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 "perf.h"
41 #include <internal/lib.h>
42 
43 static int perf_session__deliver_event(struct perf_session *session,
44 				       union perf_event *event,
45 				       const struct perf_tool *tool,
46 				       u64 file_offset,
47 				       const char *file_path);
48 
perf_session__open(struct perf_session * session)49 static int perf_session__open(struct perf_session *session)
50 {
51 	struct perf_data *data = session->data;
52 
53 	if (perf_session__read_header(session) < 0) {
54 		pr_err("incompatible file format (rerun with -v to learn more)\n");
55 		return -1;
56 	}
57 
58 	if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) {
59 		/* Auxiliary events may reference exited threads, hold onto dead ones. */
60 		symbol_conf.keep_exited_threads = true;
61 	}
62 
63 	if (perf_data__is_pipe(data))
64 		return 0;
65 
66 	if (perf_header__has_feat(&session->header, HEADER_STAT))
67 		return 0;
68 
69 	if (!evlist__valid_sample_type(session->evlist)) {
70 		pr_err("non matching sample_type\n");
71 		return -1;
72 	}
73 
74 	if (!evlist__valid_sample_id_all(session->evlist)) {
75 		pr_err("non matching sample_id_all\n");
76 		return -1;
77 	}
78 
79 	if (!evlist__valid_read_format(session->evlist)) {
80 		pr_err("non matching read_format\n");
81 		return -1;
82 	}
83 
84 	return 0;
85 }
86 
perf_session__set_id_hdr_size(struct perf_session * session)87 void perf_session__set_id_hdr_size(struct perf_session *session)
88 {
89 	u16 id_hdr_size = evlist__id_hdr_size(session->evlist);
90 
91 	machines__set_id_hdr_size(&session->machines, id_hdr_size);
92 }
93 
perf_session__create_kernel_maps(struct perf_session * session)94 int perf_session__create_kernel_maps(struct perf_session *session)
95 {
96 	int ret = machine__create_kernel_maps(&session->machines.host);
97 
98 	if (ret >= 0)
99 		ret = machines__create_guest_kernel_maps(&session->machines);
100 	return ret;
101 }
102 
perf_session__destroy_kernel_maps(struct perf_session * session)103 static void perf_session__destroy_kernel_maps(struct perf_session *session)
104 {
105 	machines__destroy_kernel_maps(&session->machines);
106 }
107 
perf_session__has_comm_exec(struct perf_session * session)108 static bool perf_session__has_comm_exec(struct perf_session *session)
109 {
110 	struct evsel *evsel;
111 
112 	evlist__for_each_entry(session->evlist, evsel) {
113 		if (evsel->core.attr.comm_exec)
114 			return true;
115 	}
116 
117 	return false;
118 }
119 
perf_session__set_comm_exec(struct perf_session * session)120 static void perf_session__set_comm_exec(struct perf_session *session)
121 {
122 	bool comm_exec = perf_session__has_comm_exec(session);
123 
124 	machines__set_comm_exec(&session->machines, comm_exec);
125 }
126 
ordered_events__deliver_event(struct ordered_events * oe,struct ordered_event * event)127 static int ordered_events__deliver_event(struct ordered_events *oe,
128 					 struct ordered_event *event)
129 {
130 	struct perf_session *session = container_of(oe, struct perf_session,
131 						    ordered_events);
132 
133 	return perf_session__deliver_event(session, event->event,
134 					   session->tool, event->file_offset,
135 					   event->file_path);
136 }
137 
__perf_session__new(struct perf_data * data,struct perf_tool * tool,bool trace_event_repipe)138 struct perf_session *__perf_session__new(struct perf_data *data,
139 					 struct perf_tool *tool,
140 					 bool trace_event_repipe)
141 {
142 	int ret = -ENOMEM;
143 	struct perf_session *session = zalloc(sizeof(*session));
144 
145 	if (!session)
146 		goto out;
147 
148 	session->trace_event_repipe = trace_event_repipe;
149 	session->tool   = tool;
150 	session->decomp_data.zstd_decomp = &session->zstd_data;
151 	session->active_decomp = &session->decomp_data;
152 	INIT_LIST_HEAD(&session->auxtrace_index);
153 	machines__init(&session->machines);
154 	ordered_events__init(&session->ordered_events,
155 			     ordered_events__deliver_event, NULL);
156 
157 	perf_env__init(&session->header.env);
158 	if (data) {
159 		ret = perf_data__open(data);
160 		if (ret < 0)
161 			goto out_delete;
162 
163 		session->data = data;
164 
165 		if (perf_data__is_read(data)) {
166 			ret = perf_session__open(session);
167 			if (ret < 0)
168 				goto out_delete;
169 
170 			/*
171 			 * set session attributes that are present in perf.data
172 			 * but not in pipe-mode.
173 			 */
174 			if (!data->is_pipe) {
175 				perf_session__set_id_hdr_size(session);
176 				perf_session__set_comm_exec(session);
177 			}
178 
179 			evlist__init_trace_event_sample_raw(session->evlist);
180 
181 			/* Open the directory data. */
182 			if (data->is_dir) {
183 				ret = perf_data__open_dir(data);
184 				if (ret)
185 					goto out_delete;
186 			}
187 
188 			if (!symbol_conf.kallsyms_name &&
189 			    !symbol_conf.vmlinux_name)
190 				symbol_conf.kallsyms_name = perf_data__kallsyms_name(data);
191 		}
192 	} else  {
193 		session->machines.host.env = &perf_env;
194 	}
195 
196 	session->machines.host.single_address_space =
197 		perf_env__single_address_space(session->machines.host.env);
198 
199 	if (!data || perf_data__is_write(data)) {
200 		/*
201 		 * In O_RDONLY mode this will be performed when reading the
202 		 * kernel MMAP event, in perf_event__process_mmap().
203 		 */
204 		if (perf_session__create_kernel_maps(session) < 0)
205 			pr_warning("Cannot read kernel map\n");
206 	}
207 
208 	/*
209 	 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
210 	 * processed, so evlist__sample_id_all is not meaningful here.
211 	 */
212 	if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps &&
213 	    tool->ordered_events && !evlist__sample_id_all(session->evlist)) {
214 		dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
215 		tool->ordered_events = false;
216 	}
217 
218 	return session;
219 
220  out_delete:
221 	perf_session__delete(session);
222  out:
223 	return ERR_PTR(ret);
224 }
225 
perf_decomp__release_events(struct decomp * next)226 static void perf_decomp__release_events(struct decomp *next)
227 {
228 	struct decomp *decomp;
229 	size_t mmap_len;
230 
231 	do {
232 		decomp = next;
233 		if (decomp == NULL)
234 			break;
235 		next = decomp->next;
236 		mmap_len = decomp->mmap_len;
237 		munmap(decomp, mmap_len);
238 	} while (1);
239 }
240 
perf_session__delete(struct perf_session * session)241 void perf_session__delete(struct perf_session *session)
242 {
243 	if (session == NULL)
244 		return;
245 	auxtrace__free(session);
246 	auxtrace_index__free(&session->auxtrace_index);
247 	debuginfo_cache__delete();
248 	perf_session__destroy_kernel_maps(session);
249 	perf_decomp__release_events(session->decomp_data.decomp);
250 	perf_env__exit(&session->header.env);
251 	machines__exit(&session->machines);
252 	if (session->data) {
253 		if (perf_data__is_read(session->data))
254 			evlist__delete(session->evlist);
255 		perf_data__close(session->data);
256 	}
257 #ifdef HAVE_LIBTRACEEVENT
258 	trace_event__cleanup(&session->tevent);
259 #endif
260 	free(session);
261 }
262 
swap_sample_id_all(union perf_event * event,void * data)263 static void swap_sample_id_all(union perf_event *event, void *data)
264 {
265 	void *end = (void *) event + event->header.size;
266 	int size = end - data;
267 
268 	BUG_ON(size % sizeof(u64));
269 	mem_bswap_64(data, size);
270 }
271 
perf_event__all64_swap(union perf_event * event,bool sample_id_all __maybe_unused)272 static void perf_event__all64_swap(union perf_event *event,
273 				   bool sample_id_all __maybe_unused)
274 {
275 	struct perf_event_header *hdr = &event->header;
276 	mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
277 }
278 
perf_event__comm_swap(union perf_event * event,bool sample_id_all)279 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
280 {
281 	event->comm.pid = bswap_32(event->comm.pid);
282 	event->comm.tid = bswap_32(event->comm.tid);
283 
284 	if (sample_id_all) {
285 		void *data = &event->comm.comm;
286 
287 		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
288 		swap_sample_id_all(event, data);
289 	}
290 }
291 
perf_event__mmap_swap(union perf_event * event,bool sample_id_all)292 static void perf_event__mmap_swap(union perf_event *event,
293 				  bool sample_id_all)
294 {
295 	event->mmap.pid	  = bswap_32(event->mmap.pid);
296 	event->mmap.tid	  = bswap_32(event->mmap.tid);
297 	event->mmap.start = bswap_64(event->mmap.start);
298 	event->mmap.len	  = bswap_64(event->mmap.len);
299 	event->mmap.pgoff = bswap_64(event->mmap.pgoff);
300 
301 	if (sample_id_all) {
302 		void *data = &event->mmap.filename;
303 
304 		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
305 		swap_sample_id_all(event, data);
306 	}
307 }
308 
perf_event__mmap2_swap(union perf_event * event,bool sample_id_all)309 static void perf_event__mmap2_swap(union perf_event *event,
310 				  bool sample_id_all)
311 {
312 	event->mmap2.pid   = bswap_32(event->mmap2.pid);
313 	event->mmap2.tid   = bswap_32(event->mmap2.tid);
314 	event->mmap2.start = bswap_64(event->mmap2.start);
315 	event->mmap2.len   = bswap_64(event->mmap2.len);
316 	event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
317 
318 	if (!(event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID)) {
319 		event->mmap2.maj   = bswap_32(event->mmap2.maj);
320 		event->mmap2.min   = bswap_32(event->mmap2.min);
321 		event->mmap2.ino   = bswap_64(event->mmap2.ino);
322 		event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation);
323 	}
324 
325 	if (sample_id_all) {
326 		void *data = &event->mmap2.filename;
327 
328 		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
329 		swap_sample_id_all(event, data);
330 	}
331 }
perf_event__task_swap(union perf_event * event,bool sample_id_all)332 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
333 {
334 	event->fork.pid	 = bswap_32(event->fork.pid);
335 	event->fork.tid	 = bswap_32(event->fork.tid);
336 	event->fork.ppid = bswap_32(event->fork.ppid);
337 	event->fork.ptid = bswap_32(event->fork.ptid);
338 	event->fork.time = bswap_64(event->fork.time);
339 
340 	if (sample_id_all)
341 		swap_sample_id_all(event, &event->fork + 1);
342 }
343 
perf_event__read_swap(union perf_event * event,bool sample_id_all)344 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
345 {
346 	event->read.pid		 = bswap_32(event->read.pid);
347 	event->read.tid		 = bswap_32(event->read.tid);
348 	event->read.value	 = bswap_64(event->read.value);
349 	event->read.time_enabled = bswap_64(event->read.time_enabled);
350 	event->read.time_running = bswap_64(event->read.time_running);
351 	event->read.id		 = bswap_64(event->read.id);
352 
353 	if (sample_id_all)
354 		swap_sample_id_all(event, &event->read + 1);
355 }
356 
perf_event__aux_swap(union perf_event * event,bool sample_id_all)357 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
358 {
359 	event->aux.aux_offset = bswap_64(event->aux.aux_offset);
360 	event->aux.aux_size   = bswap_64(event->aux.aux_size);
361 	event->aux.flags      = bswap_64(event->aux.flags);
362 
363 	if (sample_id_all)
364 		swap_sample_id_all(event, &event->aux + 1);
365 }
366 
perf_event__itrace_start_swap(union perf_event * event,bool sample_id_all)367 static void perf_event__itrace_start_swap(union perf_event *event,
368 					  bool sample_id_all)
369 {
370 	event->itrace_start.pid	 = bswap_32(event->itrace_start.pid);
371 	event->itrace_start.tid	 = bswap_32(event->itrace_start.tid);
372 
373 	if (sample_id_all)
374 		swap_sample_id_all(event, &event->itrace_start + 1);
375 }
376 
perf_event__switch_swap(union perf_event * event,bool sample_id_all)377 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
378 {
379 	if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
380 		event->context_switch.next_prev_pid =
381 				bswap_32(event->context_switch.next_prev_pid);
382 		event->context_switch.next_prev_tid =
383 				bswap_32(event->context_switch.next_prev_tid);
384 	}
385 
386 	if (sample_id_all)
387 		swap_sample_id_all(event, &event->context_switch + 1);
388 }
389 
perf_event__text_poke_swap(union perf_event * event,bool sample_id_all)390 static void perf_event__text_poke_swap(union perf_event *event, bool sample_id_all)
391 {
392 	event->text_poke.addr    = bswap_64(event->text_poke.addr);
393 	event->text_poke.old_len = bswap_16(event->text_poke.old_len);
394 	event->text_poke.new_len = bswap_16(event->text_poke.new_len);
395 
396 	if (sample_id_all) {
397 		size_t len = sizeof(event->text_poke.old_len) +
398 			     sizeof(event->text_poke.new_len) +
399 			     event->text_poke.old_len +
400 			     event->text_poke.new_len;
401 		void *data = &event->text_poke.old_len;
402 
403 		data += PERF_ALIGN(len, sizeof(u64));
404 		swap_sample_id_all(event, data);
405 	}
406 }
407 
perf_event__throttle_swap(union perf_event * event,bool sample_id_all)408 static void perf_event__throttle_swap(union perf_event *event,
409 				      bool sample_id_all)
410 {
411 	event->throttle.time	  = bswap_64(event->throttle.time);
412 	event->throttle.id	  = bswap_64(event->throttle.id);
413 	event->throttle.stream_id = bswap_64(event->throttle.stream_id);
414 
415 	if (sample_id_all)
416 		swap_sample_id_all(event, &event->throttle + 1);
417 }
418 
perf_event__namespaces_swap(union perf_event * event,bool sample_id_all)419 static void perf_event__namespaces_swap(union perf_event *event,
420 					bool sample_id_all)
421 {
422 	u64 i;
423 
424 	event->namespaces.pid		= bswap_32(event->namespaces.pid);
425 	event->namespaces.tid		= bswap_32(event->namespaces.tid);
426 	event->namespaces.nr_namespaces	= bswap_64(event->namespaces.nr_namespaces);
427 
428 	for (i = 0; i < event->namespaces.nr_namespaces; i++) {
429 		struct perf_ns_link_info *ns = &event->namespaces.link_info[i];
430 
431 		ns->dev = bswap_64(ns->dev);
432 		ns->ino = bswap_64(ns->ino);
433 	}
434 
435 	if (sample_id_all)
436 		swap_sample_id_all(event, &event->namespaces.link_info[i]);
437 }
438 
perf_event__cgroup_swap(union perf_event * event,bool sample_id_all)439 static void perf_event__cgroup_swap(union perf_event *event, bool sample_id_all)
440 {
441 	event->cgroup.id = bswap_64(event->cgroup.id);
442 
443 	if (sample_id_all) {
444 		void *data = &event->cgroup.path;
445 
446 		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
447 		swap_sample_id_all(event, data);
448 	}
449 }
450 
revbyte(u8 b)451 static u8 revbyte(u8 b)
452 {
453 	int rev = (b >> 4) | ((b & 0xf) << 4);
454 	rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
455 	rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
456 	return (u8) rev;
457 }
458 
459 /*
460  * XXX this is hack in attempt to carry flags bitfield
461  * through endian village. ABI says:
462  *
463  * Bit-fields are allocated from right to left (least to most significant)
464  * on little-endian implementations and from left to right (most to least
465  * significant) on big-endian implementations.
466  *
467  * The above seems to be byte specific, so we need to reverse each
468  * byte of the bitfield. 'Internet' also says this might be implementation
469  * specific and we probably need proper fix and carry perf_event_attr
470  * bitfield flags in separate data file FEAT_ section. Thought this seems
471  * to work for now.
472  */
swap_bitfield(u8 * p,unsigned len)473 static void swap_bitfield(u8 *p, unsigned len)
474 {
475 	unsigned i;
476 
477 	for (i = 0; i < len; i++) {
478 		*p = revbyte(*p);
479 		p++;
480 	}
481 }
482 
483 /* exported for swapping attributes in file header */
perf_event__attr_swap(struct perf_event_attr * attr)484 void perf_event__attr_swap(struct perf_event_attr *attr)
485 {
486 	attr->type		= bswap_32(attr->type);
487 	attr->size		= bswap_32(attr->size);
488 
489 #define bswap_safe(f, n) 					\
490 	(attr->size > (offsetof(struct perf_event_attr, f) + 	\
491 		       sizeof(attr->f) * (n)))
492 #define bswap_field(f, sz) 			\
493 do { 						\
494 	if (bswap_safe(f, 0))			\
495 		attr->f = bswap_##sz(attr->f);	\
496 } while(0)
497 #define bswap_field_16(f) bswap_field(f, 16)
498 #define bswap_field_32(f) bswap_field(f, 32)
499 #define bswap_field_64(f) bswap_field(f, 64)
500 
501 	bswap_field_64(config);
502 	bswap_field_64(sample_period);
503 	bswap_field_64(sample_type);
504 	bswap_field_64(read_format);
505 	bswap_field_32(wakeup_events);
506 	bswap_field_32(bp_type);
507 	bswap_field_64(bp_addr);
508 	bswap_field_64(bp_len);
509 	bswap_field_64(branch_sample_type);
510 	bswap_field_64(sample_regs_user);
511 	bswap_field_32(sample_stack_user);
512 	bswap_field_32(aux_watermark);
513 	bswap_field_16(sample_max_stack);
514 	bswap_field_32(aux_sample_size);
515 
516 	/*
517 	 * After read_format are bitfields. Check read_format because
518 	 * we are unable to use offsetof on bitfield.
519 	 */
520 	if (bswap_safe(read_format, 1))
521 		swap_bitfield((u8 *) (&attr->read_format + 1),
522 			      sizeof(u64));
523 #undef bswap_field_64
524 #undef bswap_field_32
525 #undef bswap_field
526 #undef bswap_safe
527 }
528 
perf_event__hdr_attr_swap(union perf_event * event,bool sample_id_all __maybe_unused)529 static void perf_event__hdr_attr_swap(union perf_event *event,
530 				      bool sample_id_all __maybe_unused)
531 {
532 	size_t size;
533 
534 	perf_event__attr_swap(&event->attr.attr);
535 
536 	size = event->header.size;
537 	size -= perf_record_header_attr_id(event) - (void *)event;
538 	mem_bswap_64(perf_record_header_attr_id(event), size);
539 }
540 
perf_event__event_update_swap(union perf_event * event,bool sample_id_all __maybe_unused)541 static void perf_event__event_update_swap(union perf_event *event,
542 					  bool sample_id_all __maybe_unused)
543 {
544 	event->event_update.type = bswap_64(event->event_update.type);
545 	event->event_update.id   = bswap_64(event->event_update.id);
546 }
547 
perf_event__event_type_swap(union perf_event * event,bool sample_id_all __maybe_unused)548 static void perf_event__event_type_swap(union perf_event *event,
549 					bool sample_id_all __maybe_unused)
550 {
551 	event->event_type.event_type.event_id =
552 		bswap_64(event->event_type.event_type.event_id);
553 }
554 
perf_event__tracing_data_swap(union perf_event * event,bool sample_id_all __maybe_unused)555 static void perf_event__tracing_data_swap(union perf_event *event,
556 					  bool sample_id_all __maybe_unused)
557 {
558 	event->tracing_data.size = bswap_32(event->tracing_data.size);
559 }
560 
perf_event__auxtrace_info_swap(union perf_event * event,bool sample_id_all __maybe_unused)561 static void perf_event__auxtrace_info_swap(union perf_event *event,
562 					   bool sample_id_all __maybe_unused)
563 {
564 	size_t size;
565 
566 	event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
567 
568 	size = event->header.size;
569 	size -= (void *)&event->auxtrace_info.priv - (void *)event;
570 	mem_bswap_64(event->auxtrace_info.priv, size);
571 }
572 
perf_event__auxtrace_swap(union perf_event * event,bool sample_id_all __maybe_unused)573 static void perf_event__auxtrace_swap(union perf_event *event,
574 				      bool sample_id_all __maybe_unused)
575 {
576 	event->auxtrace.size      = bswap_64(event->auxtrace.size);
577 	event->auxtrace.offset    = bswap_64(event->auxtrace.offset);
578 	event->auxtrace.reference = bswap_64(event->auxtrace.reference);
579 	event->auxtrace.idx       = bswap_32(event->auxtrace.idx);
580 	event->auxtrace.tid       = bswap_32(event->auxtrace.tid);
581 	event->auxtrace.cpu       = bswap_32(event->auxtrace.cpu);
582 }
583 
perf_event__auxtrace_error_swap(union perf_event * event,bool sample_id_all __maybe_unused)584 static void perf_event__auxtrace_error_swap(union perf_event *event,
585 					    bool sample_id_all __maybe_unused)
586 {
587 	event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
588 	event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
589 	event->auxtrace_error.cpu  = bswap_32(event->auxtrace_error.cpu);
590 	event->auxtrace_error.pid  = bswap_32(event->auxtrace_error.pid);
591 	event->auxtrace_error.tid  = bswap_32(event->auxtrace_error.tid);
592 	event->auxtrace_error.fmt  = bswap_32(event->auxtrace_error.fmt);
593 	event->auxtrace_error.ip   = bswap_64(event->auxtrace_error.ip);
594 	if (event->auxtrace_error.fmt)
595 		event->auxtrace_error.time = bswap_64(event->auxtrace_error.time);
596 	if (event->auxtrace_error.fmt >= 2) {
597 		event->auxtrace_error.machine_pid = bswap_32(event->auxtrace_error.machine_pid);
598 		event->auxtrace_error.vcpu = bswap_32(event->auxtrace_error.vcpu);
599 	}
600 }
601 
perf_event__thread_map_swap(union perf_event * event,bool sample_id_all __maybe_unused)602 static void perf_event__thread_map_swap(union perf_event *event,
603 					bool sample_id_all __maybe_unused)
604 {
605 	unsigned i;
606 
607 	event->thread_map.nr = bswap_64(event->thread_map.nr);
608 
609 	for (i = 0; i < event->thread_map.nr; i++)
610 		event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
611 }
612 
perf_event__cpu_map_swap(union perf_event * event,bool sample_id_all __maybe_unused)613 static void perf_event__cpu_map_swap(union perf_event *event,
614 				     bool sample_id_all __maybe_unused)
615 {
616 	struct perf_record_cpu_map_data *data = &event->cpu_map.data;
617 
618 	data->type = bswap_16(data->type);
619 
620 	switch (data->type) {
621 	case PERF_CPU_MAP__CPUS:
622 		data->cpus_data.nr = bswap_16(data->cpus_data.nr);
623 
624 		for (unsigned i = 0; i < data->cpus_data.nr; i++)
625 			data->cpus_data.cpu[i] = bswap_16(data->cpus_data.cpu[i]);
626 		break;
627 	case PERF_CPU_MAP__MASK:
628 		data->mask32_data.long_size = bswap_16(data->mask32_data.long_size);
629 
630 		switch (data->mask32_data.long_size) {
631 		case 4:
632 			data->mask32_data.nr = bswap_16(data->mask32_data.nr);
633 			for (unsigned i = 0; i < data->mask32_data.nr; i++)
634 				data->mask32_data.mask[i] = bswap_32(data->mask32_data.mask[i]);
635 			break;
636 		case 8:
637 			data->mask64_data.nr = bswap_16(data->mask64_data.nr);
638 			for (unsigned i = 0; i < data->mask64_data.nr; i++)
639 				data->mask64_data.mask[i] = bswap_64(data->mask64_data.mask[i]);
640 			break;
641 		default:
642 			pr_err("cpu_map swap: unsupported long size\n");
643 		}
644 		break;
645 	case PERF_CPU_MAP__RANGE_CPUS:
646 		data->range_cpu_data.start_cpu = bswap_16(data->range_cpu_data.start_cpu);
647 		data->range_cpu_data.end_cpu = bswap_16(data->range_cpu_data.end_cpu);
648 		break;
649 	default:
650 		break;
651 	}
652 }
653 
perf_event__stat_config_swap(union perf_event * event,bool sample_id_all __maybe_unused)654 static void perf_event__stat_config_swap(union perf_event *event,
655 					 bool sample_id_all __maybe_unused)
656 {
657 	u64 size;
658 
659 	size  = bswap_64(event->stat_config.nr) * sizeof(event->stat_config.data[0]);
660 	size += 1; /* nr item itself */
661 	mem_bswap_64(&event->stat_config.nr, size);
662 }
663 
perf_event__stat_swap(union perf_event * event,bool sample_id_all __maybe_unused)664 static void perf_event__stat_swap(union perf_event *event,
665 				  bool sample_id_all __maybe_unused)
666 {
667 	event->stat.id     = bswap_64(event->stat.id);
668 	event->stat.thread = bswap_32(event->stat.thread);
669 	event->stat.cpu    = bswap_32(event->stat.cpu);
670 	event->stat.val    = bswap_64(event->stat.val);
671 	event->stat.ena    = bswap_64(event->stat.ena);
672 	event->stat.run    = bswap_64(event->stat.run);
673 }
674 
perf_event__stat_round_swap(union perf_event * event,bool sample_id_all __maybe_unused)675 static void perf_event__stat_round_swap(union perf_event *event,
676 					bool sample_id_all __maybe_unused)
677 {
678 	event->stat_round.type = bswap_64(event->stat_round.type);
679 	event->stat_round.time = bswap_64(event->stat_round.time);
680 }
681 
perf_event__time_conv_swap(union perf_event * event,bool sample_id_all __maybe_unused)682 static void perf_event__time_conv_swap(union perf_event *event,
683 				       bool sample_id_all __maybe_unused)
684 {
685 	event->time_conv.time_shift = bswap_64(event->time_conv.time_shift);
686 	event->time_conv.time_mult  = bswap_64(event->time_conv.time_mult);
687 	event->time_conv.time_zero  = bswap_64(event->time_conv.time_zero);
688 
689 	if (event_contains(event->time_conv, time_cycles)) {
690 		event->time_conv.time_cycles = bswap_64(event->time_conv.time_cycles);
691 		event->time_conv.time_mask = bswap_64(event->time_conv.time_mask);
692 	}
693 }
694 
695 typedef void (*perf_event__swap_op)(union perf_event *event,
696 				    bool sample_id_all);
697 
698 static perf_event__swap_op perf_event__swap_ops[] = {
699 	[PERF_RECORD_MMAP]		  = perf_event__mmap_swap,
700 	[PERF_RECORD_MMAP2]		  = perf_event__mmap2_swap,
701 	[PERF_RECORD_COMM]		  = perf_event__comm_swap,
702 	[PERF_RECORD_FORK]		  = perf_event__task_swap,
703 	[PERF_RECORD_EXIT]		  = perf_event__task_swap,
704 	[PERF_RECORD_LOST]		  = perf_event__all64_swap,
705 	[PERF_RECORD_READ]		  = perf_event__read_swap,
706 	[PERF_RECORD_THROTTLE]		  = perf_event__throttle_swap,
707 	[PERF_RECORD_UNTHROTTLE]	  = perf_event__throttle_swap,
708 	[PERF_RECORD_SAMPLE]		  = perf_event__all64_swap,
709 	[PERF_RECORD_AUX]		  = perf_event__aux_swap,
710 	[PERF_RECORD_ITRACE_START]	  = perf_event__itrace_start_swap,
711 	[PERF_RECORD_LOST_SAMPLES]	  = perf_event__all64_swap,
712 	[PERF_RECORD_SWITCH]		  = perf_event__switch_swap,
713 	[PERF_RECORD_SWITCH_CPU_WIDE]	  = perf_event__switch_swap,
714 	[PERF_RECORD_NAMESPACES]	  = perf_event__namespaces_swap,
715 	[PERF_RECORD_CGROUP]		  = perf_event__cgroup_swap,
716 	[PERF_RECORD_TEXT_POKE]		  = perf_event__text_poke_swap,
717 	[PERF_RECORD_AUX_OUTPUT_HW_ID]	  = perf_event__all64_swap,
718 	[PERF_RECORD_HEADER_ATTR]	  = perf_event__hdr_attr_swap,
719 	[PERF_RECORD_HEADER_EVENT_TYPE]	  = perf_event__event_type_swap,
720 	[PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
721 	[PERF_RECORD_HEADER_BUILD_ID]	  = NULL,
722 	[PERF_RECORD_ID_INDEX]		  = perf_event__all64_swap,
723 	[PERF_RECORD_AUXTRACE_INFO]	  = perf_event__auxtrace_info_swap,
724 	[PERF_RECORD_AUXTRACE]		  = perf_event__auxtrace_swap,
725 	[PERF_RECORD_AUXTRACE_ERROR]	  = perf_event__auxtrace_error_swap,
726 	[PERF_RECORD_THREAD_MAP]	  = perf_event__thread_map_swap,
727 	[PERF_RECORD_CPU_MAP]		  = perf_event__cpu_map_swap,
728 	[PERF_RECORD_STAT_CONFIG]	  = perf_event__stat_config_swap,
729 	[PERF_RECORD_STAT]		  = perf_event__stat_swap,
730 	[PERF_RECORD_STAT_ROUND]	  = perf_event__stat_round_swap,
731 	[PERF_RECORD_EVENT_UPDATE]	  = perf_event__event_update_swap,
732 	[PERF_RECORD_TIME_CONV]		  = perf_event__time_conv_swap,
733 	[PERF_RECORD_HEADER_MAX]	  = NULL,
734 };
735 
736 /*
737  * When perf record finishes a pass on every buffers, it records this pseudo
738  * event.
739  * We record the max timestamp t found in the pass n.
740  * Assuming these timestamps are monotonic across cpus, we know that if
741  * a buffer still has events with timestamps below t, they will be all
742  * available and then read in the pass n + 1.
743  * Hence when we start to read the pass n + 2, we can safely flush every
744  * events with timestamps below t.
745  *
746  *    ============ PASS n =================
747  *       CPU 0         |   CPU 1
748  *                     |
749  *    cnt1 timestamps  |   cnt2 timestamps
750  *          1          |         2
751  *          2          |         3
752  *          -          |         4  <--- max recorded
753  *
754  *    ============ PASS n + 1 ==============
755  *       CPU 0         |   CPU 1
756  *                     |
757  *    cnt1 timestamps  |   cnt2 timestamps
758  *          3          |         5
759  *          4          |         6
760  *          5          |         7 <---- max recorded
761  *
762  *      Flush every events below timestamp 4
763  *
764  *    ============ PASS n + 2 ==============
765  *       CPU 0         |   CPU 1
766  *                     |
767  *    cnt1 timestamps  |   cnt2 timestamps
768  *          6          |         8
769  *          7          |         9
770  *          -          |         10
771  *
772  *      Flush every events below timestamp 7
773  *      etc...
774  */
perf_event__process_finished_round(const struct perf_tool * tool __maybe_unused,union perf_event * event __maybe_unused,struct ordered_events * oe)775 int perf_event__process_finished_round(const struct perf_tool *tool __maybe_unused,
776 				       union perf_event *event __maybe_unused,
777 				       struct ordered_events *oe)
778 {
779 	if (dump_trace)
780 		fprintf(stdout, "\n");
781 	return ordered_events__flush(oe, OE_FLUSH__ROUND);
782 }
783 
perf_session__queue_event(struct perf_session * s,union perf_event * event,u64 timestamp,u64 file_offset,const char * file_path)784 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
785 			      u64 timestamp, u64 file_offset, const char *file_path)
786 {
787 	return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset, file_path);
788 }
789 
callchain__lbr_callstack_printf(struct perf_sample * sample)790 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
791 {
792 	struct ip_callchain *callchain = sample->callchain;
793 	struct branch_stack *lbr_stack = sample->branch_stack;
794 	struct branch_entry *entries = perf_sample__branch_entries(sample);
795 	u64 kernel_callchain_nr = callchain->nr;
796 	unsigned int i;
797 
798 	for (i = 0; i < kernel_callchain_nr; i++) {
799 		if (callchain->ips[i] == PERF_CONTEXT_USER)
800 			break;
801 	}
802 
803 	if ((i != kernel_callchain_nr) && lbr_stack->nr) {
804 		u64 total_nr;
805 		/*
806 		 * LBR callstack can only get user call chain,
807 		 * i is kernel call chain number,
808 		 * 1 is PERF_CONTEXT_USER.
809 		 *
810 		 * The user call chain is stored in LBR registers.
811 		 * LBR are pair registers. The caller is stored
812 		 * in "from" register, while the callee is stored
813 		 * in "to" register.
814 		 * For example, there is a call stack
815 		 * "A"->"B"->"C"->"D".
816 		 * The LBR registers will be recorded like
817 		 * "C"->"D", "B"->"C", "A"->"B".
818 		 * So only the first "to" register and all "from"
819 		 * registers are needed to construct the whole stack.
820 		 */
821 		total_nr = i + 1 + lbr_stack->nr + 1;
822 		kernel_callchain_nr = i + 1;
823 
824 		printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
825 
826 		for (i = 0; i < kernel_callchain_nr; i++)
827 			printf("..... %2d: %016" PRIx64 "\n",
828 			       i, callchain->ips[i]);
829 
830 		printf("..... %2d: %016" PRIx64 "\n",
831 		       (int)(kernel_callchain_nr), entries[0].to);
832 		for (i = 0; i < lbr_stack->nr; i++)
833 			printf("..... %2d: %016" PRIx64 "\n",
834 			       (int)(i + kernel_callchain_nr + 1), entries[i].from);
835 	}
836 }
837 
callchain__printf(struct evsel * evsel,struct perf_sample * sample)838 static void callchain__printf(struct evsel *evsel,
839 			      struct perf_sample *sample)
840 {
841 	unsigned int i;
842 	struct ip_callchain *callchain = sample->callchain;
843 
844 	if (evsel__has_branch_callstack(evsel))
845 		callchain__lbr_callstack_printf(sample);
846 
847 	printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
848 
849 	for (i = 0; i < callchain->nr; i++)
850 		printf("..... %2d: %016" PRIx64 "\n",
851 		       i, callchain->ips[i]);
852 }
853 
branch_stack__printf(struct perf_sample * sample,struct evsel * evsel)854 static void branch_stack__printf(struct perf_sample *sample,
855 				 struct evsel *evsel)
856 {
857 	struct branch_entry *entries = perf_sample__branch_entries(sample);
858 	bool callstack = evsel__has_branch_callstack(evsel);
859 	u64 *branch_stack_cntr = sample->branch_stack_cntr;
860 	uint64_t i;
861 
862 	if (!callstack) {
863 		printf("%s: nr:%" PRIu64 "\n", "... branch stack", sample->branch_stack->nr);
864 	} else {
865 		/* the reason of adding 1 to nr is because after expanding
866 		 * branch stack it generates nr + 1 callstack records. e.g.,
867 		 *         B()->C()
868 		 *         A()->B()
869 		 * the final callstack should be:
870 		 *         C()
871 		 *         B()
872 		 *         A()
873 		 */
874 		printf("%s: nr:%" PRIu64 "\n", "... branch callstack", sample->branch_stack->nr+1);
875 	}
876 
877 	for (i = 0; i < sample->branch_stack->nr; i++) {
878 		struct branch_entry *e = &entries[i];
879 
880 		if (!callstack) {
881 			printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x %s %s\n",
882 				i, e->from, e->to,
883 				(unsigned short)e->flags.cycles,
884 				e->flags.mispred ? "M" : " ",
885 				e->flags.predicted ? "P" : " ",
886 				e->flags.abort ? "A" : " ",
887 				e->flags.in_tx ? "T" : " ",
888 				(unsigned)e->flags.reserved,
889 				get_branch_type(e),
890 				e->flags.spec ? branch_spec_desc(e->flags.spec) : "");
891 		} else {
892 			if (i == 0) {
893 				printf("..... %2"PRIu64": %016" PRIx64 "\n"
894 				       "..... %2"PRIu64": %016" PRIx64 "\n",
895 						i, e->to, i+1, e->from);
896 			} else {
897 				printf("..... %2"PRIu64": %016" PRIx64 "\n", i+1, e->from);
898 			}
899 		}
900 	}
901 
902 	if (branch_stack_cntr) {
903 		unsigned int br_cntr_width, br_cntr_nr;
904 
905 		perf_env__find_br_cntr_info(evsel__env(evsel), &br_cntr_nr, &br_cntr_width);
906 		printf("... branch stack counters: nr:%" PRIu64 " (counter width: %u max counter nr:%u)\n",
907 			sample->branch_stack->nr, br_cntr_width, br_cntr_nr);
908 		for (i = 0; i < sample->branch_stack->nr; i++)
909 			printf("..... %2"PRIu64": %016" PRIx64 "\n", i, branch_stack_cntr[i]);
910 	}
911 }
912 
regs_dump__printf(u64 mask,u64 * regs,const char * arch)913 static void regs_dump__printf(u64 mask, u64 *regs, const char *arch)
914 {
915 	unsigned rid, i = 0;
916 
917 	for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
918 		u64 val = regs[i++];
919 
920 		printf(".... %-5s 0x%016" PRIx64 "\n",
921 		       perf_reg_name(rid, arch), val);
922 	}
923 }
924 
925 static const char *regs_abi[] = {
926 	[PERF_SAMPLE_REGS_ABI_NONE] = "none",
927 	[PERF_SAMPLE_REGS_ABI_32] = "32-bit",
928 	[PERF_SAMPLE_REGS_ABI_64] = "64-bit",
929 };
930 
regs_dump_abi(struct regs_dump * d)931 static inline const char *regs_dump_abi(struct regs_dump *d)
932 {
933 	if (d->abi > PERF_SAMPLE_REGS_ABI_64)
934 		return "unknown";
935 
936 	return regs_abi[d->abi];
937 }
938 
regs__printf(const char * type,struct regs_dump * regs,const char * arch)939 static void regs__printf(const char *type, struct regs_dump *regs, const char *arch)
940 {
941 	u64 mask = regs->mask;
942 
943 	printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
944 	       type,
945 	       mask,
946 	       regs_dump_abi(regs));
947 
948 	regs_dump__printf(mask, regs->regs, arch);
949 }
950 
regs_user__printf(struct perf_sample * sample,const char * arch)951 static void regs_user__printf(struct perf_sample *sample, const char *arch)
952 {
953 	struct regs_dump *user_regs;
954 
955 	if (!sample->user_regs)
956 		return;
957 
958 	user_regs = perf_sample__user_regs(sample);
959 
960 	if (user_regs->regs)
961 		regs__printf("user", user_regs, arch);
962 }
963 
regs_intr__printf(struct perf_sample * sample,const char * arch)964 static void regs_intr__printf(struct perf_sample *sample, const char *arch)
965 {
966 	struct regs_dump *intr_regs;
967 
968 	if (!sample->intr_regs)
969 		return;
970 
971 	intr_regs = perf_sample__intr_regs(sample);
972 
973 	if (intr_regs->regs)
974 		regs__printf("intr", intr_regs, arch);
975 }
976 
stack_user__printf(struct stack_dump * dump)977 static void stack_user__printf(struct stack_dump *dump)
978 {
979 	printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
980 	       dump->size, dump->offset);
981 }
982 
evlist__print_tstamp(struct evlist * evlist,union perf_event * event,struct perf_sample * sample)983 static void evlist__print_tstamp(struct evlist *evlist, union perf_event *event, struct perf_sample *sample)
984 {
985 	u64 sample_type = __evlist__combined_sample_type(evlist);
986 
987 	if (event->header.type != PERF_RECORD_SAMPLE &&
988 	    !evlist__sample_id_all(evlist)) {
989 		fputs("-1 -1 ", stdout);
990 		return;
991 	}
992 
993 	if ((sample_type & PERF_SAMPLE_CPU))
994 		printf("%u ", sample->cpu);
995 
996 	if (sample_type & PERF_SAMPLE_TIME)
997 		printf("%" PRIu64 " ", sample->time);
998 }
999 
sample_read__printf(struct perf_sample * sample,u64 read_format)1000 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1001 {
1002 	printf("... sample_read:\n");
1003 
1004 	if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1005 		printf("...... time enabled %016" PRIx64 "\n",
1006 		       sample->read.time_enabled);
1007 
1008 	if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1009 		printf("...... time running %016" PRIx64 "\n",
1010 		       sample->read.time_running);
1011 
1012 	if (read_format & PERF_FORMAT_GROUP) {
1013 		struct sample_read_value *value = sample->read.group.values;
1014 
1015 		printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1016 
1017 		sample_read_group__for_each(value, sample->read.group.nr, read_format) {
1018 			printf("..... id %016" PRIx64
1019 			       ", value %016" PRIx64,
1020 			       value->id, value->value);
1021 			if (read_format & PERF_FORMAT_LOST)
1022 				printf(", lost %" PRIu64, value->lost);
1023 			printf("\n");
1024 		}
1025 	} else {
1026 		printf("..... id %016" PRIx64 ", value %016" PRIx64,
1027 			sample->read.one.id, sample->read.one.value);
1028 		if (read_format & PERF_FORMAT_LOST)
1029 			printf(", lost %" PRIu64, sample->read.one.lost);
1030 		printf("\n");
1031 	}
1032 }
1033 
dump_event(struct evlist * evlist,union perf_event * event,u64 file_offset,struct perf_sample * sample,const char * file_path)1034 static void dump_event(struct evlist *evlist, union perf_event *event,
1035 		       u64 file_offset, struct perf_sample *sample,
1036 		       const char *file_path)
1037 {
1038 	if (!dump_trace)
1039 		return;
1040 
1041 	printf("\n%#" PRIx64 "@%s [%#x]: event: %d\n",
1042 	       file_offset, file_path, event->header.size, event->header.type);
1043 
1044 	trace_event(event);
1045 	if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw)
1046 		evlist->trace_event_sample_raw(evlist, event, sample);
1047 
1048 	if (sample)
1049 		evlist__print_tstamp(evlist, event, sample);
1050 
1051 	printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1052 	       event->header.size, perf_event__name(event->header.type));
1053 }
1054 
get_page_size_name(u64 size,char * str)1055 char *get_page_size_name(u64 size, char *str)
1056 {
1057 	if (!size || !unit_number__scnprintf(str, PAGE_SIZE_NAME_LEN, size))
1058 		snprintf(str, PAGE_SIZE_NAME_LEN, "%s", "N/A");
1059 
1060 	return str;
1061 }
1062 
dump_sample(struct evsel * evsel,union perf_event * event,struct perf_sample * sample,const char * arch)1063 static void dump_sample(struct evsel *evsel, union perf_event *event,
1064 			struct perf_sample *sample, const char *arch)
1065 {
1066 	u64 sample_type;
1067 	char str[PAGE_SIZE_NAME_LEN];
1068 
1069 	if (!dump_trace)
1070 		return;
1071 
1072 	printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1073 	       event->header.misc, sample->pid, sample->tid, sample->ip,
1074 	       sample->period, sample->addr);
1075 
1076 	sample_type = evsel->core.attr.sample_type;
1077 
1078 	if (evsel__has_callchain(evsel))
1079 		callchain__printf(evsel, sample);
1080 
1081 	if (evsel__has_br_stack(evsel))
1082 		branch_stack__printf(sample, evsel);
1083 
1084 	if (sample_type & PERF_SAMPLE_REGS_USER)
1085 		regs_user__printf(sample, arch);
1086 
1087 	if (sample_type & PERF_SAMPLE_REGS_INTR)
1088 		regs_intr__printf(sample, arch);
1089 
1090 	if (sample_type & PERF_SAMPLE_STACK_USER)
1091 		stack_user__printf(&sample->user_stack);
1092 
1093 	if (sample_type & PERF_SAMPLE_WEIGHT_TYPE) {
1094 		printf("... weight: %" PRIu64 "", sample->weight);
1095 			if (sample_type & PERF_SAMPLE_WEIGHT_STRUCT) {
1096 				printf(",0x%"PRIx16"", sample->ins_lat);
1097 				printf(",0x%"PRIx16"", sample->p_stage_cyc);
1098 			}
1099 		printf("\n");
1100 	}
1101 
1102 	if (sample_type & PERF_SAMPLE_DATA_SRC)
1103 		printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1104 
1105 	if (sample_type & PERF_SAMPLE_PHYS_ADDR)
1106 		printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
1107 
1108 	if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)
1109 		printf(" .. data page size: %s\n", get_page_size_name(sample->data_page_size, str));
1110 
1111 	if (sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)
1112 		printf(" .. code page size: %s\n", get_page_size_name(sample->code_page_size, str));
1113 
1114 	if (sample_type & PERF_SAMPLE_TRANSACTION)
1115 		printf("... transaction: %" PRIx64 "\n", sample->transaction);
1116 
1117 	if (sample_type & PERF_SAMPLE_READ)
1118 		sample_read__printf(sample, evsel->core.attr.read_format);
1119 }
1120 
dump_read(struct evsel * evsel,union perf_event * event)1121 static void dump_read(struct evsel *evsel, union perf_event *event)
1122 {
1123 	struct perf_record_read *read_event = &event->read;
1124 	u64 read_format;
1125 
1126 	if (!dump_trace)
1127 		return;
1128 
1129 	printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid,
1130 	       evsel__name(evsel), event->read.value);
1131 
1132 	if (!evsel)
1133 		return;
1134 
1135 	read_format = evsel->core.attr.read_format;
1136 
1137 	if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1138 		printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled);
1139 
1140 	if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1141 		printf("... time running : %" PRI_lu64 "\n", read_event->time_running);
1142 
1143 	if (read_format & PERF_FORMAT_ID)
1144 		printf("... id           : %" PRI_lu64 "\n", read_event->id);
1145 
1146 	if (read_format & PERF_FORMAT_LOST)
1147 		printf("... lost         : %" PRI_lu64 "\n", read_event->lost);
1148 }
1149 
machines__find_for_cpumode(struct machines * machines,union perf_event * event,struct perf_sample * sample)1150 static struct machine *machines__find_for_cpumode(struct machines *machines,
1151 					       union perf_event *event,
1152 					       struct perf_sample *sample)
1153 {
1154 	if (perf_guest &&
1155 	    ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1156 	     (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1157 		u32 pid;
1158 
1159 		if (sample->machine_pid)
1160 			pid = sample->machine_pid;
1161 		else if (event->header.type == PERF_RECORD_MMAP
1162 		    || event->header.type == PERF_RECORD_MMAP2)
1163 			pid = event->mmap.pid;
1164 		else
1165 			pid = sample->pid;
1166 
1167 		/*
1168 		 * Guest code machine is created as needed and does not use
1169 		 * DEFAULT_GUEST_KERNEL_ID.
1170 		 */
1171 		if (symbol_conf.guest_code)
1172 			return machines__findnew(machines, pid);
1173 
1174 		return machines__find_guest(machines, pid);
1175 	}
1176 
1177 	return &machines->host;
1178 }
1179 
deliver_sample_value(struct evlist * evlist,const struct perf_tool * tool,union perf_event * event,struct perf_sample * sample,struct sample_read_value * v,struct machine * machine,bool per_thread)1180 static int deliver_sample_value(struct evlist *evlist,
1181 				const struct perf_tool *tool,
1182 				union perf_event *event,
1183 				struct perf_sample *sample,
1184 				struct sample_read_value *v,
1185 				struct machine *machine,
1186 				bool per_thread)
1187 {
1188 	struct perf_sample_id *sid = evlist__id2sid(evlist, v->id);
1189 	struct evsel *evsel;
1190 	u64 *storage = NULL;
1191 
1192 	if (sid) {
1193 		storage = perf_sample_id__get_period_storage(sid, sample->tid, per_thread);
1194 	}
1195 
1196 	if (storage) {
1197 		sample->id     = v->id;
1198 		sample->period = v->value - *storage;
1199 		*storage       = v->value;
1200 	}
1201 
1202 	if (!storage || sid->evsel == NULL) {
1203 		++evlist->stats.nr_unknown_id;
1204 		return 0;
1205 	}
1206 
1207 	/*
1208 	 * There's no reason to deliver sample
1209 	 * for zero period, bail out.
1210 	 */
1211 	if (!sample->period)
1212 		return 0;
1213 
1214 	evsel = container_of(sid->evsel, struct evsel, core);
1215 	return tool->sample(tool, event, sample, evsel, machine);
1216 }
1217 
deliver_sample_group(struct evlist * evlist,const struct perf_tool * tool,union perf_event * event,struct perf_sample * sample,struct machine * machine,u64 read_format,bool per_thread)1218 static int deliver_sample_group(struct evlist *evlist,
1219 				const struct perf_tool *tool,
1220 				union  perf_event *event,
1221 				struct perf_sample *sample,
1222 				struct machine *machine,
1223 				u64 read_format,
1224 				bool per_thread)
1225 {
1226 	int ret = -EINVAL;
1227 	struct sample_read_value *v = sample->read.group.values;
1228 
1229 	if (tool->dont_split_sample_group)
1230 		return deliver_sample_value(evlist, tool, event, sample, v, machine,
1231 					    per_thread);
1232 
1233 	sample_read_group__for_each(v, sample->read.group.nr, read_format) {
1234 		ret = deliver_sample_value(evlist, tool, event, sample, v,
1235 					   machine, per_thread);
1236 		if (ret)
1237 			break;
1238 	}
1239 
1240 	return ret;
1241 }
1242 
evlist__deliver_sample(struct evlist * evlist,const struct perf_tool * tool,union perf_event * event,struct perf_sample * sample,struct evsel * evsel,struct machine * machine)1243 static int evlist__deliver_sample(struct evlist *evlist, const struct perf_tool *tool,
1244 				  union  perf_event *event, struct perf_sample *sample,
1245 				  struct evsel *evsel, struct machine *machine)
1246 {
1247 	/* We know evsel != NULL. */
1248 	u64 sample_type = evsel->core.attr.sample_type;
1249 	u64 read_format = evsel->core.attr.read_format;
1250 	bool per_thread = perf_evsel__attr_has_per_thread_sample_period(&evsel->core);
1251 
1252 	/* Standard sample delivery. */
1253 	if (!(sample_type & PERF_SAMPLE_READ))
1254 		return tool->sample(tool, event, sample, evsel, machine);
1255 
1256 	/* For PERF_SAMPLE_READ we have either single or group mode. */
1257 	if (read_format & PERF_FORMAT_GROUP)
1258 		return deliver_sample_group(evlist, tool, event, sample,
1259 					    machine, read_format, per_thread);
1260 	else
1261 		return deliver_sample_value(evlist, tool, event, sample,
1262 					    &sample->read.one, machine,
1263 					    per_thread);
1264 }
1265 
machines__deliver_event(struct machines * machines,struct evlist * evlist,union perf_event * event,struct perf_sample * sample,const struct perf_tool * tool,u64 file_offset,const char * file_path)1266 static int machines__deliver_event(struct machines *machines,
1267 				   struct evlist *evlist,
1268 				   union perf_event *event,
1269 				   struct perf_sample *sample,
1270 				   const struct perf_tool *tool, u64 file_offset,
1271 				   const char *file_path)
1272 {
1273 	struct evsel *evsel;
1274 	struct machine *machine;
1275 
1276 	dump_event(evlist, event, file_offset, sample, file_path);
1277 
1278 	evsel = evlist__id2evsel(evlist, sample->id);
1279 
1280 	machine = machines__find_for_cpumode(machines, event, sample);
1281 
1282 	switch (event->header.type) {
1283 	case PERF_RECORD_SAMPLE:
1284 		if (evsel == NULL) {
1285 			++evlist->stats.nr_unknown_id;
1286 			return 0;
1287 		}
1288 		if (machine == NULL) {
1289 			++evlist->stats.nr_unprocessable_samples;
1290 			dump_sample(evsel, event, sample, perf_env__arch(NULL));
1291 			return 0;
1292 		}
1293 		dump_sample(evsel, event, sample, perf_env__arch(machine->env));
1294 		return evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1295 	case PERF_RECORD_MMAP:
1296 		return tool->mmap(tool, event, sample, machine);
1297 	case PERF_RECORD_MMAP2:
1298 		if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1299 			++evlist->stats.nr_proc_map_timeout;
1300 		return tool->mmap2(tool, event, sample, machine);
1301 	case PERF_RECORD_COMM:
1302 		return tool->comm(tool, event, sample, machine);
1303 	case PERF_RECORD_NAMESPACES:
1304 		return tool->namespaces(tool, event, sample, machine);
1305 	case PERF_RECORD_CGROUP:
1306 		return tool->cgroup(tool, event, sample, machine);
1307 	case PERF_RECORD_FORK:
1308 		return tool->fork(tool, event, sample, machine);
1309 	case PERF_RECORD_EXIT:
1310 		return tool->exit(tool, event, sample, machine);
1311 	case PERF_RECORD_LOST:
1312 		if (tool->lost == perf_event__process_lost)
1313 			evlist->stats.total_lost += event->lost.lost;
1314 		return tool->lost(tool, event, sample, machine);
1315 	case PERF_RECORD_LOST_SAMPLES:
1316 		if (event->header.misc & PERF_RECORD_MISC_LOST_SAMPLES_BPF)
1317 			evlist->stats.total_dropped_samples += event->lost_samples.lost;
1318 		else if (tool->lost_samples == perf_event__process_lost_samples)
1319 			evlist->stats.total_lost_samples += event->lost_samples.lost;
1320 		return tool->lost_samples(tool, event, sample, machine);
1321 	case PERF_RECORD_READ:
1322 		dump_read(evsel, event);
1323 		return tool->read(tool, event, sample, evsel, machine);
1324 	case PERF_RECORD_THROTTLE:
1325 		return tool->throttle(tool, event, sample, machine);
1326 	case PERF_RECORD_UNTHROTTLE:
1327 		return tool->unthrottle(tool, event, sample, machine);
1328 	case PERF_RECORD_AUX:
1329 		if (tool->aux == perf_event__process_aux) {
1330 			if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1331 				evlist->stats.total_aux_lost += 1;
1332 			if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1333 				evlist->stats.total_aux_partial += 1;
1334 			if (event->aux.flags & PERF_AUX_FLAG_COLLISION)
1335 				evlist->stats.total_aux_collision += 1;
1336 		}
1337 		return tool->aux(tool, event, sample, machine);
1338 	case PERF_RECORD_ITRACE_START:
1339 		return tool->itrace_start(tool, event, sample, machine);
1340 	case PERF_RECORD_SWITCH:
1341 	case PERF_RECORD_SWITCH_CPU_WIDE:
1342 		return tool->context_switch(tool, event, sample, machine);
1343 	case PERF_RECORD_KSYMBOL:
1344 		return tool->ksymbol(tool, event, sample, machine);
1345 	case PERF_RECORD_BPF_EVENT:
1346 		return tool->bpf(tool, event, sample, machine);
1347 	case PERF_RECORD_TEXT_POKE:
1348 		return tool->text_poke(tool, event, sample, machine);
1349 	case PERF_RECORD_AUX_OUTPUT_HW_ID:
1350 		return tool->aux_output_hw_id(tool, event, sample, machine);
1351 	default:
1352 		++evlist->stats.nr_unknown_events;
1353 		return -1;
1354 	}
1355 }
1356 
perf_session__deliver_event(struct perf_session * session,union perf_event * event,const struct perf_tool * tool,u64 file_offset,const char * file_path)1357 static int perf_session__deliver_event(struct perf_session *session,
1358 				       union perf_event *event,
1359 				       const struct perf_tool *tool,
1360 				       u64 file_offset,
1361 				       const char *file_path)
1362 {
1363 	struct perf_sample sample;
1364 	int ret;
1365 
1366 	perf_sample__init(&sample, /*all=*/false);
1367 	ret = evlist__parse_sample(session->evlist, event, &sample);
1368 	if (ret) {
1369 		pr_err("Can't parse sample, err = %d\n", ret);
1370 		goto out;
1371 	}
1372 
1373 	ret = auxtrace__process_event(session, event, &sample, tool);
1374 	if (ret < 0)
1375 		goto out;
1376 	if (ret > 0) {
1377 		ret = 0;
1378 		goto out;
1379 	}
1380 
1381 	ret = machines__deliver_event(&session->machines, session->evlist,
1382 				      event, &sample, tool, file_offset, file_path);
1383 
1384 	if (dump_trace && sample.aux_sample.size)
1385 		auxtrace__dump_auxtrace_sample(session, &sample);
1386 out:
1387 	perf_sample__exit(&sample);
1388 	return ret;
1389 }
1390 
perf_session__process_user_event(struct perf_session * session,union perf_event * event,u64 file_offset,const char * file_path)1391 static s64 perf_session__process_user_event(struct perf_session *session,
1392 					    union perf_event *event,
1393 					    u64 file_offset,
1394 					    const char *file_path)
1395 {
1396 	struct ordered_events *oe = &session->ordered_events;
1397 	const struct perf_tool *tool = session->tool;
1398 	struct perf_sample sample;
1399 	int fd = perf_data__fd(session->data);
1400 	int err;
1401 
1402 	perf_sample__init(&sample, /*all=*/true);
1403 	if (event->header.type != PERF_RECORD_COMPRESSED || perf_tool__compressed_is_stub(tool))
1404 		dump_event(session->evlist, event, file_offset, &sample, file_path);
1405 
1406 	/* These events are processed right away */
1407 	switch (event->header.type) {
1408 	case PERF_RECORD_HEADER_ATTR:
1409 		err = tool->attr(tool, event, &session->evlist);
1410 		if (err == 0) {
1411 			perf_session__set_id_hdr_size(session);
1412 			perf_session__set_comm_exec(session);
1413 		}
1414 		break;
1415 	case PERF_RECORD_EVENT_UPDATE:
1416 		err = tool->event_update(tool, event, &session->evlist);
1417 		break;
1418 	case PERF_RECORD_HEADER_EVENT_TYPE:
1419 		/*
1420 		 * Deprecated, but we need to handle it for sake
1421 		 * of old data files create in pipe mode.
1422 		 */
1423 		err = 0;
1424 		break;
1425 	case PERF_RECORD_HEADER_TRACING_DATA:
1426 		/*
1427 		 * Setup for reading amidst mmap, but only when we
1428 		 * are in 'file' mode. The 'pipe' fd is in proper
1429 		 * place already.
1430 		 */
1431 		if (!perf_data__is_pipe(session->data))
1432 			lseek(fd, file_offset, SEEK_SET);
1433 		err = tool->tracing_data(session, event);
1434 		break;
1435 	case PERF_RECORD_HEADER_BUILD_ID:
1436 		err = tool->build_id(session, event);
1437 		break;
1438 	case PERF_RECORD_FINISHED_ROUND:
1439 		err = tool->finished_round(tool, event, oe);
1440 		break;
1441 	case PERF_RECORD_ID_INDEX:
1442 		err = tool->id_index(session, event);
1443 		break;
1444 	case PERF_RECORD_AUXTRACE_INFO:
1445 		err = tool->auxtrace_info(session, event);
1446 		break;
1447 	case PERF_RECORD_AUXTRACE:
1448 		/*
1449 		 * Setup for reading amidst mmap, but only when we
1450 		 * are in 'file' mode.  The 'pipe' fd is in proper
1451 		 * place already.
1452 		 */
1453 		if (!perf_data__is_pipe(session->data))
1454 			lseek(fd, file_offset + event->header.size, SEEK_SET);
1455 		err = tool->auxtrace(session, event);
1456 		break;
1457 	case PERF_RECORD_AUXTRACE_ERROR:
1458 		perf_session__auxtrace_error_inc(session, event);
1459 		err = tool->auxtrace_error(session, event);
1460 		break;
1461 	case PERF_RECORD_THREAD_MAP:
1462 		err = tool->thread_map(session, event);
1463 		break;
1464 	case PERF_RECORD_CPU_MAP:
1465 		err = tool->cpu_map(session, event);
1466 		break;
1467 	case PERF_RECORD_STAT_CONFIG:
1468 		err = tool->stat_config(session, event);
1469 		break;
1470 	case PERF_RECORD_STAT:
1471 		err = tool->stat(session, event);
1472 		break;
1473 	case PERF_RECORD_STAT_ROUND:
1474 		err = tool->stat_round(session, event);
1475 		break;
1476 	case PERF_RECORD_TIME_CONV:
1477 		session->time_conv = event->time_conv;
1478 		err = tool->time_conv(session, event);
1479 		break;
1480 	case PERF_RECORD_HEADER_FEATURE:
1481 		err = tool->feature(session, event);
1482 		break;
1483 	case PERF_RECORD_COMPRESSED:
1484 		err = tool->compressed(session, event, file_offset, file_path);
1485 		if (err)
1486 			dump_event(session->evlist, event, file_offset, &sample, file_path);
1487 		break;
1488 	case PERF_RECORD_FINISHED_INIT:
1489 		err = tool->finished_init(session, event);
1490 		break;
1491 	default:
1492 		err = -EINVAL;
1493 		break;
1494 	}
1495 	perf_sample__exit(&sample);
1496 	return err;
1497 }
1498 
perf_session__deliver_synth_event(struct perf_session * session,union perf_event * event,struct perf_sample * sample)1499 int perf_session__deliver_synth_event(struct perf_session *session,
1500 				      union perf_event *event,
1501 				      struct perf_sample *sample)
1502 {
1503 	struct evlist *evlist = session->evlist;
1504 	const struct perf_tool *tool = session->tool;
1505 
1506 	events_stats__inc(&evlist->stats, event->header.type);
1507 
1508 	if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1509 		return perf_session__process_user_event(session, event, 0, NULL);
1510 
1511 	return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0, NULL);
1512 }
1513 
perf_session__deliver_synth_attr_event(struct perf_session * session,const struct perf_event_attr * attr,u64 id)1514 int perf_session__deliver_synth_attr_event(struct perf_session *session,
1515 					   const struct perf_event_attr *attr,
1516 					   u64 id)
1517 {
1518 	union {
1519 		struct {
1520 			struct perf_record_header_attr attr;
1521 			u64 ids[1];
1522 		} attr_id;
1523 		union perf_event ev;
1524 	} ev = {
1525 		.attr_id.attr.header.type = PERF_RECORD_HEADER_ATTR,
1526 		.attr_id.attr.header.size = sizeof(ev.attr_id),
1527 		.attr_id.ids[0] = id,
1528 	};
1529 
1530 	if (attr->size != sizeof(ev.attr_id.attr.attr)) {
1531 		pr_debug("Unexpected perf_event_attr size\n");
1532 		return -EINVAL;
1533 	}
1534 	ev.attr_id.attr.attr = *attr;
1535 	return perf_session__deliver_synth_event(session, &ev.ev, NULL);
1536 }
1537 
event_swap(union perf_event * event,bool sample_id_all)1538 static void event_swap(union perf_event *event, bool sample_id_all)
1539 {
1540 	perf_event__swap_op swap;
1541 
1542 	swap = perf_event__swap_ops[event->header.type];
1543 	if (swap)
1544 		swap(event, sample_id_all);
1545 }
1546 
perf_session__peek_event(struct perf_session * session,off_t file_offset,void * buf,size_t buf_sz,union perf_event ** event_ptr,struct perf_sample * sample)1547 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1548 			     void *buf, size_t buf_sz,
1549 			     union perf_event **event_ptr,
1550 			     struct perf_sample *sample)
1551 {
1552 	union perf_event *event;
1553 	size_t hdr_sz, rest;
1554 	int fd;
1555 
1556 	if (session->one_mmap && !session->header.needs_swap) {
1557 		event = file_offset - session->one_mmap_offset +
1558 			session->one_mmap_addr;
1559 		goto out_parse_sample;
1560 	}
1561 
1562 	if (perf_data__is_pipe(session->data))
1563 		return -1;
1564 
1565 	fd = perf_data__fd(session->data);
1566 	hdr_sz = sizeof(struct perf_event_header);
1567 
1568 	if (buf_sz < hdr_sz)
1569 		return -1;
1570 
1571 	if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1572 	    readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1573 		return -1;
1574 
1575 	event = (union perf_event *)buf;
1576 
1577 	if (session->header.needs_swap)
1578 		perf_event_header__bswap(&event->header);
1579 
1580 	if (event->header.size < hdr_sz || event->header.size > buf_sz)
1581 		return -1;
1582 
1583 	buf += hdr_sz;
1584 	rest = event->header.size - hdr_sz;
1585 
1586 	if (readn(fd, buf, rest) != (ssize_t)rest)
1587 		return -1;
1588 
1589 	if (session->header.needs_swap)
1590 		event_swap(event, evlist__sample_id_all(session->evlist));
1591 
1592 out_parse_sample:
1593 
1594 	if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1595 	    evlist__parse_sample(session->evlist, event, sample))
1596 		return -1;
1597 
1598 	*event_ptr = event;
1599 
1600 	return 0;
1601 }
1602 
perf_session__peek_events(struct perf_session * session,u64 offset,u64 size,peek_events_cb_t cb,void * data)1603 int perf_session__peek_events(struct perf_session *session, u64 offset,
1604 			      u64 size, peek_events_cb_t cb, void *data)
1605 {
1606 	u64 max_offset = offset + size;
1607 	char buf[PERF_SAMPLE_MAX_SIZE];
1608 	union perf_event *event;
1609 	int err;
1610 
1611 	do {
1612 		err = perf_session__peek_event(session, offset, buf,
1613 					       PERF_SAMPLE_MAX_SIZE, &event,
1614 					       NULL);
1615 		if (err)
1616 			return err;
1617 
1618 		err = cb(session, event, offset, data);
1619 		if (err)
1620 			return err;
1621 
1622 		offset += event->header.size;
1623 		if (event->header.type == PERF_RECORD_AUXTRACE)
1624 			offset += event->auxtrace.size;
1625 
1626 	} while (offset < max_offset);
1627 
1628 	return err;
1629 }
1630 
perf_session__process_event(struct perf_session * session,union perf_event * event,u64 file_offset,const char * file_path)1631 static s64 perf_session__process_event(struct perf_session *session,
1632 				       union perf_event *event, u64 file_offset,
1633 				       const char *file_path)
1634 {
1635 	struct evlist *evlist = session->evlist;
1636 	const struct perf_tool *tool = session->tool;
1637 	int ret;
1638 
1639 	if (session->header.needs_swap)
1640 		event_swap(event, evlist__sample_id_all(evlist));
1641 
1642 	if (event->header.type >= PERF_RECORD_HEADER_MAX)
1643 		return -EINVAL;
1644 
1645 	events_stats__inc(&evlist->stats, event->header.type);
1646 
1647 	if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1648 		return perf_session__process_user_event(session, event, file_offset, file_path);
1649 
1650 	if (tool->ordered_events) {
1651 		u64 timestamp = -1ULL;
1652 
1653 		ret = evlist__parse_sample_timestamp(evlist, event, &timestamp);
1654 		if (ret && ret != -1)
1655 			return ret;
1656 
1657 		ret = perf_session__queue_event(session, event, timestamp, file_offset, file_path);
1658 		if (ret != -ETIME)
1659 			return ret;
1660 	}
1661 
1662 	return perf_session__deliver_event(session, event, tool, file_offset, file_path);
1663 }
1664 
perf_event_header__bswap(struct perf_event_header * hdr)1665 void perf_event_header__bswap(struct perf_event_header *hdr)
1666 {
1667 	hdr->type = bswap_32(hdr->type);
1668 	hdr->misc = bswap_16(hdr->misc);
1669 	hdr->size = bswap_16(hdr->size);
1670 }
1671 
perf_session__findnew(struct perf_session * session,pid_t pid)1672 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1673 {
1674 	return machine__findnew_thread(&session->machines.host, -1, pid);
1675 }
1676 
perf_session__register_idle_thread(struct perf_session * session)1677 int perf_session__register_idle_thread(struct perf_session *session)
1678 {
1679 	struct thread *thread = machine__idle_thread(&session->machines.host);
1680 
1681 	/* machine__idle_thread() got the thread, so put it */
1682 	thread__put(thread);
1683 	return thread ? 0 : -1;
1684 }
1685 
1686 static void
perf_session__warn_order(const struct perf_session * session)1687 perf_session__warn_order(const struct perf_session *session)
1688 {
1689 	const struct ordered_events *oe = &session->ordered_events;
1690 	struct evsel *evsel;
1691 	bool should_warn = true;
1692 
1693 	evlist__for_each_entry(session->evlist, evsel) {
1694 		if (evsel->core.attr.write_backward)
1695 			should_warn = false;
1696 	}
1697 
1698 	if (!should_warn)
1699 		return;
1700 	if (oe->nr_unordered_events != 0)
1701 		ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1702 }
1703 
perf_session__warn_about_errors(const struct perf_session * session)1704 static void perf_session__warn_about_errors(const struct perf_session *session)
1705 {
1706 	const struct events_stats *stats = &session->evlist->stats;
1707 
1708 	if (session->tool->lost == perf_event__process_lost &&
1709 	    stats->nr_events[PERF_RECORD_LOST] != 0) {
1710 		ui__warning("Processed %d events and lost %d chunks!\n\n"
1711 			    "Check IO/CPU overload!\n\n",
1712 			    stats->nr_events[0],
1713 			    stats->nr_events[PERF_RECORD_LOST]);
1714 	}
1715 
1716 	if (session->tool->lost_samples == perf_event__process_lost_samples) {
1717 		double drop_rate;
1718 
1719 		drop_rate = (double)stats->total_lost_samples /
1720 			    (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1721 		if (drop_rate > 0.05) {
1722 			ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n",
1723 				    stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1724 				    drop_rate * 100.0);
1725 		}
1726 	}
1727 
1728 	if (session->tool->aux == perf_event__process_aux &&
1729 	    stats->total_aux_lost != 0) {
1730 		ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1731 			    stats->total_aux_lost,
1732 			    stats->nr_events[PERF_RECORD_AUX]);
1733 	}
1734 
1735 	if (session->tool->aux == perf_event__process_aux &&
1736 	    stats->total_aux_partial != 0) {
1737 		bool vmm_exclusive = false;
1738 
1739 		(void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1740 		                       &vmm_exclusive);
1741 
1742 		ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1743 		            "Are you running a KVM guest in the background?%s\n\n",
1744 			    stats->total_aux_partial,
1745 			    stats->nr_events[PERF_RECORD_AUX],
1746 			    vmm_exclusive ?
1747 			    "\nReloading kvm_intel module with vmm_exclusive=0\n"
1748 			    "will reduce the gaps to only guest's timeslices." :
1749 			    "");
1750 	}
1751 
1752 	if (session->tool->aux == perf_event__process_aux &&
1753 	    stats->total_aux_collision != 0) {
1754 		ui__warning("AUX data detected collision  %" PRIu64 " times out of %u!\n\n",
1755 			    stats->total_aux_collision,
1756 			    stats->nr_events[PERF_RECORD_AUX]);
1757 	}
1758 
1759 	if (stats->nr_unknown_events != 0) {
1760 		ui__warning("Found %u unknown events!\n\n"
1761 			    "Is this an older tool processing a perf.data "
1762 			    "file generated by a more recent tool?\n\n"
1763 			    "If that is not the case, consider "
1764 			    "reporting to linux-kernel@vger.kernel.org.\n\n",
1765 			    stats->nr_unknown_events);
1766 	}
1767 
1768 	if (stats->nr_unknown_id != 0) {
1769 		ui__warning("%u samples with id not present in the header\n",
1770 			    stats->nr_unknown_id);
1771 	}
1772 
1773 	if (stats->nr_invalid_chains != 0) {
1774 		ui__warning("Found invalid callchains!\n\n"
1775 			    "%u out of %u events were discarded for this reason.\n\n"
1776 			    "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1777 			    stats->nr_invalid_chains,
1778 			    stats->nr_events[PERF_RECORD_SAMPLE]);
1779 	}
1780 
1781 	if (stats->nr_unprocessable_samples != 0) {
1782 		ui__warning("%u unprocessable samples recorded.\n"
1783 			    "Do you have a KVM guest running and not using 'perf kvm'?\n",
1784 			    stats->nr_unprocessable_samples);
1785 	}
1786 
1787 	perf_session__warn_order(session);
1788 
1789 	events_stats__auxtrace_error_warn(stats);
1790 
1791 	if (stats->nr_proc_map_timeout != 0) {
1792 		ui__warning("%d map information files for pre-existing threads were\n"
1793 			    "not processed, if there are samples for addresses they\n"
1794 			    "will not be resolved, you may find out which are these\n"
1795 			    "threads by running with -v and redirecting the output\n"
1796 			    "to a file.\n"
1797 			    "The time limit to process proc map is too short?\n"
1798 			    "Increase it by --proc-map-timeout\n",
1799 			    stats->nr_proc_map_timeout);
1800 	}
1801 }
1802 
perf_session__flush_thread_stack(struct thread * thread,void * p __maybe_unused)1803 static int perf_session__flush_thread_stack(struct thread *thread,
1804 					    void *p __maybe_unused)
1805 {
1806 	return thread_stack__flush(thread);
1807 }
1808 
perf_session__flush_thread_stacks(struct perf_session * session)1809 static int perf_session__flush_thread_stacks(struct perf_session *session)
1810 {
1811 	return machines__for_each_thread(&session->machines,
1812 					 perf_session__flush_thread_stack,
1813 					 NULL);
1814 }
1815 
1816 volatile sig_atomic_t session_done;
1817 
1818 static int __perf_session__process_decomp_events(struct perf_session *session);
1819 
__perf_session__process_pipe_events(struct perf_session * session)1820 static int __perf_session__process_pipe_events(struct perf_session *session)
1821 {
1822 	struct ordered_events *oe = &session->ordered_events;
1823 	const struct perf_tool *tool = session->tool;
1824 	struct ui_progress prog;
1825 	union perf_event *event;
1826 	uint32_t size, cur_size = 0;
1827 	void *buf = NULL;
1828 	s64 skip = 0;
1829 	u64 head;
1830 	ssize_t err;
1831 	void *p;
1832 	bool update_prog = false;
1833 
1834 	/*
1835 	 * If it's from a file saving pipe data (by redirection), it would have
1836 	 * a file name other than "-".  Then we can get the total size and show
1837 	 * the progress.
1838 	 */
1839 	if (strcmp(session->data->path, "-") && session->data->file.size) {
1840 		ui_progress__init_size(&prog, session->data->file.size,
1841 				       "Processing events...");
1842 		update_prog = true;
1843 	}
1844 
1845 	head = 0;
1846 	cur_size = sizeof(union perf_event);
1847 
1848 	buf = malloc(cur_size);
1849 	if (!buf)
1850 		return -errno;
1851 	ordered_events__set_copy_on_queue(oe, true);
1852 more:
1853 	event = buf;
1854 	err = perf_data__read(session->data, event,
1855 			      sizeof(struct perf_event_header));
1856 	if (err <= 0) {
1857 		if (err == 0)
1858 			goto done;
1859 
1860 		pr_err("failed to read event header\n");
1861 		goto out_err;
1862 	}
1863 
1864 	if (session->header.needs_swap)
1865 		perf_event_header__bswap(&event->header);
1866 
1867 	size = event->header.size;
1868 	if (size < sizeof(struct perf_event_header)) {
1869 		pr_err("bad event header size\n");
1870 		goto out_err;
1871 	}
1872 
1873 	if (size > cur_size) {
1874 		void *new = realloc(buf, size);
1875 		if (!new) {
1876 			pr_err("failed to allocate memory to read event\n");
1877 			goto out_err;
1878 		}
1879 		buf = new;
1880 		cur_size = size;
1881 		event = buf;
1882 	}
1883 	p = event;
1884 	p += sizeof(struct perf_event_header);
1885 
1886 	if (size - sizeof(struct perf_event_header)) {
1887 		err = perf_data__read(session->data, p,
1888 				      size - sizeof(struct perf_event_header));
1889 		if (err <= 0) {
1890 			if (err == 0) {
1891 				pr_err("unexpected end of event stream\n");
1892 				goto done;
1893 			}
1894 
1895 			pr_err("failed to read event data\n");
1896 			goto out_err;
1897 		}
1898 	}
1899 
1900 	if ((skip = perf_session__process_event(session, event, head, "pipe")) < 0) {
1901 		pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1902 		       head, event->header.size, event->header.type);
1903 		err = -EINVAL;
1904 		goto out_err;
1905 	}
1906 
1907 	head += size;
1908 
1909 	if (skip > 0)
1910 		head += skip;
1911 
1912 	err = __perf_session__process_decomp_events(session);
1913 	if (err)
1914 		goto out_err;
1915 
1916 	if (update_prog)
1917 		ui_progress__update(&prog, size);
1918 
1919 	if (!session_done())
1920 		goto more;
1921 done:
1922 	/* do the final flush for ordered samples */
1923 	err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1924 	if (err)
1925 		goto out_err;
1926 	err = auxtrace__flush_events(session, tool);
1927 	if (err)
1928 		goto out_err;
1929 	err = perf_session__flush_thread_stacks(session);
1930 out_err:
1931 	free(buf);
1932 	if (update_prog)
1933 		ui_progress__finish();
1934 	if (!tool->no_warn)
1935 		perf_session__warn_about_errors(session);
1936 	ordered_events__free(&session->ordered_events);
1937 	auxtrace__free_events(session);
1938 	return err;
1939 }
1940 
1941 static union perf_event *
prefetch_event(char * buf,u64 head,size_t mmap_size,bool needs_swap,union perf_event * error)1942 prefetch_event(char *buf, u64 head, size_t mmap_size,
1943 	       bool needs_swap, union perf_event *error)
1944 {
1945 	union perf_event *event;
1946 	u16 event_size;
1947 
1948 	/*
1949 	 * Ensure we have enough space remaining to read
1950 	 * the size of the event in the headers.
1951 	 */
1952 	if (head + sizeof(event->header) > mmap_size)
1953 		return NULL;
1954 
1955 	event = (union perf_event *)(buf + head);
1956 	if (needs_swap)
1957 		perf_event_header__bswap(&event->header);
1958 
1959 	event_size = event->header.size;
1960 	if (head + event_size <= mmap_size)
1961 		return event;
1962 
1963 	/* We're not fetching the event so swap back again */
1964 	if (needs_swap)
1965 		perf_event_header__bswap(&event->header);
1966 
1967 	/* Check if the event fits into the next mmapped buf. */
1968 	if (event_size <= mmap_size - head % page_size) {
1969 		/* Remap buf and fetch again. */
1970 		return NULL;
1971 	}
1972 
1973 	/* Invalid input. Event size should never exceed mmap_size. */
1974 	pr_debug("%s: head=%#" PRIx64 " event->header.size=%#x, mmap_size=%#zx:"
1975 		 " fuzzed or compressed perf.data?\n", __func__, head, event_size, mmap_size);
1976 
1977 	return error;
1978 }
1979 
1980 static union perf_event *
fetch_mmaped_event(u64 head,size_t mmap_size,char * buf,bool needs_swap)1981 fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
1982 {
1983 	return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL));
1984 }
1985 
1986 static union perf_event *
fetch_decomp_event(u64 head,size_t mmap_size,char * buf,bool needs_swap)1987 fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
1988 {
1989 	return prefetch_event(buf, head, mmap_size, needs_swap, NULL);
1990 }
1991 
__perf_session__process_decomp_events(struct perf_session * session)1992 static int __perf_session__process_decomp_events(struct perf_session *session)
1993 {
1994 	s64 skip;
1995 	u64 size;
1996 	struct decomp *decomp = session->active_decomp->decomp_last;
1997 
1998 	if (!decomp)
1999 		return 0;
2000 
2001 	while (decomp->head < decomp->size && !session_done()) {
2002 		union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data,
2003 							     session->header.needs_swap);
2004 
2005 		if (!event)
2006 			break;
2007 
2008 		size = event->header.size;
2009 
2010 		if (size < sizeof(struct perf_event_header) ||
2011 		    (skip = perf_session__process_event(session, event, decomp->file_pos,
2012 							decomp->file_path)) < 0) {
2013 			pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
2014 				decomp->file_pos + decomp->head, event->header.size, event->header.type);
2015 			return -EINVAL;
2016 		}
2017 
2018 		if (skip)
2019 			size += skip;
2020 
2021 		decomp->head += size;
2022 	}
2023 
2024 	return 0;
2025 }
2026 
2027 /*
2028  * On 64bit we can mmap the data file in one go. No need for tiny mmap
2029  * slices. On 32bit we use 32MB.
2030  */
2031 #if BITS_PER_LONG == 64
2032 #define MMAP_SIZE ULLONG_MAX
2033 #define NUM_MMAPS 1
2034 #else
2035 #define MMAP_SIZE (32 * 1024 * 1024ULL)
2036 #define NUM_MMAPS 128
2037 #endif
2038 
2039 struct reader;
2040 
2041 typedef s64 (*reader_cb_t)(struct perf_session *session,
2042 			   union perf_event *event,
2043 			   u64 file_offset,
2044 			   const char *file_path);
2045 
2046 struct reader {
2047 	int		 fd;
2048 	const char	 *path;
2049 	u64		 data_size;
2050 	u64		 data_offset;
2051 	reader_cb_t	 process;
2052 	bool		 in_place_update;
2053 	char		 *mmaps[NUM_MMAPS];
2054 	size_t		 mmap_size;
2055 	int		 mmap_idx;
2056 	char		 *mmap_cur;
2057 	u64		 file_pos;
2058 	u64		 file_offset;
2059 	u64		 head;
2060 	u64		 size;
2061 	bool		 done;
2062 	struct zstd_data   zstd_data;
2063 	struct decomp_data decomp_data;
2064 };
2065 
2066 static int
reader__init(struct reader * rd,bool * one_mmap)2067 reader__init(struct reader *rd, bool *one_mmap)
2068 {
2069 	u64 data_size = rd->data_size;
2070 	char **mmaps = rd->mmaps;
2071 
2072 	rd->head = rd->data_offset;
2073 	data_size += rd->data_offset;
2074 
2075 	rd->mmap_size = MMAP_SIZE;
2076 	if (rd->mmap_size > data_size) {
2077 		rd->mmap_size = data_size;
2078 		if (one_mmap)
2079 			*one_mmap = true;
2080 	}
2081 
2082 	memset(mmaps, 0, sizeof(rd->mmaps));
2083 
2084 	if (zstd_init(&rd->zstd_data, 0))
2085 		return -1;
2086 	rd->decomp_data.zstd_decomp = &rd->zstd_data;
2087 
2088 	return 0;
2089 }
2090 
2091 static void
reader__release_decomp(struct reader * rd)2092 reader__release_decomp(struct reader *rd)
2093 {
2094 	perf_decomp__release_events(rd->decomp_data.decomp);
2095 	zstd_fini(&rd->zstd_data);
2096 }
2097 
2098 static int
reader__mmap(struct reader * rd,struct perf_session * session)2099 reader__mmap(struct reader *rd, struct perf_session *session)
2100 {
2101 	int mmap_prot, mmap_flags;
2102 	char *buf, **mmaps = rd->mmaps;
2103 	u64 page_offset;
2104 
2105 	mmap_prot  = PROT_READ;
2106 	mmap_flags = MAP_SHARED;
2107 
2108 	if (rd->in_place_update) {
2109 		mmap_prot  |= PROT_WRITE;
2110 	} else if (session->header.needs_swap) {
2111 		mmap_prot  |= PROT_WRITE;
2112 		mmap_flags = MAP_PRIVATE;
2113 	}
2114 
2115 	if (mmaps[rd->mmap_idx]) {
2116 		munmap(mmaps[rd->mmap_idx], rd->mmap_size);
2117 		mmaps[rd->mmap_idx] = NULL;
2118 	}
2119 
2120 	page_offset = page_size * (rd->head / page_size);
2121 	rd->file_offset += page_offset;
2122 	rd->head -= page_offset;
2123 
2124 	buf = mmap(NULL, rd->mmap_size, mmap_prot, mmap_flags, rd->fd,
2125 		   rd->file_offset);
2126 	if (buf == MAP_FAILED) {
2127 		pr_err("failed to mmap file\n");
2128 		return -errno;
2129 	}
2130 	mmaps[rd->mmap_idx] = rd->mmap_cur = buf;
2131 	rd->mmap_idx = (rd->mmap_idx + 1) & (ARRAY_SIZE(rd->mmaps) - 1);
2132 	rd->file_pos = rd->file_offset + rd->head;
2133 	if (session->one_mmap) {
2134 		session->one_mmap_addr = buf;
2135 		session->one_mmap_offset = rd->file_offset;
2136 	}
2137 
2138 	return 0;
2139 }
2140 
2141 enum {
2142 	READER_OK,
2143 	READER_NODATA,
2144 };
2145 
2146 static int
reader__read_event(struct reader * rd,struct perf_session * session,struct ui_progress * prog)2147 reader__read_event(struct reader *rd, struct perf_session *session,
2148 		   struct ui_progress *prog)
2149 {
2150 	u64 size;
2151 	int err = READER_OK;
2152 	union perf_event *event;
2153 	s64 skip;
2154 
2155 	event = fetch_mmaped_event(rd->head, rd->mmap_size, rd->mmap_cur,
2156 				   session->header.needs_swap);
2157 	if (IS_ERR(event))
2158 		return PTR_ERR(event);
2159 
2160 	if (!event)
2161 		return READER_NODATA;
2162 
2163 	size = event->header.size;
2164 
2165 	skip = -EINVAL;
2166 
2167 	if (size < sizeof(struct perf_event_header) ||
2168 	    (skip = rd->process(session, event, rd->file_pos, rd->path)) < 0) {
2169 		pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n",
2170 		       rd->file_offset + rd->head, event->header.size,
2171 		       event->header.type, strerror(-skip));
2172 		err = skip;
2173 		goto out;
2174 	}
2175 
2176 	if (skip)
2177 		size += skip;
2178 
2179 	rd->size += size;
2180 	rd->head += size;
2181 	rd->file_pos += size;
2182 
2183 	err = __perf_session__process_decomp_events(session);
2184 	if (err)
2185 		goto out;
2186 
2187 	ui_progress__update(prog, size);
2188 
2189 out:
2190 	return err;
2191 }
2192 
2193 static inline bool
reader__eof(struct reader * rd)2194 reader__eof(struct reader *rd)
2195 {
2196 	return (rd->file_pos >= rd->data_size + rd->data_offset);
2197 }
2198 
2199 static int
reader__process_events(struct reader * rd,struct perf_session * session,struct ui_progress * prog)2200 reader__process_events(struct reader *rd, struct perf_session *session,
2201 		       struct ui_progress *prog)
2202 {
2203 	int err;
2204 
2205 	err = reader__init(rd, &session->one_mmap);
2206 	if (err)
2207 		goto out;
2208 
2209 	session->active_decomp = &rd->decomp_data;
2210 
2211 remap:
2212 	err = reader__mmap(rd, session);
2213 	if (err)
2214 		goto out;
2215 
2216 more:
2217 	err = reader__read_event(rd, session, prog);
2218 	if (err < 0)
2219 		goto out;
2220 	else if (err == READER_NODATA)
2221 		goto remap;
2222 
2223 	if (session_done())
2224 		goto out;
2225 
2226 	if (!reader__eof(rd))
2227 		goto more;
2228 
2229 out:
2230 	session->active_decomp = &session->decomp_data;
2231 	return err;
2232 }
2233 
process_simple(struct perf_session * session,union perf_event * event,u64 file_offset,const char * file_path)2234 static s64 process_simple(struct perf_session *session,
2235 			  union perf_event *event,
2236 			  u64 file_offset,
2237 			  const char *file_path)
2238 {
2239 	return perf_session__process_event(session, event, file_offset, file_path);
2240 }
2241 
__perf_session__process_events(struct perf_session * session)2242 static int __perf_session__process_events(struct perf_session *session)
2243 {
2244 	struct reader rd = {
2245 		.fd		= perf_data__fd(session->data),
2246 		.path		= session->data->file.path,
2247 		.data_size	= session->header.data_size,
2248 		.data_offset	= session->header.data_offset,
2249 		.process	= process_simple,
2250 		.in_place_update = session->data->in_place_update,
2251 	};
2252 	struct ordered_events *oe = &session->ordered_events;
2253 	const struct perf_tool *tool = session->tool;
2254 	struct ui_progress prog;
2255 	int err;
2256 
2257 	if (rd.data_size == 0)
2258 		return -1;
2259 
2260 	ui_progress__init_size(&prog, rd.data_size, "Processing events...");
2261 
2262 	err = reader__process_events(&rd, session, &prog);
2263 	if (err)
2264 		goto out_err;
2265 	/* do the final flush for ordered samples */
2266 	err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2267 	if (err)
2268 		goto out_err;
2269 	err = auxtrace__flush_events(session, tool);
2270 	if (err)
2271 		goto out_err;
2272 	err = perf_session__flush_thread_stacks(session);
2273 out_err:
2274 	ui_progress__finish();
2275 	if (!tool->no_warn)
2276 		perf_session__warn_about_errors(session);
2277 	/*
2278 	 * We may switching perf.data output, make ordered_events
2279 	 * reusable.
2280 	 */
2281 	ordered_events__reinit(&session->ordered_events);
2282 	auxtrace__free_events(session);
2283 	reader__release_decomp(&rd);
2284 	session->one_mmap = false;
2285 	return err;
2286 }
2287 
2288 /*
2289  * Processing 2 MB of data from each reader in sequence,
2290  * because that's the way the ordered events sorting works
2291  * most efficiently.
2292  */
2293 #define READER_MAX_SIZE (2 * 1024 * 1024)
2294 
2295 /*
2296  * This function reads, merge and process directory data.
2297  * It assumens the version 1 of directory data, where each
2298  * data file holds per-cpu data, already sorted by kernel.
2299  */
__perf_session__process_dir_events(struct perf_session * session)2300 static int __perf_session__process_dir_events(struct perf_session *session)
2301 {
2302 	struct perf_data *data = session->data;
2303 	const struct perf_tool *tool = session->tool;
2304 	int i, ret, readers, nr_readers;
2305 	struct ui_progress prog;
2306 	u64 total_size = perf_data__size(session->data);
2307 	struct reader *rd;
2308 
2309 	ui_progress__init_size(&prog, total_size, "Processing events...");
2310 
2311 	nr_readers = 1;
2312 	for (i = 0; i < data->dir.nr; i++) {
2313 		if (data->dir.files[i].size)
2314 			nr_readers++;
2315 	}
2316 
2317 	rd = zalloc(nr_readers * sizeof(struct reader));
2318 	if (!rd)
2319 		return -ENOMEM;
2320 
2321 	rd[0] = (struct reader) {
2322 		.fd		 = perf_data__fd(session->data),
2323 		.path		 = session->data->file.path,
2324 		.data_size	 = session->header.data_size,
2325 		.data_offset	 = session->header.data_offset,
2326 		.process	 = process_simple,
2327 		.in_place_update = session->data->in_place_update,
2328 	};
2329 	ret = reader__init(&rd[0], NULL);
2330 	if (ret)
2331 		goto out_err;
2332 	ret = reader__mmap(&rd[0], session);
2333 	if (ret)
2334 		goto out_err;
2335 	readers = 1;
2336 
2337 	for (i = 0; i < data->dir.nr; i++) {
2338 		if (!data->dir.files[i].size)
2339 			continue;
2340 		rd[readers] = (struct reader) {
2341 			.fd		 = data->dir.files[i].fd,
2342 			.path		 = data->dir.files[i].path,
2343 			.data_size	 = data->dir.files[i].size,
2344 			.data_offset	 = 0,
2345 			.process	 = process_simple,
2346 			.in_place_update = session->data->in_place_update,
2347 		};
2348 		ret = reader__init(&rd[readers], NULL);
2349 		if (ret)
2350 			goto out_err;
2351 		ret = reader__mmap(&rd[readers], session);
2352 		if (ret)
2353 			goto out_err;
2354 		readers++;
2355 	}
2356 
2357 	i = 0;
2358 	while (readers) {
2359 		if (session_done())
2360 			break;
2361 
2362 		if (rd[i].done) {
2363 			i = (i + 1) % nr_readers;
2364 			continue;
2365 		}
2366 		if (reader__eof(&rd[i])) {
2367 			rd[i].done = true;
2368 			readers--;
2369 			continue;
2370 		}
2371 
2372 		session->active_decomp = &rd[i].decomp_data;
2373 		ret = reader__read_event(&rd[i], session, &prog);
2374 		if (ret < 0) {
2375 			goto out_err;
2376 		} else if (ret == READER_NODATA) {
2377 			ret = reader__mmap(&rd[i], session);
2378 			if (ret)
2379 				goto out_err;
2380 		}
2381 
2382 		if (rd[i].size >= READER_MAX_SIZE) {
2383 			rd[i].size = 0;
2384 			i = (i + 1) % nr_readers;
2385 		}
2386 	}
2387 
2388 	ret = ordered_events__flush(&session->ordered_events, OE_FLUSH__FINAL);
2389 	if (ret)
2390 		goto out_err;
2391 
2392 	ret = perf_session__flush_thread_stacks(session);
2393 out_err:
2394 	ui_progress__finish();
2395 
2396 	if (!tool->no_warn)
2397 		perf_session__warn_about_errors(session);
2398 
2399 	/*
2400 	 * We may switching perf.data output, make ordered_events
2401 	 * reusable.
2402 	 */
2403 	ordered_events__reinit(&session->ordered_events);
2404 
2405 	session->one_mmap = false;
2406 
2407 	session->active_decomp = &session->decomp_data;
2408 	for (i = 0; i < nr_readers; i++)
2409 		reader__release_decomp(&rd[i]);
2410 	zfree(&rd);
2411 
2412 	return ret;
2413 }
2414 
perf_session__process_events(struct perf_session * session)2415 int perf_session__process_events(struct perf_session *session)
2416 {
2417 	if (perf_session__register_idle_thread(session) < 0)
2418 		return -ENOMEM;
2419 
2420 	if (perf_data__is_pipe(session->data))
2421 		return __perf_session__process_pipe_events(session);
2422 
2423 	if (perf_data__is_dir(session->data) && session->data->dir.nr)
2424 		return __perf_session__process_dir_events(session);
2425 
2426 	return __perf_session__process_events(session);
2427 }
2428 
perf_session__has_traces(struct perf_session * session,const char * msg)2429 bool perf_session__has_traces(struct perf_session *session, const char *msg)
2430 {
2431 	struct evsel *evsel;
2432 
2433 	evlist__for_each_entry(session->evlist, evsel) {
2434 		if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT)
2435 			return true;
2436 	}
2437 
2438 	pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
2439 	return false;
2440 }
2441 
perf_session__has_switch_events(struct perf_session * session)2442 bool perf_session__has_switch_events(struct perf_session *session)
2443 {
2444 	struct evsel *evsel;
2445 
2446 	evlist__for_each_entry(session->evlist, evsel) {
2447 		if (evsel->core.attr.context_switch)
2448 			return true;
2449 	}
2450 
2451 	return false;
2452 }
2453 
map__set_kallsyms_ref_reloc_sym(struct map * map,const char * symbol_name,u64 addr)2454 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr)
2455 {
2456 	char *bracket;
2457 	struct ref_reloc_sym *ref;
2458 	struct kmap *kmap;
2459 
2460 	ref = zalloc(sizeof(struct ref_reloc_sym));
2461 	if (ref == NULL)
2462 		return -ENOMEM;
2463 
2464 	ref->name = strdup(symbol_name);
2465 	if (ref->name == NULL) {
2466 		free(ref);
2467 		return -ENOMEM;
2468 	}
2469 
2470 	bracket = strchr(ref->name, ']');
2471 	if (bracket)
2472 		*bracket = '\0';
2473 
2474 	ref->addr = addr;
2475 
2476 	kmap = map__kmap(map);
2477 	if (kmap)
2478 		kmap->ref_reloc_sym = ref;
2479 
2480 	return 0;
2481 }
2482 
perf_session__fprintf_dsos(struct perf_session * session,FILE * fp)2483 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
2484 {
2485 	return machines__fprintf_dsos(&session->machines, fp);
2486 }
2487 
perf_session__fprintf_dsos_buildid(struct perf_session * session,FILE * fp,bool (skip)(struct dso * dso,int parm),int parm)2488 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
2489 					  bool (skip)(struct dso *dso, int parm), int parm)
2490 {
2491 	return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
2492 }
2493 
perf_session__fprintf_nr_events(struct perf_session * session,FILE * fp)2494 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
2495 {
2496 	size_t ret;
2497 	const char *msg = "";
2498 
2499 	if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
2500 		msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
2501 
2502 	ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
2503 
2504 	ret += events_stats__fprintf(&session->evlist->stats, fp);
2505 	return ret;
2506 }
2507 
perf_session__fprintf(struct perf_session * session,FILE * fp)2508 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2509 {
2510 	/*
2511 	 * FIXME: Here we have to actually print all the machines in this
2512 	 * session, not just the host...
2513 	 */
2514 	return machine__fprintf(&session->machines.host, fp);
2515 }
2516 
perf_session__dump_kmaps(struct perf_session * session)2517 void perf_session__dump_kmaps(struct perf_session *session)
2518 {
2519 	int save_verbose = verbose;
2520 
2521 	fflush(stdout);
2522 	fprintf(stderr, "Kernel and module maps:\n");
2523 	verbose = 0; /* Suppress verbose to print a summary only */
2524 	maps__fprintf(machine__kernel_maps(&session->machines.host), stderr);
2525 	verbose = save_verbose;
2526 }
2527 
perf_session__find_first_evtype(struct perf_session * session,unsigned int type)2528 struct evsel *perf_session__find_first_evtype(struct perf_session *session,
2529 					      unsigned int type)
2530 {
2531 	struct evsel *pos;
2532 
2533 	evlist__for_each_entry(session->evlist, pos) {
2534 		if (pos->core.attr.type == type)
2535 			return pos;
2536 	}
2537 	return NULL;
2538 }
2539 
perf_session__cpu_bitmap(struct perf_session * session,const char * cpu_list,unsigned long * cpu_bitmap)2540 int perf_session__cpu_bitmap(struct perf_session *session,
2541 			     const char *cpu_list, unsigned long *cpu_bitmap)
2542 {
2543 	int i, err = -1;
2544 	struct perf_cpu_map *map;
2545 	int nr_cpus = min(session->header.env.nr_cpus_avail, MAX_NR_CPUS);
2546 	struct perf_cpu cpu;
2547 
2548 	for (i = 0; i < PERF_TYPE_MAX; ++i) {
2549 		struct evsel *evsel;
2550 
2551 		evsel = perf_session__find_first_evtype(session, i);
2552 		if (!evsel)
2553 			continue;
2554 
2555 		if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) {
2556 			pr_err("File does not contain CPU events. "
2557 			       "Remove -C option to proceed.\n");
2558 			return -1;
2559 		}
2560 	}
2561 
2562 	map = perf_cpu_map__new(cpu_list);
2563 	if (map == NULL) {
2564 		pr_err("Invalid cpu_list\n");
2565 		return -1;
2566 	}
2567 
2568 	perf_cpu_map__for_each_cpu(cpu, i, map) {
2569 		if (cpu.cpu >= nr_cpus) {
2570 			pr_err("Requested CPU %d too large. "
2571 			       "Consider raising MAX_NR_CPUS\n", cpu.cpu);
2572 			goto out_delete_map;
2573 		}
2574 
2575 		__set_bit(cpu.cpu, cpu_bitmap);
2576 	}
2577 
2578 	err = 0;
2579 
2580 out_delete_map:
2581 	perf_cpu_map__put(map);
2582 	return err;
2583 }
2584 
perf_session__fprintf_info(struct perf_session * session,FILE * fp,bool full)2585 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2586 				bool full)
2587 {
2588 	if (session == NULL || fp == NULL)
2589 		return;
2590 
2591 	fprintf(fp, "# ========\n");
2592 	perf_header__fprintf_info(session, fp, full);
2593 	fprintf(fp, "# ========\n#\n");
2594 }
2595 
perf_session__register_guest(struct perf_session * session,pid_t machine_pid)2596 static int perf_session__register_guest(struct perf_session *session, pid_t machine_pid)
2597 {
2598 	struct machine *machine = machines__findnew(&session->machines, machine_pid);
2599 	struct thread *thread;
2600 
2601 	if (!machine)
2602 		return -ENOMEM;
2603 
2604 	machine->single_address_space = session->machines.host.single_address_space;
2605 
2606 	thread = machine__idle_thread(machine);
2607 	if (!thread)
2608 		return -ENOMEM;
2609 	thread__put(thread);
2610 
2611 	machine->kallsyms_filename = perf_data__guest_kallsyms_name(session->data, machine_pid);
2612 
2613 	return 0;
2614 }
2615 
perf_session__set_guest_cpu(struct perf_session * session,pid_t pid,pid_t tid,int guest_cpu)2616 static int perf_session__set_guest_cpu(struct perf_session *session, pid_t pid,
2617 				       pid_t tid, int guest_cpu)
2618 {
2619 	struct machine *machine = &session->machines.host;
2620 	struct thread *thread = machine__findnew_thread(machine, pid, tid);
2621 
2622 	if (!thread)
2623 		return -ENOMEM;
2624 	thread__set_guest_cpu(thread, guest_cpu);
2625 	thread__put(thread);
2626 
2627 	return 0;
2628 }
2629 
perf_event__process_id_index(struct perf_session * session,union perf_event * event)2630 int perf_event__process_id_index(struct perf_session *session,
2631 				 union perf_event *event)
2632 {
2633 	struct evlist *evlist = session->evlist;
2634 	struct perf_record_id_index *ie = &event->id_index;
2635 	size_t sz = ie->header.size - sizeof(*ie);
2636 	size_t i, nr, max_nr;
2637 	size_t e1_sz = sizeof(struct id_index_entry);
2638 	size_t e2_sz = sizeof(struct id_index_entry_2);
2639 	size_t etot_sz = e1_sz + e2_sz;
2640 	struct id_index_entry_2 *e2;
2641 	pid_t last_pid = 0;
2642 
2643 	max_nr = sz / e1_sz;
2644 	nr = ie->nr;
2645 	if (nr > max_nr) {
2646 		printf("Too big: nr %zu max_nr %zu\n", nr, max_nr);
2647 		return -EINVAL;
2648 	}
2649 
2650 	if (sz >= nr * etot_sz) {
2651 		max_nr = sz / etot_sz;
2652 		if (nr > max_nr) {
2653 			printf("Too big2: nr %zu max_nr %zu\n", nr, max_nr);
2654 			return -EINVAL;
2655 		}
2656 		e2 = (void *)ie + sizeof(*ie) + nr * e1_sz;
2657 	} else {
2658 		e2 = NULL;
2659 	}
2660 
2661 	if (dump_trace)
2662 		fprintf(stdout, " nr: %zu\n", nr);
2663 
2664 	for (i = 0; i < nr; i++, (e2 ? e2++ : 0)) {
2665 		struct id_index_entry *e = &ie->entries[i];
2666 		struct perf_sample_id *sid;
2667 		int ret;
2668 
2669 		if (dump_trace) {
2670 			fprintf(stdout,	" ... id: %"PRI_lu64, e->id);
2671 			fprintf(stdout,	"  idx: %"PRI_lu64, e->idx);
2672 			fprintf(stdout,	"  cpu: %"PRI_ld64, e->cpu);
2673 			fprintf(stdout, "  tid: %"PRI_ld64, e->tid);
2674 			if (e2) {
2675 				fprintf(stdout, "  machine_pid: %"PRI_ld64, e2->machine_pid);
2676 				fprintf(stdout, "  vcpu: %"PRI_lu64"\n", e2->vcpu);
2677 			} else {
2678 				fprintf(stdout, "\n");
2679 			}
2680 		}
2681 
2682 		sid = evlist__id2sid(evlist, e->id);
2683 		if (!sid)
2684 			return -ENOENT;
2685 
2686 		sid->idx = e->idx;
2687 		sid->cpu.cpu = e->cpu;
2688 		sid->tid = e->tid;
2689 
2690 		if (!e2)
2691 			continue;
2692 
2693 		sid->machine_pid = e2->machine_pid;
2694 		sid->vcpu.cpu = e2->vcpu;
2695 
2696 		if (!sid->machine_pid)
2697 			continue;
2698 
2699 		if (sid->machine_pid != last_pid) {
2700 			ret = perf_session__register_guest(session, sid->machine_pid);
2701 			if (ret)
2702 				return ret;
2703 			last_pid = sid->machine_pid;
2704 			perf_guest = true;
2705 		}
2706 
2707 		ret = perf_session__set_guest_cpu(session, sid->machine_pid, e->tid, e2->vcpu);
2708 		if (ret)
2709 			return ret;
2710 	}
2711 	return 0;
2712 }
2713 
perf_session__dsos_hit_all(struct perf_session * session)2714 int perf_session__dsos_hit_all(struct perf_session *session)
2715 {
2716 	struct rb_node *nd;
2717 	int err;
2718 
2719 	err = machine__hit_all_dsos(&session->machines.host);
2720 	if (err)
2721 		return err;
2722 
2723 	for (nd = rb_first_cached(&session->machines.guests); nd;
2724 	     nd = rb_next(nd)) {
2725 		struct machine *pos = rb_entry(nd, struct machine, rb_node);
2726 
2727 		err = machine__hit_all_dsos(pos);
2728 		if (err)
2729 			return err;
2730 	}
2731 
2732 	return 0;
2733 }
2734