xref: /linux/tools/perf/util/session.c (revision c34e9ab9a612ee8b18273398ef75c207b01f516d)
1 // SPDX-License-Identifier: GPL-2.0
2 #include <errno.h>
3 #include <signal.h>
4 #include <inttypes.h>
5 #include <linux/err.h>
6 #include <linux/kernel.h>
7 #include <linux/zalloc.h>
8 #include <api/fs/fs.h>
9 
10 #include <byteswap.h>
11 #include <unistd.h>
12 #include <sys/types.h>
13 #include <sys/mman.h>
14 #include <perf/cpumap.h>
15 
16 #include "map_symbol.h"
17 #include "branch.h"
18 #include "debug.h"
19 #include "env.h"
20 #include "evlist.h"
21 #include "evsel.h"
22 #include "memswap.h"
23 #include "map.h"
24 #include "symbol.h"
25 #include "session.h"
26 #include "tool.h"
27 #include "perf_regs.h"
28 #include "asm/bug.h"
29 #include "auxtrace.h"
30 #include "thread.h"
31 #include "thread-stack.h"
32 #include "sample-raw.h"
33 #include "stat.h"
34 #include "tsc.h"
35 #include "ui/progress.h"
36 #include "util.h"
37 #include "arch/common.h"
38 #include "units.h"
39 #include "annotate.h"
40 #include <internal/lib.h>
41 
42 static int perf_session__deliver_event(struct perf_session *session,
43 				       union perf_event *event,
44 				       const struct perf_tool *tool,
45 				       u64 file_offset,
46 				       const char *file_path);
47 
48 static int perf_session__open(struct perf_session *session)
49 {
50 	struct perf_data *data = session->data;
51 
52 	if (perf_session__read_header(session) < 0) {
53 		pr_err("incompatible file format (rerun with -v to learn more)\n");
54 		return -1;
55 	}
56 
57 	if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) {
58 		/* Auxiliary events may reference exited threads, hold onto dead ones. */
59 		symbol_conf.keep_exited_threads = true;
60 	}
61 
62 	if (perf_data__is_pipe(data))
63 		return 0;
64 
65 	if (perf_header__has_feat(&session->header, HEADER_STAT))
66 		return 0;
67 
68 	if (!evlist__valid_sample_type(session->evlist)) {
69 		pr_err("non matching sample_type\n");
70 		return -1;
71 	}
72 
73 	if (!evlist__valid_sample_id_all(session->evlist)) {
74 		pr_err("non matching sample_id_all\n");
75 		return -1;
76 	}
77 
78 	if (!evlist__valid_read_format(session->evlist)) {
79 		pr_err("non matching read_format\n");
80 		return -1;
81 	}
82 
83 	return 0;
84 }
85 
86 void perf_session__set_id_hdr_size(struct perf_session *session)
87 {
88 	u16 id_hdr_size = evlist__id_hdr_size(session->evlist);
89 
90 	machines__set_id_hdr_size(&session->machines, id_hdr_size);
91 }
92 
93 int perf_session__create_kernel_maps(struct perf_session *session)
94 {
95 	int ret = machine__create_kernel_maps(&session->machines.host);
96 
97 	if (ret >= 0)
98 		ret = machines__create_guest_kernel_maps(&session->machines);
99 	return ret;
100 }
101 
102 static void perf_session__destroy_kernel_maps(struct perf_session *session)
103 {
104 	machines__destroy_kernel_maps(&session->machines);
105 }
106 
107 static bool perf_session__has_comm_exec(struct perf_session *session)
108 {
109 	struct evsel *evsel;
110 
111 	evlist__for_each_entry(session->evlist, evsel) {
112 		if (evsel->core.attr.comm_exec)
113 			return true;
114 	}
115 
116 	return false;
117 }
118 
119 static void perf_session__set_comm_exec(struct perf_session *session)
120 {
121 	bool comm_exec = perf_session__has_comm_exec(session);
122 
123 	machines__set_comm_exec(&session->machines, comm_exec);
124 }
125 
126 static int ordered_events__deliver_event(struct ordered_events *oe,
127 					 struct ordered_event *event)
128 {
129 	struct perf_session *session = container_of(oe, struct perf_session,
130 						    ordered_events);
131 
132 	return perf_session__deliver_event(session, event->event,
133 					   session->tool, event->file_offset,
134 					   event->file_path);
135 }
136 
137 struct perf_session *__perf_session__new(struct perf_data *data,
138 					 struct perf_tool *tool,
139 					 bool trace_event_repipe)
140 {
141 	int ret = -ENOMEM;
142 	struct perf_session *session = zalloc(sizeof(*session));
143 
144 	if (!session)
145 		goto out;
146 
147 	session->trace_event_repipe = trace_event_repipe;
148 	session->tool   = tool;
149 	session->decomp_data.zstd_decomp = &session->zstd_data;
150 	session->active_decomp = &session->decomp_data;
151 	INIT_LIST_HEAD(&session->auxtrace_index);
152 	machines__init(&session->machines);
153 	ordered_events__init(&session->ordered_events,
154 			     ordered_events__deliver_event, NULL);
155 
156 	perf_env__init(&session->header.env);
157 	if (data) {
158 		ret = perf_data__open(data);
159 		if (ret < 0)
160 			goto out_delete;
161 
162 		session->data = data;
163 
164 		if (perf_data__is_read(data)) {
165 			ret = perf_session__open(session);
166 			if (ret < 0)
167 				goto out_delete;
168 
169 			/*
170 			 * set session attributes that are present in perf.data
171 			 * but not in pipe-mode.
172 			 */
173 			if (!data->is_pipe) {
174 				perf_session__set_id_hdr_size(session);
175 				perf_session__set_comm_exec(session);
176 			}
177 
178 			evlist__init_trace_event_sample_raw(session->evlist);
179 
180 			/* Open the directory data. */
181 			if (data->is_dir) {
182 				ret = perf_data__open_dir(data);
183 				if (ret)
184 					goto out_delete;
185 			}
186 
187 			if (!symbol_conf.kallsyms_name &&
188 			    !symbol_conf.vmlinux_name)
189 				symbol_conf.kallsyms_name = perf_data__kallsyms_name(data);
190 		}
191 	} else  {
192 		session->machines.host.env = &perf_env;
193 	}
194 
195 	session->machines.host.single_address_space =
196 		perf_env__single_address_space(session->machines.host.env);
197 
198 	if (!data || perf_data__is_write(data)) {
199 		/*
200 		 * In O_RDONLY mode this will be performed when reading the
201 		 * kernel MMAP event, in perf_event__process_mmap().
202 		 */
203 		if (perf_session__create_kernel_maps(session) < 0)
204 			pr_warning("Cannot read kernel map\n");
205 	}
206 
207 	/*
208 	 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
209 	 * processed, so evlist__sample_id_all is not meaningful here.
210 	 */
211 	if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps &&
212 	    tool->ordered_events && !evlist__sample_id_all(session->evlist)) {
213 		dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
214 		tool->ordered_events = false;
215 	}
216 
217 	return session;
218 
219  out_delete:
220 	perf_session__delete(session);
221  out:
222 	return ERR_PTR(ret);
223 }
224 
225 static void perf_decomp__release_events(struct decomp *next)
226 {
227 	struct decomp *decomp;
228 	size_t mmap_len;
229 
230 	do {
231 		decomp = next;
232 		if (decomp == NULL)
233 			break;
234 		next = decomp->next;
235 		mmap_len = decomp->mmap_len;
236 		munmap(decomp, mmap_len);
237 	} while (1);
238 }
239 
240 void perf_session__delete(struct perf_session *session)
241 {
242 	if (session == NULL)
243 		return;
244 	auxtrace__free(session);
245 	auxtrace_index__free(&session->auxtrace_index);
246 	debuginfo_cache__delete();
247 	perf_session__destroy_kernel_maps(session);
248 	perf_decomp__release_events(session->decomp_data.decomp);
249 	perf_env__exit(&session->header.env);
250 	machines__exit(&session->machines);
251 	if (session->data) {
252 		if (perf_data__is_read(session->data))
253 			evlist__delete(session->evlist);
254 		perf_data__close(session->data);
255 	}
256 #ifdef HAVE_LIBTRACEEVENT
257 	trace_event__cleanup(&session->tevent);
258 #endif
259 	free(session);
260 }
261 
262 static void swap_sample_id_all(union perf_event *event, void *data)
263 {
264 	void *end = (void *) event + event->header.size;
265 	int size = end - data;
266 
267 	BUG_ON(size % sizeof(u64));
268 	mem_bswap_64(data, size);
269 }
270 
271 static void perf_event__all64_swap(union perf_event *event,
272 				   bool sample_id_all __maybe_unused)
273 {
274 	struct perf_event_header *hdr = &event->header;
275 	mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
276 }
277 
278 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
279 {
280 	event->comm.pid = bswap_32(event->comm.pid);
281 	event->comm.tid = bswap_32(event->comm.tid);
282 
283 	if (sample_id_all) {
284 		void *data = &event->comm.comm;
285 
286 		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
287 		swap_sample_id_all(event, data);
288 	}
289 }
290 
291 static void perf_event__mmap_swap(union perf_event *event,
292 				  bool sample_id_all)
293 {
294 	event->mmap.pid	  = bswap_32(event->mmap.pid);
295 	event->mmap.tid	  = bswap_32(event->mmap.tid);
296 	event->mmap.start = bswap_64(event->mmap.start);
297 	event->mmap.len	  = bswap_64(event->mmap.len);
298 	event->mmap.pgoff = bswap_64(event->mmap.pgoff);
299 
300 	if (sample_id_all) {
301 		void *data = &event->mmap.filename;
302 
303 		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
304 		swap_sample_id_all(event, data);
305 	}
306 }
307 
308 static void perf_event__mmap2_swap(union perf_event *event,
309 				  bool sample_id_all)
310 {
311 	event->mmap2.pid   = bswap_32(event->mmap2.pid);
312 	event->mmap2.tid   = bswap_32(event->mmap2.tid);
313 	event->mmap2.start = bswap_64(event->mmap2.start);
314 	event->mmap2.len   = bswap_64(event->mmap2.len);
315 	event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
316 
317 	if (!(event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID)) {
318 		event->mmap2.maj   = bswap_32(event->mmap2.maj);
319 		event->mmap2.min   = bswap_32(event->mmap2.min);
320 		event->mmap2.ino   = bswap_64(event->mmap2.ino);
321 		event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation);
322 	}
323 
324 	if (sample_id_all) {
325 		void *data = &event->mmap2.filename;
326 
327 		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
328 		swap_sample_id_all(event, data);
329 	}
330 }
331 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
332 {
333 	event->fork.pid	 = bswap_32(event->fork.pid);
334 	event->fork.tid	 = bswap_32(event->fork.tid);
335 	event->fork.ppid = bswap_32(event->fork.ppid);
336 	event->fork.ptid = bswap_32(event->fork.ptid);
337 	event->fork.time = bswap_64(event->fork.time);
338 
339 	if (sample_id_all)
340 		swap_sample_id_all(event, &event->fork + 1);
341 }
342 
343 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
344 {
345 	event->read.pid		 = bswap_32(event->read.pid);
346 	event->read.tid		 = bswap_32(event->read.tid);
347 	event->read.value	 = bswap_64(event->read.value);
348 	event->read.time_enabled = bswap_64(event->read.time_enabled);
349 	event->read.time_running = bswap_64(event->read.time_running);
350 	event->read.id		 = bswap_64(event->read.id);
351 
352 	if (sample_id_all)
353 		swap_sample_id_all(event, &event->read + 1);
354 }
355 
356 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
357 {
358 	event->aux.aux_offset = bswap_64(event->aux.aux_offset);
359 	event->aux.aux_size   = bswap_64(event->aux.aux_size);
360 	event->aux.flags      = bswap_64(event->aux.flags);
361 
362 	if (sample_id_all)
363 		swap_sample_id_all(event, &event->aux + 1);
364 }
365 
366 static void perf_event__itrace_start_swap(union perf_event *event,
367 					  bool sample_id_all)
368 {
369 	event->itrace_start.pid	 = bswap_32(event->itrace_start.pid);
370 	event->itrace_start.tid	 = bswap_32(event->itrace_start.tid);
371 
372 	if (sample_id_all)
373 		swap_sample_id_all(event, &event->itrace_start + 1);
374 }
375 
376 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
377 {
378 	if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
379 		event->context_switch.next_prev_pid =
380 				bswap_32(event->context_switch.next_prev_pid);
381 		event->context_switch.next_prev_tid =
382 				bswap_32(event->context_switch.next_prev_tid);
383 	}
384 
385 	if (sample_id_all)
386 		swap_sample_id_all(event, &event->context_switch + 1);
387 }
388 
389 static void perf_event__text_poke_swap(union perf_event *event, bool sample_id_all)
390 {
391 	event->text_poke.addr    = bswap_64(event->text_poke.addr);
392 	event->text_poke.old_len = bswap_16(event->text_poke.old_len);
393 	event->text_poke.new_len = bswap_16(event->text_poke.new_len);
394 
395 	if (sample_id_all) {
396 		size_t len = sizeof(event->text_poke.old_len) +
397 			     sizeof(event->text_poke.new_len) +
398 			     event->text_poke.old_len +
399 			     event->text_poke.new_len;
400 		void *data = &event->text_poke.old_len;
401 
402 		data += PERF_ALIGN(len, sizeof(u64));
403 		swap_sample_id_all(event, data);
404 	}
405 }
406 
407 static void perf_event__throttle_swap(union perf_event *event,
408 				      bool sample_id_all)
409 {
410 	event->throttle.time	  = bswap_64(event->throttle.time);
411 	event->throttle.id	  = bswap_64(event->throttle.id);
412 	event->throttle.stream_id = bswap_64(event->throttle.stream_id);
413 
414 	if (sample_id_all)
415 		swap_sample_id_all(event, &event->throttle + 1);
416 }
417 
418 static void perf_event__namespaces_swap(union perf_event *event,
419 					bool sample_id_all)
420 {
421 	u64 i;
422 
423 	event->namespaces.pid		= bswap_32(event->namespaces.pid);
424 	event->namespaces.tid		= bswap_32(event->namespaces.tid);
425 	event->namespaces.nr_namespaces	= bswap_64(event->namespaces.nr_namespaces);
426 
427 	for (i = 0; i < event->namespaces.nr_namespaces; i++) {
428 		struct perf_ns_link_info *ns = &event->namespaces.link_info[i];
429 
430 		ns->dev = bswap_64(ns->dev);
431 		ns->ino = bswap_64(ns->ino);
432 	}
433 
434 	if (sample_id_all)
435 		swap_sample_id_all(event, &event->namespaces.link_info[i]);
436 }
437 
438 static void perf_event__cgroup_swap(union perf_event *event, bool sample_id_all)
439 {
440 	event->cgroup.id = bswap_64(event->cgroup.id);
441 
442 	if (sample_id_all) {
443 		void *data = &event->cgroup.path;
444 
445 		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
446 		swap_sample_id_all(event, data);
447 	}
448 }
449 
450 static u8 revbyte(u8 b)
451 {
452 	int rev = (b >> 4) | ((b & 0xf) << 4);
453 	rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
454 	rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
455 	return (u8) rev;
456 }
457 
458 /*
459  * XXX this is hack in attempt to carry flags bitfield
460  * through endian village. ABI says:
461  *
462  * Bit-fields are allocated from right to left (least to most significant)
463  * on little-endian implementations and from left to right (most to least
464  * significant) on big-endian implementations.
465  *
466  * The above seems to be byte specific, so we need to reverse each
467  * byte of the bitfield. 'Internet' also says this might be implementation
468  * specific and we probably need proper fix and carry perf_event_attr
469  * bitfield flags in separate data file FEAT_ section. Thought this seems
470  * to work for now.
471  */
472 static void swap_bitfield(u8 *p, unsigned len)
473 {
474 	unsigned i;
475 
476 	for (i = 0; i < len; i++) {
477 		*p = revbyte(*p);
478 		p++;
479 	}
480 }
481 
482 /* exported for swapping attributes in file header */
483 void perf_event__attr_swap(struct perf_event_attr *attr)
484 {
485 	attr->type		= bswap_32(attr->type);
486 	attr->size		= bswap_32(attr->size);
487 
488 #define bswap_safe(f, n) 					\
489 	(attr->size > (offsetof(struct perf_event_attr, f) + 	\
490 		       sizeof(attr->f) * (n)))
491 #define bswap_field(f, sz) 			\
492 do { 						\
493 	if (bswap_safe(f, 0))			\
494 		attr->f = bswap_##sz(attr->f);	\
495 } while(0)
496 #define bswap_field_16(f) bswap_field(f, 16)
497 #define bswap_field_32(f) bswap_field(f, 32)
498 #define bswap_field_64(f) bswap_field(f, 64)
499 
500 	bswap_field_64(config);
501 	bswap_field_64(sample_period);
502 	bswap_field_64(sample_type);
503 	bswap_field_64(read_format);
504 	bswap_field_32(wakeup_events);
505 	bswap_field_32(bp_type);
506 	bswap_field_64(bp_addr);
507 	bswap_field_64(bp_len);
508 	bswap_field_64(branch_sample_type);
509 	bswap_field_64(sample_regs_user);
510 	bswap_field_32(sample_stack_user);
511 	bswap_field_32(aux_watermark);
512 	bswap_field_16(sample_max_stack);
513 	bswap_field_32(aux_sample_size);
514 
515 	/*
516 	 * After read_format are bitfields. Check read_format because
517 	 * we are unable to use offsetof on bitfield.
518 	 */
519 	if (bswap_safe(read_format, 1))
520 		swap_bitfield((u8 *) (&attr->read_format + 1),
521 			      sizeof(u64));
522 #undef bswap_field_64
523 #undef bswap_field_32
524 #undef bswap_field
525 #undef bswap_safe
526 }
527 
528 static void perf_event__hdr_attr_swap(union perf_event *event,
529 				      bool sample_id_all __maybe_unused)
530 {
531 	size_t size;
532 
533 	perf_event__attr_swap(&event->attr.attr);
534 
535 	size = event->header.size;
536 	size -= perf_record_header_attr_id(event) - (void *)event;
537 	mem_bswap_64(perf_record_header_attr_id(event), size);
538 }
539 
540 static void perf_event__event_update_swap(union perf_event *event,
541 					  bool sample_id_all __maybe_unused)
542 {
543 	event->event_update.type = bswap_64(event->event_update.type);
544 	event->event_update.id   = bswap_64(event->event_update.id);
545 }
546 
547 static void perf_event__event_type_swap(union perf_event *event,
548 					bool sample_id_all __maybe_unused)
549 {
550 	event->event_type.event_type.event_id =
551 		bswap_64(event->event_type.event_type.event_id);
552 }
553 
554 static void perf_event__tracing_data_swap(union perf_event *event,
555 					  bool sample_id_all __maybe_unused)
556 {
557 	event->tracing_data.size = bswap_32(event->tracing_data.size);
558 }
559 
560 static void perf_event__auxtrace_info_swap(union perf_event *event,
561 					   bool sample_id_all __maybe_unused)
562 {
563 	size_t size;
564 
565 	event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
566 
567 	size = event->header.size;
568 	size -= (void *)&event->auxtrace_info.priv - (void *)event;
569 	mem_bswap_64(event->auxtrace_info.priv, size);
570 }
571 
572 static void perf_event__auxtrace_swap(union perf_event *event,
573 				      bool sample_id_all __maybe_unused)
574 {
575 	event->auxtrace.size      = bswap_64(event->auxtrace.size);
576 	event->auxtrace.offset    = bswap_64(event->auxtrace.offset);
577 	event->auxtrace.reference = bswap_64(event->auxtrace.reference);
578 	event->auxtrace.idx       = bswap_32(event->auxtrace.idx);
579 	event->auxtrace.tid       = bswap_32(event->auxtrace.tid);
580 	event->auxtrace.cpu       = bswap_32(event->auxtrace.cpu);
581 }
582 
583 static void perf_event__auxtrace_error_swap(union perf_event *event,
584 					    bool sample_id_all __maybe_unused)
585 {
586 	event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
587 	event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
588 	event->auxtrace_error.cpu  = bswap_32(event->auxtrace_error.cpu);
589 	event->auxtrace_error.pid  = bswap_32(event->auxtrace_error.pid);
590 	event->auxtrace_error.tid  = bswap_32(event->auxtrace_error.tid);
591 	event->auxtrace_error.fmt  = bswap_32(event->auxtrace_error.fmt);
592 	event->auxtrace_error.ip   = bswap_64(event->auxtrace_error.ip);
593 	if (event->auxtrace_error.fmt)
594 		event->auxtrace_error.time = bswap_64(event->auxtrace_error.time);
595 	if (event->auxtrace_error.fmt >= 2) {
596 		event->auxtrace_error.machine_pid = bswap_32(event->auxtrace_error.machine_pid);
597 		event->auxtrace_error.vcpu = bswap_32(event->auxtrace_error.vcpu);
598 	}
599 }
600 
601 static void perf_event__thread_map_swap(union perf_event *event,
602 					bool sample_id_all __maybe_unused)
603 {
604 	unsigned i;
605 
606 	event->thread_map.nr = bswap_64(event->thread_map.nr);
607 
608 	for (i = 0; i < event->thread_map.nr; i++)
609 		event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
610 }
611 
612 static void perf_event__cpu_map_swap(union perf_event *event,
613 				     bool sample_id_all __maybe_unused)
614 {
615 	struct perf_record_cpu_map_data *data = &event->cpu_map.data;
616 
617 	data->type = bswap_16(data->type);
618 
619 	switch (data->type) {
620 	case PERF_CPU_MAP__CPUS:
621 		data->cpus_data.nr = bswap_16(data->cpus_data.nr);
622 
623 		for (unsigned i = 0; i < data->cpus_data.nr; i++)
624 			data->cpus_data.cpu[i] = bswap_16(data->cpus_data.cpu[i]);
625 		break;
626 	case PERF_CPU_MAP__MASK:
627 		data->mask32_data.long_size = bswap_16(data->mask32_data.long_size);
628 
629 		switch (data->mask32_data.long_size) {
630 		case 4:
631 			data->mask32_data.nr = bswap_16(data->mask32_data.nr);
632 			for (unsigned i = 0; i < data->mask32_data.nr; i++)
633 				data->mask32_data.mask[i] = bswap_32(data->mask32_data.mask[i]);
634 			break;
635 		case 8:
636 			data->mask64_data.nr = bswap_16(data->mask64_data.nr);
637 			for (unsigned i = 0; i < data->mask64_data.nr; i++)
638 				data->mask64_data.mask[i] = bswap_64(data->mask64_data.mask[i]);
639 			break;
640 		default:
641 			pr_err("cpu_map swap: unsupported long size\n");
642 		}
643 		break;
644 	case PERF_CPU_MAP__RANGE_CPUS:
645 		data->range_cpu_data.start_cpu = bswap_16(data->range_cpu_data.start_cpu);
646 		data->range_cpu_data.end_cpu = bswap_16(data->range_cpu_data.end_cpu);
647 		break;
648 	default:
649 		break;
650 	}
651 }
652 
653 static void perf_event__stat_config_swap(union perf_event *event,
654 					 bool sample_id_all __maybe_unused)
655 {
656 	u64 size;
657 
658 	size  = bswap_64(event->stat_config.nr) * sizeof(event->stat_config.data[0]);
659 	size += 1; /* nr item itself */
660 	mem_bswap_64(&event->stat_config.nr, size);
661 }
662 
663 static void perf_event__stat_swap(union perf_event *event,
664 				  bool sample_id_all __maybe_unused)
665 {
666 	event->stat.id     = bswap_64(event->stat.id);
667 	event->stat.thread = bswap_32(event->stat.thread);
668 	event->stat.cpu    = bswap_32(event->stat.cpu);
669 	event->stat.val    = bswap_64(event->stat.val);
670 	event->stat.ena    = bswap_64(event->stat.ena);
671 	event->stat.run    = bswap_64(event->stat.run);
672 }
673 
674 static void perf_event__stat_round_swap(union perf_event *event,
675 					bool sample_id_all __maybe_unused)
676 {
677 	event->stat_round.type = bswap_64(event->stat_round.type);
678 	event->stat_round.time = bswap_64(event->stat_round.time);
679 }
680 
681 static void perf_event__time_conv_swap(union perf_event *event,
682 				       bool sample_id_all __maybe_unused)
683 {
684 	event->time_conv.time_shift = bswap_64(event->time_conv.time_shift);
685 	event->time_conv.time_mult  = bswap_64(event->time_conv.time_mult);
686 	event->time_conv.time_zero  = bswap_64(event->time_conv.time_zero);
687 
688 	if (event_contains(event->time_conv, time_cycles)) {
689 		event->time_conv.time_cycles = bswap_64(event->time_conv.time_cycles);
690 		event->time_conv.time_mask = bswap_64(event->time_conv.time_mask);
691 	}
692 }
693 
694 typedef void (*perf_event__swap_op)(union perf_event *event,
695 				    bool sample_id_all);
696 
697 static perf_event__swap_op perf_event__swap_ops[] = {
698 	[PERF_RECORD_MMAP]		  = perf_event__mmap_swap,
699 	[PERF_RECORD_MMAP2]		  = perf_event__mmap2_swap,
700 	[PERF_RECORD_COMM]		  = perf_event__comm_swap,
701 	[PERF_RECORD_FORK]		  = perf_event__task_swap,
702 	[PERF_RECORD_EXIT]		  = perf_event__task_swap,
703 	[PERF_RECORD_LOST]		  = perf_event__all64_swap,
704 	[PERF_RECORD_READ]		  = perf_event__read_swap,
705 	[PERF_RECORD_THROTTLE]		  = perf_event__throttle_swap,
706 	[PERF_RECORD_UNTHROTTLE]	  = perf_event__throttle_swap,
707 	[PERF_RECORD_SAMPLE]		  = perf_event__all64_swap,
708 	[PERF_RECORD_AUX]		  = perf_event__aux_swap,
709 	[PERF_RECORD_ITRACE_START]	  = perf_event__itrace_start_swap,
710 	[PERF_RECORD_LOST_SAMPLES]	  = perf_event__all64_swap,
711 	[PERF_RECORD_SWITCH]		  = perf_event__switch_swap,
712 	[PERF_RECORD_SWITCH_CPU_WIDE]	  = perf_event__switch_swap,
713 	[PERF_RECORD_NAMESPACES]	  = perf_event__namespaces_swap,
714 	[PERF_RECORD_CGROUP]		  = perf_event__cgroup_swap,
715 	[PERF_RECORD_TEXT_POKE]		  = perf_event__text_poke_swap,
716 	[PERF_RECORD_AUX_OUTPUT_HW_ID]	  = perf_event__all64_swap,
717 	[PERF_RECORD_HEADER_ATTR]	  = perf_event__hdr_attr_swap,
718 	[PERF_RECORD_HEADER_EVENT_TYPE]	  = perf_event__event_type_swap,
719 	[PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
720 	[PERF_RECORD_HEADER_BUILD_ID]	  = NULL,
721 	[PERF_RECORD_ID_INDEX]		  = perf_event__all64_swap,
722 	[PERF_RECORD_AUXTRACE_INFO]	  = perf_event__auxtrace_info_swap,
723 	[PERF_RECORD_AUXTRACE]		  = perf_event__auxtrace_swap,
724 	[PERF_RECORD_AUXTRACE_ERROR]	  = perf_event__auxtrace_error_swap,
725 	[PERF_RECORD_THREAD_MAP]	  = perf_event__thread_map_swap,
726 	[PERF_RECORD_CPU_MAP]		  = perf_event__cpu_map_swap,
727 	[PERF_RECORD_STAT_CONFIG]	  = perf_event__stat_config_swap,
728 	[PERF_RECORD_STAT]		  = perf_event__stat_swap,
729 	[PERF_RECORD_STAT_ROUND]	  = perf_event__stat_round_swap,
730 	[PERF_RECORD_EVENT_UPDATE]	  = perf_event__event_update_swap,
731 	[PERF_RECORD_TIME_CONV]		  = perf_event__time_conv_swap,
732 	[PERF_RECORD_HEADER_MAX]	  = NULL,
733 };
734 
735 /*
736  * When perf record finishes a pass on every buffers, it records this pseudo
737  * event.
738  * We record the max timestamp t found in the pass n.
739  * Assuming these timestamps are monotonic across cpus, we know that if
740  * a buffer still has events with timestamps below t, they will be all
741  * available and then read in the pass n + 1.
742  * Hence when we start to read the pass n + 2, we can safely flush every
743  * events with timestamps below t.
744  *
745  *    ============ PASS n =================
746  *       CPU 0         |   CPU 1
747  *                     |
748  *    cnt1 timestamps  |   cnt2 timestamps
749  *          1          |         2
750  *          2          |         3
751  *          -          |         4  <--- max recorded
752  *
753  *    ============ PASS n + 1 ==============
754  *       CPU 0         |   CPU 1
755  *                     |
756  *    cnt1 timestamps  |   cnt2 timestamps
757  *          3          |         5
758  *          4          |         6
759  *          5          |         7 <---- max recorded
760  *
761  *      Flush every events below timestamp 4
762  *
763  *    ============ PASS n + 2 ==============
764  *       CPU 0         |   CPU 1
765  *                     |
766  *    cnt1 timestamps  |   cnt2 timestamps
767  *          6          |         8
768  *          7          |         9
769  *          -          |         10
770  *
771  *      Flush every events below timestamp 7
772  *      etc...
773  */
774 int perf_event__process_finished_round(const struct perf_tool *tool __maybe_unused,
775 				       union perf_event *event __maybe_unused,
776 				       struct ordered_events *oe)
777 {
778 	if (dump_trace)
779 		fprintf(stdout, "\n");
780 	return ordered_events__flush(oe, OE_FLUSH__ROUND);
781 }
782 
783 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
784 			      u64 timestamp, u64 file_offset, const char *file_path)
785 {
786 	return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset, file_path);
787 }
788 
789 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
790 {
791 	struct ip_callchain *callchain = sample->callchain;
792 	struct branch_stack *lbr_stack = sample->branch_stack;
793 	struct branch_entry *entries = perf_sample__branch_entries(sample);
794 	u64 kernel_callchain_nr = callchain->nr;
795 	unsigned int i;
796 
797 	for (i = 0; i < kernel_callchain_nr; i++) {
798 		if (callchain->ips[i] == PERF_CONTEXT_USER)
799 			break;
800 	}
801 
802 	if ((i != kernel_callchain_nr) && lbr_stack->nr) {
803 		u64 total_nr;
804 		/*
805 		 * LBR callstack can only get user call chain,
806 		 * i is kernel call chain number,
807 		 * 1 is PERF_CONTEXT_USER.
808 		 *
809 		 * The user call chain is stored in LBR registers.
810 		 * LBR are pair registers. The caller is stored
811 		 * in "from" register, while the callee is stored
812 		 * in "to" register.
813 		 * For example, there is a call stack
814 		 * "A"->"B"->"C"->"D".
815 		 * The LBR registers will be recorded like
816 		 * "C"->"D", "B"->"C", "A"->"B".
817 		 * So only the first "to" register and all "from"
818 		 * registers are needed to construct the whole stack.
819 		 */
820 		total_nr = i + 1 + lbr_stack->nr + 1;
821 		kernel_callchain_nr = i + 1;
822 
823 		printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
824 
825 		for (i = 0; i < kernel_callchain_nr; i++)
826 			printf("..... %2d: %016" PRIx64 "\n",
827 			       i, callchain->ips[i]);
828 
829 		printf("..... %2d: %016" PRIx64 "\n",
830 		       (int)(kernel_callchain_nr), entries[0].to);
831 		for (i = 0; i < lbr_stack->nr; i++)
832 			printf("..... %2d: %016" PRIx64 "\n",
833 			       (int)(i + kernel_callchain_nr + 1), entries[i].from);
834 	}
835 }
836 
837 static void callchain__printf(struct evsel *evsel,
838 			      struct perf_sample *sample)
839 {
840 	unsigned int i;
841 	struct ip_callchain *callchain = sample->callchain;
842 
843 	if (evsel__has_branch_callstack(evsel))
844 		callchain__lbr_callstack_printf(sample);
845 
846 	printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
847 
848 	for (i = 0; i < callchain->nr; i++)
849 		printf("..... %2d: %016" PRIx64 "\n",
850 		       i, callchain->ips[i]);
851 }
852 
853 static void branch_stack__printf(struct perf_sample *sample,
854 				 struct evsel *evsel)
855 {
856 	struct branch_entry *entries = perf_sample__branch_entries(sample);
857 	bool callstack = evsel__has_branch_callstack(evsel);
858 	u64 *branch_stack_cntr = sample->branch_stack_cntr;
859 	uint64_t i;
860 
861 	if (!callstack) {
862 		printf("%s: nr:%" PRIu64 "\n", "... branch stack", sample->branch_stack->nr);
863 	} else {
864 		/* the reason of adding 1 to nr is because after expanding
865 		 * branch stack it generates nr + 1 callstack records. e.g.,
866 		 *         B()->C()
867 		 *         A()->B()
868 		 * the final callstack should be:
869 		 *         C()
870 		 *         B()
871 		 *         A()
872 		 */
873 		printf("%s: nr:%" PRIu64 "\n", "... branch callstack", sample->branch_stack->nr+1);
874 	}
875 
876 	for (i = 0; i < sample->branch_stack->nr; i++) {
877 		struct branch_entry *e = &entries[i];
878 
879 		if (!callstack) {
880 			printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x %s %s\n",
881 				i, e->from, e->to,
882 				(unsigned short)e->flags.cycles,
883 				e->flags.mispred ? "M" : " ",
884 				e->flags.predicted ? "P" : " ",
885 				e->flags.abort ? "A" : " ",
886 				e->flags.in_tx ? "T" : " ",
887 				(unsigned)e->flags.reserved,
888 				get_branch_type(e),
889 				e->flags.spec ? branch_spec_desc(e->flags.spec) : "");
890 		} else {
891 			if (i == 0) {
892 				printf("..... %2"PRIu64": %016" PRIx64 "\n"
893 				       "..... %2"PRIu64": %016" PRIx64 "\n",
894 						i, e->to, i+1, e->from);
895 			} else {
896 				printf("..... %2"PRIu64": %016" PRIx64 "\n", i+1, e->from);
897 			}
898 		}
899 	}
900 
901 	if (branch_stack_cntr) {
902 		unsigned int br_cntr_width, br_cntr_nr;
903 
904 		perf_env__find_br_cntr_info(evsel__env(evsel), &br_cntr_nr, &br_cntr_width);
905 		printf("... branch stack counters: nr:%" PRIu64 " (counter width: %u max counter nr:%u)\n",
906 			sample->branch_stack->nr, br_cntr_width, br_cntr_nr);
907 		for (i = 0; i < sample->branch_stack->nr; i++)
908 			printf("..... %2"PRIu64": %016" PRIx64 "\n", i, branch_stack_cntr[i]);
909 	}
910 }
911 
912 static void regs_dump__printf(u64 mask, u64 *regs, const char *arch)
913 {
914 	unsigned rid, i = 0;
915 
916 	for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
917 		u64 val = regs[i++];
918 
919 		printf(".... %-5s 0x%016" PRIx64 "\n",
920 		       perf_reg_name(rid, arch), val);
921 	}
922 }
923 
924 static const char *regs_abi[] = {
925 	[PERF_SAMPLE_REGS_ABI_NONE] = "none",
926 	[PERF_SAMPLE_REGS_ABI_32] = "32-bit",
927 	[PERF_SAMPLE_REGS_ABI_64] = "64-bit",
928 };
929 
930 static inline const char *regs_dump_abi(struct regs_dump *d)
931 {
932 	if (d->abi > PERF_SAMPLE_REGS_ABI_64)
933 		return "unknown";
934 
935 	return regs_abi[d->abi];
936 }
937 
938 static void regs__printf(const char *type, struct regs_dump *regs, const char *arch)
939 {
940 	u64 mask = regs->mask;
941 
942 	printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
943 	       type,
944 	       mask,
945 	       regs_dump_abi(regs));
946 
947 	regs_dump__printf(mask, regs->regs, arch);
948 }
949 
950 static void regs_user__printf(struct perf_sample *sample, const char *arch)
951 {
952 	struct regs_dump *user_regs = &sample->user_regs;
953 
954 	if (user_regs->regs)
955 		regs__printf("user", user_regs, arch);
956 }
957 
958 static void regs_intr__printf(struct perf_sample *sample, const char *arch)
959 {
960 	struct regs_dump *intr_regs = &sample->intr_regs;
961 
962 	if (intr_regs->regs)
963 		regs__printf("intr", intr_regs, arch);
964 }
965 
966 static void stack_user__printf(struct stack_dump *dump)
967 {
968 	printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
969 	       dump->size, dump->offset);
970 }
971 
972 static void evlist__print_tstamp(struct evlist *evlist, union perf_event *event, struct perf_sample *sample)
973 {
974 	u64 sample_type = __evlist__combined_sample_type(evlist);
975 
976 	if (event->header.type != PERF_RECORD_SAMPLE &&
977 	    !evlist__sample_id_all(evlist)) {
978 		fputs("-1 -1 ", stdout);
979 		return;
980 	}
981 
982 	if ((sample_type & PERF_SAMPLE_CPU))
983 		printf("%u ", sample->cpu);
984 
985 	if (sample_type & PERF_SAMPLE_TIME)
986 		printf("%" PRIu64 " ", sample->time);
987 }
988 
989 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
990 {
991 	printf("... sample_read:\n");
992 
993 	if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
994 		printf("...... time enabled %016" PRIx64 "\n",
995 		       sample->read.time_enabled);
996 
997 	if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
998 		printf("...... time running %016" PRIx64 "\n",
999 		       sample->read.time_running);
1000 
1001 	if (read_format & PERF_FORMAT_GROUP) {
1002 		struct sample_read_value *value = sample->read.group.values;
1003 
1004 		printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1005 
1006 		sample_read_group__for_each(value, sample->read.group.nr, read_format) {
1007 			printf("..... id %016" PRIx64
1008 			       ", value %016" PRIx64,
1009 			       value->id, value->value);
1010 			if (read_format & PERF_FORMAT_LOST)
1011 				printf(", lost %" PRIu64, value->lost);
1012 			printf("\n");
1013 		}
1014 	} else {
1015 		printf("..... id %016" PRIx64 ", value %016" PRIx64,
1016 			sample->read.one.id, sample->read.one.value);
1017 		if (read_format & PERF_FORMAT_LOST)
1018 			printf(", lost %" PRIu64, sample->read.one.lost);
1019 		printf("\n");
1020 	}
1021 }
1022 
1023 static void dump_event(struct evlist *evlist, union perf_event *event,
1024 		       u64 file_offset, struct perf_sample *sample,
1025 		       const char *file_path)
1026 {
1027 	if (!dump_trace)
1028 		return;
1029 
1030 	printf("\n%#" PRIx64 "@%s [%#x]: event: %d\n",
1031 	       file_offset, file_path, event->header.size, event->header.type);
1032 
1033 	trace_event(event);
1034 	if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw)
1035 		evlist->trace_event_sample_raw(evlist, event, sample);
1036 
1037 	if (sample)
1038 		evlist__print_tstamp(evlist, event, sample);
1039 
1040 	printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1041 	       event->header.size, perf_event__name(event->header.type));
1042 }
1043 
1044 char *get_page_size_name(u64 size, char *str)
1045 {
1046 	if (!size || !unit_number__scnprintf(str, PAGE_SIZE_NAME_LEN, size))
1047 		snprintf(str, PAGE_SIZE_NAME_LEN, "%s", "N/A");
1048 
1049 	return str;
1050 }
1051 
1052 static void dump_sample(struct evsel *evsel, union perf_event *event,
1053 			struct perf_sample *sample, const char *arch)
1054 {
1055 	u64 sample_type;
1056 	char str[PAGE_SIZE_NAME_LEN];
1057 
1058 	if (!dump_trace)
1059 		return;
1060 
1061 	printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1062 	       event->header.misc, sample->pid, sample->tid, sample->ip,
1063 	       sample->period, sample->addr);
1064 
1065 	sample_type = evsel->core.attr.sample_type;
1066 
1067 	if (evsel__has_callchain(evsel))
1068 		callchain__printf(evsel, sample);
1069 
1070 	if (evsel__has_br_stack(evsel))
1071 		branch_stack__printf(sample, evsel);
1072 
1073 	if (sample_type & PERF_SAMPLE_REGS_USER)
1074 		regs_user__printf(sample, arch);
1075 
1076 	if (sample_type & PERF_SAMPLE_REGS_INTR)
1077 		regs_intr__printf(sample, arch);
1078 
1079 	if (sample_type & PERF_SAMPLE_STACK_USER)
1080 		stack_user__printf(&sample->user_stack);
1081 
1082 	if (sample_type & PERF_SAMPLE_WEIGHT_TYPE) {
1083 		printf("... weight: %" PRIu64 "", sample->weight);
1084 			if (sample_type & PERF_SAMPLE_WEIGHT_STRUCT) {
1085 				printf(",0x%"PRIx16"", sample->ins_lat);
1086 				printf(",0x%"PRIx16"", sample->p_stage_cyc);
1087 			}
1088 		printf("\n");
1089 	}
1090 
1091 	if (sample_type & PERF_SAMPLE_DATA_SRC)
1092 		printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1093 
1094 	if (sample_type & PERF_SAMPLE_PHYS_ADDR)
1095 		printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
1096 
1097 	if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)
1098 		printf(" .. data page size: %s\n", get_page_size_name(sample->data_page_size, str));
1099 
1100 	if (sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)
1101 		printf(" .. code page size: %s\n", get_page_size_name(sample->code_page_size, str));
1102 
1103 	if (sample_type & PERF_SAMPLE_TRANSACTION)
1104 		printf("... transaction: %" PRIx64 "\n", sample->transaction);
1105 
1106 	if (sample_type & PERF_SAMPLE_READ)
1107 		sample_read__printf(sample, evsel->core.attr.read_format);
1108 }
1109 
1110 static void dump_read(struct evsel *evsel, union perf_event *event)
1111 {
1112 	struct perf_record_read *read_event = &event->read;
1113 	u64 read_format;
1114 
1115 	if (!dump_trace)
1116 		return;
1117 
1118 	printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid,
1119 	       evsel__name(evsel), event->read.value);
1120 
1121 	if (!evsel)
1122 		return;
1123 
1124 	read_format = evsel->core.attr.read_format;
1125 
1126 	if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1127 		printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled);
1128 
1129 	if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1130 		printf("... time running : %" PRI_lu64 "\n", read_event->time_running);
1131 
1132 	if (read_format & PERF_FORMAT_ID)
1133 		printf("... id           : %" PRI_lu64 "\n", read_event->id);
1134 
1135 	if (read_format & PERF_FORMAT_LOST)
1136 		printf("... lost         : %" PRI_lu64 "\n", read_event->lost);
1137 }
1138 
1139 static struct machine *machines__find_for_cpumode(struct machines *machines,
1140 					       union perf_event *event,
1141 					       struct perf_sample *sample)
1142 {
1143 	if (perf_guest &&
1144 	    ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1145 	     (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1146 		u32 pid;
1147 
1148 		if (sample->machine_pid)
1149 			pid = sample->machine_pid;
1150 		else if (event->header.type == PERF_RECORD_MMAP
1151 		    || event->header.type == PERF_RECORD_MMAP2)
1152 			pid = event->mmap.pid;
1153 		else
1154 			pid = sample->pid;
1155 
1156 		/*
1157 		 * Guest code machine is created as needed and does not use
1158 		 * DEFAULT_GUEST_KERNEL_ID.
1159 		 */
1160 		if (symbol_conf.guest_code)
1161 			return machines__findnew(machines, pid);
1162 
1163 		return machines__find_guest(machines, pid);
1164 	}
1165 
1166 	return &machines->host;
1167 }
1168 
1169 static int deliver_sample_value(struct evlist *evlist,
1170 				const struct perf_tool *tool,
1171 				union perf_event *event,
1172 				struct perf_sample *sample,
1173 				struct sample_read_value *v,
1174 				struct machine *machine,
1175 				bool per_thread)
1176 {
1177 	struct perf_sample_id *sid = evlist__id2sid(evlist, v->id);
1178 	struct evsel *evsel;
1179 	u64 *storage = NULL;
1180 
1181 	if (sid) {
1182 		storage = perf_sample_id__get_period_storage(sid, sample->tid, per_thread);
1183 	}
1184 
1185 	if (storage) {
1186 		sample->id     = v->id;
1187 		sample->period = v->value - *storage;
1188 		*storage       = v->value;
1189 	}
1190 
1191 	if (!storage || sid->evsel == NULL) {
1192 		++evlist->stats.nr_unknown_id;
1193 		return 0;
1194 	}
1195 
1196 	/*
1197 	 * There's no reason to deliver sample
1198 	 * for zero period, bail out.
1199 	 */
1200 	if (!sample->period)
1201 		return 0;
1202 
1203 	evsel = container_of(sid->evsel, struct evsel, core);
1204 	return tool->sample(tool, event, sample, evsel, machine);
1205 }
1206 
1207 static int deliver_sample_group(struct evlist *evlist,
1208 				const struct perf_tool *tool,
1209 				union  perf_event *event,
1210 				struct perf_sample *sample,
1211 				struct machine *machine,
1212 				u64 read_format,
1213 				bool per_thread)
1214 {
1215 	int ret = -EINVAL;
1216 	struct sample_read_value *v = sample->read.group.values;
1217 
1218 	if (tool->dont_split_sample_group)
1219 		return deliver_sample_value(evlist, tool, event, sample, v, machine,
1220 					    per_thread);
1221 
1222 	sample_read_group__for_each(v, sample->read.group.nr, read_format) {
1223 		ret = deliver_sample_value(evlist, tool, event, sample, v,
1224 					   machine, per_thread);
1225 		if (ret)
1226 			break;
1227 	}
1228 
1229 	return ret;
1230 }
1231 
1232 static int evlist__deliver_sample(struct evlist *evlist, const struct perf_tool *tool,
1233 				  union  perf_event *event, struct perf_sample *sample,
1234 				  struct evsel *evsel, struct machine *machine)
1235 {
1236 	/* We know evsel != NULL. */
1237 	u64 sample_type = evsel->core.attr.sample_type;
1238 	u64 read_format = evsel->core.attr.read_format;
1239 	bool per_thread = perf_evsel__attr_has_per_thread_sample_period(&evsel->core);
1240 
1241 	/* Standard sample delivery. */
1242 	if (!(sample_type & PERF_SAMPLE_READ))
1243 		return tool->sample(tool, event, sample, evsel, machine);
1244 
1245 	/* For PERF_SAMPLE_READ we have either single or group mode. */
1246 	if (read_format & PERF_FORMAT_GROUP)
1247 		return deliver_sample_group(evlist, tool, event, sample,
1248 					    machine, read_format, per_thread);
1249 	else
1250 		return deliver_sample_value(evlist, tool, event, sample,
1251 					    &sample->read.one, machine,
1252 					    per_thread);
1253 }
1254 
1255 static int machines__deliver_event(struct machines *machines,
1256 				   struct evlist *evlist,
1257 				   union perf_event *event,
1258 				   struct perf_sample *sample,
1259 				   const struct perf_tool *tool, u64 file_offset,
1260 				   const char *file_path)
1261 {
1262 	struct evsel *evsel;
1263 	struct machine *machine;
1264 
1265 	dump_event(evlist, event, file_offset, sample, file_path);
1266 
1267 	evsel = evlist__id2evsel(evlist, sample->id);
1268 
1269 	machine = machines__find_for_cpumode(machines, event, sample);
1270 
1271 	switch (event->header.type) {
1272 	case PERF_RECORD_SAMPLE:
1273 		if (evsel == NULL) {
1274 			++evlist->stats.nr_unknown_id;
1275 			return 0;
1276 		}
1277 		if (machine == NULL) {
1278 			++evlist->stats.nr_unprocessable_samples;
1279 			dump_sample(evsel, event, sample, perf_env__arch(NULL));
1280 			return 0;
1281 		}
1282 		dump_sample(evsel, event, sample, perf_env__arch(machine->env));
1283 		return evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1284 	case PERF_RECORD_MMAP:
1285 		return tool->mmap(tool, event, sample, machine);
1286 	case PERF_RECORD_MMAP2:
1287 		if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1288 			++evlist->stats.nr_proc_map_timeout;
1289 		return tool->mmap2(tool, event, sample, machine);
1290 	case PERF_RECORD_COMM:
1291 		return tool->comm(tool, event, sample, machine);
1292 	case PERF_RECORD_NAMESPACES:
1293 		return tool->namespaces(tool, event, sample, machine);
1294 	case PERF_RECORD_CGROUP:
1295 		return tool->cgroup(tool, event, sample, machine);
1296 	case PERF_RECORD_FORK:
1297 		return tool->fork(tool, event, sample, machine);
1298 	case PERF_RECORD_EXIT:
1299 		return tool->exit(tool, event, sample, machine);
1300 	case PERF_RECORD_LOST:
1301 		if (tool->lost == perf_event__process_lost)
1302 			evlist->stats.total_lost += event->lost.lost;
1303 		return tool->lost(tool, event, sample, machine);
1304 	case PERF_RECORD_LOST_SAMPLES:
1305 		if (event->header.misc & PERF_RECORD_MISC_LOST_SAMPLES_BPF)
1306 			evlist->stats.total_dropped_samples += event->lost_samples.lost;
1307 		else if (tool->lost_samples == perf_event__process_lost_samples)
1308 			evlist->stats.total_lost_samples += event->lost_samples.lost;
1309 		return tool->lost_samples(tool, event, sample, machine);
1310 	case PERF_RECORD_READ:
1311 		dump_read(evsel, event);
1312 		return tool->read(tool, event, sample, evsel, machine);
1313 	case PERF_RECORD_THROTTLE:
1314 		return tool->throttle(tool, event, sample, machine);
1315 	case PERF_RECORD_UNTHROTTLE:
1316 		return tool->unthrottle(tool, event, sample, machine);
1317 	case PERF_RECORD_AUX:
1318 		if (tool->aux == perf_event__process_aux) {
1319 			if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1320 				evlist->stats.total_aux_lost += 1;
1321 			if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1322 				evlist->stats.total_aux_partial += 1;
1323 			if (event->aux.flags & PERF_AUX_FLAG_COLLISION)
1324 				evlist->stats.total_aux_collision += 1;
1325 		}
1326 		return tool->aux(tool, event, sample, machine);
1327 	case PERF_RECORD_ITRACE_START:
1328 		return tool->itrace_start(tool, event, sample, machine);
1329 	case PERF_RECORD_SWITCH:
1330 	case PERF_RECORD_SWITCH_CPU_WIDE:
1331 		return tool->context_switch(tool, event, sample, machine);
1332 	case PERF_RECORD_KSYMBOL:
1333 		return tool->ksymbol(tool, event, sample, machine);
1334 	case PERF_RECORD_BPF_EVENT:
1335 		return tool->bpf(tool, event, sample, machine);
1336 	case PERF_RECORD_TEXT_POKE:
1337 		return tool->text_poke(tool, event, sample, machine);
1338 	case PERF_RECORD_AUX_OUTPUT_HW_ID:
1339 		return tool->aux_output_hw_id(tool, event, sample, machine);
1340 	default:
1341 		++evlist->stats.nr_unknown_events;
1342 		return -1;
1343 	}
1344 }
1345 
1346 static int perf_session__deliver_event(struct perf_session *session,
1347 				       union perf_event *event,
1348 				       const struct perf_tool *tool,
1349 				       u64 file_offset,
1350 				       const char *file_path)
1351 {
1352 	struct perf_sample sample;
1353 	int ret = evlist__parse_sample(session->evlist, event, &sample);
1354 
1355 	if (ret) {
1356 		pr_err("Can't parse sample, err = %d\n", ret);
1357 		return ret;
1358 	}
1359 
1360 	ret = auxtrace__process_event(session, event, &sample, tool);
1361 	if (ret < 0)
1362 		return ret;
1363 	if (ret > 0)
1364 		return 0;
1365 
1366 	ret = machines__deliver_event(&session->machines, session->evlist,
1367 				      event, &sample, tool, file_offset, file_path);
1368 
1369 	if (dump_trace && sample.aux_sample.size)
1370 		auxtrace__dump_auxtrace_sample(session, &sample);
1371 
1372 	return ret;
1373 }
1374 
1375 static s64 perf_session__process_user_event(struct perf_session *session,
1376 					    union perf_event *event,
1377 					    u64 file_offset,
1378 					    const char *file_path)
1379 {
1380 	struct ordered_events *oe = &session->ordered_events;
1381 	const struct perf_tool *tool = session->tool;
1382 	struct perf_sample sample = { .time = 0, };
1383 	int fd = perf_data__fd(session->data);
1384 	int err;
1385 
1386 	if (event->header.type != PERF_RECORD_COMPRESSED || perf_tool__compressed_is_stub(tool))
1387 		dump_event(session->evlist, event, file_offset, &sample, file_path);
1388 
1389 	/* These events are processed right away */
1390 	switch (event->header.type) {
1391 	case PERF_RECORD_HEADER_ATTR:
1392 		err = tool->attr(tool, event, &session->evlist);
1393 		if (err == 0) {
1394 			perf_session__set_id_hdr_size(session);
1395 			perf_session__set_comm_exec(session);
1396 		}
1397 		return err;
1398 	case PERF_RECORD_EVENT_UPDATE:
1399 		return tool->event_update(tool, event, &session->evlist);
1400 	case PERF_RECORD_HEADER_EVENT_TYPE:
1401 		/*
1402 		 * Deprecated, but we need to handle it for sake
1403 		 * of old data files create in pipe mode.
1404 		 */
1405 		return 0;
1406 	case PERF_RECORD_HEADER_TRACING_DATA:
1407 		/*
1408 		 * Setup for reading amidst mmap, but only when we
1409 		 * are in 'file' mode. The 'pipe' fd is in proper
1410 		 * place already.
1411 		 */
1412 		if (!perf_data__is_pipe(session->data))
1413 			lseek(fd, file_offset, SEEK_SET);
1414 		return tool->tracing_data(session, event);
1415 	case PERF_RECORD_HEADER_BUILD_ID:
1416 		return tool->build_id(session, event);
1417 	case PERF_RECORD_FINISHED_ROUND:
1418 		return tool->finished_round(tool, event, oe);
1419 	case PERF_RECORD_ID_INDEX:
1420 		return tool->id_index(session, event);
1421 	case PERF_RECORD_AUXTRACE_INFO:
1422 		return tool->auxtrace_info(session, event);
1423 	case PERF_RECORD_AUXTRACE:
1424 		/*
1425 		 * Setup for reading amidst mmap, but only when we
1426 		 * are in 'file' mode.  The 'pipe' fd is in proper
1427 		 * place already.
1428 		 */
1429 		if (!perf_data__is_pipe(session->data))
1430 			lseek(fd, file_offset + event->header.size, SEEK_SET);
1431 		return tool->auxtrace(session, event);
1432 	case PERF_RECORD_AUXTRACE_ERROR:
1433 		perf_session__auxtrace_error_inc(session, event);
1434 		return tool->auxtrace_error(session, event);
1435 	case PERF_RECORD_THREAD_MAP:
1436 		return tool->thread_map(session, event);
1437 	case PERF_RECORD_CPU_MAP:
1438 		return tool->cpu_map(session, event);
1439 	case PERF_RECORD_STAT_CONFIG:
1440 		return tool->stat_config(session, event);
1441 	case PERF_RECORD_STAT:
1442 		return tool->stat(session, event);
1443 	case PERF_RECORD_STAT_ROUND:
1444 		return tool->stat_round(session, event);
1445 	case PERF_RECORD_TIME_CONV:
1446 		session->time_conv = event->time_conv;
1447 		return tool->time_conv(session, event);
1448 	case PERF_RECORD_HEADER_FEATURE:
1449 		return tool->feature(session, event);
1450 	case PERF_RECORD_COMPRESSED:
1451 		err = tool->compressed(session, event, file_offset, file_path);
1452 		if (err)
1453 			dump_event(session->evlist, event, file_offset, &sample, file_path);
1454 		return err;
1455 	case PERF_RECORD_FINISHED_INIT:
1456 		return tool->finished_init(session, event);
1457 	default:
1458 		return -EINVAL;
1459 	}
1460 }
1461 
1462 int perf_session__deliver_synth_event(struct perf_session *session,
1463 				      union perf_event *event,
1464 				      struct perf_sample *sample)
1465 {
1466 	struct evlist *evlist = session->evlist;
1467 	const struct perf_tool *tool = session->tool;
1468 
1469 	events_stats__inc(&evlist->stats, event->header.type);
1470 
1471 	if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1472 		return perf_session__process_user_event(session, event, 0, NULL);
1473 
1474 	return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0, NULL);
1475 }
1476 
1477 int perf_session__deliver_synth_attr_event(struct perf_session *session,
1478 					   const struct perf_event_attr *attr,
1479 					   u64 id)
1480 {
1481 	union {
1482 		struct {
1483 			struct perf_record_header_attr attr;
1484 			u64 ids[1];
1485 		} attr_id;
1486 		union perf_event ev;
1487 	} ev = {
1488 		.attr_id.attr.header.type = PERF_RECORD_HEADER_ATTR,
1489 		.attr_id.attr.header.size = sizeof(ev.attr_id),
1490 		.attr_id.ids[0] = id,
1491 	};
1492 
1493 	if (attr->size != sizeof(ev.attr_id.attr.attr)) {
1494 		pr_debug("Unexpected perf_event_attr size\n");
1495 		return -EINVAL;
1496 	}
1497 	ev.attr_id.attr.attr = *attr;
1498 	return perf_session__deliver_synth_event(session, &ev.ev, NULL);
1499 }
1500 
1501 static void event_swap(union perf_event *event, bool sample_id_all)
1502 {
1503 	perf_event__swap_op swap;
1504 
1505 	swap = perf_event__swap_ops[event->header.type];
1506 	if (swap)
1507 		swap(event, sample_id_all);
1508 }
1509 
1510 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1511 			     void *buf, size_t buf_sz,
1512 			     union perf_event **event_ptr,
1513 			     struct perf_sample *sample)
1514 {
1515 	union perf_event *event;
1516 	size_t hdr_sz, rest;
1517 	int fd;
1518 
1519 	if (session->one_mmap && !session->header.needs_swap) {
1520 		event = file_offset - session->one_mmap_offset +
1521 			session->one_mmap_addr;
1522 		goto out_parse_sample;
1523 	}
1524 
1525 	if (perf_data__is_pipe(session->data))
1526 		return -1;
1527 
1528 	fd = perf_data__fd(session->data);
1529 	hdr_sz = sizeof(struct perf_event_header);
1530 
1531 	if (buf_sz < hdr_sz)
1532 		return -1;
1533 
1534 	if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1535 	    readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1536 		return -1;
1537 
1538 	event = (union perf_event *)buf;
1539 
1540 	if (session->header.needs_swap)
1541 		perf_event_header__bswap(&event->header);
1542 
1543 	if (event->header.size < hdr_sz || event->header.size > buf_sz)
1544 		return -1;
1545 
1546 	buf += hdr_sz;
1547 	rest = event->header.size - hdr_sz;
1548 
1549 	if (readn(fd, buf, rest) != (ssize_t)rest)
1550 		return -1;
1551 
1552 	if (session->header.needs_swap)
1553 		event_swap(event, evlist__sample_id_all(session->evlist));
1554 
1555 out_parse_sample:
1556 
1557 	if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1558 	    evlist__parse_sample(session->evlist, event, sample))
1559 		return -1;
1560 
1561 	*event_ptr = event;
1562 
1563 	return 0;
1564 }
1565 
1566 int perf_session__peek_events(struct perf_session *session, u64 offset,
1567 			      u64 size, peek_events_cb_t cb, void *data)
1568 {
1569 	u64 max_offset = offset + size;
1570 	char buf[PERF_SAMPLE_MAX_SIZE];
1571 	union perf_event *event;
1572 	int err;
1573 
1574 	do {
1575 		err = perf_session__peek_event(session, offset, buf,
1576 					       PERF_SAMPLE_MAX_SIZE, &event,
1577 					       NULL);
1578 		if (err)
1579 			return err;
1580 
1581 		err = cb(session, event, offset, data);
1582 		if (err)
1583 			return err;
1584 
1585 		offset += event->header.size;
1586 		if (event->header.type == PERF_RECORD_AUXTRACE)
1587 			offset += event->auxtrace.size;
1588 
1589 	} while (offset < max_offset);
1590 
1591 	return err;
1592 }
1593 
1594 static s64 perf_session__process_event(struct perf_session *session,
1595 				       union perf_event *event, u64 file_offset,
1596 				       const char *file_path)
1597 {
1598 	struct evlist *evlist = session->evlist;
1599 	const struct perf_tool *tool = session->tool;
1600 	int ret;
1601 
1602 	if (session->header.needs_swap)
1603 		event_swap(event, evlist__sample_id_all(evlist));
1604 
1605 	if (event->header.type >= PERF_RECORD_HEADER_MAX)
1606 		return -EINVAL;
1607 
1608 	events_stats__inc(&evlist->stats, event->header.type);
1609 
1610 	if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1611 		return perf_session__process_user_event(session, event, file_offset, file_path);
1612 
1613 	if (tool->ordered_events) {
1614 		u64 timestamp = -1ULL;
1615 
1616 		ret = evlist__parse_sample_timestamp(evlist, event, &timestamp);
1617 		if (ret && ret != -1)
1618 			return ret;
1619 
1620 		ret = perf_session__queue_event(session, event, timestamp, file_offset, file_path);
1621 		if (ret != -ETIME)
1622 			return ret;
1623 	}
1624 
1625 	return perf_session__deliver_event(session, event, tool, file_offset, file_path);
1626 }
1627 
1628 void perf_event_header__bswap(struct perf_event_header *hdr)
1629 {
1630 	hdr->type = bswap_32(hdr->type);
1631 	hdr->misc = bswap_16(hdr->misc);
1632 	hdr->size = bswap_16(hdr->size);
1633 }
1634 
1635 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1636 {
1637 	return machine__findnew_thread(&session->machines.host, -1, pid);
1638 }
1639 
1640 int perf_session__register_idle_thread(struct perf_session *session)
1641 {
1642 	struct thread *thread = machine__idle_thread(&session->machines.host);
1643 
1644 	/* machine__idle_thread() got the thread, so put it */
1645 	thread__put(thread);
1646 	return thread ? 0 : -1;
1647 }
1648 
1649 static void
1650 perf_session__warn_order(const struct perf_session *session)
1651 {
1652 	const struct ordered_events *oe = &session->ordered_events;
1653 	struct evsel *evsel;
1654 	bool should_warn = true;
1655 
1656 	evlist__for_each_entry(session->evlist, evsel) {
1657 		if (evsel->core.attr.write_backward)
1658 			should_warn = false;
1659 	}
1660 
1661 	if (!should_warn)
1662 		return;
1663 	if (oe->nr_unordered_events != 0)
1664 		ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1665 }
1666 
1667 static void perf_session__warn_about_errors(const struct perf_session *session)
1668 {
1669 	const struct events_stats *stats = &session->evlist->stats;
1670 
1671 	if (session->tool->lost == perf_event__process_lost &&
1672 	    stats->nr_events[PERF_RECORD_LOST] != 0) {
1673 		ui__warning("Processed %d events and lost %d chunks!\n\n"
1674 			    "Check IO/CPU overload!\n\n",
1675 			    stats->nr_events[0],
1676 			    stats->nr_events[PERF_RECORD_LOST]);
1677 	}
1678 
1679 	if (session->tool->lost_samples == perf_event__process_lost_samples) {
1680 		double drop_rate;
1681 
1682 		drop_rate = (double)stats->total_lost_samples /
1683 			    (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1684 		if (drop_rate > 0.05) {
1685 			ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n",
1686 				    stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1687 				    drop_rate * 100.0);
1688 		}
1689 	}
1690 
1691 	if (session->tool->aux == perf_event__process_aux &&
1692 	    stats->total_aux_lost != 0) {
1693 		ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1694 			    stats->total_aux_lost,
1695 			    stats->nr_events[PERF_RECORD_AUX]);
1696 	}
1697 
1698 	if (session->tool->aux == perf_event__process_aux &&
1699 	    stats->total_aux_partial != 0) {
1700 		bool vmm_exclusive = false;
1701 
1702 		(void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1703 		                       &vmm_exclusive);
1704 
1705 		ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1706 		            "Are you running a KVM guest in the background?%s\n\n",
1707 			    stats->total_aux_partial,
1708 			    stats->nr_events[PERF_RECORD_AUX],
1709 			    vmm_exclusive ?
1710 			    "\nReloading kvm_intel module with vmm_exclusive=0\n"
1711 			    "will reduce the gaps to only guest's timeslices." :
1712 			    "");
1713 	}
1714 
1715 	if (session->tool->aux == perf_event__process_aux &&
1716 	    stats->total_aux_collision != 0) {
1717 		ui__warning("AUX data detected collision  %" PRIu64 " times out of %u!\n\n",
1718 			    stats->total_aux_collision,
1719 			    stats->nr_events[PERF_RECORD_AUX]);
1720 	}
1721 
1722 	if (stats->nr_unknown_events != 0) {
1723 		ui__warning("Found %u unknown events!\n\n"
1724 			    "Is this an older tool processing a perf.data "
1725 			    "file generated by a more recent tool?\n\n"
1726 			    "If that is not the case, consider "
1727 			    "reporting to linux-kernel@vger.kernel.org.\n\n",
1728 			    stats->nr_unknown_events);
1729 	}
1730 
1731 	if (stats->nr_unknown_id != 0) {
1732 		ui__warning("%u samples with id not present in the header\n",
1733 			    stats->nr_unknown_id);
1734 	}
1735 
1736 	if (stats->nr_invalid_chains != 0) {
1737 		ui__warning("Found invalid callchains!\n\n"
1738 			    "%u out of %u events were discarded for this reason.\n\n"
1739 			    "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1740 			    stats->nr_invalid_chains,
1741 			    stats->nr_events[PERF_RECORD_SAMPLE]);
1742 	}
1743 
1744 	if (stats->nr_unprocessable_samples != 0) {
1745 		ui__warning("%u unprocessable samples recorded.\n"
1746 			    "Do you have a KVM guest running and not using 'perf kvm'?\n",
1747 			    stats->nr_unprocessable_samples);
1748 	}
1749 
1750 	perf_session__warn_order(session);
1751 
1752 	events_stats__auxtrace_error_warn(stats);
1753 
1754 	if (stats->nr_proc_map_timeout != 0) {
1755 		ui__warning("%d map information files for pre-existing threads were\n"
1756 			    "not processed, if there are samples for addresses they\n"
1757 			    "will not be resolved, you may find out which are these\n"
1758 			    "threads by running with -v and redirecting the output\n"
1759 			    "to a file.\n"
1760 			    "The time limit to process proc map is too short?\n"
1761 			    "Increase it by --proc-map-timeout\n",
1762 			    stats->nr_proc_map_timeout);
1763 	}
1764 }
1765 
1766 static int perf_session__flush_thread_stack(struct thread *thread,
1767 					    void *p __maybe_unused)
1768 {
1769 	return thread_stack__flush(thread);
1770 }
1771 
1772 static int perf_session__flush_thread_stacks(struct perf_session *session)
1773 {
1774 	return machines__for_each_thread(&session->machines,
1775 					 perf_session__flush_thread_stack,
1776 					 NULL);
1777 }
1778 
1779 volatile sig_atomic_t session_done;
1780 
1781 static int __perf_session__process_decomp_events(struct perf_session *session);
1782 
1783 static int __perf_session__process_pipe_events(struct perf_session *session)
1784 {
1785 	struct ordered_events *oe = &session->ordered_events;
1786 	const struct perf_tool *tool = session->tool;
1787 	struct ui_progress prog;
1788 	union perf_event *event;
1789 	uint32_t size, cur_size = 0;
1790 	void *buf = NULL;
1791 	s64 skip = 0;
1792 	u64 head;
1793 	ssize_t err;
1794 	void *p;
1795 	bool update_prog = false;
1796 
1797 	/*
1798 	 * If it's from a file saving pipe data (by redirection), it would have
1799 	 * a file name other than "-".  Then we can get the total size and show
1800 	 * the progress.
1801 	 */
1802 	if (strcmp(session->data->path, "-") && session->data->file.size) {
1803 		ui_progress__init_size(&prog, session->data->file.size,
1804 				       "Processing events...");
1805 		update_prog = true;
1806 	}
1807 
1808 	head = 0;
1809 	cur_size = sizeof(union perf_event);
1810 
1811 	buf = malloc(cur_size);
1812 	if (!buf)
1813 		return -errno;
1814 	ordered_events__set_copy_on_queue(oe, true);
1815 more:
1816 	event = buf;
1817 	err = perf_data__read(session->data, event,
1818 			      sizeof(struct perf_event_header));
1819 	if (err <= 0) {
1820 		if (err == 0)
1821 			goto done;
1822 
1823 		pr_err("failed to read event header\n");
1824 		goto out_err;
1825 	}
1826 
1827 	if (session->header.needs_swap)
1828 		perf_event_header__bswap(&event->header);
1829 
1830 	size = event->header.size;
1831 	if (size < sizeof(struct perf_event_header)) {
1832 		pr_err("bad event header size\n");
1833 		goto out_err;
1834 	}
1835 
1836 	if (size > cur_size) {
1837 		void *new = realloc(buf, size);
1838 		if (!new) {
1839 			pr_err("failed to allocate memory to read event\n");
1840 			goto out_err;
1841 		}
1842 		buf = new;
1843 		cur_size = size;
1844 		event = buf;
1845 	}
1846 	p = event;
1847 	p += sizeof(struct perf_event_header);
1848 
1849 	if (size - sizeof(struct perf_event_header)) {
1850 		err = perf_data__read(session->data, p,
1851 				      size - sizeof(struct perf_event_header));
1852 		if (err <= 0) {
1853 			if (err == 0) {
1854 				pr_err("unexpected end of event stream\n");
1855 				goto done;
1856 			}
1857 
1858 			pr_err("failed to read event data\n");
1859 			goto out_err;
1860 		}
1861 	}
1862 
1863 	if ((skip = perf_session__process_event(session, event, head, "pipe")) < 0) {
1864 		pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1865 		       head, event->header.size, event->header.type);
1866 		err = -EINVAL;
1867 		goto out_err;
1868 	}
1869 
1870 	head += size;
1871 
1872 	if (skip > 0)
1873 		head += skip;
1874 
1875 	err = __perf_session__process_decomp_events(session);
1876 	if (err)
1877 		goto out_err;
1878 
1879 	if (update_prog)
1880 		ui_progress__update(&prog, size);
1881 
1882 	if (!session_done())
1883 		goto more;
1884 done:
1885 	/* do the final flush for ordered samples */
1886 	err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1887 	if (err)
1888 		goto out_err;
1889 	err = auxtrace__flush_events(session, tool);
1890 	if (err)
1891 		goto out_err;
1892 	err = perf_session__flush_thread_stacks(session);
1893 out_err:
1894 	free(buf);
1895 	if (update_prog)
1896 		ui_progress__finish();
1897 	if (!tool->no_warn)
1898 		perf_session__warn_about_errors(session);
1899 	ordered_events__free(&session->ordered_events);
1900 	auxtrace__free_events(session);
1901 	return err;
1902 }
1903 
1904 static union perf_event *
1905 prefetch_event(char *buf, u64 head, size_t mmap_size,
1906 	       bool needs_swap, union perf_event *error)
1907 {
1908 	union perf_event *event;
1909 	u16 event_size;
1910 
1911 	/*
1912 	 * Ensure we have enough space remaining to read
1913 	 * the size of the event in the headers.
1914 	 */
1915 	if (head + sizeof(event->header) > mmap_size)
1916 		return NULL;
1917 
1918 	event = (union perf_event *)(buf + head);
1919 	if (needs_swap)
1920 		perf_event_header__bswap(&event->header);
1921 
1922 	event_size = event->header.size;
1923 	if (head + event_size <= mmap_size)
1924 		return event;
1925 
1926 	/* We're not fetching the event so swap back again */
1927 	if (needs_swap)
1928 		perf_event_header__bswap(&event->header);
1929 
1930 	/* Check if the event fits into the next mmapped buf. */
1931 	if (event_size <= mmap_size - head % page_size) {
1932 		/* Remap buf and fetch again. */
1933 		return NULL;
1934 	}
1935 
1936 	/* Invalid input. Event size should never exceed mmap_size. */
1937 	pr_debug("%s: head=%#" PRIx64 " event->header.size=%#x, mmap_size=%#zx:"
1938 		 " fuzzed or compressed perf.data?\n", __func__, head, event_size, mmap_size);
1939 
1940 	return error;
1941 }
1942 
1943 static union perf_event *
1944 fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
1945 {
1946 	return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL));
1947 }
1948 
1949 static union perf_event *
1950 fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
1951 {
1952 	return prefetch_event(buf, head, mmap_size, needs_swap, NULL);
1953 }
1954 
1955 static int __perf_session__process_decomp_events(struct perf_session *session)
1956 {
1957 	s64 skip;
1958 	u64 size;
1959 	struct decomp *decomp = session->active_decomp->decomp_last;
1960 
1961 	if (!decomp)
1962 		return 0;
1963 
1964 	while (decomp->head < decomp->size && !session_done()) {
1965 		union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data,
1966 							     session->header.needs_swap);
1967 
1968 		if (!event)
1969 			break;
1970 
1971 		size = event->header.size;
1972 
1973 		if (size < sizeof(struct perf_event_header) ||
1974 		    (skip = perf_session__process_event(session, event, decomp->file_pos,
1975 							decomp->file_path)) < 0) {
1976 			pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1977 				decomp->file_pos + decomp->head, event->header.size, event->header.type);
1978 			return -EINVAL;
1979 		}
1980 
1981 		if (skip)
1982 			size += skip;
1983 
1984 		decomp->head += size;
1985 	}
1986 
1987 	return 0;
1988 }
1989 
1990 /*
1991  * On 64bit we can mmap the data file in one go. No need for tiny mmap
1992  * slices. On 32bit we use 32MB.
1993  */
1994 #if BITS_PER_LONG == 64
1995 #define MMAP_SIZE ULLONG_MAX
1996 #define NUM_MMAPS 1
1997 #else
1998 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1999 #define NUM_MMAPS 128
2000 #endif
2001 
2002 struct reader;
2003 
2004 typedef s64 (*reader_cb_t)(struct perf_session *session,
2005 			   union perf_event *event,
2006 			   u64 file_offset,
2007 			   const char *file_path);
2008 
2009 struct reader {
2010 	int		 fd;
2011 	const char	 *path;
2012 	u64		 data_size;
2013 	u64		 data_offset;
2014 	reader_cb_t	 process;
2015 	bool		 in_place_update;
2016 	char		 *mmaps[NUM_MMAPS];
2017 	size_t		 mmap_size;
2018 	int		 mmap_idx;
2019 	char		 *mmap_cur;
2020 	u64		 file_pos;
2021 	u64		 file_offset;
2022 	u64		 head;
2023 	u64		 size;
2024 	bool		 done;
2025 	struct zstd_data   zstd_data;
2026 	struct decomp_data decomp_data;
2027 };
2028 
2029 static int
2030 reader__init(struct reader *rd, bool *one_mmap)
2031 {
2032 	u64 data_size = rd->data_size;
2033 	char **mmaps = rd->mmaps;
2034 
2035 	rd->head = rd->data_offset;
2036 	data_size += rd->data_offset;
2037 
2038 	rd->mmap_size = MMAP_SIZE;
2039 	if (rd->mmap_size > data_size) {
2040 		rd->mmap_size = data_size;
2041 		if (one_mmap)
2042 			*one_mmap = true;
2043 	}
2044 
2045 	memset(mmaps, 0, sizeof(rd->mmaps));
2046 
2047 	if (zstd_init(&rd->zstd_data, 0))
2048 		return -1;
2049 	rd->decomp_data.zstd_decomp = &rd->zstd_data;
2050 
2051 	return 0;
2052 }
2053 
2054 static void
2055 reader__release_decomp(struct reader *rd)
2056 {
2057 	perf_decomp__release_events(rd->decomp_data.decomp);
2058 	zstd_fini(&rd->zstd_data);
2059 }
2060 
2061 static int
2062 reader__mmap(struct reader *rd, struct perf_session *session)
2063 {
2064 	int mmap_prot, mmap_flags;
2065 	char *buf, **mmaps = rd->mmaps;
2066 	u64 page_offset;
2067 
2068 	mmap_prot  = PROT_READ;
2069 	mmap_flags = MAP_SHARED;
2070 
2071 	if (rd->in_place_update) {
2072 		mmap_prot  |= PROT_WRITE;
2073 	} else if (session->header.needs_swap) {
2074 		mmap_prot  |= PROT_WRITE;
2075 		mmap_flags = MAP_PRIVATE;
2076 	}
2077 
2078 	if (mmaps[rd->mmap_idx]) {
2079 		munmap(mmaps[rd->mmap_idx], rd->mmap_size);
2080 		mmaps[rd->mmap_idx] = NULL;
2081 	}
2082 
2083 	page_offset = page_size * (rd->head / page_size);
2084 	rd->file_offset += page_offset;
2085 	rd->head -= page_offset;
2086 
2087 	buf = mmap(NULL, rd->mmap_size, mmap_prot, mmap_flags, rd->fd,
2088 		   rd->file_offset);
2089 	if (buf == MAP_FAILED) {
2090 		pr_err("failed to mmap file\n");
2091 		return -errno;
2092 	}
2093 	mmaps[rd->mmap_idx] = rd->mmap_cur = buf;
2094 	rd->mmap_idx = (rd->mmap_idx + 1) & (ARRAY_SIZE(rd->mmaps) - 1);
2095 	rd->file_pos = rd->file_offset + rd->head;
2096 	if (session->one_mmap) {
2097 		session->one_mmap_addr = buf;
2098 		session->one_mmap_offset = rd->file_offset;
2099 	}
2100 
2101 	return 0;
2102 }
2103 
2104 enum {
2105 	READER_OK,
2106 	READER_NODATA,
2107 };
2108 
2109 static int
2110 reader__read_event(struct reader *rd, struct perf_session *session,
2111 		   struct ui_progress *prog)
2112 {
2113 	u64 size;
2114 	int err = READER_OK;
2115 	union perf_event *event;
2116 	s64 skip;
2117 
2118 	event = fetch_mmaped_event(rd->head, rd->mmap_size, rd->mmap_cur,
2119 				   session->header.needs_swap);
2120 	if (IS_ERR(event))
2121 		return PTR_ERR(event);
2122 
2123 	if (!event)
2124 		return READER_NODATA;
2125 
2126 	size = event->header.size;
2127 
2128 	skip = -EINVAL;
2129 
2130 	if (size < sizeof(struct perf_event_header) ||
2131 	    (skip = rd->process(session, event, rd->file_pos, rd->path)) < 0) {
2132 		pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n",
2133 		       rd->file_offset + rd->head, event->header.size,
2134 		       event->header.type, strerror(-skip));
2135 		err = skip;
2136 		goto out;
2137 	}
2138 
2139 	if (skip)
2140 		size += skip;
2141 
2142 	rd->size += size;
2143 	rd->head += size;
2144 	rd->file_pos += size;
2145 
2146 	err = __perf_session__process_decomp_events(session);
2147 	if (err)
2148 		goto out;
2149 
2150 	ui_progress__update(prog, size);
2151 
2152 out:
2153 	return err;
2154 }
2155 
2156 static inline bool
2157 reader__eof(struct reader *rd)
2158 {
2159 	return (rd->file_pos >= rd->data_size + rd->data_offset);
2160 }
2161 
2162 static int
2163 reader__process_events(struct reader *rd, struct perf_session *session,
2164 		       struct ui_progress *prog)
2165 {
2166 	int err;
2167 
2168 	err = reader__init(rd, &session->one_mmap);
2169 	if (err)
2170 		goto out;
2171 
2172 	session->active_decomp = &rd->decomp_data;
2173 
2174 remap:
2175 	err = reader__mmap(rd, session);
2176 	if (err)
2177 		goto out;
2178 
2179 more:
2180 	err = reader__read_event(rd, session, prog);
2181 	if (err < 0)
2182 		goto out;
2183 	else if (err == READER_NODATA)
2184 		goto remap;
2185 
2186 	if (session_done())
2187 		goto out;
2188 
2189 	if (!reader__eof(rd))
2190 		goto more;
2191 
2192 out:
2193 	session->active_decomp = &session->decomp_data;
2194 	return err;
2195 }
2196 
2197 static s64 process_simple(struct perf_session *session,
2198 			  union perf_event *event,
2199 			  u64 file_offset,
2200 			  const char *file_path)
2201 {
2202 	return perf_session__process_event(session, event, file_offset, file_path);
2203 }
2204 
2205 static int __perf_session__process_events(struct perf_session *session)
2206 {
2207 	struct reader rd = {
2208 		.fd		= perf_data__fd(session->data),
2209 		.path		= session->data->file.path,
2210 		.data_size	= session->header.data_size,
2211 		.data_offset	= session->header.data_offset,
2212 		.process	= process_simple,
2213 		.in_place_update = session->data->in_place_update,
2214 	};
2215 	struct ordered_events *oe = &session->ordered_events;
2216 	const struct perf_tool *tool = session->tool;
2217 	struct ui_progress prog;
2218 	int err;
2219 
2220 	if (rd.data_size == 0)
2221 		return -1;
2222 
2223 	ui_progress__init_size(&prog, rd.data_size, "Processing events...");
2224 
2225 	err = reader__process_events(&rd, session, &prog);
2226 	if (err)
2227 		goto out_err;
2228 	/* do the final flush for ordered samples */
2229 	err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2230 	if (err)
2231 		goto out_err;
2232 	err = auxtrace__flush_events(session, tool);
2233 	if (err)
2234 		goto out_err;
2235 	err = perf_session__flush_thread_stacks(session);
2236 out_err:
2237 	ui_progress__finish();
2238 	if (!tool->no_warn)
2239 		perf_session__warn_about_errors(session);
2240 	/*
2241 	 * We may switching perf.data output, make ordered_events
2242 	 * reusable.
2243 	 */
2244 	ordered_events__reinit(&session->ordered_events);
2245 	auxtrace__free_events(session);
2246 	reader__release_decomp(&rd);
2247 	session->one_mmap = false;
2248 	return err;
2249 }
2250 
2251 /*
2252  * Processing 2 MB of data from each reader in sequence,
2253  * because that's the way the ordered events sorting works
2254  * most efficiently.
2255  */
2256 #define READER_MAX_SIZE (2 * 1024 * 1024)
2257 
2258 /*
2259  * This function reads, merge and process directory data.
2260  * It assumens the version 1 of directory data, where each
2261  * data file holds per-cpu data, already sorted by kernel.
2262  */
2263 static int __perf_session__process_dir_events(struct perf_session *session)
2264 {
2265 	struct perf_data *data = session->data;
2266 	const struct perf_tool *tool = session->tool;
2267 	int i, ret, readers, nr_readers;
2268 	struct ui_progress prog;
2269 	u64 total_size = perf_data__size(session->data);
2270 	struct reader *rd;
2271 
2272 	ui_progress__init_size(&prog, total_size, "Processing events...");
2273 
2274 	nr_readers = 1;
2275 	for (i = 0; i < data->dir.nr; i++) {
2276 		if (data->dir.files[i].size)
2277 			nr_readers++;
2278 	}
2279 
2280 	rd = zalloc(nr_readers * sizeof(struct reader));
2281 	if (!rd)
2282 		return -ENOMEM;
2283 
2284 	rd[0] = (struct reader) {
2285 		.fd		 = perf_data__fd(session->data),
2286 		.path		 = session->data->file.path,
2287 		.data_size	 = session->header.data_size,
2288 		.data_offset	 = session->header.data_offset,
2289 		.process	 = process_simple,
2290 		.in_place_update = session->data->in_place_update,
2291 	};
2292 	ret = reader__init(&rd[0], NULL);
2293 	if (ret)
2294 		goto out_err;
2295 	ret = reader__mmap(&rd[0], session);
2296 	if (ret)
2297 		goto out_err;
2298 	readers = 1;
2299 
2300 	for (i = 0; i < data->dir.nr; i++) {
2301 		if (!data->dir.files[i].size)
2302 			continue;
2303 		rd[readers] = (struct reader) {
2304 			.fd		 = data->dir.files[i].fd,
2305 			.path		 = data->dir.files[i].path,
2306 			.data_size	 = data->dir.files[i].size,
2307 			.data_offset	 = 0,
2308 			.process	 = process_simple,
2309 			.in_place_update = session->data->in_place_update,
2310 		};
2311 		ret = reader__init(&rd[readers], NULL);
2312 		if (ret)
2313 			goto out_err;
2314 		ret = reader__mmap(&rd[readers], session);
2315 		if (ret)
2316 			goto out_err;
2317 		readers++;
2318 	}
2319 
2320 	i = 0;
2321 	while (readers) {
2322 		if (session_done())
2323 			break;
2324 
2325 		if (rd[i].done) {
2326 			i = (i + 1) % nr_readers;
2327 			continue;
2328 		}
2329 		if (reader__eof(&rd[i])) {
2330 			rd[i].done = true;
2331 			readers--;
2332 			continue;
2333 		}
2334 
2335 		session->active_decomp = &rd[i].decomp_data;
2336 		ret = reader__read_event(&rd[i], session, &prog);
2337 		if (ret < 0) {
2338 			goto out_err;
2339 		} else if (ret == READER_NODATA) {
2340 			ret = reader__mmap(&rd[i], session);
2341 			if (ret)
2342 				goto out_err;
2343 		}
2344 
2345 		if (rd[i].size >= READER_MAX_SIZE) {
2346 			rd[i].size = 0;
2347 			i = (i + 1) % nr_readers;
2348 		}
2349 	}
2350 
2351 	ret = ordered_events__flush(&session->ordered_events, OE_FLUSH__FINAL);
2352 	if (ret)
2353 		goto out_err;
2354 
2355 	ret = perf_session__flush_thread_stacks(session);
2356 out_err:
2357 	ui_progress__finish();
2358 
2359 	if (!tool->no_warn)
2360 		perf_session__warn_about_errors(session);
2361 
2362 	/*
2363 	 * We may switching perf.data output, make ordered_events
2364 	 * reusable.
2365 	 */
2366 	ordered_events__reinit(&session->ordered_events);
2367 
2368 	session->one_mmap = false;
2369 
2370 	session->active_decomp = &session->decomp_data;
2371 	for (i = 0; i < nr_readers; i++)
2372 		reader__release_decomp(&rd[i]);
2373 	zfree(&rd);
2374 
2375 	return ret;
2376 }
2377 
2378 int perf_session__process_events(struct perf_session *session)
2379 {
2380 	if (perf_session__register_idle_thread(session) < 0)
2381 		return -ENOMEM;
2382 
2383 	if (perf_data__is_pipe(session->data))
2384 		return __perf_session__process_pipe_events(session);
2385 
2386 	if (perf_data__is_dir(session->data) && session->data->dir.nr)
2387 		return __perf_session__process_dir_events(session);
2388 
2389 	return __perf_session__process_events(session);
2390 }
2391 
2392 bool perf_session__has_traces(struct perf_session *session, const char *msg)
2393 {
2394 	struct evsel *evsel;
2395 
2396 	evlist__for_each_entry(session->evlist, evsel) {
2397 		if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT)
2398 			return true;
2399 	}
2400 
2401 	pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
2402 	return false;
2403 }
2404 
2405 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr)
2406 {
2407 	char *bracket;
2408 	struct ref_reloc_sym *ref;
2409 	struct kmap *kmap;
2410 
2411 	ref = zalloc(sizeof(struct ref_reloc_sym));
2412 	if (ref == NULL)
2413 		return -ENOMEM;
2414 
2415 	ref->name = strdup(symbol_name);
2416 	if (ref->name == NULL) {
2417 		free(ref);
2418 		return -ENOMEM;
2419 	}
2420 
2421 	bracket = strchr(ref->name, ']');
2422 	if (bracket)
2423 		*bracket = '\0';
2424 
2425 	ref->addr = addr;
2426 
2427 	kmap = map__kmap(map);
2428 	if (kmap)
2429 		kmap->ref_reloc_sym = ref;
2430 
2431 	return 0;
2432 }
2433 
2434 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
2435 {
2436 	return machines__fprintf_dsos(&session->machines, fp);
2437 }
2438 
2439 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
2440 					  bool (skip)(struct dso *dso, int parm), int parm)
2441 {
2442 	return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
2443 }
2444 
2445 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
2446 {
2447 	size_t ret;
2448 	const char *msg = "";
2449 
2450 	if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
2451 		msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
2452 
2453 	ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
2454 
2455 	ret += events_stats__fprintf(&session->evlist->stats, fp);
2456 	return ret;
2457 }
2458 
2459 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2460 {
2461 	/*
2462 	 * FIXME: Here we have to actually print all the machines in this
2463 	 * session, not just the host...
2464 	 */
2465 	return machine__fprintf(&session->machines.host, fp);
2466 }
2467 
2468 void perf_session__dump_kmaps(struct perf_session *session)
2469 {
2470 	int save_verbose = verbose;
2471 
2472 	fflush(stdout);
2473 	fprintf(stderr, "Kernel and module maps:\n");
2474 	verbose = 0; /* Suppress verbose to print a summary only */
2475 	maps__fprintf(machine__kernel_maps(&session->machines.host), stderr);
2476 	verbose = save_verbose;
2477 }
2478 
2479 struct evsel *perf_session__find_first_evtype(struct perf_session *session,
2480 					      unsigned int type)
2481 {
2482 	struct evsel *pos;
2483 
2484 	evlist__for_each_entry(session->evlist, pos) {
2485 		if (pos->core.attr.type == type)
2486 			return pos;
2487 	}
2488 	return NULL;
2489 }
2490 
2491 int perf_session__cpu_bitmap(struct perf_session *session,
2492 			     const char *cpu_list, unsigned long *cpu_bitmap)
2493 {
2494 	int i, err = -1;
2495 	struct perf_cpu_map *map;
2496 	int nr_cpus = min(session->header.env.nr_cpus_avail, MAX_NR_CPUS);
2497 	struct perf_cpu cpu;
2498 
2499 	for (i = 0; i < PERF_TYPE_MAX; ++i) {
2500 		struct evsel *evsel;
2501 
2502 		evsel = perf_session__find_first_evtype(session, i);
2503 		if (!evsel)
2504 			continue;
2505 
2506 		if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) {
2507 			pr_err("File does not contain CPU events. "
2508 			       "Remove -C option to proceed.\n");
2509 			return -1;
2510 		}
2511 	}
2512 
2513 	map = perf_cpu_map__new(cpu_list);
2514 	if (map == NULL) {
2515 		pr_err("Invalid cpu_list\n");
2516 		return -1;
2517 	}
2518 
2519 	perf_cpu_map__for_each_cpu(cpu, i, map) {
2520 		if (cpu.cpu >= nr_cpus) {
2521 			pr_err("Requested CPU %d too large. "
2522 			       "Consider raising MAX_NR_CPUS\n", cpu.cpu);
2523 			goto out_delete_map;
2524 		}
2525 
2526 		__set_bit(cpu.cpu, cpu_bitmap);
2527 	}
2528 
2529 	err = 0;
2530 
2531 out_delete_map:
2532 	perf_cpu_map__put(map);
2533 	return err;
2534 }
2535 
2536 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2537 				bool full)
2538 {
2539 	if (session == NULL || fp == NULL)
2540 		return;
2541 
2542 	fprintf(fp, "# ========\n");
2543 	perf_header__fprintf_info(session, fp, full);
2544 	fprintf(fp, "# ========\n#\n");
2545 }
2546 
2547 static int perf_session__register_guest(struct perf_session *session, pid_t machine_pid)
2548 {
2549 	struct machine *machine = machines__findnew(&session->machines, machine_pid);
2550 	struct thread *thread;
2551 
2552 	if (!machine)
2553 		return -ENOMEM;
2554 
2555 	machine->single_address_space = session->machines.host.single_address_space;
2556 
2557 	thread = machine__idle_thread(machine);
2558 	if (!thread)
2559 		return -ENOMEM;
2560 	thread__put(thread);
2561 
2562 	machine->kallsyms_filename = perf_data__guest_kallsyms_name(session->data, machine_pid);
2563 
2564 	return 0;
2565 }
2566 
2567 static int perf_session__set_guest_cpu(struct perf_session *session, pid_t pid,
2568 				       pid_t tid, int guest_cpu)
2569 {
2570 	struct machine *machine = &session->machines.host;
2571 	struct thread *thread = machine__findnew_thread(machine, pid, tid);
2572 
2573 	if (!thread)
2574 		return -ENOMEM;
2575 	thread__set_guest_cpu(thread, guest_cpu);
2576 	thread__put(thread);
2577 
2578 	return 0;
2579 }
2580 
2581 int perf_event__process_id_index(struct perf_session *session,
2582 				 union perf_event *event)
2583 {
2584 	struct evlist *evlist = session->evlist;
2585 	struct perf_record_id_index *ie = &event->id_index;
2586 	size_t sz = ie->header.size - sizeof(*ie);
2587 	size_t i, nr, max_nr;
2588 	size_t e1_sz = sizeof(struct id_index_entry);
2589 	size_t e2_sz = sizeof(struct id_index_entry_2);
2590 	size_t etot_sz = e1_sz + e2_sz;
2591 	struct id_index_entry_2 *e2;
2592 	pid_t last_pid = 0;
2593 
2594 	max_nr = sz / e1_sz;
2595 	nr = ie->nr;
2596 	if (nr > max_nr) {
2597 		printf("Too big: nr %zu max_nr %zu\n", nr, max_nr);
2598 		return -EINVAL;
2599 	}
2600 
2601 	if (sz >= nr * etot_sz) {
2602 		max_nr = sz / etot_sz;
2603 		if (nr > max_nr) {
2604 			printf("Too big2: nr %zu max_nr %zu\n", nr, max_nr);
2605 			return -EINVAL;
2606 		}
2607 		e2 = (void *)ie + sizeof(*ie) + nr * e1_sz;
2608 	} else {
2609 		e2 = NULL;
2610 	}
2611 
2612 	if (dump_trace)
2613 		fprintf(stdout, " nr: %zu\n", nr);
2614 
2615 	for (i = 0; i < nr; i++, (e2 ? e2++ : 0)) {
2616 		struct id_index_entry *e = &ie->entries[i];
2617 		struct perf_sample_id *sid;
2618 		int ret;
2619 
2620 		if (dump_trace) {
2621 			fprintf(stdout,	" ... id: %"PRI_lu64, e->id);
2622 			fprintf(stdout,	"  idx: %"PRI_lu64, e->idx);
2623 			fprintf(stdout,	"  cpu: %"PRI_ld64, e->cpu);
2624 			fprintf(stdout, "  tid: %"PRI_ld64, e->tid);
2625 			if (e2) {
2626 				fprintf(stdout, "  machine_pid: %"PRI_ld64, e2->machine_pid);
2627 				fprintf(stdout, "  vcpu: %"PRI_lu64"\n", e2->vcpu);
2628 			} else {
2629 				fprintf(stdout, "\n");
2630 			}
2631 		}
2632 
2633 		sid = evlist__id2sid(evlist, e->id);
2634 		if (!sid)
2635 			return -ENOENT;
2636 
2637 		sid->idx = e->idx;
2638 		sid->cpu.cpu = e->cpu;
2639 		sid->tid = e->tid;
2640 
2641 		if (!e2)
2642 			continue;
2643 
2644 		sid->machine_pid = e2->machine_pid;
2645 		sid->vcpu.cpu = e2->vcpu;
2646 
2647 		if (!sid->machine_pid)
2648 			continue;
2649 
2650 		if (sid->machine_pid != last_pid) {
2651 			ret = perf_session__register_guest(session, sid->machine_pid);
2652 			if (ret)
2653 				return ret;
2654 			last_pid = sid->machine_pid;
2655 			perf_guest = true;
2656 		}
2657 
2658 		ret = perf_session__set_guest_cpu(session, sid->machine_pid, e->tid, e2->vcpu);
2659 		if (ret)
2660 			return ret;
2661 	}
2662 	return 0;
2663 }
2664 
2665 int perf_session__dsos_hit_all(struct perf_session *session)
2666 {
2667 	struct rb_node *nd;
2668 	int err;
2669 
2670 	err = machine__hit_all_dsos(&session->machines.host);
2671 	if (err)
2672 		return err;
2673 
2674 	for (nd = rb_first_cached(&session->machines.guests); nd;
2675 	     nd = rb_next(nd)) {
2676 		struct machine *pos = rb_entry(nd, struct machine, rb_node);
2677 
2678 		err = machine__hit_all_dsos(pos);
2679 		if (err)
2680 			return err;
2681 	}
2682 
2683 	return 0;
2684 }
2685