193 	bool __maybe_unused max_stack_user_set = true;
5194 	bool mmap_pages_user_set = true;
5195 	struct evsel *evsel;
5196 	const char * const trace_subcommands[] = { "record", NULL };
5197 	int err = -1;
5198 	char bf[BUFSIZ];
5199 	struct sigaction sigchld_act;
5200 
5201 	signal(SIGSEGV, sighandler_dump_stack);
5202 	signal(SIGFPE, sighandler_dump_stack);
5203 	signal(SIGINT, sighandler_interrupt);
5204 
5205 	memset(&sigchld_act, 0, sizeof(sigchld_act));
5206 	sigchld_act.sa_flags = SA_SIGINFO;
5207 	sigchld_act.sa_sigaction = sighandler_chld;
5208 	sigaction(SIGCHLD, &sigchld_act, NULL);
5209 
5210 	trace.evlist = evlist__new();
5211 	trace.sctbl = syscalltbl__new();
5212 
5213 	if (trace.evlist == NULL || trace.sctbl == NULL) {
5214 		pr_err("Not enough memory to run!\n");
5215 		err = -ENOMEM;
5216 		goto out;
5217 	}
5218 
5219 	/*
5220 	 * Parsing .perfconfig may entail creating a BPF event, that may need
5221 	 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting
5222 	 * is too small. This affects just this process, not touching the
5223 	 * global setting. If it fails we'll get something in 'perf trace -v'
5224 	 * to help diagnose the problem.
5225 	 */
5226 	rlimit__bump_memlock();
5227 
5228 	err = perf_config(trace__config, &trace);
5229 	if (err)
5230 		goto out;
5231 
5232 	argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands,
5233 				 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION);
5234 
5235 	/*
5236 	 * Here we already passed thru trace__parse_events_option() and it has
5237 	 * already figured out if -e syscall_name, if not but if --event
5238 	 * foo:bar was used, the user is interested _just_ in those, say,
5239 	 * tracepoint events, not in the strace-like syscall-name-based mode.
5240 	 *
5241 	 * This is important because we need to check if strace-like mode is
5242 	 * needed to decided if we should filter out the eBPF
5243 	 * __augmented_syscalls__ code, if it is in the mix, say, via
5244 	 * .perfconfig trace.add_events, and filter those out.
5245 	 */
5246 	if (!trace.trace_syscalls && !trace.trace_pgfaults &&
5247 	    trace.evlist->core.nr_entries == 0 /* Was --events used? */) {
5248 		trace.trace_syscalls = true;
5249 	}
5250 	/*
5251 	 * Now that we have --verbose figured out, lets see if we need to parse
5252 	 * events from .perfconfig, so that if those events fail parsing, say some
5253 	 * BPF program fails, then we'll be able to use --verbose to see what went
5254 	 * wrong in more detail.
5255 	 */
5256 	if (trace.perfconfig_events != NULL) {
5257 		struct parse_events_error parse_err;
5258 
5259 		parse_events_error__init(&parse_err);
5260 		err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err);
5261 		if (err)
5262 			parse_events_error__print(&parse_err, trace.perfconfig_events);
5263 		parse_events_error__exit(&parse_err);
5264 		if (err)
5265 			goto out;
5266 	}
5267 
5268 	if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) {
5269 		usage_with_options_msg(trace_usage, trace_options,
5270 				       "cgroup monitoring only available in system-wide mode");
5271 	}
5272 
5273 #ifdef HAVE_BPF_SKEL
5274 	if (!trace.trace_syscalls)
5275 		goto skip_augmentation;
5276 
5277 	if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) {
5278 		pr_debug("Syscall augmentation fails with record, disabling augmentation");
5279 		goto skip_augmentation;
5280 	}
5281 
5282 	trace.skel = augmented_raw_syscalls_bpf__open();
5283 	if (!trace.skel) {
5284 		pr_debug("Failed to open augmented syscalls BPF skeleton");
5285 	} else {
5286 		/*
5287 		 * Disable attaching the BPF programs except for sys_enter and
5288 		 * sys_exit that tail call into this as necessary.
5289 		 */
5290 		struct bpf_program *prog;
5291 
5292 		bpf_object__for_each_program(prog, trace.skel->obj) {
5293 			if (prog != trace.skel->progs.sys_enter && prog != trace.skel->progs.sys_exit)
5294 				bpf_program__set_autoattach(prog, /*autoattach=*/false);
5295 		}
5296 
5297 		err = augmented_raw_syscalls_bpf__load(trace.skel);
5298 
5299 		if (err < 0) {
5300 			libbpf_strerror(err, bf, sizeof(bf));
5301 			pr_debug("Failed to load augmented syscalls BPF skeleton: %s\n", bf);
5302 		} else {
5303 			augmented_raw_syscalls_bpf__attach(trace.skel);
5304 			trace__add_syscall_newtp(&trace);
5305 		}
5306 	}
5307 
5308 	err = bpf__setup_bpf_output(trace.evlist);
5309 	if (err) {
5310 		libbpf_strerror(err, bf, sizeof(bf));
5311 		pr_err("ERROR: Setup BPF output event failed: %s\n", bf);
5312 		goto out;
5313 	}
5314 	trace.syscalls.events.bpf_output = evlist__last(trace.evlist);
5315 	assert(evsel__name_is(trace.syscalls.events.bpf_output, "__augmented_syscalls__"));
5316 skip_augmentation:
5317 #endif
5318 	err = -1;
5319 
5320 	if (trace.trace_pgfaults) {
5321 		trace.opts.sample_address = true;
5322 		trace.opts.sample_time = true;
5323 	}
5324 
5325 	if (trace.opts.mmap_pages == UINT_MAX)
5326 		mmap_pages_user_set = false;
5327 
5328 	if (trace.max_stack == UINT_MAX) {
5329 		trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
5330 		max_stack_user_set = false;
5331 	}
5332 
5333 #ifdef HAVE_DWARF_UNWIND_SUPPORT
5334 	if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) {
5335 		record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false);
5336 	}
5337 #endif
5338 
5339 	if (callchain_param.enabled) {
5340 		if (!mmap_pages_user_set && geteuid() == 0)
5341 			trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4;
5342 
5343 		symbol_conf.use_callchain = true;
5344 	}
5345 
5346 	if (trace.evlist->core.nr_entries > 0) {
5347 		bool use_btf = false;
5348 
5349 		evlist__set_default_evsel_handler(trace.evlist, trace__event_handler);
5350 		if (evlist__set_syscall_tp_fields(trace.evlist, &use_btf)) {
5351 			perror("failed to set syscalls:* tracepoint fields");
5352 			goto out;
5353 		}
5354 
5355 		if (use_btf)
5356 			trace__load_vmlinux_btf(&trace);
5357 	}
5358 
5359 	if (trace.sort_events) {
5360 		ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace);
5361 		ordered_events__set_copy_on_queue(&trace.oe.data, true);
5362 	}
5363 
5364 	/*
5365 	 * If we are augmenting syscalls, then combine what we put in the
5366 	 * __augmented_syscalls__ BPF map with what is in the
5367 	 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF,
5368 	 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit.
5369 	 *
5370 	 * We'll switch to look at two BPF maps, one for sys_enter and the
5371 	 * other for sys_exit when we start augmenting the sys_exit paths with
5372 	 * buffers that are being copied from kernel to userspace, think 'read'
5373 	 * syscall.
5374 	 */
5375 	if (trace.syscalls.events.bpf_output) {
5376 		evlist__for_each_entry(trace.evlist, evsel) {
5377 			bool raw_syscalls_sys_exit = evsel__name_is(evsel, "raw_syscalls:sys_exit");
5378 
5379 			if (raw_syscalls_sys_exit) {
5380 				trace.raw_augmented_syscalls = true;
5381 				goto init_augmented_syscall_tp;
5382 			}
5383 
5384 			if (trace.syscalls.events.bpf_output->priv == NULL &&
5385 			    strstr(evsel__name(evsel), "syscalls:sys_enter")) {
5386 				struct evsel *augmented = trace.syscalls.events.bpf_output;
5387 				if (evsel__init_augmented_syscall_tp(augmented, evsel) ||
5388 				    evsel__init_augmented_syscall_tp_args(augmented))
5389 					goto out;
5390 				/*
5391 				 * Augmented is __augmented_syscalls__ BPF_OUTPUT event
5392 				 * Above we made sure we can get from the payload the tp fields
5393 				 * that we get from syscalls:sys_enter tracefs format file.
5394 				 */
5395 				augmented->handler = trace__sys_enter;
5396 				/*
5397 				 * Now we do the same for the *syscalls:sys_enter event so that
5398 				 * if we handle it directly, i.e. if the BPF prog returns 0 so
5399 				 * as not to filter it, then we'll handle it just like we would
5400 				 * for the BPF_OUTPUT one:
5401 				 */
5402 				if (evsel__init_augmented_syscall_tp(evsel, evsel) ||
5403 				    evsel__init_augmented_syscall_tp_args(evsel))
5404 					goto out;
5405 				evsel->handler = trace__sys_enter;
5406 			}
5407 
5408 			if (strstarts(evsel__name(evsel), "syscalls:sys_exit_")) {
5409 				struct syscall_tp *sc;
5410 init_augmented_syscall_tp:
5411 				if (evsel__init_augmented_syscall_tp(evsel, evsel))
5412 					goto out;
5413 				sc = __evsel__syscall_tp(evsel);
5414 				/*
5415 				 * For now with BPF raw_augmented we hook into
5416 				 * raw_syscalls:sys_enter and there we get all
5417 				 * 6 syscall args plus the tracepoint common
5418 				 * fields and the syscall_nr (another long).
5419 				 * So we check if that is the case and if so
5420 				 * don't look after the sc->args_size but
5421 				 * always after the full raw_syscalls:sys_enter
5422 				 * payload, which is fixed.
5423 				 *
5424 				 * We'll revisit this later to pass
5425 				 * s->args_size to the BPF augmenter (now
5426 				 * tools/perf/examples/bpf/augmented_raw_syscalls.c,
5427 				 * so that it copies only what we need for each
5428 				 * syscall, like what happens when we use
5429 				 * syscalls:sys_enter_NAME, so that we reduce
5430 				 * the kernel/userspace traffic to just what is
5431 				 * needed for each syscall.
5432 				 */
5433 				if (trace.raw_augmented_syscalls)
5434 					trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset;
5435 				evsel__init_augmented_syscall_tp_ret(evsel);
5436 				evsel->handler = trace__sys_exit;
5437 			}
5438 		}
5439 	}
5440 
5441 	if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
5442 		return trace__record(&trace, argc-1, &argv[1]);
5443 
5444 	/* Using just --errno-summary will trigger --summary */
5445 	if (trace.errno_summary && !trace.summary && !trace.summary_only)
5446 		trace.summary_only = true;
5447 
5448 	/* summary_only implies summary option, but don't overwrite summary if set */
5449 	if (trace.summary_only)
5450 		trace.summary = trace.summary_only;
5451 
5452 	if (output_name != NULL) {
5453 		err = trace__open_output(&trace, output_name);
5454 		if (err < 0) {
5455 			perror("failed to create output file");
5456 			goto out;
5457 		}
5458 	}
5459 
5460 	err = evswitch__init(&trace.evswitch, trace.evlist, stderr);
5461 	if (err)
5462 		goto out_close;
5463 
5464 	err = target__validate(&trace.opts.target);
5465 	if (err) {
5466 		target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5467 		fprintf(trace.output, "%s", bf);
5468 		goto out_close;
5469 	}
5470 
5471 	err = target__parse_uid(&trace.opts.target);
5472 	if (err) {
5473 		target__strerror(&trace.opts.target, err, bf, sizeof(bf));
5474 		fprintf(trace.output, "%s", bf);
5475 		goto out_close;
5476 	}
5477 
5478 	if (!argc && target__none(&trace.opts.target))
5479 		trace.opts.target.system_wide = true;
5480 
5481 	if (input_name)
5482 		err = trace__replay(&trace);
5483 	else
5484 		err = trace__run(&trace, argc, argv);
5485 
5486 out_close:
5487 	if (output_name != NULL)
5488 		fclose(trace.output);
5489 out:
5490 	trace__exit(&trace);
5491 #ifdef HAVE_BPF_SKEL
5492 	augmented_raw_syscalls_bpf__destroy(trace.skel);
5493 #endif
5494 	return err;
5495 }
5496