1// SPDX-License-Identifier: GPL-2.0
   2#include <errno.h>
   3#include <inttypes.h>
   4#include <linux/kernel.h>
   5#include <traceevent/event-parse.h>
   6#include <api/fs/fs.h>
   7
   8#include <byteswap.h>
   9#include <unistd.h>
  10#include <sys/types.h>
  11#include <sys/mman.h>
  12
  13#include "evlist.h"
  14#include "evsel.h"
  15#include "memswap.h"
  16#include "session.h"
  17#include "tool.h"
  18#include "sort.h"
  19#include "util.h"
  20#include "cpumap.h"
  21#include "perf_regs.h"
  22#include "asm/bug.h"
  23#include "auxtrace.h"
  24#include "thread.h"
  25#include "thread-stack.h"
  26#include "stat.h"
  27
  28static int perf_session__deliver_event(struct perf_session *session,
  29				       union perf_event *event,
 
  30				       struct perf_tool *tool,
  31				       u64 file_offset);
  32
  33static int perf_session__open(struct perf_session *session)
  34{
  35	struct perf_data *data = session->data;
  36
  37	if (perf_session__read_header(session) < 0) {
  38		pr_err("incompatible file format (rerun with -v to learn more)\n");
  39		return -1;
  40	}
  41
  42	if (perf_data__is_pipe(data))
  43		return 0;
  44
  45	if (perf_header__has_feat(&session->header, HEADER_STAT))
  46		return 0;
  47
  48	if (!perf_evlist__valid_sample_type(session->evlist)) {
  49		pr_err("non matching sample_type\n");
  50		return -1;
  51	}
  52
  53	if (!perf_evlist__valid_sample_id_all(session->evlist)) {
  54		pr_err("non matching sample_id_all\n");
  55		return -1;
  56	}
  57
  58	if (!perf_evlist__valid_read_format(session->evlist)) {
  59		pr_err("non matching read_format\n");
  60		return -1;
  61	}
  62
  63	return 0;
  64}
  65
  66void perf_session__set_id_hdr_size(struct perf_session *session)
  67{
  68	u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
  69
  70	machines__set_id_hdr_size(&session->machines, id_hdr_size);
  71}
  72
  73int perf_session__create_kernel_maps(struct perf_session *session)
  74{
  75	int ret = machine__create_kernel_maps(&session->machines.host);
  76
  77	if (ret >= 0)
  78		ret = machines__create_guest_kernel_maps(&session->machines);
  79	return ret;
  80}
  81
  82static void perf_session__destroy_kernel_maps(struct perf_session *session)
  83{
  84	machines__destroy_kernel_maps(&session->machines);
  85}
  86
  87static bool perf_session__has_comm_exec(struct perf_session *session)
  88{
  89	struct perf_evsel *evsel;
  90
  91	evlist__for_each_entry(session->evlist, evsel) {
  92		if (evsel->attr.comm_exec)
  93			return true;
  94	}
  95
  96	return false;
  97}
  98
  99static void perf_session__set_comm_exec(struct perf_session *session)
 100{
 101	bool comm_exec = perf_session__has_comm_exec(session);
 102
 103	machines__set_comm_exec(&session->machines, comm_exec);
 104}
 105
 106static int ordered_events__deliver_event(struct ordered_events *oe,
 107					 struct ordered_event *event)
 108{
 
 109	struct perf_session *session = container_of(oe, struct perf_session,
 110						    ordered_events);
 
 111
 112	return perf_session__deliver_event(session, event->event,
 
 
 
 
 
 113					   session->tool, event->file_offset);
 114}
 115
 116struct perf_session *perf_session__new(struct perf_data *data,
 117				       bool repipe, struct perf_tool *tool)
 118{
 119	struct perf_session *session = zalloc(sizeof(*session));
 120
 121	if (!session)
 122		goto out;
 123
 124	session->repipe = repipe;
 125	session->tool   = tool;
 126	INIT_LIST_HEAD(&session->auxtrace_index);
 127	machines__init(&session->machines);
 128	ordered_events__init(&session->ordered_events, ordered_events__deliver_event);
 129
 130	if (data) {
 131		if (perf_data__open(data))
 132			goto out_delete;
 133
 134		session->data = data;
 135
 136		if (perf_data__is_read(data)) {
 137			if (perf_session__open(session) < 0)
 138				goto out_close;
 139
 140			/*
 141			 * set session attributes that are present in perf.data
 142			 * but not in pipe-mode.
 143			 */
 144			if (!data->is_pipe) {
 145				perf_session__set_id_hdr_size(session);
 146				perf_session__set_comm_exec(session);
 147			}
 148		}
 149	} else  {
 150		session->machines.host.env = &perf_env;
 151	}
 152
 153	if (!data || perf_data__is_write(data)) {
 154		/*
 155		 * In O_RDONLY mode this will be performed when reading the
 156		 * kernel MMAP event, in perf_event__process_mmap().
 157		 */
 158		if (perf_session__create_kernel_maps(session) < 0)
 159			pr_warning("Cannot read kernel map\n");
 160	}
 161
 162	/*
 163	 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
 164	 * processed, so perf_evlist__sample_id_all is not meaningful here.
 165	 */
 166	if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps &&
 167	    tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
 168		dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
 169		tool->ordered_events = false;
 170	}
 171
 172	return session;
 173
 174 out_close:
 175	perf_data__close(data);
 176 out_delete:
 177	perf_session__delete(session);
 178 out:
 179	return NULL;
 180}
 181
 182static void perf_session__delete_threads(struct perf_session *session)
 183{
 184	machine__delete_threads(&session->machines.host);
 185}
 186
 187void perf_session__delete(struct perf_session *session)
 188{
 189	if (session == NULL)
 190		return;
 191	auxtrace__free(session);
 192	auxtrace_index__free(&session->auxtrace_index);
 193	perf_session__destroy_kernel_maps(session);
 194	perf_session__delete_threads(session);
 195	perf_env__exit(&session->header.env);
 196	machines__exit(&session->machines);
 197	if (session->data)
 198		perf_data__close(session->data);
 199	free(session);
 200}
 201
 202static int process_event_synth_tracing_data_stub(struct perf_tool *tool
 203						 __maybe_unused,
 204						 union perf_event *event
 205						 __maybe_unused,
 206						 struct perf_session *session
 207						__maybe_unused)
 208{
 209	dump_printf(": unhandled!\n");
 210	return 0;
 211}
 212
 213static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
 214					 union perf_event *event __maybe_unused,
 215					 struct perf_evlist **pevlist
 216					 __maybe_unused)
 217{
 218	dump_printf(": unhandled!\n");
 219	return 0;
 220}
 221
 222static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
 223						 union perf_event *event __maybe_unused,
 224						 struct perf_evlist **pevlist
 225						 __maybe_unused)
 226{
 227	if (dump_trace)
 228		perf_event__fprintf_event_update(event, stdout);
 229
 230	dump_printf(": unhandled!\n");
 231	return 0;
 232}
 233
 234static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
 235				     union perf_event *event __maybe_unused,
 236				     struct perf_sample *sample __maybe_unused,
 237				     struct perf_evsel *evsel __maybe_unused,
 238				     struct machine *machine __maybe_unused)
 239{
 240	dump_printf(": unhandled!\n");
 241	return 0;
 242}
 243
 244static int process_event_stub(struct perf_tool *tool __maybe_unused,
 245			      union perf_event *event __maybe_unused,
 246			      struct perf_sample *sample __maybe_unused,
 247			      struct machine *machine __maybe_unused)
 248{
 249	dump_printf(": unhandled!\n");
 250	return 0;
 251}
 252
 253static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
 254				       union perf_event *event __maybe_unused,
 255				       struct ordered_events *oe __maybe_unused)
 256{
 257	dump_printf(": unhandled!\n");
 258	return 0;
 259}
 260
 261static int process_finished_round(struct perf_tool *tool,
 262				  union perf_event *event,
 263				  struct ordered_events *oe);
 264
 265static int skipn(int fd, off_t n)
 266{
 267	char buf[4096];
 268	ssize_t ret;
 269
 270	while (n > 0) {
 271		ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
 272		if (ret <= 0)
 273			return ret;
 274		n -= ret;
 275	}
 276
 277	return 0;
 278}
 279
 280static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
 281				       union perf_event *event,
 282				       struct perf_session *session
 283				       __maybe_unused)
 284{
 285	dump_printf(": unhandled!\n");
 286	if (perf_data__is_pipe(session->data))
 287		skipn(perf_data__fd(session->data), event->auxtrace.size);
 288	return event->auxtrace.size;
 289}
 290
 291static int process_event_op2_stub(struct perf_tool *tool __maybe_unused,
 292				  union perf_event *event __maybe_unused,
 293				  struct perf_session *session __maybe_unused)
 294{
 295	dump_printf(": unhandled!\n");
 296	return 0;
 297}
 298
 299
 300static
 301int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused,
 302				  union perf_event *event __maybe_unused,
 303				  struct perf_session *session __maybe_unused)
 304{
 305	if (dump_trace)
 306		perf_event__fprintf_thread_map(event, stdout);
 307
 308	dump_printf(": unhandled!\n");
 309	return 0;
 310}
 311
 312static
 313int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused,
 314			       union perf_event *event __maybe_unused,
 315			       struct perf_session *session __maybe_unused)
 316{
 317	if (dump_trace)
 318		perf_event__fprintf_cpu_map(event, stdout);
 319
 320	dump_printf(": unhandled!\n");
 321	return 0;
 322}
 323
 324static
 325int process_event_stat_config_stub(struct perf_tool *tool __maybe_unused,
 326				   union perf_event *event __maybe_unused,
 327				   struct perf_session *session __maybe_unused)
 328{
 329	if (dump_trace)
 330		perf_event__fprintf_stat_config(event, stdout);
 331
 332	dump_printf(": unhandled!\n");
 333	return 0;
 334}
 335
 336static int process_stat_stub(struct perf_tool *tool __maybe_unused,
 337			     union perf_event *event __maybe_unused,
 338			     struct perf_session *perf_session
 339			     __maybe_unused)
 340{
 341	if (dump_trace)
 342		perf_event__fprintf_stat(event, stdout);
 343
 344	dump_printf(": unhandled!\n");
 345	return 0;
 346}
 347
 348static int process_stat_round_stub(struct perf_tool *tool __maybe_unused,
 349				   union perf_event *event __maybe_unused,
 350				   struct perf_session *perf_session
 351				   __maybe_unused)
 352{
 353	if (dump_trace)
 354		perf_event__fprintf_stat_round(event, stdout);
 355
 356	dump_printf(": unhandled!\n");
 357	return 0;
 358}
 359
 360void perf_tool__fill_defaults(struct perf_tool *tool)
 361{
 362	if (tool->sample == NULL)
 363		tool->sample = process_event_sample_stub;
 364	if (tool->mmap == NULL)
 365		tool->mmap = process_event_stub;
 366	if (tool->mmap2 == NULL)
 367		tool->mmap2 = process_event_stub;
 368	if (tool->comm == NULL)
 369		tool->comm = process_event_stub;
 370	if (tool->namespaces == NULL)
 371		tool->namespaces = process_event_stub;
 372	if (tool->fork == NULL)
 373		tool->fork = process_event_stub;
 374	if (tool->exit == NULL)
 375		tool->exit = process_event_stub;
 376	if (tool->lost == NULL)
 377		tool->lost = perf_event__process_lost;
 378	if (tool->lost_samples == NULL)
 379		tool->lost_samples = perf_event__process_lost_samples;
 380	if (tool->aux == NULL)
 381		tool->aux = perf_event__process_aux;
 382	if (tool->itrace_start == NULL)
 383		tool->itrace_start = perf_event__process_itrace_start;
 384	if (tool->context_switch == NULL)
 385		tool->context_switch = perf_event__process_switch;
 386	if (tool->read == NULL)
 387		tool->read = process_event_sample_stub;
 388	if (tool->throttle == NULL)
 389		tool->throttle = process_event_stub;
 390	if (tool->unthrottle == NULL)
 391		tool->unthrottle = process_event_stub;
 392	if (tool->attr == NULL)
 393		tool->attr = process_event_synth_attr_stub;
 394	if (tool->event_update == NULL)
 395		tool->event_update = process_event_synth_event_update_stub;
 396	if (tool->tracing_data == NULL)
 397		tool->tracing_data = process_event_synth_tracing_data_stub;
 398	if (tool->build_id == NULL)
 399		tool->build_id = process_event_op2_stub;
 400	if (tool->finished_round == NULL) {
 401		if (tool->ordered_events)
 402			tool->finished_round = process_finished_round;
 403		else
 404			tool->finished_round = process_finished_round_stub;
 405	}
 406	if (tool->id_index == NULL)
 407		tool->id_index = process_event_op2_stub;
 408	if (tool->auxtrace_info == NULL)
 409		tool->auxtrace_info = process_event_op2_stub;
 410	if (tool->auxtrace == NULL)
 411		tool->auxtrace = process_event_auxtrace_stub;
 412	if (tool->auxtrace_error == NULL)
 413		tool->auxtrace_error = process_event_op2_stub;
 414	if (tool->thread_map == NULL)
 415		tool->thread_map = process_event_thread_map_stub;
 416	if (tool->cpu_map == NULL)
 417		tool->cpu_map = process_event_cpu_map_stub;
 418	if (tool->stat_config == NULL)
 419		tool->stat_config = process_event_stat_config_stub;
 420	if (tool->stat == NULL)
 421		tool->stat = process_stat_stub;
 422	if (tool->stat_round == NULL)
 423		tool->stat_round = process_stat_round_stub;
 424	if (tool->time_conv == NULL)
 425		tool->time_conv = process_event_op2_stub;
 426	if (tool->feature == NULL)
 427		tool->feature = process_event_op2_stub;
 428}
 429
 430static void swap_sample_id_all(union perf_event *event, void *data)
 431{
 432	void *end = (void *) event + event->header.size;
 433	int size = end - data;
 434
 435	BUG_ON(size % sizeof(u64));
 436	mem_bswap_64(data, size);
 437}
 438
 439static void perf_event__all64_swap(union perf_event *event,
 440				   bool sample_id_all __maybe_unused)
 441{
 442	struct perf_event_header *hdr = &event->header;
 443	mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 444}
 445
 446static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
 447{
 448	event->comm.pid = bswap_32(event->comm.pid);
 449	event->comm.tid = bswap_32(event->comm.tid);
 450
 451	if (sample_id_all) {
 452		void *data = &event->comm.comm;
 453
 454		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 455		swap_sample_id_all(event, data);
 456	}
 457}
 458
 459static void perf_event__mmap_swap(union perf_event *event,
 460				  bool sample_id_all)
 461{
 462	event->mmap.pid	  = bswap_32(event->mmap.pid);
 463	event->mmap.tid	  = bswap_32(event->mmap.tid);
 464	event->mmap.start = bswap_64(event->mmap.start);
 465	event->mmap.len	  = bswap_64(event->mmap.len);
 466	event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 467
 468	if (sample_id_all) {
 469		void *data = &event->mmap.filename;
 470
 471		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 472		swap_sample_id_all(event, data);
 473	}
 474}
 475
 476static void perf_event__mmap2_swap(union perf_event *event,
 477				  bool sample_id_all)
 478{
 479	event->mmap2.pid   = bswap_32(event->mmap2.pid);
 480	event->mmap2.tid   = bswap_32(event->mmap2.tid);
 481	event->mmap2.start = bswap_64(event->mmap2.start);
 482	event->mmap2.len   = bswap_64(event->mmap2.len);
 483	event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
 484	event->mmap2.maj   = bswap_32(event->mmap2.maj);
 485	event->mmap2.min   = bswap_32(event->mmap2.min);
 486	event->mmap2.ino   = bswap_64(event->mmap2.ino);
 487
 488	if (sample_id_all) {
 489		void *data = &event->mmap2.filename;
 490
 491		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 492		swap_sample_id_all(event, data);
 493	}
 494}
 495static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
 496{
 497	event->fork.pid	 = bswap_32(event->fork.pid);
 498	event->fork.tid	 = bswap_32(event->fork.tid);
 499	event->fork.ppid = bswap_32(event->fork.ppid);
 500	event->fork.ptid = bswap_32(event->fork.ptid);
 501	event->fork.time = bswap_64(event->fork.time);
 502
 503	if (sample_id_all)
 504		swap_sample_id_all(event, &event->fork + 1);
 505}
 506
 507static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
 508{
 509	event->read.pid		 = bswap_32(event->read.pid);
 510	event->read.tid		 = bswap_32(event->read.tid);
 511	event->read.value	 = bswap_64(event->read.value);
 512	event->read.time_enabled = bswap_64(event->read.time_enabled);
 513	event->read.time_running = bswap_64(event->read.time_running);
 514	event->read.id		 = bswap_64(event->read.id);
 515
 516	if (sample_id_all)
 517		swap_sample_id_all(event, &event->read + 1);
 518}
 519
 520static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
 521{
 522	event->aux.aux_offset = bswap_64(event->aux.aux_offset);
 523	event->aux.aux_size   = bswap_64(event->aux.aux_size);
 524	event->aux.flags      = bswap_64(event->aux.flags);
 525
 526	if (sample_id_all)
 527		swap_sample_id_all(event, &event->aux + 1);
 528}
 529
 530static void perf_event__itrace_start_swap(union perf_event *event,
 531					  bool sample_id_all)
 532{
 533	event->itrace_start.pid	 = bswap_32(event->itrace_start.pid);
 534	event->itrace_start.tid	 = bswap_32(event->itrace_start.tid);
 535
 536	if (sample_id_all)
 537		swap_sample_id_all(event, &event->itrace_start + 1);
 538}
 539
 540static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
 541{
 542	if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
 543		event->context_switch.next_prev_pid =
 544				bswap_32(event->context_switch.next_prev_pid);
 545		event->context_switch.next_prev_tid =
 546				bswap_32(event->context_switch.next_prev_tid);
 547	}
 548
 549	if (sample_id_all)
 550		swap_sample_id_all(event, &event->context_switch + 1);
 551}
 552
 553static void perf_event__throttle_swap(union perf_event *event,
 554				      bool sample_id_all)
 555{
 556	event->throttle.time	  = bswap_64(event->throttle.time);
 557	event->throttle.id	  = bswap_64(event->throttle.id);
 558	event->throttle.stream_id = bswap_64(event->throttle.stream_id);
 559
 560	if (sample_id_all)
 561		swap_sample_id_all(event, &event->throttle + 1);
 562}
 563
 564static u8 revbyte(u8 b)
 565{
 566	int rev = (b >> 4) | ((b & 0xf) << 4);
 567	rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 568	rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 569	return (u8) rev;
 570}
 571
 572/*
 573 * XXX this is hack in attempt to carry flags bitfield
 574 * through endian village. ABI says:
 575 *
 576 * Bit-fields are allocated from right to left (least to most significant)
 577 * on little-endian implementations and from left to right (most to least
 578 * significant) on big-endian implementations.
 579 *
 580 * The above seems to be byte specific, so we need to reverse each
 581 * byte of the bitfield. 'Internet' also says this might be implementation
 582 * specific and we probably need proper fix and carry perf_event_attr
 583 * bitfield flags in separate data file FEAT_ section. Thought this seems
 584 * to work for now.
 585 */
 586static void swap_bitfield(u8 *p, unsigned len)
 587{
 588	unsigned i;
 589
 590	for (i = 0; i < len; i++) {
 591		*p = revbyte(*p);
 592		p++;
 593	}
 594}
 595
 596/* exported for swapping attributes in file header */
 597void perf_event__attr_swap(struct perf_event_attr *attr)
 598{
 599	attr->type		= bswap_32(attr->type);
 600	attr->size		= bswap_32(attr->size);
 601
 602#define bswap_safe(f, n) 					\
 603	(attr->size > (offsetof(struct perf_event_attr, f) + 	\
 604		       sizeof(attr->f) * (n)))
 605#define bswap_field(f, sz) 			\
 606do { 						\
 607	if (bswap_safe(f, 0))			\
 608		attr->f = bswap_##sz(attr->f);	\
 609} while(0)
 610#define bswap_field_16(f) bswap_field(f, 16)
 611#define bswap_field_32(f) bswap_field(f, 32)
 612#define bswap_field_64(f) bswap_field(f, 64)
 613
 614	bswap_field_64(config);
 615	bswap_field_64(sample_period);
 616	bswap_field_64(sample_type);
 617	bswap_field_64(read_format);
 618	bswap_field_32(wakeup_events);
 619	bswap_field_32(bp_type);
 620	bswap_field_64(bp_addr);
 621	bswap_field_64(bp_len);
 622	bswap_field_64(branch_sample_type);
 623	bswap_field_64(sample_regs_user);
 624	bswap_field_32(sample_stack_user);
 625	bswap_field_32(aux_watermark);
 626	bswap_field_16(sample_max_stack);
 627
 628	/*
 629	 * After read_format are bitfields. Check read_format because
 630	 * we are unable to use offsetof on bitfield.
 631	 */
 632	if (bswap_safe(read_format, 1))
 633		swap_bitfield((u8 *) (&attr->read_format + 1),
 634			      sizeof(u64));
 635#undef bswap_field_64
 636#undef bswap_field_32
 637#undef bswap_field
 638#undef bswap_safe
 639}
 640
 641static void perf_event__hdr_attr_swap(union perf_event *event,
 642				      bool sample_id_all __maybe_unused)
 643{
 644	size_t size;
 645
 646	perf_event__attr_swap(&event->attr.attr);
 647
 648	size = event->header.size;
 649	size -= (void *)&event->attr.id - (void *)event;
 650	mem_bswap_64(event->attr.id, size);
 651}
 652
 653static void perf_event__event_update_swap(union perf_event *event,
 654					  bool sample_id_all __maybe_unused)
 655{
 656	event->event_update.type = bswap_64(event->event_update.type);
 657	event->event_update.id   = bswap_64(event->event_update.id);
 658}
 659
 660static void perf_event__event_type_swap(union perf_event *event,
 661					bool sample_id_all __maybe_unused)
 662{
 663	event->event_type.event_type.event_id =
 664		bswap_64(event->event_type.event_type.event_id);
 665}
 666
 667static void perf_event__tracing_data_swap(union perf_event *event,
 668					  bool sample_id_all __maybe_unused)
 669{
 670	event->tracing_data.size = bswap_32(event->tracing_data.size);
 671}
 672
 673static void perf_event__auxtrace_info_swap(union perf_event *event,
 674					   bool sample_id_all __maybe_unused)
 675{
 676	size_t size;
 677
 678	event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
 679
 680	size = event->header.size;
 681	size -= (void *)&event->auxtrace_info.priv - (void *)event;
 682	mem_bswap_64(event->auxtrace_info.priv, size);
 683}
 684
 685static void perf_event__auxtrace_swap(union perf_event *event,
 686				      bool sample_id_all __maybe_unused)
 687{
 688	event->auxtrace.size      = bswap_64(event->auxtrace.size);
 689	event->auxtrace.offset    = bswap_64(event->auxtrace.offset);
 690	event->auxtrace.reference = bswap_64(event->auxtrace.reference);
 691	event->auxtrace.idx       = bswap_32(event->auxtrace.idx);
 692	event->auxtrace.tid       = bswap_32(event->auxtrace.tid);
 693	event->auxtrace.cpu       = bswap_32(event->auxtrace.cpu);
 694}
 695
 696static void perf_event__auxtrace_error_swap(union perf_event *event,
 697					    bool sample_id_all __maybe_unused)
 698{
 699	event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
 700	event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
 701	event->auxtrace_error.cpu  = bswap_32(event->auxtrace_error.cpu);
 702	event->auxtrace_error.pid  = bswap_32(event->auxtrace_error.pid);
 703	event->auxtrace_error.tid  = bswap_32(event->auxtrace_error.tid);
 704	event->auxtrace_error.ip   = bswap_64(event->auxtrace_error.ip);
 705}
 706
 707static void perf_event__thread_map_swap(union perf_event *event,
 708					bool sample_id_all __maybe_unused)
 709{
 710	unsigned i;
 711
 712	event->thread_map.nr = bswap_64(event->thread_map.nr);
 713
 714	for (i = 0; i < event->thread_map.nr; i++)
 715		event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
 716}
 717
 718static void perf_event__cpu_map_swap(union perf_event *event,
 719				     bool sample_id_all __maybe_unused)
 720{
 721	struct cpu_map_data *data = &event->cpu_map.data;
 722	struct cpu_map_entries *cpus;
 723	struct cpu_map_mask *mask;
 724	unsigned i;
 725
 726	data->type = bswap_64(data->type);
 727
 728	switch (data->type) {
 729	case PERF_CPU_MAP__CPUS:
 730		cpus = (struct cpu_map_entries *)data->data;
 731
 732		cpus->nr = bswap_16(cpus->nr);
 733
 734		for (i = 0; i < cpus->nr; i++)
 735			cpus->cpu[i] = bswap_16(cpus->cpu[i]);
 736		break;
 737	case PERF_CPU_MAP__MASK:
 738		mask = (struct cpu_map_mask *) data->data;
 739
 740		mask->nr = bswap_16(mask->nr);
 741		mask->long_size = bswap_16(mask->long_size);
 742
 743		switch (mask->long_size) {
 744		case 4: mem_bswap_32(&mask->mask, mask->nr); break;
 745		case 8: mem_bswap_64(&mask->mask, mask->nr); break;
 746		default:
 747			pr_err("cpu_map swap: unsupported long size\n");
 748		}
 749	default:
 750		break;
 751	}
 752}
 753
 754static void perf_event__stat_config_swap(union perf_event *event,
 755					 bool sample_id_all __maybe_unused)
 756{
 757	u64 size;
 758
 759	size  = event->stat_config.nr * sizeof(event->stat_config.data[0]);
 760	size += 1; /* nr item itself */
 761	mem_bswap_64(&event->stat_config.nr, size);
 762}
 763
 764static void perf_event__stat_swap(union perf_event *event,
 765				  bool sample_id_all __maybe_unused)
 766{
 767	event->stat.id     = bswap_64(event->stat.id);
 768	event->stat.thread = bswap_32(event->stat.thread);
 769	event->stat.cpu    = bswap_32(event->stat.cpu);
 770	event->stat.val    = bswap_64(event->stat.val);
 771	event->stat.ena    = bswap_64(event->stat.ena);
 772	event->stat.run    = bswap_64(event->stat.run);
 773}
 774
 775static void perf_event__stat_round_swap(union perf_event *event,
 776					bool sample_id_all __maybe_unused)
 777{
 778	event->stat_round.type = bswap_64(event->stat_round.type);
 779	event->stat_round.time = bswap_64(event->stat_round.time);
 780}
 781
 782typedef void (*perf_event__swap_op)(union perf_event *event,
 783				    bool sample_id_all);
 784
 785static perf_event__swap_op perf_event__swap_ops[] = {
 786	[PERF_RECORD_MMAP]		  = perf_event__mmap_swap,
 787	[PERF_RECORD_MMAP2]		  = perf_event__mmap2_swap,
 788	[PERF_RECORD_COMM]		  = perf_event__comm_swap,
 789	[PERF_RECORD_FORK]		  = perf_event__task_swap,
 790	[PERF_RECORD_EXIT]		  = perf_event__task_swap,
 791	[PERF_RECORD_LOST]		  = perf_event__all64_swap,
 792	[PERF_RECORD_READ]		  = perf_event__read_swap,
 793	[PERF_RECORD_THROTTLE]		  = perf_event__throttle_swap,
 794	[PERF_RECORD_UNTHROTTLE]	  = perf_event__throttle_swap,
 795	[PERF_RECORD_SAMPLE]		  = perf_event__all64_swap,
 796	[PERF_RECORD_AUX]		  = perf_event__aux_swap,
 797	[PERF_RECORD_ITRACE_START]	  = perf_event__itrace_start_swap,
 798	[PERF_RECORD_LOST_SAMPLES]	  = perf_event__all64_swap,
 799	[PERF_RECORD_SWITCH]		  = perf_event__switch_swap,
 800	[PERF_RECORD_SWITCH_CPU_WIDE]	  = perf_event__switch_swap,
 801	[PERF_RECORD_HEADER_ATTR]	  = perf_event__hdr_attr_swap,
 802	[PERF_RECORD_HEADER_EVENT_TYPE]	  = perf_event__event_type_swap,
 803	[PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
 804	[PERF_RECORD_HEADER_BUILD_ID]	  = NULL,
 805	[PERF_RECORD_ID_INDEX]		  = perf_event__all64_swap,
 806	[PERF_RECORD_AUXTRACE_INFO]	  = perf_event__auxtrace_info_swap,
 807	[PERF_RECORD_AUXTRACE]		  = perf_event__auxtrace_swap,
 808	[PERF_RECORD_AUXTRACE_ERROR]	  = perf_event__auxtrace_error_swap,
 809	[PERF_RECORD_THREAD_MAP]	  = perf_event__thread_map_swap,
 810	[PERF_RECORD_CPU_MAP]		  = perf_event__cpu_map_swap,
 811	[PERF_RECORD_STAT_CONFIG]	  = perf_event__stat_config_swap,
 812	[PERF_RECORD_STAT]		  = perf_event__stat_swap,
 813	[PERF_RECORD_STAT_ROUND]	  = perf_event__stat_round_swap,
 814	[PERF_RECORD_EVENT_UPDATE]	  = perf_event__event_update_swap,
 815	[PERF_RECORD_TIME_CONV]		  = perf_event__all64_swap,
 816	[PERF_RECORD_HEADER_MAX]	  = NULL,
 817};
 818
 819/*
 820 * When perf record finishes a pass on every buffers, it records this pseudo
 821 * event.
 822 * We record the max timestamp t found in the pass n.
 823 * Assuming these timestamps are monotonic across cpus, we know that if
 824 * a buffer still has events with timestamps below t, they will be all
 825 * available and then read in the pass n + 1.
 826 * Hence when we start to read the pass n + 2, we can safely flush every
 827 * events with timestamps below t.
 828 *
 829 *    ============ PASS n =================
 830 *       CPU 0         |   CPU 1
 831 *                     |
 832 *    cnt1 timestamps  |   cnt2 timestamps
 833 *          1          |         2
 834 *          2          |         3
 835 *          -          |         4  <--- max recorded
 836 *
 837 *    ============ PASS n + 1 ==============
 838 *       CPU 0         |   CPU 1
 839 *                     |
 840 *    cnt1 timestamps  |   cnt2 timestamps
 841 *          3          |         5
 842 *          4          |         6
 843 *          5          |         7 <---- max recorded
 844 *
 845 *      Flush every events below timestamp 4
 846 *
 847 *    ============ PASS n + 2 ==============
 848 *       CPU 0         |   CPU 1
 849 *                     |
 850 *    cnt1 timestamps  |   cnt2 timestamps
 851 *          6          |         8
 852 *          7          |         9
 853 *          -          |         10
 854 *
 855 *      Flush every events below timestamp 7
 856 *      etc...
 857 */
 858static int process_finished_round(struct perf_tool *tool __maybe_unused,
 859				  union perf_event *event __maybe_unused,
 860				  struct ordered_events *oe)
 861{
 862	if (dump_trace)
 863		fprintf(stdout, "\n");
 864	return ordered_events__flush(oe, OE_FLUSH__ROUND);
 865}
 866
 867int perf_session__queue_event(struct perf_session *s, union perf_event *event,
 868			      u64 timestamp, u64 file_offset)
 869{
 870	return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset);
 871}
 872
 873static void callchain__lbr_callstack_printf(struct perf_sample *sample)
 874{
 875	struct ip_callchain *callchain = sample->callchain;
 876	struct branch_stack *lbr_stack = sample->branch_stack;
 877	u64 kernel_callchain_nr = callchain->nr;
 878	unsigned int i;
 879
 880	for (i = 0; i < kernel_callchain_nr; i++) {
 881		if (callchain->ips[i] == PERF_CONTEXT_USER)
 882			break;
 883	}
 884
 885	if ((i != kernel_callchain_nr) && lbr_stack->nr) {
 886		u64 total_nr;
 887		/*
 888		 * LBR callstack can only get user call chain,
 889		 * i is kernel call chain number,
 890		 * 1 is PERF_CONTEXT_USER.
 891		 *
 892		 * The user call chain is stored in LBR registers.
 893		 * LBR are pair registers. The caller is stored
 894		 * in "from" register, while the callee is stored
 895		 * in "to" register.
 896		 * For example, there is a call stack
 897		 * "A"->"B"->"C"->"D".
 898		 * The LBR registers will recorde like
 899		 * "C"->"D", "B"->"C", "A"->"B".
 900		 * So only the first "to" register and all "from"
 901		 * registers are needed to construct the whole stack.
 902		 */
 903		total_nr = i + 1 + lbr_stack->nr + 1;
 904		kernel_callchain_nr = i + 1;
 905
 906		printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
 907
 908		for (i = 0; i < kernel_callchain_nr; i++)
 909			printf("..... %2d: %016" PRIx64 "\n",
 910			       i, callchain->ips[i]);
 911
 912		printf("..... %2d: %016" PRIx64 "\n",
 913		       (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
 914		for (i = 0; i < lbr_stack->nr; i++)
 915			printf("..... %2d: %016" PRIx64 "\n",
 916			       (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
 917	}
 918}
 919
 920static void callchain__printf(struct perf_evsel *evsel,
 921			      struct perf_sample *sample)
 922{
 923	unsigned int i;
 924	struct ip_callchain *callchain = sample->callchain;
 925
 926	if (perf_evsel__has_branch_callstack(evsel))
 927		callchain__lbr_callstack_printf(sample);
 928
 929	printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
 930
 931	for (i = 0; i < callchain->nr; i++)
 932		printf("..... %2d: %016" PRIx64 "\n",
 933		       i, callchain->ips[i]);
 934}
 935
 936static void branch_stack__printf(struct perf_sample *sample)
 937{
 938	uint64_t i;
 939
 940	printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
 941
 942	for (i = 0; i < sample->branch_stack->nr; i++) {
 943		struct branch_entry *e = &sample->branch_stack->entries[i];
 944
 945		printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
 946			i, e->from, e->to,
 947			(unsigned short)e->flags.cycles,
 948			e->flags.mispred ? "M" : " ",
 949			e->flags.predicted ? "P" : " ",
 950			e->flags.abort ? "A" : " ",
 951			e->flags.in_tx ? "T" : " ",
 952			(unsigned)e->flags.reserved);
 953	}
 954}
 955
 956static void regs_dump__printf(u64 mask, u64 *regs)
 957{
 958	unsigned rid, i = 0;
 959
 960	for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
 961		u64 val = regs[i++];
 962
 963		printf(".... %-5s 0x%" PRIx64 "\n",
 964		       perf_reg_name(rid), val);
 965	}
 966}
 967
 968static const char *regs_abi[] = {
 969	[PERF_SAMPLE_REGS_ABI_NONE] = "none",
 970	[PERF_SAMPLE_REGS_ABI_32] = "32-bit",
 971	[PERF_SAMPLE_REGS_ABI_64] = "64-bit",
 972};
 973
 974static inline const char *regs_dump_abi(struct regs_dump *d)
 975{
 976	if (d->abi > PERF_SAMPLE_REGS_ABI_64)
 977		return "unknown";
 978
 979	return regs_abi[d->abi];
 980}
 981
 982static void regs__printf(const char *type, struct regs_dump *regs)
 983{
 984	u64 mask = regs->mask;
 985
 986	printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
 987	       type,
 988	       mask,
 989	       regs_dump_abi(regs));
 990
 991	regs_dump__printf(mask, regs->regs);
 992}
 993
 994static void regs_user__printf(struct perf_sample *sample)
 995{
 996	struct regs_dump *user_regs = &sample->user_regs;
 997
 998	if (user_regs->regs)
 999		regs__printf("user", user_regs);
1000}
1001
1002static void regs_intr__printf(struct perf_sample *sample)
1003{
1004	struct regs_dump *intr_regs = &sample->intr_regs;
1005
1006	if (intr_regs->regs)
1007		regs__printf("intr", intr_regs);
1008}
1009
1010static void stack_user__printf(struct stack_dump *dump)
1011{
1012	printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1013	       dump->size, dump->offset);
1014}
1015
1016static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
1017				       union perf_event *event,
1018				       struct perf_sample *sample)
1019{
1020	u64 sample_type = __perf_evlist__combined_sample_type(evlist);
1021
1022	if (event->header.type != PERF_RECORD_SAMPLE &&
1023	    !perf_evlist__sample_id_all(evlist)) {
1024		fputs("-1 -1 ", stdout);
1025		return;
1026	}
1027
1028	if ((sample_type & PERF_SAMPLE_CPU))
1029		printf("%u ", sample->cpu);
1030
1031	if (sample_type & PERF_SAMPLE_TIME)
1032		printf("%" PRIu64 " ", sample->time);
1033}
1034
1035static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1036{
1037	printf("... sample_read:\n");
1038
1039	if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1040		printf("...... time enabled %016" PRIx64 "\n",
1041		       sample->read.time_enabled);
1042
1043	if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1044		printf("...... time running %016" PRIx64 "\n",
1045		       sample->read.time_running);
1046
1047	if (read_format & PERF_FORMAT_GROUP) {
1048		u64 i;
1049
1050		printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1051
1052		for (i = 0; i < sample->read.group.nr; i++) {
1053			struct sample_read_value *value;
1054
1055			value = &sample->read.group.values[i];
1056			printf("..... id %016" PRIx64
1057			       ", value %016" PRIx64 "\n",
1058			       value->id, value->value);
1059		}
1060	} else
1061		printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1062			sample->read.one.id, sample->read.one.value);
1063}
1064
1065static void dump_event(struct perf_evlist *evlist, union perf_event *event,
1066		       u64 file_offset, struct perf_sample *sample)
1067{
1068	if (!dump_trace)
1069		return;
1070
1071	printf("\n%#" PRIx64 " [%#x]: event: %d\n",
1072	       file_offset, event->header.size, event->header.type);
1073
1074	trace_event(event);
1075
1076	if (sample)
1077		perf_evlist__print_tstamp(evlist, event, sample);
1078
1079	printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1080	       event->header.size, perf_event__name(event->header.type));
1081}
1082
1083static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
1084			struct perf_sample *sample)
1085{
1086	u64 sample_type;
1087
1088	if (!dump_trace)
1089		return;
1090
1091	printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1092	       event->header.misc, sample->pid, sample->tid, sample->ip,
1093	       sample->period, sample->addr);
1094
1095	sample_type = evsel->attr.sample_type;
1096
1097	if (sample_type & PERF_SAMPLE_CALLCHAIN)
1098		callchain__printf(evsel, sample);
1099
1100	if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel))
1101		branch_stack__printf(sample);
1102
1103	if (sample_type & PERF_SAMPLE_REGS_USER)
1104		regs_user__printf(sample);
1105
1106	if (sample_type & PERF_SAMPLE_REGS_INTR)
1107		regs_intr__printf(sample);
1108
1109	if (sample_type & PERF_SAMPLE_STACK_USER)
1110		stack_user__printf(&sample->user_stack);
1111
1112	if (sample_type & PERF_SAMPLE_WEIGHT)
1113		printf("... weight: %" PRIu64 "\n", sample->weight);
1114
1115	if (sample_type & PERF_SAMPLE_DATA_SRC)
1116		printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1117
1118	if (sample_type & PERF_SAMPLE_PHYS_ADDR)
1119		printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
1120
1121	if (sample_type & PERF_SAMPLE_TRANSACTION)
1122		printf("... transaction: %" PRIx64 "\n", sample->transaction);
1123
1124	if (sample_type & PERF_SAMPLE_READ)
1125		sample_read__printf(sample, evsel->attr.read_format);
1126}
1127
1128static void dump_read(struct perf_evsel *evsel, union perf_event *event)
1129{
1130	struct read_event *read_event = &event->read;
1131	u64 read_format;
1132
1133	if (!dump_trace)
1134		return;
1135
1136	printf(": %d %d %s %" PRIu64 "\n", event->read.pid, event->read.tid,
1137	       evsel ? perf_evsel__name(evsel) : "FAIL",
1138	       event->read.value);
1139
1140	read_format = evsel->attr.read_format;
1141
1142	if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1143		printf("... time enabled : %" PRIu64 "\n", read_event->time_enabled);
1144
1145	if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1146		printf("... time running : %" PRIu64 "\n", read_event->time_running);
1147
1148	if (read_format & PERF_FORMAT_ID)
1149		printf("... id           : %" PRIu64 "\n", read_event->id);
1150}
1151
1152static struct machine *machines__find_for_cpumode(struct machines *machines,
1153					       union perf_event *event,
1154					       struct perf_sample *sample)
1155{
1156	struct machine *machine;
1157
1158	if (perf_guest &&
1159	    ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1160	     (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1161		u32 pid;
1162
1163		if (event->header.type == PERF_RECORD_MMAP
1164		    || event->header.type == PERF_RECORD_MMAP2)
1165			pid = event->mmap.pid;
1166		else
1167			pid = sample->pid;
1168
1169		machine = machines__find(machines, pid);
1170		if (!machine)
1171			machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
1172		return machine;
1173	}
1174
1175	return &machines->host;
1176}
1177
1178static int deliver_sample_value(struct perf_evlist *evlist,
1179				struct perf_tool *tool,
1180				union perf_event *event,
1181				struct perf_sample *sample,
1182				struct sample_read_value *v,
1183				struct machine *machine)
1184{
1185	struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1186
1187	if (sid) {
1188		sample->id     = v->id;
1189		sample->period = v->value - sid->period;
1190		sid->period    = v->value;
1191	}
1192
1193	if (!sid || sid->evsel == NULL) {
1194		++evlist->stats.nr_unknown_id;
1195		return 0;
1196	}
1197
1198	return tool->sample(tool, event, sample, sid->evsel, machine);
1199}
1200
1201static int deliver_sample_group(struct perf_evlist *evlist,
1202				struct perf_tool *tool,
1203				union  perf_event *event,
1204				struct perf_sample *sample,
1205				struct machine *machine)
1206{
1207	int ret = -EINVAL;
1208	u64 i;
1209
1210	for (i = 0; i < sample->read.group.nr; i++) {
1211		ret = deliver_sample_value(evlist, tool, event, sample,
1212					   &sample->read.group.values[i],
1213					   machine);
1214		if (ret)
1215			break;
1216	}
1217
1218	return ret;
1219}
1220
1221static int
1222 perf_evlist__deliver_sample(struct perf_evlist *evlist,
1223			     struct perf_tool *tool,
1224			     union  perf_event *event,
1225			     struct perf_sample *sample,
1226			     struct perf_evsel *evsel,
1227			     struct machine *machine)
1228{
1229	/* We know evsel != NULL. */
1230	u64 sample_type = evsel->attr.sample_type;
1231	u64 read_format = evsel->attr.read_format;
1232
1233	/* Standard sample delivery. */
1234	if (!(sample_type & PERF_SAMPLE_READ))
1235		return tool->sample(tool, event, sample, evsel, machine);
1236
1237	/* For PERF_SAMPLE_READ we have either single or group mode. */
1238	if (read_format & PERF_FORMAT_GROUP)
1239		return deliver_sample_group(evlist, tool, event, sample,
1240					    machine);
1241	else
1242		return deliver_sample_value(evlist, tool, event, sample,
1243					    &sample->read.one, machine);
1244}
1245
1246static int machines__deliver_event(struct machines *machines,
1247				   struct perf_evlist *evlist,
1248				   union perf_event *event,
1249				   struct perf_sample *sample,
1250				   struct perf_tool *tool, u64 file_offset)
1251{
1252	struct perf_evsel *evsel;
1253	struct machine *machine;
1254
1255	dump_event(evlist, event, file_offset, sample);
1256
1257	evsel = perf_evlist__id2evsel(evlist, sample->id);
1258
1259	machine = machines__find_for_cpumode(machines, event, sample);
1260
1261	switch (event->header.type) {
1262	case PERF_RECORD_SAMPLE:
1263		if (evsel == NULL) {
1264			++evlist->stats.nr_unknown_id;
1265			return 0;
1266		}
1267		dump_sample(evsel, event, sample);
1268		if (machine == NULL) {
1269			++evlist->stats.nr_unprocessable_samples;
1270			return 0;
1271		}
1272		return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1273	case PERF_RECORD_MMAP:
1274		return tool->mmap(tool, event, sample, machine);
1275	case PERF_RECORD_MMAP2:
1276		if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1277			++evlist->stats.nr_proc_map_timeout;
1278		return tool->mmap2(tool, event, sample, machine);
1279	case PERF_RECORD_COMM:
1280		return tool->comm(tool, event, sample, machine);
1281	case PERF_RECORD_NAMESPACES:
1282		return tool->namespaces(tool, event, sample, machine);
1283	case PERF_RECORD_FORK:
1284		return tool->fork(tool, event, sample, machine);
1285	case PERF_RECORD_EXIT:
1286		return tool->exit(tool, event, sample, machine);
1287	case PERF_RECORD_LOST:
1288		if (tool->lost == perf_event__process_lost)
1289			evlist->stats.total_lost += event->lost.lost;
1290		return tool->lost(tool, event, sample, machine);
1291	case PERF_RECORD_LOST_SAMPLES:
1292		if (tool->lost_samples == perf_event__process_lost_samples)
1293			evlist->stats.total_lost_samples += event->lost_samples.lost;
1294		return tool->lost_samples(tool, event, sample, machine);
1295	case PERF_RECORD_READ:
1296		dump_read(evsel, event);
1297		return tool->read(tool, event, sample, evsel, machine);
1298	case PERF_RECORD_THROTTLE:
1299		return tool->throttle(tool, event, sample, machine);
1300	case PERF_RECORD_UNTHROTTLE:
1301		return tool->unthrottle(tool, event, sample, machine);
1302	case PERF_RECORD_AUX:
1303		if (tool->aux == perf_event__process_aux) {
1304			if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1305				evlist->stats.total_aux_lost += 1;
1306			if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1307				evlist->stats.total_aux_partial += 1;
1308		}
1309		return tool->aux(tool, event, sample, machine);
1310	case PERF_RECORD_ITRACE_START:
1311		return tool->itrace_start(tool, event, sample, machine);
1312	case PERF_RECORD_SWITCH:
1313	case PERF_RECORD_SWITCH_CPU_WIDE:
1314		return tool->context_switch(tool, event, sample, machine);
1315	default:
1316		++evlist->stats.nr_unknown_events;
1317		return -1;
1318	}
1319}
1320
1321static int perf_session__deliver_event(struct perf_session *session,
1322				       union perf_event *event,
 
1323				       struct perf_tool *tool,
1324				       u64 file_offset)
1325{
1326	struct perf_sample sample;
1327	int ret;
1328
1329	ret = perf_evlist__parse_sample(session->evlist, event, &sample);
1330	if (ret) {
1331		pr_err("Can't parse sample, err = %d\n", ret);
1332		return ret;
1333	}
1334
1335	ret = auxtrace__process_event(session, event, &sample, tool);
1336	if (ret < 0)
1337		return ret;
1338	if (ret > 0)
1339		return 0;
1340
1341	return machines__deliver_event(&session->machines, session->evlist,
1342				       event, &sample, tool, file_offset);
1343}
1344
1345static s64 perf_session__process_user_event(struct perf_session *session,
1346					    union perf_event *event,
1347					    u64 file_offset)
1348{
1349	struct ordered_events *oe = &session->ordered_events;
1350	struct perf_tool *tool = session->tool;
1351	struct perf_sample sample = { .time = 0, };
1352	int fd = perf_data__fd(session->data);
1353	int err;
1354
1355	dump_event(session->evlist, event, file_offset, &sample);
1356
1357	/* These events are processed right away */
1358	switch (event->header.type) {
1359	case PERF_RECORD_HEADER_ATTR:
1360		err = tool->attr(tool, event, &session->evlist);
1361		if (err == 0) {
1362			perf_session__set_id_hdr_size(session);
1363			perf_session__set_comm_exec(session);
1364		}
1365		return err;
1366	case PERF_RECORD_EVENT_UPDATE:
1367		return tool->event_update(tool, event, &session->evlist);
1368	case PERF_RECORD_HEADER_EVENT_TYPE:
1369		/*
1370		 * Depreceated, but we need to handle it for sake
1371		 * of old data files create in pipe mode.
1372		 */
1373		return 0;
1374	case PERF_RECORD_HEADER_TRACING_DATA:
1375		/* setup for reading amidst mmap */
1376		lseek(fd, file_offset, SEEK_SET);
1377		return tool->tracing_data(tool, event, session);
1378	case PERF_RECORD_HEADER_BUILD_ID:
1379		return tool->build_id(tool, event, session);
1380	case PERF_RECORD_FINISHED_ROUND:
1381		return tool->finished_round(tool, event, oe);
1382	case PERF_RECORD_ID_INDEX:
1383		return tool->id_index(tool, event, session);
1384	case PERF_RECORD_AUXTRACE_INFO:
1385		return tool->auxtrace_info(tool, event, session);
1386	case PERF_RECORD_AUXTRACE:
1387		/* setup for reading amidst mmap */
1388		lseek(fd, file_offset + event->header.size, SEEK_SET);
1389		return tool->auxtrace(tool, event, session);
1390	case PERF_RECORD_AUXTRACE_ERROR:
1391		perf_session__auxtrace_error_inc(session, event);
1392		return tool->auxtrace_error(tool, event, session);
1393	case PERF_RECORD_THREAD_MAP:
1394		return tool->thread_map(tool, event, session);
1395	case PERF_RECORD_CPU_MAP:
1396		return tool->cpu_map(tool, event, session);
1397	case PERF_RECORD_STAT_CONFIG:
1398		return tool->stat_config(tool, event, session);
1399	case PERF_RECORD_STAT:
1400		return tool->stat(tool, event, session);
1401	case PERF_RECORD_STAT_ROUND:
1402		return tool->stat_round(tool, event, session);
1403	case PERF_RECORD_TIME_CONV:
1404		session->time_conv = event->time_conv;
1405		return tool->time_conv(tool, event, session);
1406	case PERF_RECORD_HEADER_FEATURE:
1407		return tool->feature(tool, event, session);
1408	default:
1409		return -EINVAL;
1410	}
1411}
1412
1413int perf_session__deliver_synth_event(struct perf_session *session,
1414				      union perf_event *event,
1415				      struct perf_sample *sample)
1416{
1417	struct perf_evlist *evlist = session->evlist;
1418	struct perf_tool *tool = session->tool;
1419
1420	events_stats__inc(&evlist->stats, event->header.type);
1421
1422	if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1423		return perf_session__process_user_event(session, event, 0);
1424
1425	return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1426}
1427
1428static void event_swap(union perf_event *event, bool sample_id_all)
1429{
1430	perf_event__swap_op swap;
1431
1432	swap = perf_event__swap_ops[event->header.type];
1433	if (swap)
1434		swap(event, sample_id_all);
1435}
1436
1437int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1438			     void *buf, size_t buf_sz,
1439			     union perf_event **event_ptr,
1440			     struct perf_sample *sample)
1441{
1442	union perf_event *event;
1443	size_t hdr_sz, rest;
1444	int fd;
1445
1446	if (session->one_mmap && !session->header.needs_swap) {
1447		event = file_offset - session->one_mmap_offset +
1448			session->one_mmap_addr;
1449		goto out_parse_sample;
1450	}
1451
1452	if (perf_data__is_pipe(session->data))
1453		return -1;
1454
1455	fd = perf_data__fd(session->data);
1456	hdr_sz = sizeof(struct perf_event_header);
1457
1458	if (buf_sz < hdr_sz)
1459		return -1;
1460
1461	if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1462	    readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1463		return -1;
1464
1465	event = (union perf_event *)buf;
1466
1467	if (session->header.needs_swap)
1468		perf_event_header__bswap(&event->header);
1469
1470	if (event->header.size < hdr_sz || event->header.size > buf_sz)
1471		return -1;
1472
1473	rest = event->header.size - hdr_sz;
1474
1475	if (readn(fd, buf, rest) != (ssize_t)rest)
1476		return -1;
1477
1478	if (session->header.needs_swap)
1479		event_swap(event, perf_evlist__sample_id_all(session->evlist));
1480
1481out_parse_sample:
1482
1483	if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1484	    perf_evlist__parse_sample(session->evlist, event, sample))
1485		return -1;
1486
1487	*event_ptr = event;
1488
1489	return 0;
1490}
1491
1492static s64 perf_session__process_event(struct perf_session *session,
1493				       union perf_event *event, u64 file_offset)
1494{
1495	struct perf_evlist *evlist = session->evlist;
1496	struct perf_tool *tool = session->tool;
 
1497	int ret;
1498
1499	if (session->header.needs_swap)
1500		event_swap(event, perf_evlist__sample_id_all(evlist));
1501
1502	if (event->header.type >= PERF_RECORD_HEADER_MAX)
1503		return -EINVAL;
1504
1505	events_stats__inc(&evlist->stats, event->header.type);
1506
1507	if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1508		return perf_session__process_user_event(session, event, file_offset);
1509
1510	if (tool->ordered_events) {
1511		u64 timestamp = -1ULL;
1512
1513		ret = perf_evlist__parse_sample_timestamp(evlist, event, &timestamp);
1514		if (ret && ret != -1)
1515			return ret;
1516
1517		ret = perf_session__queue_event(session, event, timestamp, file_offset);
 
1518		if (ret != -ETIME)
1519			return ret;
1520	}
1521
1522	return perf_session__deliver_event(session, event, tool, file_offset);
 
1523}
1524
1525void perf_event_header__bswap(struct perf_event_header *hdr)
1526{
1527	hdr->type = bswap_32(hdr->type);
1528	hdr->misc = bswap_16(hdr->misc);
1529	hdr->size = bswap_16(hdr->size);
1530}
1531
1532struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1533{
1534	return machine__findnew_thread(&session->machines.host, -1, pid);
1535}
1536
1537int perf_session__register_idle_thread(struct perf_session *session)
1538{
1539	struct thread *thread;
1540	int err = 0;
1541
1542	thread = machine__findnew_thread(&session->machines.host, 0, 0);
1543	if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1544		pr_err("problem inserting idle task.\n");
1545		err = -1;
1546	}
1547
1548	if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) {
1549		pr_err("problem inserting idle task.\n");
1550		err = -1;
1551	}
1552
1553	/* machine__findnew_thread() got the thread, so put it */
1554	thread__put(thread);
1555	return err;
1556}
1557
1558static void
1559perf_session__warn_order(const struct perf_session *session)
1560{
1561	const struct ordered_events *oe = &session->ordered_events;
1562	struct perf_evsel *evsel;
1563	bool should_warn = true;
1564
1565	evlist__for_each_entry(session->evlist, evsel) {
1566		if (evsel->attr.write_backward)
1567			should_warn = false;
1568	}
1569
1570	if (!should_warn)
1571		return;
1572	if (oe->nr_unordered_events != 0)
1573		ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1574}
1575
1576static void perf_session__warn_about_errors(const struct perf_session *session)
1577{
1578	const struct events_stats *stats = &session->evlist->stats;
1579
1580	if (session->tool->lost == perf_event__process_lost &&
1581	    stats->nr_events[PERF_RECORD_LOST] != 0) {
1582		ui__warning("Processed %d events and lost %d chunks!\n\n"
1583			    "Check IO/CPU overload!\n\n",
1584			    stats->nr_events[0],
1585			    stats->nr_events[PERF_RECORD_LOST]);
1586	}
1587
1588	if (session->tool->lost_samples == perf_event__process_lost_samples) {
1589		double drop_rate;
1590
1591		drop_rate = (double)stats->total_lost_samples /
1592			    (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1593		if (drop_rate > 0.05) {
1594			ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n",
1595				    stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1596				    drop_rate * 100.0);
1597		}
1598	}
1599
1600	if (session->tool->aux == perf_event__process_aux &&
1601	    stats->total_aux_lost != 0) {
1602		ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1603			    stats->total_aux_lost,
1604			    stats->nr_events[PERF_RECORD_AUX]);
1605	}
1606
1607	if (session->tool->aux == perf_event__process_aux &&
1608	    stats->total_aux_partial != 0) {
1609		bool vmm_exclusive = false;
1610
1611		(void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1612		                       &vmm_exclusive);
1613
1614		ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1615		            "Are you running a KVM guest in the background?%s\n\n",
1616			    stats->total_aux_partial,
1617			    stats->nr_events[PERF_RECORD_AUX],
1618			    vmm_exclusive ?
1619			    "\nReloading kvm_intel module with vmm_exclusive=0\n"
1620			    "will reduce the gaps to only guest's timeslices." :
1621			    "");
1622	}
1623
1624	if (stats->nr_unknown_events != 0) {
1625		ui__warning("Found %u unknown events!\n\n"
1626			    "Is this an older tool processing a perf.data "
1627			    "file generated by a more recent tool?\n\n"
1628			    "If that is not the case, consider "
1629			    "reporting to linux-kernel@vger.kernel.org.\n\n",
1630			    stats->nr_unknown_events);
1631	}
1632
1633	if (stats->nr_unknown_id != 0) {
1634		ui__warning("%u samples with id not present in the header\n",
1635			    stats->nr_unknown_id);
1636	}
1637
1638	if (stats->nr_invalid_chains != 0) {
1639		ui__warning("Found invalid callchains!\n\n"
1640			    "%u out of %u events were discarded for this reason.\n\n"
1641			    "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1642			    stats->nr_invalid_chains,
1643			    stats->nr_events[PERF_RECORD_SAMPLE]);
1644	}
1645
1646	if (stats->nr_unprocessable_samples != 0) {
1647		ui__warning("%u unprocessable samples recorded.\n"
1648			    "Do you have a KVM guest running and not using 'perf kvm'?\n",
1649			    stats->nr_unprocessable_samples);
1650	}
1651
1652	perf_session__warn_order(session);
1653
1654	events_stats__auxtrace_error_warn(stats);
1655
1656	if (stats->nr_proc_map_timeout != 0) {
1657		ui__warning("%d map information files for pre-existing threads were\n"
1658			    "not processed, if there are samples for addresses they\n"
1659			    "will not be resolved, you may find out which are these\n"
1660			    "threads by running with -v and redirecting the output\n"
1661			    "to a file.\n"
1662			    "The time limit to process proc map is too short?\n"
1663			    "Increase it by --proc-map-timeout\n",
1664			    stats->nr_proc_map_timeout);
1665	}
1666}
1667
1668static int perf_session__flush_thread_stack(struct thread *thread,
1669					    void *p __maybe_unused)
1670{
1671	return thread_stack__flush(thread);
1672}
1673
1674static int perf_session__flush_thread_stacks(struct perf_session *session)
1675{
1676	return machines__for_each_thread(&session->machines,
1677					 perf_session__flush_thread_stack,
1678					 NULL);
1679}
1680
1681volatile int session_done;
1682
1683static int __perf_session__process_pipe_events(struct perf_session *session)
1684{
1685	struct ordered_events *oe = &session->ordered_events;
1686	struct perf_tool *tool = session->tool;
1687	int fd = perf_data__fd(session->data);
1688	union perf_event *event;
1689	uint32_t size, cur_size = 0;
1690	void *buf = NULL;
1691	s64 skip = 0;
1692	u64 head;
1693	ssize_t err;
1694	void *p;
1695
1696	perf_tool__fill_defaults(tool);
1697
1698	head = 0;
1699	cur_size = sizeof(union perf_event);
1700
1701	buf = malloc(cur_size);
1702	if (!buf)
1703		return -errno;
1704	ordered_events__set_copy_on_queue(oe, true);
1705more:
1706	event = buf;
1707	err = readn(fd, event, sizeof(struct perf_event_header));
1708	if (err <= 0) {
1709		if (err == 0)
1710			goto done;
1711
1712		pr_err("failed to read event header\n");
1713		goto out_err;
1714	}
1715
1716	if (session->header.needs_swap)
1717		perf_event_header__bswap(&event->header);
1718
1719	size = event->header.size;
1720	if (size < sizeof(struct perf_event_header)) {
1721		pr_err("bad event header size\n");
1722		goto out_err;
1723	}
1724
1725	if (size > cur_size) {
1726		void *new = realloc(buf, size);
1727		if (!new) {
1728			pr_err("failed to allocate memory to read event\n");
1729			goto out_err;
1730		}
1731		buf = new;
1732		cur_size = size;
1733		event = buf;
1734	}
1735	p = event;
1736	p += sizeof(struct perf_event_header);
1737
1738	if (size - sizeof(struct perf_event_header)) {
1739		err = readn(fd, p, size - sizeof(struct perf_event_header));
1740		if (err <= 0) {
1741			if (err == 0) {
1742				pr_err("unexpected end of event stream\n");
1743				goto done;
1744			}
1745
1746			pr_err("failed to read event data\n");
1747			goto out_err;
1748		}
1749	}
1750
1751	if ((skip = perf_session__process_event(session, event, head)) < 0) {
1752		pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1753		       head, event->header.size, event->header.type);
1754		err = -EINVAL;
1755		goto out_err;
1756	}
1757
1758	head += size;
1759
1760	if (skip > 0)
1761		head += skip;
1762
1763	if (!session_done())
1764		goto more;
1765done:
1766	/* do the final flush for ordered samples */
1767	err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1768	if (err)
1769		goto out_err;
1770	err = auxtrace__flush_events(session, tool);
1771	if (err)
1772		goto out_err;
1773	err = perf_session__flush_thread_stacks(session);
1774out_err:
1775	free(buf);
1776	if (!tool->no_warn)
1777		perf_session__warn_about_errors(session);
1778	ordered_events__free(&session->ordered_events);
1779	auxtrace__free_events(session);
1780	return err;
1781}
1782
1783static union perf_event *
1784fetch_mmaped_event(struct perf_session *session,
1785		   u64 head, size_t mmap_size, char *buf)
1786{
1787	union perf_event *event;
1788
1789	/*
1790	 * Ensure we have enough space remaining to read
1791	 * the size of the event in the headers.
1792	 */
1793	if (head + sizeof(event->header) > mmap_size)
1794		return NULL;
1795
1796	event = (union perf_event *)(buf + head);
1797
1798	if (session->header.needs_swap)
1799		perf_event_header__bswap(&event->header);
1800
1801	if (head + event->header.size > mmap_size) {
1802		/* We're not fetching the event so swap back again */
1803		if (session->header.needs_swap)
1804			perf_event_header__bswap(&event->header);
1805		return NULL;
1806	}
1807
1808	return event;
1809}
1810
1811/*
1812 * On 64bit we can mmap the data file in one go. No need for tiny mmap
1813 * slices. On 32bit we use 32MB.
1814 */
1815#if BITS_PER_LONG == 64
1816#define MMAP_SIZE ULLONG_MAX
1817#define NUM_MMAPS 1
1818#else
1819#define MMAP_SIZE (32 * 1024 * 1024ULL)
1820#define NUM_MMAPS 128
1821#endif
1822
1823static int __perf_session__process_events(struct perf_session *session,
1824					  u64 data_offset, u64 data_size,
1825					  u64 file_size)
1826{
1827	struct ordered_events *oe = &session->ordered_events;
1828	struct perf_tool *tool = session->tool;
1829	int fd = perf_data__fd(session->data);
1830	u64 head, page_offset, file_offset, file_pos, size;
1831	int err, mmap_prot, mmap_flags, map_idx = 0;
1832	size_t	mmap_size;
1833	char *buf, *mmaps[NUM_MMAPS];
1834	union perf_event *event;
1835	struct ui_progress prog;
1836	s64 skip;
1837
1838	perf_tool__fill_defaults(tool);
1839
1840	page_offset = page_size * (data_offset / page_size);
1841	file_offset = page_offset;
1842	head = data_offset - page_offset;
1843
1844	if (data_size == 0)
1845		goto out;
1846
1847	if (data_offset + data_size < file_size)
1848		file_size = data_offset + data_size;
1849
1850	ui_progress__init_size(&prog, file_size, "Processing events...");
1851
1852	mmap_size = MMAP_SIZE;
1853	if (mmap_size > file_size) {
1854		mmap_size = file_size;
1855		session->one_mmap = true;
1856	}
1857
1858	memset(mmaps, 0, sizeof(mmaps));
1859
1860	mmap_prot  = PROT_READ;
1861	mmap_flags = MAP_SHARED;
1862
1863	if (session->header.needs_swap) {
1864		mmap_prot  |= PROT_WRITE;
1865		mmap_flags = MAP_PRIVATE;
1866	}
1867remap:
1868	buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1869		   file_offset);
1870	if (buf == MAP_FAILED) {
1871		pr_err("failed to mmap file\n");
1872		err = -errno;
1873		goto out_err;
1874	}
1875	mmaps[map_idx] = buf;
1876	map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1877	file_pos = file_offset + head;
1878	if (session->one_mmap) {
1879		session->one_mmap_addr = buf;
1880		session->one_mmap_offset = file_offset;
1881	}
1882
1883more:
1884	event = fetch_mmaped_event(session, head, mmap_size, buf);
1885	if (!event) {
1886		if (mmaps[map_idx]) {
1887			munmap(mmaps[map_idx], mmap_size);
1888			mmaps[map_idx] = NULL;
1889		}
1890
1891		page_offset = page_size * (head / page_size);
1892		file_offset += page_offset;
1893		head -= page_offset;
1894		goto remap;
1895	}
1896
1897	size = event->header.size;
1898
1899	if (size < sizeof(struct perf_event_header) ||
1900	    (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1901		pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1902		       file_offset + head, event->header.size,
1903		       event->header.type);
1904		err = -EINVAL;
1905		goto out_err;
1906	}
1907
1908	if (skip)
1909		size += skip;
1910
1911	head += size;
1912	file_pos += size;
1913
1914	ui_progress__update(&prog, size);
1915
1916	if (session_done())
1917		goto out;
1918
1919	if (file_pos < file_size)
1920		goto more;
1921
1922out:
1923	/* do the final flush for ordered samples */
1924	err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1925	if (err)
1926		goto out_err;
1927	err = auxtrace__flush_events(session, tool);
1928	if (err)
1929		goto out_err;
1930	err = perf_session__flush_thread_stacks(session);
1931out_err:
1932	ui_progress__finish();
1933	if (!tool->no_warn)
1934		perf_session__warn_about_errors(session);
1935	/*
1936	 * We may switching perf.data output, make ordered_events
1937	 * reusable.
1938	 */
1939	ordered_events__reinit(&session->ordered_events);
1940	auxtrace__free_events(session);
1941	session->one_mmap = false;
1942	return err;
1943}
1944
1945int perf_session__process_events(struct perf_session *session)
1946{
1947	u64 size = perf_data__size(session->data);
1948	int err;
1949
1950	if (perf_session__register_idle_thread(session) < 0)
1951		return -ENOMEM;
1952
1953	if (!perf_data__is_pipe(session->data))
1954		err = __perf_session__process_events(session,
1955						     session->header.data_offset,
1956						     session->header.data_size, size);
1957	else
1958		err = __perf_session__process_pipe_events(session);
1959
1960	return err;
1961}
1962
1963bool perf_session__has_traces(struct perf_session *session, const char *msg)
1964{
1965	struct perf_evsel *evsel;
1966
1967	evlist__for_each_entry(session->evlist, evsel) {
1968		if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1969			return true;
1970	}
1971
1972	pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1973	return false;
1974}
1975
1976int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1977				     const char *symbol_name, u64 addr)
1978{
1979	char *bracket;
1980	int i;
1981	struct ref_reloc_sym *ref;
1982
1983	ref = zalloc(sizeof(struct ref_reloc_sym));
1984	if (ref == NULL)
1985		return -ENOMEM;
1986
1987	ref->name = strdup(symbol_name);
1988	if (ref->name == NULL) {
1989		free(ref);
1990		return -ENOMEM;
1991	}
1992
1993	bracket = strchr(ref->name, ']');
1994	if (bracket)
1995		*bracket = '\0';
1996
1997	ref->addr = addr;
1998
1999	for (i = 0; i < MAP__NR_TYPES; ++i) {
2000		struct kmap *kmap = map__kmap(maps[i]);
2001
2002		if (!kmap)
2003			continue;
2004		kmap->ref_reloc_sym = ref;
2005	}
2006
2007	return 0;
2008}
2009
2010size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
2011{
2012	return machines__fprintf_dsos(&session->machines, fp);
2013}
2014
2015size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
2016					  bool (skip)(struct dso *dso, int parm), int parm)
2017{
2018	return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
2019}
2020
2021size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
2022{
2023	size_t ret;
2024	const char *msg = "";
2025
2026	if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
2027		msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
2028
2029	ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
2030
2031	ret += events_stats__fprintf(&session->evlist->stats, fp);
2032	return ret;
2033}
2034
2035size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2036{
2037	/*
2038	 * FIXME: Here we have to actually print all the machines in this
2039	 * session, not just the host...
2040	 */
2041	return machine__fprintf(&session->machines.host, fp);
2042}
2043
2044struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
2045					      unsigned int type)
2046{
2047	struct perf_evsel *pos;
2048
2049	evlist__for_each_entry(session->evlist, pos) {
2050		if (pos->attr.type == type)
2051			return pos;
2052	}
2053	return NULL;
2054}
2055
2056int perf_session__cpu_bitmap(struct perf_session *session,
2057			     const char *cpu_list, unsigned long *cpu_bitmap)
2058{
2059	int i, err = -1;
2060	struct cpu_map *map;
2061
2062	for (i = 0; i < PERF_TYPE_MAX; ++i) {
2063		struct perf_evsel *evsel;
2064
2065		evsel = perf_session__find_first_evtype(session, i);
2066		if (!evsel)
2067			continue;
2068
2069		if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
2070			pr_err("File does not contain CPU events. "
2071			       "Remove -C option to proceed.\n");
2072			return -1;
2073		}
2074	}
2075
2076	map = cpu_map__new(cpu_list);
2077	if (map == NULL) {
2078		pr_err("Invalid cpu_list\n");
2079		return -1;
2080	}
2081
2082	for (i = 0; i < map->nr; i++) {
2083		int cpu = map->map[i];
2084
2085		if (cpu >= MAX_NR_CPUS) {
2086			pr_err("Requested CPU %d too large. "
2087			       "Consider raising MAX_NR_CPUS\n", cpu);
2088			goto out_delete_map;
2089		}
2090
2091		set_bit(cpu, cpu_bitmap);
2092	}
2093
2094	err = 0;
2095
2096out_delete_map:
2097	cpu_map__put(map);
2098	return err;
2099}
2100
2101void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2102				bool full)
2103{
2104	if (session == NULL || fp == NULL)
2105		return;
2106
2107	fprintf(fp, "# ========\n");
2108	perf_header__fprintf_info(session, fp, full);
2109	fprintf(fp, "# ========\n#\n");
2110}
2111
2112
2113int __perf_session__set_tracepoints_handlers(struct perf_session *session,
2114					     const struct perf_evsel_str_handler *assocs,
2115					     size_t nr_assocs)
2116{
2117	struct perf_evsel *evsel;
2118	size_t i;
2119	int err;
2120
2121	for (i = 0; i < nr_assocs; i++) {
2122		/*
2123		 * Adding a handler for an event not in the session,
2124		 * just ignore it.
2125		 */
2126		evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
2127		if (evsel == NULL)
2128			continue;
2129
2130		err = -EEXIST;
2131		if (evsel->handler != NULL)
2132			goto out;
2133		evsel->handler = assocs[i].handler;
2134	}
2135
2136	err = 0;
2137out:
2138	return err;
2139}
2140
2141int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
2142				 union perf_event *event,
2143				 struct perf_session *session)
2144{
2145	struct perf_evlist *evlist = session->evlist;
2146	struct id_index_event *ie = &event->id_index;
2147	size_t i, nr, max_nr;
2148
2149	max_nr = (ie->header.size - sizeof(struct id_index_event)) /
2150		 sizeof(struct id_index_entry);
2151	nr = ie->nr;
2152	if (nr > max_nr)
2153		return -EINVAL;
2154
2155	if (dump_trace)
2156		fprintf(stdout, " nr: %zu\n", nr);
2157
2158	for (i = 0; i < nr; i++) {
2159		struct id_index_entry *e = &ie->entries[i];
2160		struct perf_sample_id *sid;
2161
2162		if (dump_trace) {
2163			fprintf(stdout,	" ... id: %"PRIu64, e->id);
2164			fprintf(stdout,	"  idx: %"PRIu64, e->idx);
2165			fprintf(stdout,	"  cpu: %"PRId64, e->cpu);
2166			fprintf(stdout,	"  tid: %"PRId64"\n", e->tid);
2167		}
2168
2169		sid = perf_evlist__id2sid(evlist, e->id);
2170		if (!sid)
2171			return -ENOENT;
2172		sid->idx = e->idx;
2173		sid->cpu = e->cpu;
2174		sid->tid = e->tid;
2175	}
2176	return 0;
2177}
2178
2179int perf_event__synthesize_id_index(struct perf_tool *tool,
2180				    perf_event__handler_t process,
2181				    struct perf_evlist *evlist,
2182				    struct machine *machine)
2183{
2184	union perf_event *ev;
2185	struct perf_evsel *evsel;
2186	size_t nr = 0, i = 0, sz, max_nr, n;
2187	int err;
2188
2189	pr_debug2("Synthesizing id index\n");
2190
2191	max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2192		 sizeof(struct id_index_entry);
2193
2194	evlist__for_each_entry(evlist, evsel)
2195		nr += evsel->ids;
2196
2197	n = nr > max_nr ? max_nr : nr;
2198	sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2199	ev = zalloc(sz);
2200	if (!ev)
2201		return -ENOMEM;
2202
2203	ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2204	ev->id_index.header.size = sz;
2205	ev->id_index.nr = n;
2206
2207	evlist__for_each_entry(evlist, evsel) {
2208		u32 j;
2209
2210		for (j = 0; j < evsel->ids; j++) {
2211			struct id_index_entry *e;
2212			struct perf_sample_id *sid;
2213
2214			if (i >= n) {
2215				err = process(tool, ev, NULL, machine);
2216				if (err)
2217					goto out_err;
2218				nr -= n;
2219				i = 0;
2220			}
2221
2222			e = &ev->id_index.entries[i++];
2223
2224			e->id = evsel->id[j];
2225
2226			sid = perf_evlist__id2sid(evlist, e->id);
2227			if (!sid) {
2228				free(ev);
2229				return -ENOENT;
2230			}
2231
2232			e->idx = sid->idx;
2233			e->cpu = sid->cpu;
2234			e->tid = sid->tid;
2235		}
2236	}
2237
2238	sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2239	ev->id_index.header.size = sz;
2240	ev->id_index.nr = nr;
2241
2242	err = process(tool, ev, NULL, machine);
2243out_err:
2244	free(ev);
2245
2246	return err;
2247}