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v6.8
   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 <internal/lib.h>
  40
  41#ifdef HAVE_ZSTD_SUPPORT
  42static int perf_session__process_compressed_event(struct perf_session *session,
  43						  union perf_event *event, u64 file_offset,
  44						  const char *file_path)
  45{
  46	void *src;
  47	size_t decomp_size, src_size;
  48	u64 decomp_last_rem = 0;
  49	size_t mmap_len, decomp_len = session->header.env.comp_mmap_len;
  50	struct decomp *decomp, *decomp_last = session->active_decomp->decomp_last;
  51
  52	if (decomp_last) {
  53		decomp_last_rem = decomp_last->size - decomp_last->head;
  54		decomp_len += decomp_last_rem;
  55	}
  56
  57	mmap_len = sizeof(struct decomp) + decomp_len;
  58	decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE,
  59		      MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
  60	if (decomp == MAP_FAILED) {
  61		pr_err("Couldn't allocate memory for decompression\n");
  62		return -1;
  63	}
  64
  65	decomp->file_pos = file_offset;
  66	decomp->file_path = file_path;
  67	decomp->mmap_len = mmap_len;
  68	decomp->head = 0;
  69
  70	if (decomp_last_rem) {
  71		memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem);
  72		decomp->size = decomp_last_rem;
  73	}
  74
  75	src = (void *)event + sizeof(struct perf_record_compressed);
  76	src_size = event->pack.header.size - sizeof(struct perf_record_compressed);
  77
  78	decomp_size = zstd_decompress_stream(session->active_decomp->zstd_decomp, src, src_size,
  79				&(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem);
  80	if (!decomp_size) {
  81		munmap(decomp, mmap_len);
  82		pr_err("Couldn't decompress data\n");
  83		return -1;
  84	}
  85
  86	decomp->size += decomp_size;
  87
  88	if (session->active_decomp->decomp == NULL)
  89		session->active_decomp->decomp = decomp;
  90	else
  91		session->active_decomp->decomp_last->next = decomp;
  92
  93	session->active_decomp->decomp_last = decomp;
 
  94
  95	pr_debug("decomp (B): %zd to %zd\n", src_size, decomp_size);
  96
  97	return 0;
  98}
  99#else /* !HAVE_ZSTD_SUPPORT */
 100#define perf_session__process_compressed_event perf_session__process_compressed_event_stub
 101#endif
 102
 103static int perf_session__deliver_event(struct perf_session *session,
 104				       union perf_event *event,
 105				       struct perf_tool *tool,
 106				       u64 file_offset,
 107				       const char *file_path);
 108
 109static int perf_session__open(struct perf_session *session, int repipe_fd)
 110{
 111	struct perf_data *data = session->data;
 112
 113	if (perf_session__read_header(session, repipe_fd) < 0) {
 114		pr_err("incompatible file format (rerun with -v to learn more)\n");
 115		return -1;
 116	}
 117
 118	if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) {
 119		/* Auxiliary events may reference exited threads, hold onto dead ones. */
 120		symbol_conf.keep_exited_threads = true;
 121	}
 122
 123	if (perf_data__is_pipe(data))
 124		return 0;
 125
 126	if (perf_header__has_feat(&session->header, HEADER_STAT))
 127		return 0;
 128
 129	if (!evlist__valid_sample_type(session->evlist)) {
 130		pr_err("non matching sample_type\n");
 131		return -1;
 132	}
 133
 134	if (!evlist__valid_sample_id_all(session->evlist)) {
 135		pr_err("non matching sample_id_all\n");
 136		return -1;
 137	}
 138
 139	if (!evlist__valid_read_format(session->evlist)) {
 140		pr_err("non matching read_format\n");
 141		return -1;
 142	}
 143
 144	return 0;
 145}
 146
 147void perf_session__set_id_hdr_size(struct perf_session *session)
 148{
 149	u16 id_hdr_size = evlist__id_hdr_size(session->evlist);
 150
 151	machines__set_id_hdr_size(&session->machines, id_hdr_size);
 152}
 153
 154int perf_session__create_kernel_maps(struct perf_session *session)
 155{
 156	int ret = machine__create_kernel_maps(&session->machines.host);
 157
 158	if (ret >= 0)
 159		ret = machines__create_guest_kernel_maps(&session->machines);
 160	return ret;
 161}
 162
 163static void perf_session__destroy_kernel_maps(struct perf_session *session)
 164{
 165	machines__destroy_kernel_maps(&session->machines);
 166}
 167
 168static bool perf_session__has_comm_exec(struct perf_session *session)
 169{
 170	struct evsel *evsel;
 171
 172	evlist__for_each_entry(session->evlist, evsel) {
 173		if (evsel->core.attr.comm_exec)
 174			return true;
 175	}
 176
 177	return false;
 178}
 179
 180static void perf_session__set_comm_exec(struct perf_session *session)
 181{
 182	bool comm_exec = perf_session__has_comm_exec(session);
 183
 184	machines__set_comm_exec(&session->machines, comm_exec);
 185}
 186
 187static int ordered_events__deliver_event(struct ordered_events *oe,
 188					 struct ordered_event *event)
 189{
 190	struct perf_session *session = container_of(oe, struct perf_session,
 191						    ordered_events);
 192
 193	return perf_session__deliver_event(session, event->event,
 194					   session->tool, event->file_offset,
 195					   event->file_path);
 196}
 197
 198struct perf_session *__perf_session__new(struct perf_data *data,
 199					 bool repipe, int repipe_fd,
 200					 struct perf_tool *tool)
 201{
 202	int ret = -ENOMEM;
 203	struct perf_session *session = zalloc(sizeof(*session));
 204
 205	if (!session)
 206		goto out;
 207
 208	session->repipe = repipe;
 209	session->tool   = tool;
 210	session->decomp_data.zstd_decomp = &session->zstd_data;
 211	session->active_decomp = &session->decomp_data;
 212	INIT_LIST_HEAD(&session->auxtrace_index);
 213	machines__init(&session->machines);
 214	ordered_events__init(&session->ordered_events,
 215			     ordered_events__deliver_event, NULL);
 216
 217	perf_env__init(&session->header.env);
 218	if (data) {
 219		ret = perf_data__open(data);
 220		if (ret < 0)
 221			goto out_delete;
 222
 223		session->data = data;
 224
 225		if (perf_data__is_read(data)) {
 226			ret = perf_session__open(session, repipe_fd);
 227			if (ret < 0)
 228				goto out_delete;
 229
 230			/*
 231			 * set session attributes that are present in perf.data
 232			 * but not in pipe-mode.
 233			 */
 234			if (!data->is_pipe) {
 235				perf_session__set_id_hdr_size(session);
 236				perf_session__set_comm_exec(session);
 237			}
 238
 239			evlist__init_trace_event_sample_raw(session->evlist);
 240
 241			/* Open the directory data. */
 242			if (data->is_dir) {
 243				ret = perf_data__open_dir(data);
 244				if (ret)
 245					goto out_delete;
 246			}
 247
 248			if (!symbol_conf.kallsyms_name &&
 249			    !symbol_conf.vmlinux_name)
 250				symbol_conf.kallsyms_name = perf_data__kallsyms_name(data);
 251		}
 252	} else  {
 253		session->machines.host.env = &perf_env;
 254	}
 255
 256	session->machines.host.single_address_space =
 257		perf_env__single_address_space(session->machines.host.env);
 258
 259	if (!data || perf_data__is_write(data)) {
 260		/*
 261		 * In O_RDONLY mode this will be performed when reading the
 262		 * kernel MMAP event, in perf_event__process_mmap().
 263		 */
 264		if (perf_session__create_kernel_maps(session) < 0)
 265			pr_warning("Cannot read kernel map\n");
 266	}
 267
 268	/*
 269	 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
 270	 * processed, so evlist__sample_id_all is not meaningful here.
 271	 */
 272	if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps &&
 273	    tool->ordered_events && !evlist__sample_id_all(session->evlist)) {
 274		dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
 275		tool->ordered_events = false;
 276	}
 277
 278	return session;
 279
 280 out_delete:
 281	perf_session__delete(session);
 282 out:
 283	return ERR_PTR(ret);
 284}
 285
 286static void perf_decomp__release_events(struct decomp *next)
 287{
 288	struct decomp *decomp;
 289	size_t mmap_len;
 290
 
 
 
 
 
 291	do {
 292		decomp = next;
 293		if (decomp == NULL)
 294			break;
 295		next = decomp->next;
 296		mmap_len = decomp->mmap_len;
 297		munmap(decomp, mmap_len);
 298	} while (1);
 299}
 300
 301void perf_session__delete(struct perf_session *session)
 302{
 303	if (session == NULL)
 304		return;
 305	auxtrace__free(session);
 306	auxtrace_index__free(&session->auxtrace_index);
 307	perf_session__destroy_kernel_maps(session);
 308	perf_decomp__release_events(session->decomp_data.decomp);
 
 309	perf_env__exit(&session->header.env);
 310	machines__exit(&session->machines);
 311	if (session->data) {
 312		if (perf_data__is_read(session->data))
 313			evlist__delete(session->evlist);
 314		perf_data__close(session->data);
 315	}
 316#ifdef HAVE_LIBTRACEEVENT
 317	trace_event__cleanup(&session->tevent);
 318#endif
 319	free(session);
 320}
 321
 322static int process_event_synth_tracing_data_stub(struct perf_session *session
 323						 __maybe_unused,
 324						 union perf_event *event
 325						 __maybe_unused)
 326{
 327	dump_printf(": unhandled!\n");
 328	return 0;
 329}
 330
 331static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
 332					 union perf_event *event __maybe_unused,
 333					 struct evlist **pevlist
 334					 __maybe_unused)
 335{
 336	dump_printf(": unhandled!\n");
 337	return 0;
 338}
 339
 340static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
 341						 union perf_event *event __maybe_unused,
 342						 struct evlist **pevlist
 343						 __maybe_unused)
 344{
 345	if (dump_trace)
 346		perf_event__fprintf_event_update(event, stdout);
 347
 348	dump_printf(": unhandled!\n");
 349	return 0;
 350}
 351
 352static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
 353				     union perf_event *event __maybe_unused,
 354				     struct perf_sample *sample __maybe_unused,
 355				     struct evsel *evsel __maybe_unused,
 356				     struct machine *machine __maybe_unused)
 357{
 358	dump_printf(": unhandled!\n");
 359	return 0;
 360}
 361
 362static int process_event_stub(struct perf_tool *tool __maybe_unused,
 363			      union perf_event *event __maybe_unused,
 364			      struct perf_sample *sample __maybe_unused,
 365			      struct machine *machine __maybe_unused)
 366{
 367	dump_printf(": unhandled!\n");
 368	return 0;
 369}
 370
 371static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
 372				       union perf_event *event __maybe_unused,
 373				       struct ordered_events *oe __maybe_unused)
 374{
 375	dump_printf(": unhandled!\n");
 376	return 0;
 377}
 378
 
 
 
 
 379static int skipn(int fd, off_t n)
 380{
 381	char buf[4096];
 382	ssize_t ret;
 383
 384	while (n > 0) {
 385		ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
 386		if (ret <= 0)
 387			return ret;
 388		n -= ret;
 389	}
 390
 391	return 0;
 392}
 393
 394static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused,
 395				       union perf_event *event)
 396{
 397	dump_printf(": unhandled!\n");
 398	if (perf_data__is_pipe(session->data))
 399		skipn(perf_data__fd(session->data), event->auxtrace.size);
 400	return event->auxtrace.size;
 401}
 402
 403static int process_event_op2_stub(struct perf_session *session __maybe_unused,
 404				  union perf_event *event __maybe_unused)
 405{
 406	dump_printf(": unhandled!\n");
 407	return 0;
 408}
 409
 410
 411static
 412int process_event_thread_map_stub(struct perf_session *session __maybe_unused,
 413				  union perf_event *event __maybe_unused)
 414{
 415	if (dump_trace)
 416		perf_event__fprintf_thread_map(event, stdout);
 417
 418	dump_printf(": unhandled!\n");
 419	return 0;
 420}
 421
 422static
 423int process_event_cpu_map_stub(struct perf_session *session __maybe_unused,
 424			       union perf_event *event __maybe_unused)
 425{
 426	if (dump_trace)
 427		perf_event__fprintf_cpu_map(event, stdout);
 428
 429	dump_printf(": unhandled!\n");
 430	return 0;
 431}
 432
 433static
 434int process_event_stat_config_stub(struct perf_session *session __maybe_unused,
 435				   union perf_event *event __maybe_unused)
 436{
 437	if (dump_trace)
 438		perf_event__fprintf_stat_config(event, stdout);
 439
 440	dump_printf(": unhandled!\n");
 441	return 0;
 442}
 443
 444static int process_stat_stub(struct perf_session *perf_session __maybe_unused,
 445			     union perf_event *event)
 446{
 447	if (dump_trace)
 448		perf_event__fprintf_stat(event, stdout);
 449
 450	dump_printf(": unhandled!\n");
 451	return 0;
 452}
 453
 454static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused,
 455				   union perf_event *event)
 456{
 457	if (dump_trace)
 458		perf_event__fprintf_stat_round(event, stdout);
 459
 460	dump_printf(": unhandled!\n");
 461	return 0;
 462}
 463
 464static int process_event_time_conv_stub(struct perf_session *perf_session __maybe_unused,
 465					union perf_event *event)
 466{
 467	if (dump_trace)
 468		perf_event__fprintf_time_conv(event, stdout);
 469
 470	dump_printf(": unhandled!\n");
 471	return 0;
 472}
 473
 474static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused,
 475						       union perf_event *event __maybe_unused,
 476						       u64 file_offset __maybe_unused,
 477						       const char *file_path __maybe_unused)
 478{
 479       dump_printf(": unhandled!\n");
 480       return 0;
 481}
 482
 483void perf_tool__fill_defaults(struct perf_tool *tool)
 484{
 485	if (tool->sample == NULL)
 486		tool->sample = process_event_sample_stub;
 487	if (tool->mmap == NULL)
 488		tool->mmap = process_event_stub;
 489	if (tool->mmap2 == NULL)
 490		tool->mmap2 = process_event_stub;
 491	if (tool->comm == NULL)
 492		tool->comm = process_event_stub;
 493	if (tool->namespaces == NULL)
 494		tool->namespaces = process_event_stub;
 495	if (tool->cgroup == NULL)
 496		tool->cgroup = process_event_stub;
 497	if (tool->fork == NULL)
 498		tool->fork = process_event_stub;
 499	if (tool->exit == NULL)
 500		tool->exit = process_event_stub;
 501	if (tool->lost == NULL)
 502		tool->lost = perf_event__process_lost;
 503	if (tool->lost_samples == NULL)
 504		tool->lost_samples = perf_event__process_lost_samples;
 505	if (tool->aux == NULL)
 506		tool->aux = perf_event__process_aux;
 507	if (tool->itrace_start == NULL)
 508		tool->itrace_start = perf_event__process_itrace_start;
 509	if (tool->context_switch == NULL)
 510		tool->context_switch = perf_event__process_switch;
 511	if (tool->ksymbol == NULL)
 512		tool->ksymbol = perf_event__process_ksymbol;
 513	if (tool->bpf == NULL)
 514		tool->bpf = perf_event__process_bpf;
 515	if (tool->text_poke == NULL)
 516		tool->text_poke = perf_event__process_text_poke;
 517	if (tool->aux_output_hw_id == NULL)
 518		tool->aux_output_hw_id = perf_event__process_aux_output_hw_id;
 519	if (tool->read == NULL)
 520		tool->read = process_event_sample_stub;
 521	if (tool->throttle == NULL)
 522		tool->throttle = process_event_stub;
 523	if (tool->unthrottle == NULL)
 524		tool->unthrottle = process_event_stub;
 525	if (tool->attr == NULL)
 526		tool->attr = process_event_synth_attr_stub;
 527	if (tool->event_update == NULL)
 528		tool->event_update = process_event_synth_event_update_stub;
 529	if (tool->tracing_data == NULL)
 530		tool->tracing_data = process_event_synth_tracing_data_stub;
 531	if (tool->build_id == NULL)
 532		tool->build_id = process_event_op2_stub;
 533	if (tool->finished_round == NULL) {
 534		if (tool->ordered_events)
 535			tool->finished_round = perf_event__process_finished_round;
 536		else
 537			tool->finished_round = process_finished_round_stub;
 538	}
 539	if (tool->id_index == NULL)
 540		tool->id_index = process_event_op2_stub;
 541	if (tool->auxtrace_info == NULL)
 542		tool->auxtrace_info = process_event_op2_stub;
 543	if (tool->auxtrace == NULL)
 544		tool->auxtrace = process_event_auxtrace_stub;
 545	if (tool->auxtrace_error == NULL)
 546		tool->auxtrace_error = process_event_op2_stub;
 547	if (tool->thread_map == NULL)
 548		tool->thread_map = process_event_thread_map_stub;
 549	if (tool->cpu_map == NULL)
 550		tool->cpu_map = process_event_cpu_map_stub;
 551	if (tool->stat_config == NULL)
 552		tool->stat_config = process_event_stat_config_stub;
 553	if (tool->stat == NULL)
 554		tool->stat = process_stat_stub;
 555	if (tool->stat_round == NULL)
 556		tool->stat_round = process_stat_round_stub;
 557	if (tool->time_conv == NULL)
 558		tool->time_conv = process_event_time_conv_stub;
 559	if (tool->feature == NULL)
 560		tool->feature = process_event_op2_stub;
 561	if (tool->compressed == NULL)
 562		tool->compressed = perf_session__process_compressed_event;
 563	if (tool->finished_init == NULL)
 564		tool->finished_init = process_event_op2_stub;
 565}
 566
 567static void swap_sample_id_all(union perf_event *event, void *data)
 568{
 569	void *end = (void *) event + event->header.size;
 570	int size = end - data;
 571
 572	BUG_ON(size % sizeof(u64));
 573	mem_bswap_64(data, size);
 574}
 575
 576static void perf_event__all64_swap(union perf_event *event,
 577				   bool sample_id_all __maybe_unused)
 578{
 579	struct perf_event_header *hdr = &event->header;
 580	mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 581}
 582
 583static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
 584{
 585	event->comm.pid = bswap_32(event->comm.pid);
 586	event->comm.tid = bswap_32(event->comm.tid);
 587
 588	if (sample_id_all) {
 589		void *data = &event->comm.comm;
 590
 591		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 592		swap_sample_id_all(event, data);
 593	}
 594}
 595
 596static void perf_event__mmap_swap(union perf_event *event,
 597				  bool sample_id_all)
 598{
 599	event->mmap.pid	  = bswap_32(event->mmap.pid);
 600	event->mmap.tid	  = bswap_32(event->mmap.tid);
 601	event->mmap.start = bswap_64(event->mmap.start);
 602	event->mmap.len	  = bswap_64(event->mmap.len);
 603	event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 604
 605	if (sample_id_all) {
 606		void *data = &event->mmap.filename;
 607
 608		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 609		swap_sample_id_all(event, data);
 610	}
 611}
 612
 613static void perf_event__mmap2_swap(union perf_event *event,
 614				  bool sample_id_all)
 615{
 616	event->mmap2.pid   = bswap_32(event->mmap2.pid);
 617	event->mmap2.tid   = bswap_32(event->mmap2.tid);
 618	event->mmap2.start = bswap_64(event->mmap2.start);
 619	event->mmap2.len   = bswap_64(event->mmap2.len);
 620	event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
 621
 622	if (!(event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID)) {
 623		event->mmap2.maj   = bswap_32(event->mmap2.maj);
 624		event->mmap2.min   = bswap_32(event->mmap2.min);
 625		event->mmap2.ino   = bswap_64(event->mmap2.ino);
 626		event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation);
 627	}
 628
 629	if (sample_id_all) {
 630		void *data = &event->mmap2.filename;
 631
 632		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 633		swap_sample_id_all(event, data);
 634	}
 635}
 636static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
 637{
 638	event->fork.pid	 = bswap_32(event->fork.pid);
 639	event->fork.tid	 = bswap_32(event->fork.tid);
 640	event->fork.ppid = bswap_32(event->fork.ppid);
 641	event->fork.ptid = bswap_32(event->fork.ptid);
 642	event->fork.time = bswap_64(event->fork.time);
 643
 644	if (sample_id_all)
 645		swap_sample_id_all(event, &event->fork + 1);
 646}
 647
 648static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
 649{
 650	event->read.pid		 = bswap_32(event->read.pid);
 651	event->read.tid		 = bswap_32(event->read.tid);
 652	event->read.value	 = bswap_64(event->read.value);
 653	event->read.time_enabled = bswap_64(event->read.time_enabled);
 654	event->read.time_running = bswap_64(event->read.time_running);
 655	event->read.id		 = bswap_64(event->read.id);
 656
 657	if (sample_id_all)
 658		swap_sample_id_all(event, &event->read + 1);
 659}
 660
 661static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
 662{
 663	event->aux.aux_offset = bswap_64(event->aux.aux_offset);
 664	event->aux.aux_size   = bswap_64(event->aux.aux_size);
 665	event->aux.flags      = bswap_64(event->aux.flags);
 666
 667	if (sample_id_all)
 668		swap_sample_id_all(event, &event->aux + 1);
 669}
 670
 671static void perf_event__itrace_start_swap(union perf_event *event,
 672					  bool sample_id_all)
 673{
 674	event->itrace_start.pid	 = bswap_32(event->itrace_start.pid);
 675	event->itrace_start.tid	 = bswap_32(event->itrace_start.tid);
 676
 677	if (sample_id_all)
 678		swap_sample_id_all(event, &event->itrace_start + 1);
 679}
 680
 681static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
 682{
 683	if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
 684		event->context_switch.next_prev_pid =
 685				bswap_32(event->context_switch.next_prev_pid);
 686		event->context_switch.next_prev_tid =
 687				bswap_32(event->context_switch.next_prev_tid);
 688	}
 689
 690	if (sample_id_all)
 691		swap_sample_id_all(event, &event->context_switch + 1);
 692}
 693
 694static void perf_event__text_poke_swap(union perf_event *event, bool sample_id_all)
 695{
 696	event->text_poke.addr    = bswap_64(event->text_poke.addr);
 697	event->text_poke.old_len = bswap_16(event->text_poke.old_len);
 698	event->text_poke.new_len = bswap_16(event->text_poke.new_len);
 699
 700	if (sample_id_all) {
 701		size_t len = sizeof(event->text_poke.old_len) +
 702			     sizeof(event->text_poke.new_len) +
 703			     event->text_poke.old_len +
 704			     event->text_poke.new_len;
 705		void *data = &event->text_poke.old_len;
 706
 707		data += PERF_ALIGN(len, sizeof(u64));
 708		swap_sample_id_all(event, data);
 709	}
 710}
 711
 712static void perf_event__throttle_swap(union perf_event *event,
 713				      bool sample_id_all)
 714{
 715	event->throttle.time	  = bswap_64(event->throttle.time);
 716	event->throttle.id	  = bswap_64(event->throttle.id);
 717	event->throttle.stream_id = bswap_64(event->throttle.stream_id);
 718
 719	if (sample_id_all)
 720		swap_sample_id_all(event, &event->throttle + 1);
 721}
 722
 723static void perf_event__namespaces_swap(union perf_event *event,
 724					bool sample_id_all)
 725{
 726	u64 i;
 727
 728	event->namespaces.pid		= bswap_32(event->namespaces.pid);
 729	event->namespaces.tid		= bswap_32(event->namespaces.tid);
 730	event->namespaces.nr_namespaces	= bswap_64(event->namespaces.nr_namespaces);
 731
 732	for (i = 0; i < event->namespaces.nr_namespaces; i++) {
 733		struct perf_ns_link_info *ns = &event->namespaces.link_info[i];
 734
 735		ns->dev = bswap_64(ns->dev);
 736		ns->ino = bswap_64(ns->ino);
 737	}
 738
 739	if (sample_id_all)
 740		swap_sample_id_all(event, &event->namespaces.link_info[i]);
 741}
 742
 743static void perf_event__cgroup_swap(union perf_event *event, bool sample_id_all)
 744{
 745	event->cgroup.id = bswap_64(event->cgroup.id);
 746
 747	if (sample_id_all) {
 748		void *data = &event->cgroup.path;
 749
 750		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 751		swap_sample_id_all(event, data);
 752	}
 753}
 754
 755static u8 revbyte(u8 b)
 756{
 757	int rev = (b >> 4) | ((b & 0xf) << 4);
 758	rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 759	rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 760	return (u8) rev;
 761}
 762
 763/*
 764 * XXX this is hack in attempt to carry flags bitfield
 765 * through endian village. ABI says:
 766 *
 767 * Bit-fields are allocated from right to left (least to most significant)
 768 * on little-endian implementations and from left to right (most to least
 769 * significant) on big-endian implementations.
 770 *
 771 * The above seems to be byte specific, so we need to reverse each
 772 * byte of the bitfield. 'Internet' also says this might be implementation
 773 * specific and we probably need proper fix and carry perf_event_attr
 774 * bitfield flags in separate data file FEAT_ section. Thought this seems
 775 * to work for now.
 776 */
 777static void swap_bitfield(u8 *p, unsigned len)
 778{
 779	unsigned i;
 780
 781	for (i = 0; i < len; i++) {
 782		*p = revbyte(*p);
 783		p++;
 784	}
 785}
 786
 787/* exported for swapping attributes in file header */
 788void perf_event__attr_swap(struct perf_event_attr *attr)
 789{
 790	attr->type		= bswap_32(attr->type);
 791	attr->size		= bswap_32(attr->size);
 792
 793#define bswap_safe(f, n) 					\
 794	(attr->size > (offsetof(struct perf_event_attr, f) + 	\
 795		       sizeof(attr->f) * (n)))
 796#define bswap_field(f, sz) 			\
 797do { 						\
 798	if (bswap_safe(f, 0))			\
 799		attr->f = bswap_##sz(attr->f);	\
 800} while(0)
 801#define bswap_field_16(f) bswap_field(f, 16)
 802#define bswap_field_32(f) bswap_field(f, 32)
 803#define bswap_field_64(f) bswap_field(f, 64)
 804
 805	bswap_field_64(config);
 806	bswap_field_64(sample_period);
 807	bswap_field_64(sample_type);
 808	bswap_field_64(read_format);
 809	bswap_field_32(wakeup_events);
 810	bswap_field_32(bp_type);
 811	bswap_field_64(bp_addr);
 812	bswap_field_64(bp_len);
 813	bswap_field_64(branch_sample_type);
 814	bswap_field_64(sample_regs_user);
 815	bswap_field_32(sample_stack_user);
 816	bswap_field_32(aux_watermark);
 817	bswap_field_16(sample_max_stack);
 818	bswap_field_32(aux_sample_size);
 819
 820	/*
 821	 * After read_format are bitfields. Check read_format because
 822	 * we are unable to use offsetof on bitfield.
 823	 */
 824	if (bswap_safe(read_format, 1))
 825		swap_bitfield((u8 *) (&attr->read_format + 1),
 826			      sizeof(u64));
 827#undef bswap_field_64
 828#undef bswap_field_32
 829#undef bswap_field
 830#undef bswap_safe
 831}
 832
 833static void perf_event__hdr_attr_swap(union perf_event *event,
 834				      bool sample_id_all __maybe_unused)
 835{
 836	size_t size;
 837
 838	perf_event__attr_swap(&event->attr.attr);
 839
 840	size = event->header.size;
 841	size -= perf_record_header_attr_id(event) - (void *)event;
 842	mem_bswap_64(perf_record_header_attr_id(event), size);
 843}
 844
 845static void perf_event__event_update_swap(union perf_event *event,
 846					  bool sample_id_all __maybe_unused)
 847{
 848	event->event_update.type = bswap_64(event->event_update.type);
 849	event->event_update.id   = bswap_64(event->event_update.id);
 850}
 851
 852static void perf_event__event_type_swap(union perf_event *event,
 853					bool sample_id_all __maybe_unused)
 854{
 855	event->event_type.event_type.event_id =
 856		bswap_64(event->event_type.event_type.event_id);
 857}
 858
 859static void perf_event__tracing_data_swap(union perf_event *event,
 860					  bool sample_id_all __maybe_unused)
 861{
 862	event->tracing_data.size = bswap_32(event->tracing_data.size);
 863}
 864
 865static void perf_event__auxtrace_info_swap(union perf_event *event,
 866					   bool sample_id_all __maybe_unused)
 867{
 868	size_t size;
 869
 870	event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
 871
 872	size = event->header.size;
 873	size -= (void *)&event->auxtrace_info.priv - (void *)event;
 874	mem_bswap_64(event->auxtrace_info.priv, size);
 875}
 876
 877static void perf_event__auxtrace_swap(union perf_event *event,
 878				      bool sample_id_all __maybe_unused)
 879{
 880	event->auxtrace.size      = bswap_64(event->auxtrace.size);
 881	event->auxtrace.offset    = bswap_64(event->auxtrace.offset);
 882	event->auxtrace.reference = bswap_64(event->auxtrace.reference);
 883	event->auxtrace.idx       = bswap_32(event->auxtrace.idx);
 884	event->auxtrace.tid       = bswap_32(event->auxtrace.tid);
 885	event->auxtrace.cpu       = bswap_32(event->auxtrace.cpu);
 886}
 887
 888static void perf_event__auxtrace_error_swap(union perf_event *event,
 889					    bool sample_id_all __maybe_unused)
 890{
 891	event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
 892	event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
 893	event->auxtrace_error.cpu  = bswap_32(event->auxtrace_error.cpu);
 894	event->auxtrace_error.pid  = bswap_32(event->auxtrace_error.pid);
 895	event->auxtrace_error.tid  = bswap_32(event->auxtrace_error.tid);
 896	event->auxtrace_error.fmt  = bswap_32(event->auxtrace_error.fmt);
 897	event->auxtrace_error.ip   = bswap_64(event->auxtrace_error.ip);
 898	if (event->auxtrace_error.fmt)
 899		event->auxtrace_error.time = bswap_64(event->auxtrace_error.time);
 900	if (event->auxtrace_error.fmt >= 2) {
 901		event->auxtrace_error.machine_pid = bswap_32(event->auxtrace_error.machine_pid);
 902		event->auxtrace_error.vcpu = bswap_32(event->auxtrace_error.vcpu);
 903	}
 904}
 905
 906static void perf_event__thread_map_swap(union perf_event *event,
 907					bool sample_id_all __maybe_unused)
 908{
 909	unsigned i;
 910
 911	event->thread_map.nr = bswap_64(event->thread_map.nr);
 912
 913	for (i = 0; i < event->thread_map.nr; i++)
 914		event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
 915}
 916
 917static void perf_event__cpu_map_swap(union perf_event *event,
 918				     bool sample_id_all __maybe_unused)
 919{
 920	struct perf_record_cpu_map_data *data = &event->cpu_map.data;
 
 
 
 921
 922	data->type = bswap_16(data->type);
 923
 924	switch (data->type) {
 925	case PERF_CPU_MAP__CPUS:
 926		data->cpus_data.nr = bswap_16(data->cpus_data.nr);
 927
 928		for (unsigned i = 0; i < data->cpus_data.nr; i++)
 929			data->cpus_data.cpu[i] = bswap_16(data->cpus_data.cpu[i]);
 
 
 930		break;
 931	case PERF_CPU_MAP__MASK:
 932		data->mask32_data.long_size = bswap_16(data->mask32_data.long_size);
 933
 934		switch (data->mask32_data.long_size) {
 935		case 4:
 936			data->mask32_data.nr = bswap_16(data->mask32_data.nr);
 937			for (unsigned i = 0; i < data->mask32_data.nr; i++)
 938				data->mask32_data.mask[i] = bswap_32(data->mask32_data.mask[i]);
 939			break;
 940		case 8:
 941			data->mask64_data.nr = bswap_16(data->mask64_data.nr);
 942			for (unsigned i = 0; i < data->mask64_data.nr; i++)
 943				data->mask64_data.mask[i] = bswap_64(data->mask64_data.mask[i]);
 944			break;
 945		default:
 946			pr_err("cpu_map swap: unsupported long size\n");
 947		}
 948		break;
 949	case PERF_CPU_MAP__RANGE_CPUS:
 950		data->range_cpu_data.start_cpu = bswap_16(data->range_cpu_data.start_cpu);
 951		data->range_cpu_data.end_cpu = bswap_16(data->range_cpu_data.end_cpu);
 952		break;
 953	default:
 954		break;
 955	}
 956}
 957
 958static void perf_event__stat_config_swap(union perf_event *event,
 959					 bool sample_id_all __maybe_unused)
 960{
 961	u64 size;
 962
 963	size  = bswap_64(event->stat_config.nr) * sizeof(event->stat_config.data[0]);
 964	size += 1; /* nr item itself */
 965	mem_bswap_64(&event->stat_config.nr, size);
 966}
 967
 968static void perf_event__stat_swap(union perf_event *event,
 969				  bool sample_id_all __maybe_unused)
 970{
 971	event->stat.id     = bswap_64(event->stat.id);
 972	event->stat.thread = bswap_32(event->stat.thread);
 973	event->stat.cpu    = bswap_32(event->stat.cpu);
 974	event->stat.val    = bswap_64(event->stat.val);
 975	event->stat.ena    = bswap_64(event->stat.ena);
 976	event->stat.run    = bswap_64(event->stat.run);
 977}
 978
 979static void perf_event__stat_round_swap(union perf_event *event,
 980					bool sample_id_all __maybe_unused)
 981{
 982	event->stat_round.type = bswap_64(event->stat_round.type);
 983	event->stat_round.time = bswap_64(event->stat_round.time);
 984}
 985
 986static void perf_event__time_conv_swap(union perf_event *event,
 987				       bool sample_id_all __maybe_unused)
 988{
 989	event->time_conv.time_shift = bswap_64(event->time_conv.time_shift);
 990	event->time_conv.time_mult  = bswap_64(event->time_conv.time_mult);
 991	event->time_conv.time_zero  = bswap_64(event->time_conv.time_zero);
 992
 993	if (event_contains(event->time_conv, time_cycles)) {
 994		event->time_conv.time_cycles = bswap_64(event->time_conv.time_cycles);
 995		event->time_conv.time_mask = bswap_64(event->time_conv.time_mask);
 996	}
 997}
 998
 999typedef void (*perf_event__swap_op)(union perf_event *event,
1000				    bool sample_id_all);
1001
1002static perf_event__swap_op perf_event__swap_ops[] = {
1003	[PERF_RECORD_MMAP]		  = perf_event__mmap_swap,
1004	[PERF_RECORD_MMAP2]		  = perf_event__mmap2_swap,
1005	[PERF_RECORD_COMM]		  = perf_event__comm_swap,
1006	[PERF_RECORD_FORK]		  = perf_event__task_swap,
1007	[PERF_RECORD_EXIT]		  = perf_event__task_swap,
1008	[PERF_RECORD_LOST]		  = perf_event__all64_swap,
1009	[PERF_RECORD_READ]		  = perf_event__read_swap,
1010	[PERF_RECORD_THROTTLE]		  = perf_event__throttle_swap,
1011	[PERF_RECORD_UNTHROTTLE]	  = perf_event__throttle_swap,
1012	[PERF_RECORD_SAMPLE]		  = perf_event__all64_swap,
1013	[PERF_RECORD_AUX]		  = perf_event__aux_swap,
1014	[PERF_RECORD_ITRACE_START]	  = perf_event__itrace_start_swap,
1015	[PERF_RECORD_LOST_SAMPLES]	  = perf_event__all64_swap,
1016	[PERF_RECORD_SWITCH]		  = perf_event__switch_swap,
1017	[PERF_RECORD_SWITCH_CPU_WIDE]	  = perf_event__switch_swap,
1018	[PERF_RECORD_NAMESPACES]	  = perf_event__namespaces_swap,
1019	[PERF_RECORD_CGROUP]		  = perf_event__cgroup_swap,
1020	[PERF_RECORD_TEXT_POKE]		  = perf_event__text_poke_swap,
1021	[PERF_RECORD_AUX_OUTPUT_HW_ID]	  = perf_event__all64_swap,
1022	[PERF_RECORD_HEADER_ATTR]	  = perf_event__hdr_attr_swap,
1023	[PERF_RECORD_HEADER_EVENT_TYPE]	  = perf_event__event_type_swap,
1024	[PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
1025	[PERF_RECORD_HEADER_BUILD_ID]	  = NULL,
1026	[PERF_RECORD_ID_INDEX]		  = perf_event__all64_swap,
1027	[PERF_RECORD_AUXTRACE_INFO]	  = perf_event__auxtrace_info_swap,
1028	[PERF_RECORD_AUXTRACE]		  = perf_event__auxtrace_swap,
1029	[PERF_RECORD_AUXTRACE_ERROR]	  = perf_event__auxtrace_error_swap,
1030	[PERF_RECORD_THREAD_MAP]	  = perf_event__thread_map_swap,
1031	[PERF_RECORD_CPU_MAP]		  = perf_event__cpu_map_swap,
1032	[PERF_RECORD_STAT_CONFIG]	  = perf_event__stat_config_swap,
1033	[PERF_RECORD_STAT]		  = perf_event__stat_swap,
1034	[PERF_RECORD_STAT_ROUND]	  = perf_event__stat_round_swap,
1035	[PERF_RECORD_EVENT_UPDATE]	  = perf_event__event_update_swap,
1036	[PERF_RECORD_TIME_CONV]		  = perf_event__time_conv_swap,
1037	[PERF_RECORD_HEADER_MAX]	  = NULL,
1038};
1039
1040/*
1041 * When perf record finishes a pass on every buffers, it records this pseudo
1042 * event.
1043 * We record the max timestamp t found in the pass n.
1044 * Assuming these timestamps are monotonic across cpus, we know that if
1045 * a buffer still has events with timestamps below t, they will be all
1046 * available and then read in the pass n + 1.
1047 * Hence when we start to read the pass n + 2, we can safely flush every
1048 * events with timestamps below t.
1049 *
1050 *    ============ PASS n =================
1051 *       CPU 0         |   CPU 1
1052 *                     |
1053 *    cnt1 timestamps  |   cnt2 timestamps
1054 *          1          |         2
1055 *          2          |         3
1056 *          -          |         4  <--- max recorded
1057 *
1058 *    ============ PASS n + 1 ==============
1059 *       CPU 0         |   CPU 1
1060 *                     |
1061 *    cnt1 timestamps  |   cnt2 timestamps
1062 *          3          |         5
1063 *          4          |         6
1064 *          5          |         7 <---- max recorded
1065 *
1066 *      Flush every events below timestamp 4
1067 *
1068 *    ============ PASS n + 2 ==============
1069 *       CPU 0         |   CPU 1
1070 *                     |
1071 *    cnt1 timestamps  |   cnt2 timestamps
1072 *          6          |         8
1073 *          7          |         9
1074 *          -          |         10
1075 *
1076 *      Flush every events below timestamp 7
1077 *      etc...
1078 */
1079int perf_event__process_finished_round(struct perf_tool *tool __maybe_unused,
1080				       union perf_event *event __maybe_unused,
1081				       struct ordered_events *oe)
1082{
1083	if (dump_trace)
1084		fprintf(stdout, "\n");
1085	return ordered_events__flush(oe, OE_FLUSH__ROUND);
1086}
1087
1088int perf_session__queue_event(struct perf_session *s, union perf_event *event,
1089			      u64 timestamp, u64 file_offset, const char *file_path)
1090{
1091	return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset, file_path);
1092}
1093
1094static void callchain__lbr_callstack_printf(struct perf_sample *sample)
1095{
1096	struct ip_callchain *callchain = sample->callchain;
1097	struct branch_stack *lbr_stack = sample->branch_stack;
1098	struct branch_entry *entries = perf_sample__branch_entries(sample);
1099	u64 kernel_callchain_nr = callchain->nr;
1100	unsigned int i;
1101
1102	for (i = 0; i < kernel_callchain_nr; i++) {
1103		if (callchain->ips[i] == PERF_CONTEXT_USER)
1104			break;
1105	}
1106
1107	if ((i != kernel_callchain_nr) && lbr_stack->nr) {
1108		u64 total_nr;
1109		/*
1110		 * LBR callstack can only get user call chain,
1111		 * i is kernel call chain number,
1112		 * 1 is PERF_CONTEXT_USER.
1113		 *
1114		 * The user call chain is stored in LBR registers.
1115		 * LBR are pair registers. The caller is stored
1116		 * in "from" register, while the callee is stored
1117		 * in "to" register.
1118		 * For example, there is a call stack
1119		 * "A"->"B"->"C"->"D".
1120		 * The LBR registers will be recorded like
1121		 * "C"->"D", "B"->"C", "A"->"B".
1122		 * So only the first "to" register and all "from"
1123		 * registers are needed to construct the whole stack.
1124		 */
1125		total_nr = i + 1 + lbr_stack->nr + 1;
1126		kernel_callchain_nr = i + 1;
1127
1128		printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
1129
1130		for (i = 0; i < kernel_callchain_nr; i++)
1131			printf("..... %2d: %016" PRIx64 "\n",
1132			       i, callchain->ips[i]);
1133
1134		printf("..... %2d: %016" PRIx64 "\n",
1135		       (int)(kernel_callchain_nr), entries[0].to);
1136		for (i = 0; i < lbr_stack->nr; i++)
1137			printf("..... %2d: %016" PRIx64 "\n",
1138			       (int)(i + kernel_callchain_nr + 1), entries[i].from);
1139	}
1140}
1141
1142static void callchain__printf(struct evsel *evsel,
1143			      struct perf_sample *sample)
1144{
1145	unsigned int i;
1146	struct ip_callchain *callchain = sample->callchain;
1147
1148	if (evsel__has_branch_callstack(evsel))
1149		callchain__lbr_callstack_printf(sample);
1150
1151	printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
1152
1153	for (i = 0; i < callchain->nr; i++)
1154		printf("..... %2d: %016" PRIx64 "\n",
1155		       i, callchain->ips[i]);
1156}
1157
1158static void branch_stack__printf(struct perf_sample *sample,
1159				 struct evsel *evsel)
1160{
1161	struct branch_entry *entries = perf_sample__branch_entries(sample);
1162	bool callstack = evsel__has_branch_callstack(evsel);
1163	u64 *branch_stack_cntr = sample->branch_stack_cntr;
1164	struct perf_env *env = evsel__env(evsel);
1165	uint64_t i;
1166
1167	if (!callstack) {
1168		printf("%s: nr:%" PRIu64 "\n", "... branch stack", sample->branch_stack->nr);
1169	} else {
1170		/* the reason of adding 1 to nr is because after expanding
1171		 * branch stack it generates nr + 1 callstack records. e.g.,
1172		 *         B()->C()
1173		 *         A()->B()
1174		 * the final callstack should be:
1175		 *         C()
1176		 *         B()
1177		 *         A()
1178		 */
1179		printf("%s: nr:%" PRIu64 "\n", "... branch callstack", sample->branch_stack->nr+1);
1180	}
1181
1182	for (i = 0; i < sample->branch_stack->nr; i++) {
1183		struct branch_entry *e = &entries[i];
1184
1185		if (!callstack) {
1186			printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x %s %s\n",
1187				i, e->from, e->to,
1188				(unsigned short)e->flags.cycles,
1189				e->flags.mispred ? "M" : " ",
1190				e->flags.predicted ? "P" : " ",
1191				e->flags.abort ? "A" : " ",
1192				e->flags.in_tx ? "T" : " ",
1193				(unsigned)e->flags.reserved,
1194				get_branch_type(e),
1195				e->flags.spec ? branch_spec_desc(e->flags.spec) : "");
1196		} else {
1197			if (i == 0) {
1198				printf("..... %2"PRIu64": %016" PRIx64 "\n"
1199				       "..... %2"PRIu64": %016" PRIx64 "\n",
1200						i, e->to, i+1, e->from);
1201			} else {
1202				printf("..... %2"PRIu64": %016" PRIx64 "\n", i+1, e->from);
1203			}
1204		}
1205	}
1206
1207	if (branch_stack_cntr) {
1208		printf("... branch stack counters: nr:%" PRIu64 " (counter width: %u max counter nr:%u)\n",
1209			sample->branch_stack->nr, env->br_cntr_width, env->br_cntr_nr);
1210		for (i = 0; i < sample->branch_stack->nr; i++)
1211			printf("..... %2"PRIu64": %016" PRIx64 "\n", i, branch_stack_cntr[i]);
1212	}
1213}
1214
1215static void regs_dump__printf(u64 mask, u64 *regs, const char *arch)
1216{
1217	unsigned rid, i = 0;
1218
1219	for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
1220		u64 val = regs[i++];
1221
1222		printf(".... %-5s 0x%016" PRIx64 "\n",
1223		       perf_reg_name(rid, arch), val);
1224	}
1225}
1226
1227static const char *regs_abi[] = {
1228	[PERF_SAMPLE_REGS_ABI_NONE] = "none",
1229	[PERF_SAMPLE_REGS_ABI_32] = "32-bit",
1230	[PERF_SAMPLE_REGS_ABI_64] = "64-bit",
1231};
1232
1233static inline const char *regs_dump_abi(struct regs_dump *d)
1234{
1235	if (d->abi > PERF_SAMPLE_REGS_ABI_64)
1236		return "unknown";
1237
1238	return regs_abi[d->abi];
1239}
1240
1241static void regs__printf(const char *type, struct regs_dump *regs, const char *arch)
1242{
1243	u64 mask = regs->mask;
1244
1245	printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
1246	       type,
1247	       mask,
1248	       regs_dump_abi(regs));
1249
1250	regs_dump__printf(mask, regs->regs, arch);
1251}
1252
1253static void regs_user__printf(struct perf_sample *sample, const char *arch)
1254{
1255	struct regs_dump *user_regs = &sample->user_regs;
1256
1257	if (user_regs->regs)
1258		regs__printf("user", user_regs, arch);
1259}
1260
1261static void regs_intr__printf(struct perf_sample *sample, const char *arch)
1262{
1263	struct regs_dump *intr_regs = &sample->intr_regs;
1264
1265	if (intr_regs->regs)
1266		regs__printf("intr", intr_regs, arch);
1267}
1268
1269static void stack_user__printf(struct stack_dump *dump)
1270{
1271	printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1272	       dump->size, dump->offset);
1273}
1274
1275static void evlist__print_tstamp(struct evlist *evlist, union perf_event *event, struct perf_sample *sample)
 
 
1276{
1277	u64 sample_type = __evlist__combined_sample_type(evlist);
1278
1279	if (event->header.type != PERF_RECORD_SAMPLE &&
1280	    !evlist__sample_id_all(evlist)) {
1281		fputs("-1 -1 ", stdout);
1282		return;
1283	}
1284
1285	if ((sample_type & PERF_SAMPLE_CPU))
1286		printf("%u ", sample->cpu);
1287
1288	if (sample_type & PERF_SAMPLE_TIME)
1289		printf("%" PRIu64 " ", sample->time);
1290}
1291
1292static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1293{
1294	printf("... sample_read:\n");
1295
1296	if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1297		printf("...... time enabled %016" PRIx64 "\n",
1298		       sample->read.time_enabled);
1299
1300	if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1301		printf("...... time running %016" PRIx64 "\n",
1302		       sample->read.time_running);
1303
1304	if (read_format & PERF_FORMAT_GROUP) {
1305		struct sample_read_value *value = sample->read.group.values;
1306
1307		printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1308
1309		sample_read_group__for_each(value, sample->read.group.nr, read_format) {
 
 
 
1310			printf("..... id %016" PRIx64
1311			       ", value %016" PRIx64,
1312			       value->id, value->value);
1313			if (read_format & PERF_FORMAT_LOST)
1314				printf(", lost %" PRIu64, value->lost);
1315			printf("\n");
1316		}
1317	} else {
1318		printf("..... id %016" PRIx64 ", value %016" PRIx64,
1319			sample->read.one.id, sample->read.one.value);
1320		if (read_format & PERF_FORMAT_LOST)
1321			printf(", lost %" PRIu64, sample->read.one.lost);
1322		printf("\n");
1323	}
1324}
1325
1326static void dump_event(struct evlist *evlist, union perf_event *event,
1327		       u64 file_offset, struct perf_sample *sample,
1328		       const char *file_path)
1329{
1330	if (!dump_trace)
1331		return;
1332
1333	printf("\n%#" PRIx64 "@%s [%#x]: event: %d\n",
1334	       file_offset, file_path, event->header.size, event->header.type);
1335
1336	trace_event(event);
1337	if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw)
1338		evlist->trace_event_sample_raw(evlist, event, sample);
1339
1340	if (sample)
1341		evlist__print_tstamp(evlist, event, sample);
1342
1343	printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1344	       event->header.size, perf_event__name(event->header.type));
1345}
1346
1347char *get_page_size_name(u64 size, char *str)
1348{
1349	if (!size || !unit_number__scnprintf(str, PAGE_SIZE_NAME_LEN, size))
1350		snprintf(str, PAGE_SIZE_NAME_LEN, "%s", "N/A");
1351
1352	return str;
1353}
1354
1355static void dump_sample(struct evsel *evsel, union perf_event *event,
1356			struct perf_sample *sample, const char *arch)
1357{
1358	u64 sample_type;
1359	char str[PAGE_SIZE_NAME_LEN];
1360
1361	if (!dump_trace)
1362		return;
1363
1364	printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1365	       event->header.misc, sample->pid, sample->tid, sample->ip,
1366	       sample->period, sample->addr);
1367
1368	sample_type = evsel->core.attr.sample_type;
1369
1370	if (evsel__has_callchain(evsel))
1371		callchain__printf(evsel, sample);
1372
1373	if (evsel__has_br_stack(evsel))
1374		branch_stack__printf(sample, evsel);
1375
1376	if (sample_type & PERF_SAMPLE_REGS_USER)
1377		regs_user__printf(sample, arch);
1378
1379	if (sample_type & PERF_SAMPLE_REGS_INTR)
1380		regs_intr__printf(sample, arch);
1381
1382	if (sample_type & PERF_SAMPLE_STACK_USER)
1383		stack_user__printf(&sample->user_stack);
1384
1385	if (sample_type & PERF_SAMPLE_WEIGHT_TYPE) {
1386		printf("... weight: %" PRIu64 "", sample->weight);
1387			if (sample_type & PERF_SAMPLE_WEIGHT_STRUCT) {
1388				printf(",0x%"PRIx16"", sample->ins_lat);
1389				printf(",0x%"PRIx16"", sample->p_stage_cyc);
1390			}
1391		printf("\n");
1392	}
1393
1394	if (sample_type & PERF_SAMPLE_DATA_SRC)
1395		printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1396
1397	if (sample_type & PERF_SAMPLE_PHYS_ADDR)
1398		printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
1399
1400	if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)
1401		printf(" .. data page size: %s\n", get_page_size_name(sample->data_page_size, str));
1402
1403	if (sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)
1404		printf(" .. code page size: %s\n", get_page_size_name(sample->code_page_size, str));
1405
1406	if (sample_type & PERF_SAMPLE_TRANSACTION)
1407		printf("... transaction: %" PRIx64 "\n", sample->transaction);
1408
1409	if (sample_type & PERF_SAMPLE_READ)
1410		sample_read__printf(sample, evsel->core.attr.read_format);
1411}
1412
1413static void dump_read(struct evsel *evsel, union perf_event *event)
1414{
1415	struct perf_record_read *read_event = &event->read;
1416	u64 read_format;
1417
1418	if (!dump_trace)
1419		return;
1420
1421	printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid,
1422	       evsel__name(evsel), event->read.value);
1423
1424	if (!evsel)
1425		return;
1426
1427	read_format = evsel->core.attr.read_format;
1428
1429	if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1430		printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled);
1431
1432	if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1433		printf("... time running : %" PRI_lu64 "\n", read_event->time_running);
1434
1435	if (read_format & PERF_FORMAT_ID)
1436		printf("... id           : %" PRI_lu64 "\n", read_event->id);
1437
1438	if (read_format & PERF_FORMAT_LOST)
1439		printf("... lost         : %" PRI_lu64 "\n", read_event->lost);
1440}
1441
1442static struct machine *machines__find_for_cpumode(struct machines *machines,
1443					       union perf_event *event,
1444					       struct perf_sample *sample)
1445{
 
 
1446	if (perf_guest &&
1447	    ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1448	     (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1449		u32 pid;
1450
1451		if (sample->machine_pid)
1452			pid = sample->machine_pid;
1453		else if (event->header.type == PERF_RECORD_MMAP
1454		    || event->header.type == PERF_RECORD_MMAP2)
1455			pid = event->mmap.pid;
1456		else
1457			pid = sample->pid;
1458
1459		/*
1460		 * Guest code machine is created as needed and does not use
1461		 * DEFAULT_GUEST_KERNEL_ID.
1462		 */
1463		if (symbol_conf.guest_code)
1464			return machines__findnew(machines, pid);
1465
1466		return machines__find_guest(machines, pid);
1467	}
1468
1469	return &machines->host;
1470}
1471
1472static int deliver_sample_value(struct evlist *evlist,
1473				struct perf_tool *tool,
1474				union perf_event *event,
1475				struct perf_sample *sample,
1476				struct sample_read_value *v,
1477				struct machine *machine)
1478{
1479	struct perf_sample_id *sid = evlist__id2sid(evlist, v->id);
1480	struct evsel *evsel;
1481
1482	if (sid) {
1483		sample->id     = v->id;
1484		sample->period = v->value - sid->period;
1485		sid->period    = v->value;
1486	}
1487
1488	if (!sid || sid->evsel == NULL) {
1489		++evlist->stats.nr_unknown_id;
1490		return 0;
1491	}
1492
1493	/*
1494	 * There's no reason to deliver sample
1495	 * for zero period, bail out.
1496	 */
1497	if (!sample->period)
1498		return 0;
1499
1500	evsel = container_of(sid->evsel, struct evsel, core);
1501	return tool->sample(tool, event, sample, evsel, machine);
1502}
1503
1504static int deliver_sample_group(struct evlist *evlist,
1505				struct perf_tool *tool,
1506				union  perf_event *event,
1507				struct perf_sample *sample,
1508				struct machine *machine,
1509				u64 read_format)
1510{
1511	int ret = -EINVAL;
1512	struct sample_read_value *v = sample->read.group.values;
1513
1514	sample_read_group__for_each(v, sample->read.group.nr, read_format) {
1515		ret = deliver_sample_value(evlist, tool, event, sample, v,
 
1516					   machine);
1517		if (ret)
1518			break;
1519	}
1520
1521	return ret;
1522}
1523
1524static int evlist__deliver_sample(struct evlist *evlist, struct perf_tool *tool,
1525				  union  perf_event *event, struct perf_sample *sample,
1526				  struct evsel *evsel, struct machine *machine)
 
 
 
 
1527{
1528	/* We know evsel != NULL. */
1529	u64 sample_type = evsel->core.attr.sample_type;
1530	u64 read_format = evsel->core.attr.read_format;
1531
1532	/* Standard sample delivery. */
1533	if (!(sample_type & PERF_SAMPLE_READ))
1534		return tool->sample(tool, event, sample, evsel, machine);
1535
1536	/* For PERF_SAMPLE_READ we have either single or group mode. */
1537	if (read_format & PERF_FORMAT_GROUP)
1538		return deliver_sample_group(evlist, tool, event, sample,
1539					    machine, read_format);
1540	else
1541		return deliver_sample_value(evlist, tool, event, sample,
1542					    &sample->read.one, machine);
1543}
1544
1545static int machines__deliver_event(struct machines *machines,
1546				   struct evlist *evlist,
1547				   union perf_event *event,
1548				   struct perf_sample *sample,
1549				   struct perf_tool *tool, u64 file_offset,
1550				   const char *file_path)
1551{
1552	struct evsel *evsel;
1553	struct machine *machine;
1554
1555	dump_event(evlist, event, file_offset, sample, file_path);
1556
1557	evsel = evlist__id2evsel(evlist, sample->id);
1558
1559	machine = machines__find_for_cpumode(machines, event, sample);
1560
1561	switch (event->header.type) {
1562	case PERF_RECORD_SAMPLE:
1563		if (evsel == NULL) {
1564			++evlist->stats.nr_unknown_id;
1565			return 0;
1566		}
 
1567		if (machine == NULL) {
1568			++evlist->stats.nr_unprocessable_samples;
1569			dump_sample(evsel, event, sample, perf_env__arch(NULL));
1570			return 0;
1571		}
1572		dump_sample(evsel, event, sample, perf_env__arch(machine->env));
1573		return evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1574	case PERF_RECORD_MMAP:
1575		return tool->mmap(tool, event, sample, machine);
1576	case PERF_RECORD_MMAP2:
1577		if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1578			++evlist->stats.nr_proc_map_timeout;
1579		return tool->mmap2(tool, event, sample, machine);
1580	case PERF_RECORD_COMM:
1581		return tool->comm(tool, event, sample, machine);
1582	case PERF_RECORD_NAMESPACES:
1583		return tool->namespaces(tool, event, sample, machine);
1584	case PERF_RECORD_CGROUP:
1585		return tool->cgroup(tool, event, sample, machine);
1586	case PERF_RECORD_FORK:
1587		return tool->fork(tool, event, sample, machine);
1588	case PERF_RECORD_EXIT:
1589		return tool->exit(tool, event, sample, machine);
1590	case PERF_RECORD_LOST:
1591		if (tool->lost == perf_event__process_lost)
1592			evlist->stats.total_lost += event->lost.lost;
1593		return tool->lost(tool, event, sample, machine);
1594	case PERF_RECORD_LOST_SAMPLES:
1595		if (tool->lost_samples == perf_event__process_lost_samples &&
1596		    !(event->header.misc & PERF_RECORD_MISC_LOST_SAMPLES_BPF))
1597			evlist->stats.total_lost_samples += event->lost_samples.lost;
1598		return tool->lost_samples(tool, event, sample, machine);
1599	case PERF_RECORD_READ:
1600		dump_read(evsel, event);
1601		return tool->read(tool, event, sample, evsel, machine);
1602	case PERF_RECORD_THROTTLE:
1603		return tool->throttle(tool, event, sample, machine);
1604	case PERF_RECORD_UNTHROTTLE:
1605		return tool->unthrottle(tool, event, sample, machine);
1606	case PERF_RECORD_AUX:
1607		if (tool->aux == perf_event__process_aux) {
1608			if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1609				evlist->stats.total_aux_lost += 1;
1610			if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1611				evlist->stats.total_aux_partial += 1;
1612			if (event->aux.flags & PERF_AUX_FLAG_COLLISION)
1613				evlist->stats.total_aux_collision += 1;
1614		}
1615		return tool->aux(tool, event, sample, machine);
1616	case PERF_RECORD_ITRACE_START:
1617		return tool->itrace_start(tool, event, sample, machine);
1618	case PERF_RECORD_SWITCH:
1619	case PERF_RECORD_SWITCH_CPU_WIDE:
1620		return tool->context_switch(tool, event, sample, machine);
1621	case PERF_RECORD_KSYMBOL:
1622		return tool->ksymbol(tool, event, sample, machine);
1623	case PERF_RECORD_BPF_EVENT:
1624		return tool->bpf(tool, event, sample, machine);
1625	case PERF_RECORD_TEXT_POKE:
1626		return tool->text_poke(tool, event, sample, machine);
1627	case PERF_RECORD_AUX_OUTPUT_HW_ID:
1628		return tool->aux_output_hw_id(tool, event, sample, machine);
1629	default:
1630		++evlist->stats.nr_unknown_events;
1631		return -1;
1632	}
1633}
1634
1635static int perf_session__deliver_event(struct perf_session *session,
1636				       union perf_event *event,
1637				       struct perf_tool *tool,
1638				       u64 file_offset,
1639				       const char *file_path)
1640{
1641	struct perf_sample sample;
1642	int ret = evlist__parse_sample(session->evlist, event, &sample);
1643
 
1644	if (ret) {
1645		pr_err("Can't parse sample, err = %d\n", ret);
1646		return ret;
1647	}
1648
1649	ret = auxtrace__process_event(session, event, &sample, tool);
1650	if (ret < 0)
1651		return ret;
1652	if (ret > 0)
1653		return 0;
1654
1655	ret = machines__deliver_event(&session->machines, session->evlist,
1656				      event, &sample, tool, file_offset, file_path);
1657
1658	if (dump_trace && sample.aux_sample.size)
1659		auxtrace__dump_auxtrace_sample(session, &sample);
1660
1661	return ret;
1662}
1663
1664static s64 perf_session__process_user_event(struct perf_session *session,
1665					    union perf_event *event,
1666					    u64 file_offset,
1667					    const char *file_path)
1668{
1669	struct ordered_events *oe = &session->ordered_events;
1670	struct perf_tool *tool = session->tool;
1671	struct perf_sample sample = { .time = 0, };
1672	int fd = perf_data__fd(session->data);
1673	int err;
1674
1675	if (event->header.type != PERF_RECORD_COMPRESSED ||
1676	    tool->compressed == perf_session__process_compressed_event_stub)
1677		dump_event(session->evlist, event, file_offset, &sample, file_path);
1678
1679	/* These events are processed right away */
1680	switch (event->header.type) {
1681	case PERF_RECORD_HEADER_ATTR:
1682		err = tool->attr(tool, event, &session->evlist);
1683		if (err == 0) {
1684			perf_session__set_id_hdr_size(session);
1685			perf_session__set_comm_exec(session);
1686		}
1687		return err;
1688	case PERF_RECORD_EVENT_UPDATE:
1689		return tool->event_update(tool, event, &session->evlist);
1690	case PERF_RECORD_HEADER_EVENT_TYPE:
1691		/*
1692		 * Deprecated, but we need to handle it for sake
1693		 * of old data files create in pipe mode.
1694		 */
1695		return 0;
1696	case PERF_RECORD_HEADER_TRACING_DATA:
1697		/*
1698		 * Setup for reading amidst mmap, but only when we
1699		 * are in 'file' mode. The 'pipe' fd is in proper
1700		 * place already.
1701		 */
1702		if (!perf_data__is_pipe(session->data))
1703			lseek(fd, file_offset, SEEK_SET);
1704		return tool->tracing_data(session, event);
1705	case PERF_RECORD_HEADER_BUILD_ID:
1706		return tool->build_id(session, event);
1707	case PERF_RECORD_FINISHED_ROUND:
1708		return tool->finished_round(tool, event, oe);
1709	case PERF_RECORD_ID_INDEX:
1710		return tool->id_index(session, event);
1711	case PERF_RECORD_AUXTRACE_INFO:
1712		return tool->auxtrace_info(session, event);
1713	case PERF_RECORD_AUXTRACE:
1714		/*
1715		 * Setup for reading amidst mmap, but only when we
1716		 * are in 'file' mode.  The 'pipe' fd is in proper
1717		 * place already.
1718		 */
1719		if (!perf_data__is_pipe(session->data))
1720			lseek(fd, file_offset + event->header.size, SEEK_SET);
1721		return tool->auxtrace(session, event);
1722	case PERF_RECORD_AUXTRACE_ERROR:
1723		perf_session__auxtrace_error_inc(session, event);
1724		return tool->auxtrace_error(session, event);
1725	case PERF_RECORD_THREAD_MAP:
1726		return tool->thread_map(session, event);
1727	case PERF_RECORD_CPU_MAP:
1728		return tool->cpu_map(session, event);
1729	case PERF_RECORD_STAT_CONFIG:
1730		return tool->stat_config(session, event);
1731	case PERF_RECORD_STAT:
1732		return tool->stat(session, event);
1733	case PERF_RECORD_STAT_ROUND:
1734		return tool->stat_round(session, event);
1735	case PERF_RECORD_TIME_CONV:
1736		session->time_conv = event->time_conv;
1737		return tool->time_conv(session, event);
1738	case PERF_RECORD_HEADER_FEATURE:
1739		return tool->feature(session, event);
1740	case PERF_RECORD_COMPRESSED:
1741		err = tool->compressed(session, event, file_offset, file_path);
1742		if (err)
1743			dump_event(session->evlist, event, file_offset, &sample, file_path);
1744		return err;
1745	case PERF_RECORD_FINISHED_INIT:
1746		return tool->finished_init(session, event);
1747	default:
1748		return -EINVAL;
1749	}
1750}
1751
1752int perf_session__deliver_synth_event(struct perf_session *session,
1753				      union perf_event *event,
1754				      struct perf_sample *sample)
1755{
1756	struct evlist *evlist = session->evlist;
1757	struct perf_tool *tool = session->tool;
1758
1759	events_stats__inc(&evlist->stats, event->header.type);
1760
1761	if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1762		return perf_session__process_user_event(session, event, 0, NULL);
1763
1764	return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0, NULL);
1765}
1766
1767static void event_swap(union perf_event *event, bool sample_id_all)
1768{
1769	perf_event__swap_op swap;
1770
1771	swap = perf_event__swap_ops[event->header.type];
1772	if (swap)
1773		swap(event, sample_id_all);
1774}
1775
1776int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1777			     void *buf, size_t buf_sz,
1778			     union perf_event **event_ptr,
1779			     struct perf_sample *sample)
1780{
1781	union perf_event *event;
1782	size_t hdr_sz, rest;
1783	int fd;
1784
1785	if (session->one_mmap && !session->header.needs_swap) {
1786		event = file_offset - session->one_mmap_offset +
1787			session->one_mmap_addr;
1788		goto out_parse_sample;
1789	}
1790
1791	if (perf_data__is_pipe(session->data))
1792		return -1;
1793
1794	fd = perf_data__fd(session->data);
1795	hdr_sz = sizeof(struct perf_event_header);
1796
1797	if (buf_sz < hdr_sz)
1798		return -1;
1799
1800	if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1801	    readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1802		return -1;
1803
1804	event = (union perf_event *)buf;
1805
1806	if (session->header.needs_swap)
1807		perf_event_header__bswap(&event->header);
1808
1809	if (event->header.size < hdr_sz || event->header.size > buf_sz)
1810		return -1;
1811
1812	buf += hdr_sz;
1813	rest = event->header.size - hdr_sz;
1814
1815	if (readn(fd, buf, rest) != (ssize_t)rest)
1816		return -1;
1817
1818	if (session->header.needs_swap)
1819		event_swap(event, evlist__sample_id_all(session->evlist));
1820
1821out_parse_sample:
1822
1823	if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1824	    evlist__parse_sample(session->evlist, event, sample))
1825		return -1;
1826
1827	*event_ptr = event;
1828
1829	return 0;
1830}
1831
1832int perf_session__peek_events(struct perf_session *session, u64 offset,
1833			      u64 size, peek_events_cb_t cb, void *data)
1834{
1835	u64 max_offset = offset + size;
1836	char buf[PERF_SAMPLE_MAX_SIZE];
1837	union perf_event *event;
1838	int err;
1839
1840	do {
1841		err = perf_session__peek_event(session, offset, buf,
1842					       PERF_SAMPLE_MAX_SIZE, &event,
1843					       NULL);
1844		if (err)
1845			return err;
1846
1847		err = cb(session, event, offset, data);
1848		if (err)
1849			return err;
1850
1851		offset += event->header.size;
1852		if (event->header.type == PERF_RECORD_AUXTRACE)
1853			offset += event->auxtrace.size;
1854
1855	} while (offset < max_offset);
1856
1857	return err;
1858}
1859
1860static s64 perf_session__process_event(struct perf_session *session,
1861				       union perf_event *event, u64 file_offset,
1862				       const char *file_path)
1863{
1864	struct evlist *evlist = session->evlist;
1865	struct perf_tool *tool = session->tool;
1866	int ret;
1867
1868	if (session->header.needs_swap)
1869		event_swap(event, evlist__sample_id_all(evlist));
1870
1871	if (event->header.type >= PERF_RECORD_HEADER_MAX)
1872		return -EINVAL;
1873
1874	events_stats__inc(&evlist->stats, event->header.type);
1875
1876	if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1877		return perf_session__process_user_event(session, event, file_offset, file_path);
1878
1879	if (tool->ordered_events) {
1880		u64 timestamp = -1ULL;
1881
1882		ret = evlist__parse_sample_timestamp(evlist, event, &timestamp);
1883		if (ret && ret != -1)
1884			return ret;
1885
1886		ret = perf_session__queue_event(session, event, timestamp, file_offset, file_path);
1887		if (ret != -ETIME)
1888			return ret;
1889	}
1890
1891	return perf_session__deliver_event(session, event, tool, file_offset, file_path);
1892}
1893
1894void perf_event_header__bswap(struct perf_event_header *hdr)
1895{
1896	hdr->type = bswap_32(hdr->type);
1897	hdr->misc = bswap_16(hdr->misc);
1898	hdr->size = bswap_16(hdr->size);
1899}
1900
1901struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1902{
1903	return machine__findnew_thread(&session->machines.host, -1, pid);
1904}
1905
 
 
 
 
 
 
 
1906int perf_session__register_idle_thread(struct perf_session *session)
1907{
1908	struct thread *thread = machine__idle_thread(&session->machines.host);
 
 
 
 
 
 
 
1909
1910	/* machine__idle_thread() got the thread, so put it */
 
 
 
 
 
1911	thread__put(thread);
1912	return thread ? 0 : -1;
1913}
1914
1915static void
1916perf_session__warn_order(const struct perf_session *session)
1917{
1918	const struct ordered_events *oe = &session->ordered_events;
1919	struct evsel *evsel;
1920	bool should_warn = true;
1921
1922	evlist__for_each_entry(session->evlist, evsel) {
1923		if (evsel->core.attr.write_backward)
1924			should_warn = false;
1925	}
1926
1927	if (!should_warn)
1928		return;
1929	if (oe->nr_unordered_events != 0)
1930		ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1931}
1932
1933static void perf_session__warn_about_errors(const struct perf_session *session)
1934{
1935	const struct events_stats *stats = &session->evlist->stats;
1936
1937	if (session->tool->lost == perf_event__process_lost &&
1938	    stats->nr_events[PERF_RECORD_LOST] != 0) {
1939		ui__warning("Processed %d events and lost %d chunks!\n\n"
1940			    "Check IO/CPU overload!\n\n",
1941			    stats->nr_events[0],
1942			    stats->nr_events[PERF_RECORD_LOST]);
1943	}
1944
1945	if (session->tool->lost_samples == perf_event__process_lost_samples) {
1946		double drop_rate;
1947
1948		drop_rate = (double)stats->total_lost_samples /
1949			    (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1950		if (drop_rate > 0.05) {
1951			ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n",
1952				    stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1953				    drop_rate * 100.0);
1954		}
1955	}
1956
1957	if (session->tool->aux == perf_event__process_aux &&
1958	    stats->total_aux_lost != 0) {
1959		ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1960			    stats->total_aux_lost,
1961			    stats->nr_events[PERF_RECORD_AUX]);
1962	}
1963
1964	if (session->tool->aux == perf_event__process_aux &&
1965	    stats->total_aux_partial != 0) {
1966		bool vmm_exclusive = false;
1967
1968		(void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1969		                       &vmm_exclusive);
1970
1971		ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1972		            "Are you running a KVM guest in the background?%s\n\n",
1973			    stats->total_aux_partial,
1974			    stats->nr_events[PERF_RECORD_AUX],
1975			    vmm_exclusive ?
1976			    "\nReloading kvm_intel module with vmm_exclusive=0\n"
1977			    "will reduce the gaps to only guest's timeslices." :
1978			    "");
1979	}
1980
1981	if (session->tool->aux == perf_event__process_aux &&
1982	    stats->total_aux_collision != 0) {
1983		ui__warning("AUX data detected collision  %" PRIu64 " times out of %u!\n\n",
1984			    stats->total_aux_collision,
1985			    stats->nr_events[PERF_RECORD_AUX]);
1986	}
1987
1988	if (stats->nr_unknown_events != 0) {
1989		ui__warning("Found %u unknown events!\n\n"
1990			    "Is this an older tool processing a perf.data "
1991			    "file generated by a more recent tool?\n\n"
1992			    "If that is not the case, consider "
1993			    "reporting to linux-kernel@vger.kernel.org.\n\n",
1994			    stats->nr_unknown_events);
1995	}
1996
1997	if (stats->nr_unknown_id != 0) {
1998		ui__warning("%u samples with id not present in the header\n",
1999			    stats->nr_unknown_id);
2000	}
2001
2002	if (stats->nr_invalid_chains != 0) {
2003		ui__warning("Found invalid callchains!\n\n"
2004			    "%u out of %u events were discarded for this reason.\n\n"
2005			    "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
2006			    stats->nr_invalid_chains,
2007			    stats->nr_events[PERF_RECORD_SAMPLE]);
2008	}
2009
2010	if (stats->nr_unprocessable_samples != 0) {
2011		ui__warning("%u unprocessable samples recorded.\n"
2012			    "Do you have a KVM guest running and not using 'perf kvm'?\n",
2013			    stats->nr_unprocessable_samples);
2014	}
2015
2016	perf_session__warn_order(session);
2017
2018	events_stats__auxtrace_error_warn(stats);
2019
2020	if (stats->nr_proc_map_timeout != 0) {
2021		ui__warning("%d map information files for pre-existing threads were\n"
2022			    "not processed, if there are samples for addresses they\n"
2023			    "will not be resolved, you may find out which are these\n"
2024			    "threads by running with -v and redirecting the output\n"
2025			    "to a file.\n"
2026			    "The time limit to process proc map is too short?\n"
2027			    "Increase it by --proc-map-timeout\n",
2028			    stats->nr_proc_map_timeout);
2029	}
2030}
2031
2032static int perf_session__flush_thread_stack(struct thread *thread,
2033					    void *p __maybe_unused)
2034{
2035	return thread_stack__flush(thread);
2036}
2037
2038static int perf_session__flush_thread_stacks(struct perf_session *session)
2039{
2040	return machines__for_each_thread(&session->machines,
2041					 perf_session__flush_thread_stack,
2042					 NULL);
2043}
2044
2045volatile sig_atomic_t session_done;
2046
2047static int __perf_session__process_decomp_events(struct perf_session *session);
2048
2049static int __perf_session__process_pipe_events(struct perf_session *session)
2050{
2051	struct ordered_events *oe = &session->ordered_events;
2052	struct perf_tool *tool = session->tool;
 
2053	union perf_event *event;
2054	uint32_t size, cur_size = 0;
2055	void *buf = NULL;
2056	s64 skip = 0;
2057	u64 head;
2058	ssize_t err;
2059	void *p;
2060
2061	perf_tool__fill_defaults(tool);
2062
2063	head = 0;
2064	cur_size = sizeof(union perf_event);
2065
2066	buf = malloc(cur_size);
2067	if (!buf)
2068		return -errno;
2069	ordered_events__set_copy_on_queue(oe, true);
2070more:
2071	event = buf;
2072	err = perf_data__read(session->data, event,
2073			      sizeof(struct perf_event_header));
2074	if (err <= 0) {
2075		if (err == 0)
2076			goto done;
2077
2078		pr_err("failed to read event header\n");
2079		goto out_err;
2080	}
2081
2082	if (session->header.needs_swap)
2083		perf_event_header__bswap(&event->header);
2084
2085	size = event->header.size;
2086	if (size < sizeof(struct perf_event_header)) {
2087		pr_err("bad event header size\n");
2088		goto out_err;
2089	}
2090
2091	if (size > cur_size) {
2092		void *new = realloc(buf, size);
2093		if (!new) {
2094			pr_err("failed to allocate memory to read event\n");
2095			goto out_err;
2096		}
2097		buf = new;
2098		cur_size = size;
2099		event = buf;
2100	}
2101	p = event;
2102	p += sizeof(struct perf_event_header);
2103
2104	if (size - sizeof(struct perf_event_header)) {
2105		err = perf_data__read(session->data, p,
2106				      size - sizeof(struct perf_event_header));
2107		if (err <= 0) {
2108			if (err == 0) {
2109				pr_err("unexpected end of event stream\n");
2110				goto done;
2111			}
2112
2113			pr_err("failed to read event data\n");
2114			goto out_err;
2115		}
2116	}
2117
2118	if ((skip = perf_session__process_event(session, event, head, "pipe")) < 0) {
2119		pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
2120		       head, event->header.size, event->header.type);
2121		err = -EINVAL;
2122		goto out_err;
2123	}
2124
2125	head += size;
2126
2127	if (skip > 0)
2128		head += skip;
2129
2130	err = __perf_session__process_decomp_events(session);
2131	if (err)
2132		goto out_err;
2133
2134	if (!session_done())
2135		goto more;
2136done:
2137	/* do the final flush for ordered samples */
2138	err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2139	if (err)
2140		goto out_err;
2141	err = auxtrace__flush_events(session, tool);
2142	if (err)
2143		goto out_err;
2144	err = perf_session__flush_thread_stacks(session);
2145out_err:
2146	free(buf);
2147	if (!tool->no_warn)
2148		perf_session__warn_about_errors(session);
2149	ordered_events__free(&session->ordered_events);
2150	auxtrace__free_events(session);
2151	return err;
2152}
2153
2154static union perf_event *
2155prefetch_event(char *buf, u64 head, size_t mmap_size,
2156	       bool needs_swap, union perf_event *error)
2157{
2158	union perf_event *event;
2159	u16 event_size;
2160
2161	/*
2162	 * Ensure we have enough space remaining to read
2163	 * the size of the event in the headers.
2164	 */
2165	if (head + sizeof(event->header) > mmap_size)
2166		return NULL;
2167
2168	event = (union perf_event *)(buf + head);
2169	if (needs_swap)
2170		perf_event_header__bswap(&event->header);
2171
2172	event_size = event->header.size;
2173	if (head + event_size <= mmap_size)
2174		return event;
2175
2176	/* We're not fetching the event so swap back again */
2177	if (needs_swap)
2178		perf_event_header__bswap(&event->header);
2179
2180	/* Check if the event fits into the next mmapped buf. */
2181	if (event_size <= mmap_size - head % page_size) {
2182		/* Remap buf and fetch again. */
2183		return NULL;
2184	}
2185
2186	/* Invalid input. Event size should never exceed mmap_size. */
2187	pr_debug("%s: head=%#" PRIx64 " event->header.size=%#x, mmap_size=%#zx:"
2188		 " fuzzed or compressed perf.data?\n", __func__, head, event_size, mmap_size);
2189
2190	return error;
2191}
2192
2193static union perf_event *
2194fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2195{
2196	return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL));
2197}
2198
2199static union perf_event *
2200fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2201{
2202	return prefetch_event(buf, head, mmap_size, needs_swap, NULL);
2203}
2204
2205static int __perf_session__process_decomp_events(struct perf_session *session)
2206{
2207	s64 skip;
2208	u64 size;
2209	struct decomp *decomp = session->active_decomp->decomp_last;
2210
2211	if (!decomp)
2212		return 0;
2213
2214	while (decomp->head < decomp->size && !session_done()) {
2215		union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data,
2216							     session->header.needs_swap);
2217
2218		if (!event)
2219			break;
2220
2221		size = event->header.size;
2222
2223		if (size < sizeof(struct perf_event_header) ||
2224		    (skip = perf_session__process_event(session, event, decomp->file_pos,
2225							decomp->file_path)) < 0) {
2226			pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
2227				decomp->file_pos + decomp->head, event->header.size, event->header.type);
2228			return -EINVAL;
2229		}
2230
2231		if (skip)
2232			size += skip;
2233
2234		decomp->head += size;
2235	}
2236
2237	return 0;
2238}
2239
2240/*
2241 * On 64bit we can mmap the data file in one go. No need for tiny mmap
2242 * slices. On 32bit we use 32MB.
2243 */
2244#if BITS_PER_LONG == 64
2245#define MMAP_SIZE ULLONG_MAX
2246#define NUM_MMAPS 1
2247#else
2248#define MMAP_SIZE (32 * 1024 * 1024ULL)
2249#define NUM_MMAPS 128
2250#endif
2251
2252struct reader;
2253
2254typedef s64 (*reader_cb_t)(struct perf_session *session,
2255			   union perf_event *event,
2256			   u64 file_offset,
2257			   const char *file_path);
2258
2259struct reader {
2260	int		 fd;
2261	const char	 *path;
2262	u64		 data_size;
2263	u64		 data_offset;
2264	reader_cb_t	 process;
2265	bool		 in_place_update;
2266	char		 *mmaps[NUM_MMAPS];
2267	size_t		 mmap_size;
2268	int		 mmap_idx;
2269	char		 *mmap_cur;
2270	u64		 file_pos;
2271	u64		 file_offset;
2272	u64		 head;
2273	u64		 size;
2274	bool		 done;
2275	struct zstd_data   zstd_data;
2276	struct decomp_data decomp_data;
2277};
2278
2279static int
2280reader__init(struct reader *rd, bool *one_mmap)
 
2281{
2282	u64 data_size = rd->data_size;
2283	char **mmaps = rd->mmaps;
2284
2285	rd->head = rd->data_offset;
2286	data_size += rd->data_offset;
2287
2288	rd->mmap_size = MMAP_SIZE;
2289	if (rd->mmap_size > data_size) {
2290		rd->mmap_size = data_size;
2291		if (one_mmap)
2292			*one_mmap = true;
2293	}
2294
2295	memset(mmaps, 0, sizeof(rd->mmaps));
 
 
2296
2297	if (zstd_init(&rd->zstd_data, 0))
2298		return -1;
2299	rd->decomp_data.zstd_decomp = &rd->zstd_data;
2300
2301	return 0;
2302}
2303
2304static void
2305reader__release_decomp(struct reader *rd)
2306{
2307	perf_decomp__release_events(rd->decomp_data.decomp);
2308	zstd_fini(&rd->zstd_data);
2309}
2310
2311static int
2312reader__mmap(struct reader *rd, struct perf_session *session)
2313{
2314	int mmap_prot, mmap_flags;
2315	char *buf, **mmaps = rd->mmaps;
2316	u64 page_offset;
2317
2318	mmap_prot  = PROT_READ;
2319	mmap_flags = MAP_SHARED;
2320
2321	if (rd->in_place_update) {
2322		mmap_prot  |= PROT_WRITE;
2323	} else if (session->header.needs_swap) {
2324		mmap_prot  |= PROT_WRITE;
2325		mmap_flags = MAP_PRIVATE;
2326	}
2327
2328	if (mmaps[rd->mmap_idx]) {
2329		munmap(mmaps[rd->mmap_idx], rd->mmap_size);
2330		mmaps[rd->mmap_idx] = NULL;
2331	}
2332
2333	page_offset = page_size * (rd->head / page_size);
2334	rd->file_offset += page_offset;
2335	rd->head -= page_offset;
2336
2337	buf = mmap(NULL, rd->mmap_size, mmap_prot, mmap_flags, rd->fd,
2338		   rd->file_offset);
2339	if (buf == MAP_FAILED) {
2340		pr_err("failed to mmap file\n");
2341		return -errno;
 
2342	}
2343	mmaps[rd->mmap_idx] = rd->mmap_cur = buf;
2344	rd->mmap_idx = (rd->mmap_idx + 1) & (ARRAY_SIZE(rd->mmaps) - 1);
2345	rd->file_pos = rd->file_offset + rd->head;
2346	if (session->one_mmap) {
2347		session->one_mmap_addr = buf;
2348		session->one_mmap_offset = rd->file_offset;
2349	}
2350
2351	return 0;
2352}
2353
2354enum {
2355	READER_OK,
2356	READER_NODATA,
2357};
2358
2359static int
2360reader__read_event(struct reader *rd, struct perf_session *session,
2361		   struct ui_progress *prog)
2362{
2363	u64 size;
2364	int err = READER_OK;
2365	union perf_event *event;
2366	s64 skip;
2367
2368	event = fetch_mmaped_event(rd->head, rd->mmap_size, rd->mmap_cur,
2369				   session->header.needs_swap);
2370	if (IS_ERR(event))
2371		return PTR_ERR(event);
2372
2373	if (!event)
2374		return READER_NODATA;
 
 
 
 
 
 
 
 
 
2375
2376	size = event->header.size;
2377
2378	skip = -EINVAL;
2379
2380	if (size < sizeof(struct perf_event_header) ||
2381	    (skip = rd->process(session, event, rd->file_pos, rd->path)) < 0) {
2382		pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n",
2383		       rd->file_offset + rd->head, event->header.size,
2384		       event->header.type, strerror(-skip));
2385		err = skip;
2386		goto out;
2387	}
2388
2389	if (skip)
2390		size += skip;
2391
2392	rd->size += size;
2393	rd->head += size;
2394	rd->file_pos += size;
2395
2396	err = __perf_session__process_decomp_events(session);
2397	if (err)
2398		goto out;
2399
2400	ui_progress__update(prog, size);
2401
2402out:
2403	return err;
2404}
2405
2406static inline bool
2407reader__eof(struct reader *rd)
2408{
2409	return (rd->file_pos >= rd->data_size + rd->data_offset);
2410}
2411
2412static int
2413reader__process_events(struct reader *rd, struct perf_session *session,
2414		       struct ui_progress *prog)
2415{
2416	int err;
2417
2418	err = reader__init(rd, &session->one_mmap);
2419	if (err)
2420		goto out;
2421
2422	session->active_decomp = &rd->decomp_data;
2423
2424remap:
2425	err = reader__mmap(rd, session);
2426	if (err)
2427		goto out;
2428
2429more:
2430	err = reader__read_event(rd, session, prog);
2431	if (err < 0)
2432		goto out;
2433	else if (err == READER_NODATA)
2434		goto remap;
2435
2436	if (session_done())
2437		goto out;
2438
2439	if (!reader__eof(rd))
2440		goto more;
2441
2442out:
2443	session->active_decomp = &session->decomp_data;
2444	return err;
2445}
2446
2447static s64 process_simple(struct perf_session *session,
2448			  union perf_event *event,
2449			  u64 file_offset,
2450			  const char *file_path)
2451{
2452	return perf_session__process_event(session, event, file_offset, file_path);
2453}
2454
2455static int __perf_session__process_events(struct perf_session *session)
2456{
2457	struct reader rd = {
2458		.fd		= perf_data__fd(session->data),
2459		.path		= session->data->file.path,
2460		.data_size	= session->header.data_size,
2461		.data_offset	= session->header.data_offset,
2462		.process	= process_simple,
2463		.in_place_update = session->data->in_place_update,
2464	};
2465	struct ordered_events *oe = &session->ordered_events;
2466	struct perf_tool *tool = session->tool;
2467	struct ui_progress prog;
2468	int err;
2469
2470	perf_tool__fill_defaults(tool);
2471
2472	if (rd.data_size == 0)
2473		return -1;
2474
2475	ui_progress__init_size(&prog, rd.data_size, "Processing events...");
2476
2477	err = reader__process_events(&rd, session, &prog);
2478	if (err)
2479		goto out_err;
2480	/* do the final flush for ordered samples */
2481	err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2482	if (err)
2483		goto out_err;
2484	err = auxtrace__flush_events(session, tool);
2485	if (err)
2486		goto out_err;
2487	err = perf_session__flush_thread_stacks(session);
2488out_err:
2489	ui_progress__finish();
2490	if (!tool->no_warn)
2491		perf_session__warn_about_errors(session);
2492	/*
2493	 * We may switching perf.data output, make ordered_events
2494	 * reusable.
2495	 */
2496	ordered_events__reinit(&session->ordered_events);
2497	auxtrace__free_events(session);
2498	reader__release_decomp(&rd);
2499	session->one_mmap = false;
2500	return err;
2501}
2502
2503/*
2504 * Processing 2 MB of data from each reader in sequence,
2505 * because that's the way the ordered events sorting works
2506 * most efficiently.
2507 */
2508#define READER_MAX_SIZE (2 * 1024 * 1024)
2509
2510/*
2511 * This function reads, merge and process directory data.
2512 * It assumens the version 1 of directory data, where each
2513 * data file holds per-cpu data, already sorted by kernel.
2514 */
2515static int __perf_session__process_dir_events(struct perf_session *session)
2516{
2517	struct perf_data *data = session->data;
2518	struct perf_tool *tool = session->tool;
2519	int i, ret, readers, nr_readers;
2520	struct ui_progress prog;
2521	u64 total_size = perf_data__size(session->data);
2522	struct reader *rd;
2523
2524	perf_tool__fill_defaults(tool);
2525
2526	ui_progress__init_size(&prog, total_size, "Sorting events...");
2527
2528	nr_readers = 1;
2529	for (i = 0; i < data->dir.nr; i++) {
2530		if (data->dir.files[i].size)
2531			nr_readers++;
2532	}
2533
2534	rd = zalloc(nr_readers * sizeof(struct reader));
2535	if (!rd)
2536		return -ENOMEM;
2537
2538	rd[0] = (struct reader) {
2539		.fd		 = perf_data__fd(session->data),
2540		.path		 = session->data->file.path,
2541		.data_size	 = session->header.data_size,
2542		.data_offset	 = session->header.data_offset,
2543		.process	 = process_simple,
2544		.in_place_update = session->data->in_place_update,
2545	};
2546	ret = reader__init(&rd[0], NULL);
2547	if (ret)
2548		goto out_err;
2549	ret = reader__mmap(&rd[0], session);
2550	if (ret)
2551		goto out_err;
2552	readers = 1;
2553
2554	for (i = 0; i < data->dir.nr; i++) {
2555		if (!data->dir.files[i].size)
2556			continue;
2557		rd[readers] = (struct reader) {
2558			.fd		 = data->dir.files[i].fd,
2559			.path		 = data->dir.files[i].path,
2560			.data_size	 = data->dir.files[i].size,
2561			.data_offset	 = 0,
2562			.process	 = process_simple,
2563			.in_place_update = session->data->in_place_update,
2564		};
2565		ret = reader__init(&rd[readers], NULL);
2566		if (ret)
2567			goto out_err;
2568		ret = reader__mmap(&rd[readers], session);
2569		if (ret)
2570			goto out_err;
2571		readers++;
2572	}
2573
2574	i = 0;
2575	while (readers) {
2576		if (session_done())
2577			break;
2578
2579		if (rd[i].done) {
2580			i = (i + 1) % nr_readers;
2581			continue;
2582		}
2583		if (reader__eof(&rd[i])) {
2584			rd[i].done = true;
2585			readers--;
2586			continue;
2587		}
2588
2589		session->active_decomp = &rd[i].decomp_data;
2590		ret = reader__read_event(&rd[i], session, &prog);
2591		if (ret < 0) {
2592			goto out_err;
2593		} else if (ret == READER_NODATA) {
2594			ret = reader__mmap(&rd[i], session);
2595			if (ret)
2596				goto out_err;
2597		}
2598
2599		if (rd[i].size >= READER_MAX_SIZE) {
2600			rd[i].size = 0;
2601			i = (i + 1) % nr_readers;
2602		}
2603	}
2604
2605	ret = ordered_events__flush(&session->ordered_events, OE_FLUSH__FINAL);
2606	if (ret)
2607		goto out_err;
2608
2609	ret = perf_session__flush_thread_stacks(session);
2610out_err:
2611	ui_progress__finish();
2612
2613	if (!tool->no_warn)
2614		perf_session__warn_about_errors(session);
2615
2616	/*
2617	 * We may switching perf.data output, make ordered_events
2618	 * reusable.
2619	 */
2620	ordered_events__reinit(&session->ordered_events);
2621
2622	session->one_mmap = false;
2623
2624	session->active_decomp = &session->decomp_data;
2625	for (i = 0; i < nr_readers; i++)
2626		reader__release_decomp(&rd[i]);
2627	zfree(&rd);
2628
2629	return ret;
2630}
2631
2632int perf_session__process_events(struct perf_session *session)
2633{
2634	if (perf_session__register_idle_thread(session) < 0)
2635		return -ENOMEM;
2636
2637	if (perf_data__is_pipe(session->data))
2638		return __perf_session__process_pipe_events(session);
2639
2640	if (perf_data__is_dir(session->data) && session->data->dir.nr)
2641		return __perf_session__process_dir_events(session);
2642
2643	return __perf_session__process_events(session);
2644}
2645
2646bool perf_session__has_traces(struct perf_session *session, const char *msg)
2647{
2648	struct evsel *evsel;
2649
2650	evlist__for_each_entry(session->evlist, evsel) {
2651		if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT)
2652			return true;
2653	}
2654
2655	pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
2656	return false;
2657}
2658
2659int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr)
2660{
2661	char *bracket;
2662	struct ref_reloc_sym *ref;
2663	struct kmap *kmap;
2664
2665	ref = zalloc(sizeof(struct ref_reloc_sym));
2666	if (ref == NULL)
2667		return -ENOMEM;
2668
2669	ref->name = strdup(symbol_name);
2670	if (ref->name == NULL) {
2671		free(ref);
2672		return -ENOMEM;
2673	}
2674
2675	bracket = strchr(ref->name, ']');
2676	if (bracket)
2677		*bracket = '\0';
2678
2679	ref->addr = addr;
2680
2681	kmap = map__kmap(map);
2682	if (kmap)
2683		kmap->ref_reloc_sym = ref;
2684
2685	return 0;
2686}
2687
2688size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
2689{
2690	return machines__fprintf_dsos(&session->machines, fp);
2691}
2692
2693size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
2694					  bool (skip)(struct dso *dso, int parm), int parm)
2695{
2696	return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
2697}
2698
2699size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp,
2700				       bool skip_empty)
2701{
2702	size_t ret;
2703	const char *msg = "";
2704
2705	if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
2706		msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
2707
2708	ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
2709
2710	ret += events_stats__fprintf(&session->evlist->stats, fp, skip_empty);
2711	return ret;
2712}
2713
2714size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2715{
2716	/*
2717	 * FIXME: Here we have to actually print all the machines in this
2718	 * session, not just the host...
2719	 */
2720	return machine__fprintf(&session->machines.host, fp);
2721}
2722
2723struct evsel *perf_session__find_first_evtype(struct perf_session *session,
2724					      unsigned int type)
2725{
2726	struct evsel *pos;
2727
2728	evlist__for_each_entry(session->evlist, pos) {
2729		if (pos->core.attr.type == type)
2730			return pos;
2731	}
2732	return NULL;
2733}
2734
2735int perf_session__cpu_bitmap(struct perf_session *session,
2736			     const char *cpu_list, unsigned long *cpu_bitmap)
2737{
2738	int i, err = -1;
2739	struct perf_cpu_map *map;
2740	int nr_cpus = min(session->header.env.nr_cpus_avail, MAX_NR_CPUS);
2741
2742	for (i = 0; i < PERF_TYPE_MAX; ++i) {
2743		struct evsel *evsel;
2744
2745		evsel = perf_session__find_first_evtype(session, i);
2746		if (!evsel)
2747			continue;
2748
2749		if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) {
2750			pr_err("File does not contain CPU events. "
2751			       "Remove -C option to proceed.\n");
2752			return -1;
2753		}
2754	}
2755
2756	map = perf_cpu_map__new(cpu_list);
2757	if (map == NULL) {
2758		pr_err("Invalid cpu_list\n");
2759		return -1;
2760	}
2761
2762	for (i = 0; i < perf_cpu_map__nr(map); i++) {
2763		struct perf_cpu cpu = perf_cpu_map__cpu(map, i);
2764
2765		if (cpu.cpu >= nr_cpus) {
2766			pr_err("Requested CPU %d too large. "
2767			       "Consider raising MAX_NR_CPUS\n", cpu.cpu);
2768			goto out_delete_map;
2769		}
2770
2771		__set_bit(cpu.cpu, cpu_bitmap);
2772	}
2773
2774	err = 0;
2775
2776out_delete_map:
2777	perf_cpu_map__put(map);
2778	return err;
2779}
2780
2781void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2782				bool full)
2783{
2784	if (session == NULL || fp == NULL)
2785		return;
2786
2787	fprintf(fp, "# ========\n");
2788	perf_header__fprintf_info(session, fp, full);
2789	fprintf(fp, "# ========\n#\n");
2790}
2791
2792static int perf_session__register_guest(struct perf_session *session, pid_t machine_pid)
2793{
2794	struct machine *machine = machines__findnew(&session->machines, machine_pid);
2795	struct thread *thread;
2796
2797	if (!machine)
2798		return -ENOMEM;
2799
2800	machine->single_address_space = session->machines.host.single_address_space;
2801
2802	thread = machine__idle_thread(machine);
2803	if (!thread)
2804		return -ENOMEM;
2805	thread__put(thread);
2806
2807	machine->kallsyms_filename = perf_data__guest_kallsyms_name(session->data, machine_pid);
2808
2809	return 0;
2810}
2811
2812static int perf_session__set_guest_cpu(struct perf_session *session, pid_t pid,
2813				       pid_t tid, int guest_cpu)
2814{
2815	struct machine *machine = &session->machines.host;
2816	struct thread *thread = machine__findnew_thread(machine, pid, tid);
2817
2818	if (!thread)
2819		return -ENOMEM;
2820	thread__set_guest_cpu(thread, guest_cpu);
2821	thread__put(thread);
2822
2823	return 0;
2824}
2825
2826int perf_event__process_id_index(struct perf_session *session,
2827				 union perf_event *event)
2828{
2829	struct evlist *evlist = session->evlist;
2830	struct perf_record_id_index *ie = &event->id_index;
2831	size_t sz = ie->header.size - sizeof(*ie);
2832	size_t i, nr, max_nr;
2833	size_t e1_sz = sizeof(struct id_index_entry);
2834	size_t e2_sz = sizeof(struct id_index_entry_2);
2835	size_t etot_sz = e1_sz + e2_sz;
2836	struct id_index_entry_2 *e2;
2837	pid_t last_pid = 0;
2838
2839	max_nr = sz / e1_sz;
 
2840	nr = ie->nr;
2841	if (nr > max_nr) {
2842		printf("Too big: nr %zu max_nr %zu\n", nr, max_nr);
2843		return -EINVAL;
2844	}
2845
2846	if (sz >= nr * etot_sz) {
2847		max_nr = sz / etot_sz;
2848		if (nr > max_nr) {
2849			printf("Too big2: nr %zu max_nr %zu\n", nr, max_nr);
2850			return -EINVAL;
2851		}
2852		e2 = (void *)ie + sizeof(*ie) + nr * e1_sz;
2853	} else {
2854		e2 = NULL;
2855	}
2856
2857	if (dump_trace)
2858		fprintf(stdout, " nr: %zu\n", nr);
2859
2860	for (i = 0; i < nr; i++, (e2 ? e2++ : 0)) {
2861		struct id_index_entry *e = &ie->entries[i];
2862		struct perf_sample_id *sid;
2863		int ret;
2864
2865		if (dump_trace) {
2866			fprintf(stdout,	" ... id: %"PRI_lu64, e->id);
2867			fprintf(stdout,	"  idx: %"PRI_lu64, e->idx);
2868			fprintf(stdout,	"  cpu: %"PRI_ld64, e->cpu);
2869			fprintf(stdout, "  tid: %"PRI_ld64, e->tid);
2870			if (e2) {
2871				fprintf(stdout, "  machine_pid: %"PRI_ld64, e2->machine_pid);
2872				fprintf(stdout, "  vcpu: %"PRI_lu64"\n", e2->vcpu);
2873			} else {
2874				fprintf(stdout, "\n");
2875			}
2876		}
2877
2878		sid = evlist__id2sid(evlist, e->id);
2879		if (!sid)
2880			return -ENOENT;
2881
2882		sid->idx = e->idx;
2883		sid->cpu.cpu = e->cpu;
2884		sid->tid = e->tid;
2885
2886		if (!e2)
2887			continue;
2888
2889		sid->machine_pid = e2->machine_pid;
2890		sid->vcpu.cpu = e2->vcpu;
2891
2892		if (!sid->machine_pid)
2893			continue;
2894
2895		if (sid->machine_pid != last_pid) {
2896			ret = perf_session__register_guest(session, sid->machine_pid);
2897			if (ret)
2898				return ret;
2899			last_pid = sid->machine_pid;
2900			perf_guest = true;
2901		}
2902
2903		ret = perf_session__set_guest_cpu(session, sid->machine_pid, e->tid, e2->vcpu);
2904		if (ret)
2905			return ret;
2906	}
2907	return 0;
2908}
v5.9
   1// SPDX-License-Identifier: GPL-2.0
   2#include <errno.h>
 
   3#include <inttypes.h>
   4#include <linux/err.h>
   5#include <linux/kernel.h>
   6#include <linux/zalloc.h>
   7#include <api/fs/fs.h>
   8
   9#include <byteswap.h>
  10#include <unistd.h>
  11#include <sys/types.h>
  12#include <sys/mman.h>
  13#include <perf/cpumap.h>
  14
  15#include "map_symbol.h"
  16#include "branch.h"
  17#include "debug.h"
 
  18#include "evlist.h"
  19#include "evsel.h"
  20#include "memswap.h"
  21#include "map.h"
  22#include "symbol.h"
  23#include "session.h"
  24#include "tool.h"
  25#include "perf_regs.h"
  26#include "asm/bug.h"
  27#include "auxtrace.h"
  28#include "thread.h"
  29#include "thread-stack.h"
  30#include "sample-raw.h"
  31#include "stat.h"
 
  32#include "ui/progress.h"
  33#include "../perf.h"
  34#include "arch/common.h"
 
  35#include <internal/lib.h>
  36
  37#ifdef HAVE_ZSTD_SUPPORT
  38static int perf_session__process_compressed_event(struct perf_session *session,
  39						  union perf_event *event, u64 file_offset)
 
  40{
  41	void *src;
  42	size_t decomp_size, src_size;
  43	u64 decomp_last_rem = 0;
  44	size_t mmap_len, decomp_len = session->header.env.comp_mmap_len;
  45	struct decomp *decomp, *decomp_last = session->decomp_last;
  46
  47	if (decomp_last) {
  48		decomp_last_rem = decomp_last->size - decomp_last->head;
  49		decomp_len += decomp_last_rem;
  50	}
  51
  52	mmap_len = sizeof(struct decomp) + decomp_len;
  53	decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE,
  54		      MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
  55	if (decomp == MAP_FAILED) {
  56		pr_err("Couldn't allocate memory for decompression\n");
  57		return -1;
  58	}
  59
  60	decomp->file_pos = file_offset;
 
  61	decomp->mmap_len = mmap_len;
  62	decomp->head = 0;
  63
  64	if (decomp_last_rem) {
  65		memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem);
  66		decomp->size = decomp_last_rem;
  67	}
  68
  69	src = (void *)event + sizeof(struct perf_record_compressed);
  70	src_size = event->pack.header.size - sizeof(struct perf_record_compressed);
  71
  72	decomp_size = zstd_decompress_stream(&(session->zstd_data), src, src_size,
  73				&(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem);
  74	if (!decomp_size) {
  75		munmap(decomp, mmap_len);
  76		pr_err("Couldn't decompress data\n");
  77		return -1;
  78	}
  79
  80	decomp->size += decomp_size;
  81
  82	if (session->decomp == NULL) {
  83		session->decomp = decomp;
  84		session->decomp_last = decomp;
  85	} else {
  86		session->decomp_last->next = decomp;
  87		session->decomp_last = decomp;
  88	}
  89
  90	pr_debug("decomp (B): %zd to %zd\n", src_size, decomp_size);
  91
  92	return 0;
  93}
  94#else /* !HAVE_ZSTD_SUPPORT */
  95#define perf_session__process_compressed_event perf_session__process_compressed_event_stub
  96#endif
  97
  98static int perf_session__deliver_event(struct perf_session *session,
  99				       union perf_event *event,
 100				       struct perf_tool *tool,
 101				       u64 file_offset);
 
 102
 103static int perf_session__open(struct perf_session *session)
 104{
 105	struct perf_data *data = session->data;
 106
 107	if (perf_session__read_header(session) < 0) {
 108		pr_err("incompatible file format (rerun with -v to learn more)\n");
 109		return -1;
 110	}
 111
 
 
 
 
 
 112	if (perf_data__is_pipe(data))
 113		return 0;
 114
 115	if (perf_header__has_feat(&session->header, HEADER_STAT))
 116		return 0;
 117
 118	if (!evlist__valid_sample_type(session->evlist)) {
 119		pr_err("non matching sample_type\n");
 120		return -1;
 121	}
 122
 123	if (!evlist__valid_sample_id_all(session->evlist)) {
 124		pr_err("non matching sample_id_all\n");
 125		return -1;
 126	}
 127
 128	if (!perf_evlist__valid_read_format(session->evlist)) {
 129		pr_err("non matching read_format\n");
 130		return -1;
 131	}
 132
 133	return 0;
 134}
 135
 136void perf_session__set_id_hdr_size(struct perf_session *session)
 137{
 138	u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
 139
 140	machines__set_id_hdr_size(&session->machines, id_hdr_size);
 141}
 142
 143int perf_session__create_kernel_maps(struct perf_session *session)
 144{
 145	int ret = machine__create_kernel_maps(&session->machines.host);
 146
 147	if (ret >= 0)
 148		ret = machines__create_guest_kernel_maps(&session->machines);
 149	return ret;
 150}
 151
 152static void perf_session__destroy_kernel_maps(struct perf_session *session)
 153{
 154	machines__destroy_kernel_maps(&session->machines);
 155}
 156
 157static bool perf_session__has_comm_exec(struct perf_session *session)
 158{
 159	struct evsel *evsel;
 160
 161	evlist__for_each_entry(session->evlist, evsel) {
 162		if (evsel->core.attr.comm_exec)
 163			return true;
 164	}
 165
 166	return false;
 167}
 168
 169static void perf_session__set_comm_exec(struct perf_session *session)
 170{
 171	bool comm_exec = perf_session__has_comm_exec(session);
 172
 173	machines__set_comm_exec(&session->machines, comm_exec);
 174}
 175
 176static int ordered_events__deliver_event(struct ordered_events *oe,
 177					 struct ordered_event *event)
 178{
 179	struct perf_session *session = container_of(oe, struct perf_session,
 180						    ordered_events);
 181
 182	return perf_session__deliver_event(session, event->event,
 183					   session->tool, event->file_offset);
 
 184}
 185
 186struct perf_session *perf_session__new(struct perf_data *data,
 187				       bool repipe, struct perf_tool *tool)
 
 188{
 189	int ret = -ENOMEM;
 190	struct perf_session *session = zalloc(sizeof(*session));
 191
 192	if (!session)
 193		goto out;
 194
 195	session->repipe = repipe;
 196	session->tool   = tool;
 
 
 197	INIT_LIST_HEAD(&session->auxtrace_index);
 198	machines__init(&session->machines);
 199	ordered_events__init(&session->ordered_events,
 200			     ordered_events__deliver_event, NULL);
 201
 202	perf_env__init(&session->header.env);
 203	if (data) {
 204		ret = perf_data__open(data);
 205		if (ret < 0)
 206			goto out_delete;
 207
 208		session->data = data;
 209
 210		if (perf_data__is_read(data)) {
 211			ret = perf_session__open(session);
 212			if (ret < 0)
 213				goto out_delete;
 214
 215			/*
 216			 * set session attributes that are present in perf.data
 217			 * but not in pipe-mode.
 218			 */
 219			if (!data->is_pipe) {
 220				perf_session__set_id_hdr_size(session);
 221				perf_session__set_comm_exec(session);
 222			}
 223
 224			perf_evlist__init_trace_event_sample_raw(session->evlist);
 225
 226			/* Open the directory data. */
 227			if (data->is_dir) {
 228				ret = perf_data__open_dir(data);
 229				if (ret)
 230					goto out_delete;
 231			}
 232
 233			if (!symbol_conf.kallsyms_name &&
 234			    !symbol_conf.vmlinux_name)
 235				symbol_conf.kallsyms_name = perf_data__kallsyms_name(data);
 236		}
 237	} else  {
 238		session->machines.host.env = &perf_env;
 239	}
 240
 241	session->machines.host.single_address_space =
 242		perf_env__single_address_space(session->machines.host.env);
 243
 244	if (!data || perf_data__is_write(data)) {
 245		/*
 246		 * In O_RDONLY mode this will be performed when reading the
 247		 * kernel MMAP event, in perf_event__process_mmap().
 248		 */
 249		if (perf_session__create_kernel_maps(session) < 0)
 250			pr_warning("Cannot read kernel map\n");
 251	}
 252
 253	/*
 254	 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
 255	 * processed, so evlist__sample_id_all is not meaningful here.
 256	 */
 257	if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps &&
 258	    tool->ordered_events && !evlist__sample_id_all(session->evlist)) {
 259		dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
 260		tool->ordered_events = false;
 261	}
 262
 263	return session;
 264
 265 out_delete:
 266	perf_session__delete(session);
 267 out:
 268	return ERR_PTR(ret);
 269}
 270
 271static void perf_session__delete_threads(struct perf_session *session)
 272{
 273	machine__delete_threads(&session->machines.host);
 274}
 275
 276static void perf_session__release_decomp_events(struct perf_session *session)
 277{
 278	struct decomp *next, *decomp;
 279	size_t mmap_len;
 280	next = session->decomp;
 281	do {
 282		decomp = next;
 283		if (decomp == NULL)
 284			break;
 285		next = decomp->next;
 286		mmap_len = decomp->mmap_len;
 287		munmap(decomp, mmap_len);
 288	} while (1);
 289}
 290
 291void perf_session__delete(struct perf_session *session)
 292{
 293	if (session == NULL)
 294		return;
 295	auxtrace__free(session);
 296	auxtrace_index__free(&session->auxtrace_index);
 297	perf_session__destroy_kernel_maps(session);
 298	perf_session__delete_threads(session);
 299	perf_session__release_decomp_events(session);
 300	perf_env__exit(&session->header.env);
 301	machines__exit(&session->machines);
 302	if (session->data)
 
 
 303		perf_data__close(session->data);
 
 
 
 
 304	free(session);
 305}
 306
 307static int process_event_synth_tracing_data_stub(struct perf_session *session
 308						 __maybe_unused,
 309						 union perf_event *event
 310						 __maybe_unused)
 311{
 312	dump_printf(": unhandled!\n");
 313	return 0;
 314}
 315
 316static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
 317					 union perf_event *event __maybe_unused,
 318					 struct evlist **pevlist
 319					 __maybe_unused)
 320{
 321	dump_printf(": unhandled!\n");
 322	return 0;
 323}
 324
 325static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
 326						 union perf_event *event __maybe_unused,
 327						 struct evlist **pevlist
 328						 __maybe_unused)
 329{
 330	if (dump_trace)
 331		perf_event__fprintf_event_update(event, stdout);
 332
 333	dump_printf(": unhandled!\n");
 334	return 0;
 335}
 336
 337static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
 338				     union perf_event *event __maybe_unused,
 339				     struct perf_sample *sample __maybe_unused,
 340				     struct evsel *evsel __maybe_unused,
 341				     struct machine *machine __maybe_unused)
 342{
 343	dump_printf(": unhandled!\n");
 344	return 0;
 345}
 346
 347static int process_event_stub(struct perf_tool *tool __maybe_unused,
 348			      union perf_event *event __maybe_unused,
 349			      struct perf_sample *sample __maybe_unused,
 350			      struct machine *machine __maybe_unused)
 351{
 352	dump_printf(": unhandled!\n");
 353	return 0;
 354}
 355
 356static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
 357				       union perf_event *event __maybe_unused,
 358				       struct ordered_events *oe __maybe_unused)
 359{
 360	dump_printf(": unhandled!\n");
 361	return 0;
 362}
 363
 364static int process_finished_round(struct perf_tool *tool,
 365				  union perf_event *event,
 366				  struct ordered_events *oe);
 367
 368static int skipn(int fd, off_t n)
 369{
 370	char buf[4096];
 371	ssize_t ret;
 372
 373	while (n > 0) {
 374		ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
 375		if (ret <= 0)
 376			return ret;
 377		n -= ret;
 378	}
 379
 380	return 0;
 381}
 382
 383static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused,
 384				       union perf_event *event)
 385{
 386	dump_printf(": unhandled!\n");
 387	if (perf_data__is_pipe(session->data))
 388		skipn(perf_data__fd(session->data), event->auxtrace.size);
 389	return event->auxtrace.size;
 390}
 391
 392static int process_event_op2_stub(struct perf_session *session __maybe_unused,
 393				  union perf_event *event __maybe_unused)
 394{
 395	dump_printf(": unhandled!\n");
 396	return 0;
 397}
 398
 399
 400static
 401int process_event_thread_map_stub(struct perf_session *session __maybe_unused,
 402				  union perf_event *event __maybe_unused)
 403{
 404	if (dump_trace)
 405		perf_event__fprintf_thread_map(event, stdout);
 406
 407	dump_printf(": unhandled!\n");
 408	return 0;
 409}
 410
 411static
 412int process_event_cpu_map_stub(struct perf_session *session __maybe_unused,
 413			       union perf_event *event __maybe_unused)
 414{
 415	if (dump_trace)
 416		perf_event__fprintf_cpu_map(event, stdout);
 417
 418	dump_printf(": unhandled!\n");
 419	return 0;
 420}
 421
 422static
 423int process_event_stat_config_stub(struct perf_session *session __maybe_unused,
 424				   union perf_event *event __maybe_unused)
 425{
 426	if (dump_trace)
 427		perf_event__fprintf_stat_config(event, stdout);
 428
 429	dump_printf(": unhandled!\n");
 430	return 0;
 431}
 432
 433static int process_stat_stub(struct perf_session *perf_session __maybe_unused,
 434			     union perf_event *event)
 435{
 436	if (dump_trace)
 437		perf_event__fprintf_stat(event, stdout);
 438
 439	dump_printf(": unhandled!\n");
 440	return 0;
 441}
 442
 443static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused,
 444				   union perf_event *event)
 445{
 446	if (dump_trace)
 447		perf_event__fprintf_stat_round(event, stdout);
 448
 449	dump_printf(": unhandled!\n");
 450	return 0;
 451}
 452
 
 
 
 
 
 
 
 
 
 
 453static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused,
 454						       union perf_event *event __maybe_unused,
 455						       u64 file_offset __maybe_unused)
 
 456{
 457       dump_printf(": unhandled!\n");
 458       return 0;
 459}
 460
 461void perf_tool__fill_defaults(struct perf_tool *tool)
 462{
 463	if (tool->sample == NULL)
 464		tool->sample = process_event_sample_stub;
 465	if (tool->mmap == NULL)
 466		tool->mmap = process_event_stub;
 467	if (tool->mmap2 == NULL)
 468		tool->mmap2 = process_event_stub;
 469	if (tool->comm == NULL)
 470		tool->comm = process_event_stub;
 471	if (tool->namespaces == NULL)
 472		tool->namespaces = process_event_stub;
 473	if (tool->cgroup == NULL)
 474		tool->cgroup = process_event_stub;
 475	if (tool->fork == NULL)
 476		tool->fork = process_event_stub;
 477	if (tool->exit == NULL)
 478		tool->exit = process_event_stub;
 479	if (tool->lost == NULL)
 480		tool->lost = perf_event__process_lost;
 481	if (tool->lost_samples == NULL)
 482		tool->lost_samples = perf_event__process_lost_samples;
 483	if (tool->aux == NULL)
 484		tool->aux = perf_event__process_aux;
 485	if (tool->itrace_start == NULL)
 486		tool->itrace_start = perf_event__process_itrace_start;
 487	if (tool->context_switch == NULL)
 488		tool->context_switch = perf_event__process_switch;
 489	if (tool->ksymbol == NULL)
 490		tool->ksymbol = perf_event__process_ksymbol;
 491	if (tool->bpf == NULL)
 492		tool->bpf = perf_event__process_bpf;
 493	if (tool->text_poke == NULL)
 494		tool->text_poke = perf_event__process_text_poke;
 
 
 495	if (tool->read == NULL)
 496		tool->read = process_event_sample_stub;
 497	if (tool->throttle == NULL)
 498		tool->throttle = process_event_stub;
 499	if (tool->unthrottle == NULL)
 500		tool->unthrottle = process_event_stub;
 501	if (tool->attr == NULL)
 502		tool->attr = process_event_synth_attr_stub;
 503	if (tool->event_update == NULL)
 504		tool->event_update = process_event_synth_event_update_stub;
 505	if (tool->tracing_data == NULL)
 506		tool->tracing_data = process_event_synth_tracing_data_stub;
 507	if (tool->build_id == NULL)
 508		tool->build_id = process_event_op2_stub;
 509	if (tool->finished_round == NULL) {
 510		if (tool->ordered_events)
 511			tool->finished_round = process_finished_round;
 512		else
 513			tool->finished_round = process_finished_round_stub;
 514	}
 515	if (tool->id_index == NULL)
 516		tool->id_index = process_event_op2_stub;
 517	if (tool->auxtrace_info == NULL)
 518		tool->auxtrace_info = process_event_op2_stub;
 519	if (tool->auxtrace == NULL)
 520		tool->auxtrace = process_event_auxtrace_stub;
 521	if (tool->auxtrace_error == NULL)
 522		tool->auxtrace_error = process_event_op2_stub;
 523	if (tool->thread_map == NULL)
 524		tool->thread_map = process_event_thread_map_stub;
 525	if (tool->cpu_map == NULL)
 526		tool->cpu_map = process_event_cpu_map_stub;
 527	if (tool->stat_config == NULL)
 528		tool->stat_config = process_event_stat_config_stub;
 529	if (tool->stat == NULL)
 530		tool->stat = process_stat_stub;
 531	if (tool->stat_round == NULL)
 532		tool->stat_round = process_stat_round_stub;
 533	if (tool->time_conv == NULL)
 534		tool->time_conv = process_event_op2_stub;
 535	if (tool->feature == NULL)
 536		tool->feature = process_event_op2_stub;
 537	if (tool->compressed == NULL)
 538		tool->compressed = perf_session__process_compressed_event;
 
 
 539}
 540
 541static void swap_sample_id_all(union perf_event *event, void *data)
 542{
 543	void *end = (void *) event + event->header.size;
 544	int size = end - data;
 545
 546	BUG_ON(size % sizeof(u64));
 547	mem_bswap_64(data, size);
 548}
 549
 550static void perf_event__all64_swap(union perf_event *event,
 551				   bool sample_id_all __maybe_unused)
 552{
 553	struct perf_event_header *hdr = &event->header;
 554	mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 555}
 556
 557static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
 558{
 559	event->comm.pid = bswap_32(event->comm.pid);
 560	event->comm.tid = bswap_32(event->comm.tid);
 561
 562	if (sample_id_all) {
 563		void *data = &event->comm.comm;
 564
 565		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 566		swap_sample_id_all(event, data);
 567	}
 568}
 569
 570static void perf_event__mmap_swap(union perf_event *event,
 571				  bool sample_id_all)
 572{
 573	event->mmap.pid	  = bswap_32(event->mmap.pid);
 574	event->mmap.tid	  = bswap_32(event->mmap.tid);
 575	event->mmap.start = bswap_64(event->mmap.start);
 576	event->mmap.len	  = bswap_64(event->mmap.len);
 577	event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 578
 579	if (sample_id_all) {
 580		void *data = &event->mmap.filename;
 581
 582		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 583		swap_sample_id_all(event, data);
 584	}
 585}
 586
 587static void perf_event__mmap2_swap(union perf_event *event,
 588				  bool sample_id_all)
 589{
 590	event->mmap2.pid   = bswap_32(event->mmap2.pid);
 591	event->mmap2.tid   = bswap_32(event->mmap2.tid);
 592	event->mmap2.start = bswap_64(event->mmap2.start);
 593	event->mmap2.len   = bswap_64(event->mmap2.len);
 594	event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
 595	event->mmap2.maj   = bswap_32(event->mmap2.maj);
 596	event->mmap2.min   = bswap_32(event->mmap2.min);
 597	event->mmap2.ino   = bswap_64(event->mmap2.ino);
 
 
 
 
 598
 599	if (sample_id_all) {
 600		void *data = &event->mmap2.filename;
 601
 602		data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 603		swap_sample_id_all(event, data);
 604	}
 605}
 606static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
 607{
 608	event->fork.pid	 = bswap_32(event->fork.pid);
 609	event->fork.tid	 = bswap_32(event->fork.tid);
 610	event->fork.ppid = bswap_32(event->fork.ppid);
 611	event->fork.ptid = bswap_32(event->fork.ptid);
 612	event->fork.time = bswap_64(event->fork.time);
 613
 614	if (sample_id_all)
 615		swap_sample_id_all(event, &event->fork + 1);
 616}
 617
 618static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
 619{
 620	event->read.pid		 = bswap_32(event->read.pid);
 621	event->read.tid		 = bswap_32(event->read.tid);
 622	event->read.value	 = bswap_64(event->read.value);
 623	event->read.time_enabled = bswap_64(event->read.time_enabled);
 624	event->read.time_running = bswap_64(event->read.time_running);
 625	event->read.id		 = bswap_64(event->read.id);
 626
 627	if (sample_id_all)
 628		swap_sample_id_all(event, &event->read + 1);
 629}
 630
 631static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
 632{
 633	event->aux.aux_offset = bswap_64(event->aux.aux_offset);
 634	event->aux.aux_size   = bswap_64(event->aux.aux_size);
 635	event->aux.flags      = bswap_64(event->aux.flags);
 636
 637	if (sample_id_all)
 638		swap_sample_id_all(event, &event->aux + 1);
 639}
 640
 641static void perf_event__itrace_start_swap(union perf_event *event,
 642					  bool sample_id_all)
 643{
 644	event->itrace_start.pid	 = bswap_32(event->itrace_start.pid);
 645	event->itrace_start.tid	 = bswap_32(event->itrace_start.tid);
 646
 647	if (sample_id_all)
 648		swap_sample_id_all(event, &event->itrace_start + 1);
 649}
 650
 651static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
 652{
 653	if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
 654		event->context_switch.next_prev_pid =
 655				bswap_32(event->context_switch.next_prev_pid);
 656		event->context_switch.next_prev_tid =
 657				bswap_32(event->context_switch.next_prev_tid);
 658	}
 659
 660	if (sample_id_all)
 661		swap_sample_id_all(event, &event->context_switch + 1);
 662}
 663
 664static void perf_event__text_poke_swap(union perf_event *event, bool sample_id_all)
 665{
 666	event->text_poke.addr    = bswap_64(event->text_poke.addr);
 667	event->text_poke.old_len = bswap_16(event->text_poke.old_len);
 668	event->text_poke.new_len = bswap_16(event->text_poke.new_len);
 669
 670	if (sample_id_all) {
 671		size_t len = sizeof(event->text_poke.old_len) +
 672			     sizeof(event->text_poke.new_len) +
 673			     event->text_poke.old_len +
 674			     event->text_poke.new_len;
 675		void *data = &event->text_poke.old_len;
 676
 677		data += PERF_ALIGN(len, sizeof(u64));
 678		swap_sample_id_all(event, data);
 679	}
 680}
 681
 682static void perf_event__throttle_swap(union perf_event *event,
 683				      bool sample_id_all)
 684{
 685	event->throttle.time	  = bswap_64(event->throttle.time);
 686	event->throttle.id	  = bswap_64(event->throttle.id);
 687	event->throttle.stream_id = bswap_64(event->throttle.stream_id);
 688
 689	if (sample_id_all)
 690		swap_sample_id_all(event, &event->throttle + 1);
 691}
 692
 693static void perf_event__namespaces_swap(union perf_event *event,
 694					bool sample_id_all)
 695{
 696	u64 i;
 697
 698	event->namespaces.pid		= bswap_32(event->namespaces.pid);
 699	event->namespaces.tid		= bswap_32(event->namespaces.tid);
 700	event->namespaces.nr_namespaces	= bswap_64(event->namespaces.nr_namespaces);
 701
 702	for (i = 0; i < event->namespaces.nr_namespaces; i++) {
 703		struct perf_ns_link_info *ns = &event->namespaces.link_info[i];
 704
 705		ns->dev = bswap_64(ns->dev);
 706		ns->ino = bswap_64(ns->ino);
 707	}
 708
 709	if (sample_id_all)
 710		swap_sample_id_all(event, &event->namespaces.link_info[i]);
 711}
 712
 
 
 
 
 
 
 
 
 
 
 
 
 713static u8 revbyte(u8 b)
 714{
 715	int rev = (b >> 4) | ((b & 0xf) << 4);
 716	rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 717	rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 718	return (u8) rev;
 719}
 720
 721/*
 722 * XXX this is hack in attempt to carry flags bitfield
 723 * through endian village. ABI says:
 724 *
 725 * Bit-fields are allocated from right to left (least to most significant)
 726 * on little-endian implementations and from left to right (most to least
 727 * significant) on big-endian implementations.
 728 *
 729 * The above seems to be byte specific, so we need to reverse each
 730 * byte of the bitfield. 'Internet' also says this might be implementation
 731 * specific and we probably need proper fix and carry perf_event_attr
 732 * bitfield flags in separate data file FEAT_ section. Thought this seems
 733 * to work for now.
 734 */
 735static void swap_bitfield(u8 *p, unsigned len)
 736{
 737	unsigned i;
 738
 739	for (i = 0; i < len; i++) {
 740		*p = revbyte(*p);
 741		p++;
 742	}
 743}
 744
 745/* exported for swapping attributes in file header */
 746void perf_event__attr_swap(struct perf_event_attr *attr)
 747{
 748	attr->type		= bswap_32(attr->type);
 749	attr->size		= bswap_32(attr->size);
 750
 751#define bswap_safe(f, n) 					\
 752	(attr->size > (offsetof(struct perf_event_attr, f) + 	\
 753		       sizeof(attr->f) * (n)))
 754#define bswap_field(f, sz) 			\
 755do { 						\
 756	if (bswap_safe(f, 0))			\
 757		attr->f = bswap_##sz(attr->f);	\
 758} while(0)
 759#define bswap_field_16(f) bswap_field(f, 16)
 760#define bswap_field_32(f) bswap_field(f, 32)
 761#define bswap_field_64(f) bswap_field(f, 64)
 762
 763	bswap_field_64(config);
 764	bswap_field_64(sample_period);
 765	bswap_field_64(sample_type);
 766	bswap_field_64(read_format);
 767	bswap_field_32(wakeup_events);
 768	bswap_field_32(bp_type);
 769	bswap_field_64(bp_addr);
 770	bswap_field_64(bp_len);
 771	bswap_field_64(branch_sample_type);
 772	bswap_field_64(sample_regs_user);
 773	bswap_field_32(sample_stack_user);
 774	bswap_field_32(aux_watermark);
 775	bswap_field_16(sample_max_stack);
 776	bswap_field_32(aux_sample_size);
 777
 778	/*
 779	 * After read_format are bitfields. Check read_format because
 780	 * we are unable to use offsetof on bitfield.
 781	 */
 782	if (bswap_safe(read_format, 1))
 783		swap_bitfield((u8 *) (&attr->read_format + 1),
 784			      sizeof(u64));
 785#undef bswap_field_64
 786#undef bswap_field_32
 787#undef bswap_field
 788#undef bswap_safe
 789}
 790
 791static void perf_event__hdr_attr_swap(union perf_event *event,
 792				      bool sample_id_all __maybe_unused)
 793{
 794	size_t size;
 795
 796	perf_event__attr_swap(&event->attr.attr);
 797
 798	size = event->header.size;
 799	size -= (void *)&event->attr.id - (void *)event;
 800	mem_bswap_64(event->attr.id, size);
 801}
 802
 803static void perf_event__event_update_swap(union perf_event *event,
 804					  bool sample_id_all __maybe_unused)
 805{
 806	event->event_update.type = bswap_64(event->event_update.type);
 807	event->event_update.id   = bswap_64(event->event_update.id);
 808}
 809
 810static void perf_event__event_type_swap(union perf_event *event,
 811					bool sample_id_all __maybe_unused)
 812{
 813	event->event_type.event_type.event_id =
 814		bswap_64(event->event_type.event_type.event_id);
 815}
 816
 817static void perf_event__tracing_data_swap(union perf_event *event,
 818					  bool sample_id_all __maybe_unused)
 819{
 820	event->tracing_data.size = bswap_32(event->tracing_data.size);
 821}
 822
 823static void perf_event__auxtrace_info_swap(union perf_event *event,
 824					   bool sample_id_all __maybe_unused)
 825{
 826	size_t size;
 827
 828	event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
 829
 830	size = event->header.size;
 831	size -= (void *)&event->auxtrace_info.priv - (void *)event;
 832	mem_bswap_64(event->auxtrace_info.priv, size);
 833}
 834
 835static void perf_event__auxtrace_swap(union perf_event *event,
 836				      bool sample_id_all __maybe_unused)
 837{
 838	event->auxtrace.size      = bswap_64(event->auxtrace.size);
 839	event->auxtrace.offset    = bswap_64(event->auxtrace.offset);
 840	event->auxtrace.reference = bswap_64(event->auxtrace.reference);
 841	event->auxtrace.idx       = bswap_32(event->auxtrace.idx);
 842	event->auxtrace.tid       = bswap_32(event->auxtrace.tid);
 843	event->auxtrace.cpu       = bswap_32(event->auxtrace.cpu);
 844}
 845
 846static void perf_event__auxtrace_error_swap(union perf_event *event,
 847					    bool sample_id_all __maybe_unused)
 848{
 849	event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
 850	event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
 851	event->auxtrace_error.cpu  = bswap_32(event->auxtrace_error.cpu);
 852	event->auxtrace_error.pid  = bswap_32(event->auxtrace_error.pid);
 853	event->auxtrace_error.tid  = bswap_32(event->auxtrace_error.tid);
 854	event->auxtrace_error.fmt  = bswap_32(event->auxtrace_error.fmt);
 855	event->auxtrace_error.ip   = bswap_64(event->auxtrace_error.ip);
 856	if (event->auxtrace_error.fmt)
 857		event->auxtrace_error.time = bswap_64(event->auxtrace_error.time);
 
 
 
 
 858}
 859
 860static void perf_event__thread_map_swap(union perf_event *event,
 861					bool sample_id_all __maybe_unused)
 862{
 863	unsigned i;
 864
 865	event->thread_map.nr = bswap_64(event->thread_map.nr);
 866
 867	for (i = 0; i < event->thread_map.nr; i++)
 868		event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
 869}
 870
 871static void perf_event__cpu_map_swap(union perf_event *event,
 872				     bool sample_id_all __maybe_unused)
 873{
 874	struct perf_record_cpu_map_data *data = &event->cpu_map.data;
 875	struct cpu_map_entries *cpus;
 876	struct perf_record_record_cpu_map *mask;
 877	unsigned i;
 878
 879	data->type = bswap_64(data->type);
 880
 881	switch (data->type) {
 882	case PERF_CPU_MAP__CPUS:
 883		cpus = (struct cpu_map_entries *)data->data;
 884
 885		cpus->nr = bswap_16(cpus->nr);
 886
 887		for (i = 0; i < cpus->nr; i++)
 888			cpus->cpu[i] = bswap_16(cpus->cpu[i]);
 889		break;
 890	case PERF_CPU_MAP__MASK:
 891		mask = (struct perf_record_record_cpu_map *)data->data;
 892
 893		mask->nr = bswap_16(mask->nr);
 894		mask->long_size = bswap_16(mask->long_size);
 895
 896		switch (mask->long_size) {
 897		case 4: mem_bswap_32(&mask->mask, mask->nr); break;
 898		case 8: mem_bswap_64(&mask->mask, mask->nr); break;
 
 
 
 
 
 899		default:
 900			pr_err("cpu_map swap: unsupported long size\n");
 901		}
 
 
 
 
 
 902	default:
 903		break;
 904	}
 905}
 906
 907static void perf_event__stat_config_swap(union perf_event *event,
 908					 bool sample_id_all __maybe_unused)
 909{
 910	u64 size;
 911
 912	size  = event->stat_config.nr * sizeof(event->stat_config.data[0]);
 913	size += 1; /* nr item itself */
 914	mem_bswap_64(&event->stat_config.nr, size);
 915}
 916
 917static void perf_event__stat_swap(union perf_event *event,
 918				  bool sample_id_all __maybe_unused)
 919{
 920	event->stat.id     = bswap_64(event->stat.id);
 921	event->stat.thread = bswap_32(event->stat.thread);
 922	event->stat.cpu    = bswap_32(event->stat.cpu);
 923	event->stat.val    = bswap_64(event->stat.val);
 924	event->stat.ena    = bswap_64(event->stat.ena);
 925	event->stat.run    = bswap_64(event->stat.run);
 926}
 927
 928static void perf_event__stat_round_swap(union perf_event *event,
 929					bool sample_id_all __maybe_unused)
 930{
 931	event->stat_round.type = bswap_64(event->stat_round.type);
 932	event->stat_round.time = bswap_64(event->stat_round.time);
 933}
 934
 
 
 
 
 
 
 
 
 
 
 
 
 
 935typedef void (*perf_event__swap_op)(union perf_event *event,
 936				    bool sample_id_all);
 937
 938static perf_event__swap_op perf_event__swap_ops[] = {
 939	[PERF_RECORD_MMAP]		  = perf_event__mmap_swap,
 940	[PERF_RECORD_MMAP2]		  = perf_event__mmap2_swap,
 941	[PERF_RECORD_COMM]		  = perf_event__comm_swap,
 942	[PERF_RECORD_FORK]		  = perf_event__task_swap,
 943	[PERF_RECORD_EXIT]		  = perf_event__task_swap,
 944	[PERF_RECORD_LOST]		  = perf_event__all64_swap,
 945	[PERF_RECORD_READ]		  = perf_event__read_swap,
 946	[PERF_RECORD_THROTTLE]		  = perf_event__throttle_swap,
 947	[PERF_RECORD_UNTHROTTLE]	  = perf_event__throttle_swap,
 948	[PERF_RECORD_SAMPLE]		  = perf_event__all64_swap,
 949	[PERF_RECORD_AUX]		  = perf_event__aux_swap,
 950	[PERF_RECORD_ITRACE_START]	  = perf_event__itrace_start_swap,
 951	[PERF_RECORD_LOST_SAMPLES]	  = perf_event__all64_swap,
 952	[PERF_RECORD_SWITCH]		  = perf_event__switch_swap,
 953	[PERF_RECORD_SWITCH_CPU_WIDE]	  = perf_event__switch_swap,
 954	[PERF_RECORD_NAMESPACES]	  = perf_event__namespaces_swap,
 
 955	[PERF_RECORD_TEXT_POKE]		  = perf_event__text_poke_swap,
 
 956	[PERF_RECORD_HEADER_ATTR]	  = perf_event__hdr_attr_swap,
 957	[PERF_RECORD_HEADER_EVENT_TYPE]	  = perf_event__event_type_swap,
 958	[PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
 959	[PERF_RECORD_HEADER_BUILD_ID]	  = NULL,
 960	[PERF_RECORD_ID_INDEX]		  = perf_event__all64_swap,
 961	[PERF_RECORD_AUXTRACE_INFO]	  = perf_event__auxtrace_info_swap,
 962	[PERF_RECORD_AUXTRACE]		  = perf_event__auxtrace_swap,
 963	[PERF_RECORD_AUXTRACE_ERROR]	  = perf_event__auxtrace_error_swap,
 964	[PERF_RECORD_THREAD_MAP]	  = perf_event__thread_map_swap,
 965	[PERF_RECORD_CPU_MAP]		  = perf_event__cpu_map_swap,
 966	[PERF_RECORD_STAT_CONFIG]	  = perf_event__stat_config_swap,
 967	[PERF_RECORD_STAT]		  = perf_event__stat_swap,
 968	[PERF_RECORD_STAT_ROUND]	  = perf_event__stat_round_swap,
 969	[PERF_RECORD_EVENT_UPDATE]	  = perf_event__event_update_swap,
 970	[PERF_RECORD_TIME_CONV]		  = perf_event__all64_swap,
 971	[PERF_RECORD_HEADER_MAX]	  = NULL,
 972};
 973
 974/*
 975 * When perf record finishes a pass on every buffers, it records this pseudo
 976 * event.
 977 * We record the max timestamp t found in the pass n.
 978 * Assuming these timestamps are monotonic across cpus, we know that if
 979 * a buffer still has events with timestamps below t, they will be all
 980 * available and then read in the pass n + 1.
 981 * Hence when we start to read the pass n + 2, we can safely flush every
 982 * events with timestamps below t.
 983 *
 984 *    ============ PASS n =================
 985 *       CPU 0         |   CPU 1
 986 *                     |
 987 *    cnt1 timestamps  |   cnt2 timestamps
 988 *          1          |         2
 989 *          2          |         3
 990 *          -          |         4  <--- max recorded
 991 *
 992 *    ============ PASS n + 1 ==============
 993 *       CPU 0         |   CPU 1
 994 *                     |
 995 *    cnt1 timestamps  |   cnt2 timestamps
 996 *          3          |         5
 997 *          4          |         6
 998 *          5          |         7 <---- max recorded
 999 *
1000 *      Flush every events below timestamp 4
1001 *
1002 *    ============ PASS n + 2 ==============
1003 *       CPU 0         |   CPU 1
1004 *                     |
1005 *    cnt1 timestamps  |   cnt2 timestamps
1006 *          6          |         8
1007 *          7          |         9
1008 *          -          |         10
1009 *
1010 *      Flush every events below timestamp 7
1011 *      etc...
1012 */
1013static int process_finished_round(struct perf_tool *tool __maybe_unused,
1014				  union perf_event *event __maybe_unused,
1015				  struct ordered_events *oe)
1016{
1017	if (dump_trace)
1018		fprintf(stdout, "\n");
1019	return ordered_events__flush(oe, OE_FLUSH__ROUND);
1020}
1021
1022int perf_session__queue_event(struct perf_session *s, union perf_event *event,
1023			      u64 timestamp, u64 file_offset)
1024{
1025	return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset);
1026}
1027
1028static void callchain__lbr_callstack_printf(struct perf_sample *sample)
1029{
1030	struct ip_callchain *callchain = sample->callchain;
1031	struct branch_stack *lbr_stack = sample->branch_stack;
1032	struct branch_entry *entries = perf_sample__branch_entries(sample);
1033	u64 kernel_callchain_nr = callchain->nr;
1034	unsigned int i;
1035
1036	for (i = 0; i < kernel_callchain_nr; i++) {
1037		if (callchain->ips[i] == PERF_CONTEXT_USER)
1038			break;
1039	}
1040
1041	if ((i != kernel_callchain_nr) && lbr_stack->nr) {
1042		u64 total_nr;
1043		/*
1044		 * LBR callstack can only get user call chain,
1045		 * i is kernel call chain number,
1046		 * 1 is PERF_CONTEXT_USER.
1047		 *
1048		 * The user call chain is stored in LBR registers.
1049		 * LBR are pair registers. The caller is stored
1050		 * in "from" register, while the callee is stored
1051		 * in "to" register.
1052		 * For example, there is a call stack
1053		 * "A"->"B"->"C"->"D".
1054		 * The LBR registers will recorde like
1055		 * "C"->"D", "B"->"C", "A"->"B".
1056		 * So only the first "to" register and all "from"
1057		 * registers are needed to construct the whole stack.
1058		 */
1059		total_nr = i + 1 + lbr_stack->nr + 1;
1060		kernel_callchain_nr = i + 1;
1061
1062		printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
1063
1064		for (i = 0; i < kernel_callchain_nr; i++)
1065			printf("..... %2d: %016" PRIx64 "\n",
1066			       i, callchain->ips[i]);
1067
1068		printf("..... %2d: %016" PRIx64 "\n",
1069		       (int)(kernel_callchain_nr), entries[0].to);
1070		for (i = 0; i < lbr_stack->nr; i++)
1071			printf("..... %2d: %016" PRIx64 "\n",
1072			       (int)(i + kernel_callchain_nr + 1), entries[i].from);
1073	}
1074}
1075
1076static void callchain__printf(struct evsel *evsel,
1077			      struct perf_sample *sample)
1078{
1079	unsigned int i;
1080	struct ip_callchain *callchain = sample->callchain;
1081
1082	if (evsel__has_branch_callstack(evsel))
1083		callchain__lbr_callstack_printf(sample);
1084
1085	printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
1086
1087	for (i = 0; i < callchain->nr; i++)
1088		printf("..... %2d: %016" PRIx64 "\n",
1089		       i, callchain->ips[i]);
1090}
1091
1092static void branch_stack__printf(struct perf_sample *sample, bool callstack)
 
1093{
1094	struct branch_entry *entries = perf_sample__branch_entries(sample);
 
 
 
1095	uint64_t i;
1096
1097	printf("%s: nr:%" PRIu64 "\n",
1098		!callstack ? "... branch stack" : "... branch callstack",
1099		sample->branch_stack->nr);
 
 
 
 
 
 
 
 
 
 
 
1100
1101	for (i = 0; i < sample->branch_stack->nr; i++) {
1102		struct branch_entry *e = &entries[i];
1103
1104		if (!callstack) {
1105			printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
1106				i, e->from, e->to,
1107				(unsigned short)e->flags.cycles,
1108				e->flags.mispred ? "M" : " ",
1109				e->flags.predicted ? "P" : " ",
1110				e->flags.abort ? "A" : " ",
1111				e->flags.in_tx ? "T" : " ",
1112				(unsigned)e->flags.reserved);
 
 
1113		} else {
1114			printf("..... %2"PRIu64": %016" PRIx64 "\n",
1115				i, i > 0 ? e->from : e->to);
 
 
 
 
 
1116		}
1117	}
 
 
 
 
 
 
 
1118}
1119
1120static void regs_dump__printf(u64 mask, u64 *regs)
1121{
1122	unsigned rid, i = 0;
1123
1124	for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
1125		u64 val = regs[i++];
1126
1127		printf(".... %-5s 0x%016" PRIx64 "\n",
1128		       perf_reg_name(rid), val);
1129	}
1130}
1131
1132static const char *regs_abi[] = {
1133	[PERF_SAMPLE_REGS_ABI_NONE] = "none",
1134	[PERF_SAMPLE_REGS_ABI_32] = "32-bit",
1135	[PERF_SAMPLE_REGS_ABI_64] = "64-bit",
1136};
1137
1138static inline const char *regs_dump_abi(struct regs_dump *d)
1139{
1140	if (d->abi > PERF_SAMPLE_REGS_ABI_64)
1141		return "unknown";
1142
1143	return regs_abi[d->abi];
1144}
1145
1146static void regs__printf(const char *type, struct regs_dump *regs)
1147{
1148	u64 mask = regs->mask;
1149
1150	printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
1151	       type,
1152	       mask,
1153	       regs_dump_abi(regs));
1154
1155	regs_dump__printf(mask, regs->regs);
1156}
1157
1158static void regs_user__printf(struct perf_sample *sample)
1159{
1160	struct regs_dump *user_regs = &sample->user_regs;
1161
1162	if (user_regs->regs)
1163		regs__printf("user", user_regs);
1164}
1165
1166static void regs_intr__printf(struct perf_sample *sample)
1167{
1168	struct regs_dump *intr_regs = &sample->intr_regs;
1169
1170	if (intr_regs->regs)
1171		regs__printf("intr", intr_regs);
1172}
1173
1174static void stack_user__printf(struct stack_dump *dump)
1175{
1176	printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1177	       dump->size, dump->offset);
1178}
1179
1180static void perf_evlist__print_tstamp(struct evlist *evlist,
1181				       union perf_event *event,
1182				       struct perf_sample *sample)
1183{
1184	u64 sample_type = __evlist__combined_sample_type(evlist);
1185
1186	if (event->header.type != PERF_RECORD_SAMPLE &&
1187	    !evlist__sample_id_all(evlist)) {
1188		fputs("-1 -1 ", stdout);
1189		return;
1190	}
1191
1192	if ((sample_type & PERF_SAMPLE_CPU))
1193		printf("%u ", sample->cpu);
1194
1195	if (sample_type & PERF_SAMPLE_TIME)
1196		printf("%" PRIu64 " ", sample->time);
1197}
1198
1199static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1200{
1201	printf("... sample_read:\n");
1202
1203	if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1204		printf("...... time enabled %016" PRIx64 "\n",
1205		       sample->read.time_enabled);
1206
1207	if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1208		printf("...... time running %016" PRIx64 "\n",
1209		       sample->read.time_running);
1210
1211	if (read_format & PERF_FORMAT_GROUP) {
1212		u64 i;
1213
1214		printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1215
1216		for (i = 0; i < sample->read.group.nr; i++) {
1217			struct sample_read_value *value;
1218
1219			value = &sample->read.group.values[i];
1220			printf("..... id %016" PRIx64
1221			       ", value %016" PRIx64 "\n",
1222			       value->id, value->value);
 
 
 
1223		}
1224	} else
1225		printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1226			sample->read.one.id, sample->read.one.value);
 
 
 
 
1227}
1228
1229static void dump_event(struct evlist *evlist, union perf_event *event,
1230		       u64 file_offset, struct perf_sample *sample)
 
1231{
1232	if (!dump_trace)
1233		return;
1234
1235	printf("\n%#" PRIx64 " [%#x]: event: %d\n",
1236	       file_offset, event->header.size, event->header.type);
1237
1238	trace_event(event);
1239	if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw)
1240		evlist->trace_event_sample_raw(evlist, event, sample);
1241
1242	if (sample)
1243		perf_evlist__print_tstamp(evlist, event, sample);
1244
1245	printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1246	       event->header.size, perf_event__name(event->header.type));
1247}
1248
 
 
 
 
 
 
 
 
1249static void dump_sample(struct evsel *evsel, union perf_event *event,
1250			struct perf_sample *sample)
1251{
1252	u64 sample_type;
 
1253
1254	if (!dump_trace)
1255		return;
1256
1257	printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1258	       event->header.misc, sample->pid, sample->tid, sample->ip,
1259	       sample->period, sample->addr);
1260
1261	sample_type = evsel->core.attr.sample_type;
1262
1263	if (evsel__has_callchain(evsel))
1264		callchain__printf(evsel, sample);
1265
1266	if (evsel__has_br_stack(evsel))
1267		branch_stack__printf(sample, evsel__has_branch_callstack(evsel));
1268
1269	if (sample_type & PERF_SAMPLE_REGS_USER)
1270		regs_user__printf(sample);
1271
1272	if (sample_type & PERF_SAMPLE_REGS_INTR)
1273		regs_intr__printf(sample);
1274
1275	if (sample_type & PERF_SAMPLE_STACK_USER)
1276		stack_user__printf(&sample->user_stack);
1277
1278	if (sample_type & PERF_SAMPLE_WEIGHT)
1279		printf("... weight: %" PRIu64 "\n", sample->weight);
 
 
 
 
 
 
1280
1281	if (sample_type & PERF_SAMPLE_DATA_SRC)
1282		printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1283
1284	if (sample_type & PERF_SAMPLE_PHYS_ADDR)
1285		printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
1286
 
 
 
 
 
 
1287	if (sample_type & PERF_SAMPLE_TRANSACTION)
1288		printf("... transaction: %" PRIx64 "\n", sample->transaction);
1289
1290	if (sample_type & PERF_SAMPLE_READ)
1291		sample_read__printf(sample, evsel->core.attr.read_format);
1292}
1293
1294static void dump_read(struct evsel *evsel, union perf_event *event)
1295{
1296	struct perf_record_read *read_event = &event->read;
1297	u64 read_format;
1298
1299	if (!dump_trace)
1300		return;
1301
1302	printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid,
1303	       evsel__name(evsel), event->read.value);
1304
1305	if (!evsel)
1306		return;
1307
1308	read_format = evsel->core.attr.read_format;
1309
1310	if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1311		printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled);
1312
1313	if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1314		printf("... time running : %" PRI_lu64 "\n", read_event->time_running);
1315
1316	if (read_format & PERF_FORMAT_ID)
1317		printf("... id           : %" PRI_lu64 "\n", read_event->id);
 
 
 
1318}
1319
1320static struct machine *machines__find_for_cpumode(struct machines *machines,
1321					       union perf_event *event,
1322					       struct perf_sample *sample)
1323{
1324	struct machine *machine;
1325
1326	if (perf_guest &&
1327	    ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1328	     (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1329		u32 pid;
1330
1331		if (event->header.type == PERF_RECORD_MMAP
 
 
1332		    || event->header.type == PERF_RECORD_MMAP2)
1333			pid = event->mmap.pid;
1334		else
1335			pid = sample->pid;
1336
1337		machine = machines__find(machines, pid);
1338		if (!machine)
1339			machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
1340		return machine;
 
 
 
 
1341	}
1342
1343	return &machines->host;
1344}
1345
1346static int deliver_sample_value(struct evlist *evlist,
1347				struct perf_tool *tool,
1348				union perf_event *event,
1349				struct perf_sample *sample,
1350				struct sample_read_value *v,
1351				struct machine *machine)
1352{
1353	struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1354	struct evsel *evsel;
1355
1356	if (sid) {
1357		sample->id     = v->id;
1358		sample->period = v->value - sid->period;
1359		sid->period    = v->value;
1360	}
1361
1362	if (!sid || sid->evsel == NULL) {
1363		++evlist->stats.nr_unknown_id;
1364		return 0;
1365	}
1366
1367	/*
1368	 * There's no reason to deliver sample
1369	 * for zero period, bail out.
1370	 */
1371	if (!sample->period)
1372		return 0;
1373
1374	evsel = container_of(sid->evsel, struct evsel, core);
1375	return tool->sample(tool, event, sample, evsel, machine);
1376}
1377
1378static int deliver_sample_group(struct evlist *evlist,
1379				struct perf_tool *tool,
1380				union  perf_event *event,
1381				struct perf_sample *sample,
1382				struct machine *machine)
 
1383{
1384	int ret = -EINVAL;
1385	u64 i;
1386
1387	for (i = 0; i < sample->read.group.nr; i++) {
1388		ret = deliver_sample_value(evlist, tool, event, sample,
1389					   &sample->read.group.values[i],
1390					   machine);
1391		if (ret)
1392			break;
1393	}
1394
1395	return ret;
1396}
1397
1398static int
1399 perf_evlist__deliver_sample(struct evlist *evlist,
1400			     struct perf_tool *tool,
1401			     union  perf_event *event,
1402			     struct perf_sample *sample,
1403			     struct evsel *evsel,
1404			     struct machine *machine)
1405{
1406	/* We know evsel != NULL. */
1407	u64 sample_type = evsel->core.attr.sample_type;
1408	u64 read_format = evsel->core.attr.read_format;
1409
1410	/* Standard sample delivery. */
1411	if (!(sample_type & PERF_SAMPLE_READ))
1412		return tool->sample(tool, event, sample, evsel, machine);
1413
1414	/* For PERF_SAMPLE_READ we have either single or group mode. */
1415	if (read_format & PERF_FORMAT_GROUP)
1416		return deliver_sample_group(evlist, tool, event, sample,
1417					    machine);
1418	else
1419		return deliver_sample_value(evlist, tool, event, sample,
1420					    &sample->read.one, machine);
1421}
1422
1423static int machines__deliver_event(struct machines *machines,
1424				   struct evlist *evlist,
1425				   union perf_event *event,
1426				   struct perf_sample *sample,
1427				   struct perf_tool *tool, u64 file_offset)
 
1428{
1429	struct evsel *evsel;
1430	struct machine *machine;
1431
1432	dump_event(evlist, event, file_offset, sample);
1433
1434	evsel = perf_evlist__id2evsel(evlist, sample->id);
1435
1436	machine = machines__find_for_cpumode(machines, event, sample);
1437
1438	switch (event->header.type) {
1439	case PERF_RECORD_SAMPLE:
1440		if (evsel == NULL) {
1441			++evlist->stats.nr_unknown_id;
1442			return 0;
1443		}
1444		dump_sample(evsel, event, sample);
1445		if (machine == NULL) {
1446			++evlist->stats.nr_unprocessable_samples;
 
1447			return 0;
1448		}
1449		return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
 
1450	case PERF_RECORD_MMAP:
1451		return tool->mmap(tool, event, sample, machine);
1452	case PERF_RECORD_MMAP2:
1453		if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1454			++evlist->stats.nr_proc_map_timeout;
1455		return tool->mmap2(tool, event, sample, machine);
1456	case PERF_RECORD_COMM:
1457		return tool->comm(tool, event, sample, machine);
1458	case PERF_RECORD_NAMESPACES:
1459		return tool->namespaces(tool, event, sample, machine);
1460	case PERF_RECORD_CGROUP:
1461		return tool->cgroup(tool, event, sample, machine);
1462	case PERF_RECORD_FORK:
1463		return tool->fork(tool, event, sample, machine);
1464	case PERF_RECORD_EXIT:
1465		return tool->exit(tool, event, sample, machine);
1466	case PERF_RECORD_LOST:
1467		if (tool->lost == perf_event__process_lost)
1468			evlist->stats.total_lost += event->lost.lost;
1469		return tool->lost(tool, event, sample, machine);
1470	case PERF_RECORD_LOST_SAMPLES:
1471		if (tool->lost_samples == perf_event__process_lost_samples)
 
1472			evlist->stats.total_lost_samples += event->lost_samples.lost;
1473		return tool->lost_samples(tool, event, sample, machine);
1474	case PERF_RECORD_READ:
1475		dump_read(evsel, event);
1476		return tool->read(tool, event, sample, evsel, machine);
1477	case PERF_RECORD_THROTTLE:
1478		return tool->throttle(tool, event, sample, machine);
1479	case PERF_RECORD_UNTHROTTLE:
1480		return tool->unthrottle(tool, event, sample, machine);
1481	case PERF_RECORD_AUX:
1482		if (tool->aux == perf_event__process_aux) {
1483			if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1484				evlist->stats.total_aux_lost += 1;
1485			if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1486				evlist->stats.total_aux_partial += 1;
 
 
1487		}
1488		return tool->aux(tool, event, sample, machine);
1489	case PERF_RECORD_ITRACE_START:
1490		return tool->itrace_start(tool, event, sample, machine);
1491	case PERF_RECORD_SWITCH:
1492	case PERF_RECORD_SWITCH_CPU_WIDE:
1493		return tool->context_switch(tool, event, sample, machine);
1494	case PERF_RECORD_KSYMBOL:
1495		return tool->ksymbol(tool, event, sample, machine);
1496	case PERF_RECORD_BPF_EVENT:
1497		return tool->bpf(tool, event, sample, machine);
1498	case PERF_RECORD_TEXT_POKE:
1499		return tool->text_poke(tool, event, sample, machine);
 
 
1500	default:
1501		++evlist->stats.nr_unknown_events;
1502		return -1;
1503	}
1504}
1505
1506static int perf_session__deliver_event(struct perf_session *session,
1507				       union perf_event *event,
1508				       struct perf_tool *tool,
1509				       u64 file_offset)
 
1510{
1511	struct perf_sample sample;
1512	int ret;
1513
1514	ret = perf_evlist__parse_sample(session->evlist, event, &sample);
1515	if (ret) {
1516		pr_err("Can't parse sample, err = %d\n", ret);
1517		return ret;
1518	}
1519
1520	ret = auxtrace__process_event(session, event, &sample, tool);
1521	if (ret < 0)
1522		return ret;
1523	if (ret > 0)
1524		return 0;
1525
1526	ret = machines__deliver_event(&session->machines, session->evlist,
1527				      event, &sample, tool, file_offset);
1528
1529	if (dump_trace && sample.aux_sample.size)
1530		auxtrace__dump_auxtrace_sample(session, &sample);
1531
1532	return ret;
1533}
1534
1535static s64 perf_session__process_user_event(struct perf_session *session,
1536					    union perf_event *event,
1537					    u64 file_offset)
 
1538{
1539	struct ordered_events *oe = &session->ordered_events;
1540	struct perf_tool *tool = session->tool;
1541	struct perf_sample sample = { .time = 0, };
1542	int fd = perf_data__fd(session->data);
1543	int err;
1544
1545	if (event->header.type != PERF_RECORD_COMPRESSED ||
1546	    tool->compressed == perf_session__process_compressed_event_stub)
1547		dump_event(session->evlist, event, file_offset, &sample);
1548
1549	/* These events are processed right away */
1550	switch (event->header.type) {
1551	case PERF_RECORD_HEADER_ATTR:
1552		err = tool->attr(tool, event, &session->evlist);
1553		if (err == 0) {
1554			perf_session__set_id_hdr_size(session);
1555			perf_session__set_comm_exec(session);
1556		}
1557		return err;
1558	case PERF_RECORD_EVENT_UPDATE:
1559		return tool->event_update(tool, event, &session->evlist);
1560	case PERF_RECORD_HEADER_EVENT_TYPE:
1561		/*
1562		 * Depreceated, but we need to handle it for sake
1563		 * of old data files create in pipe mode.
1564		 */
1565		return 0;
1566	case PERF_RECORD_HEADER_TRACING_DATA:
1567		/*
1568		 * Setup for reading amidst mmap, but only when we
1569		 * are in 'file' mode. The 'pipe' fd is in proper
1570		 * place already.
1571		 */
1572		if (!perf_data__is_pipe(session->data))
1573			lseek(fd, file_offset, SEEK_SET);
1574		return tool->tracing_data(session, event);
1575	case PERF_RECORD_HEADER_BUILD_ID:
1576		return tool->build_id(session, event);
1577	case PERF_RECORD_FINISHED_ROUND:
1578		return tool->finished_round(tool, event, oe);
1579	case PERF_RECORD_ID_INDEX:
1580		return tool->id_index(session, event);
1581	case PERF_RECORD_AUXTRACE_INFO:
1582		return tool->auxtrace_info(session, event);
1583	case PERF_RECORD_AUXTRACE:
1584		/* setup for reading amidst mmap */
1585		lseek(fd, file_offset + event->header.size, SEEK_SET);
 
 
 
 
 
1586		return tool->auxtrace(session, event);
1587	case PERF_RECORD_AUXTRACE_ERROR:
1588		perf_session__auxtrace_error_inc(session, event);
1589		return tool->auxtrace_error(session, event);
1590	case PERF_RECORD_THREAD_MAP:
1591		return tool->thread_map(session, event);
1592	case PERF_RECORD_CPU_MAP:
1593		return tool->cpu_map(session, event);
1594	case PERF_RECORD_STAT_CONFIG:
1595		return tool->stat_config(session, event);
1596	case PERF_RECORD_STAT:
1597		return tool->stat(session, event);
1598	case PERF_RECORD_STAT_ROUND:
1599		return tool->stat_round(session, event);
1600	case PERF_RECORD_TIME_CONV:
1601		session->time_conv = event->time_conv;
1602		return tool->time_conv(session, event);
1603	case PERF_RECORD_HEADER_FEATURE:
1604		return tool->feature(session, event);
1605	case PERF_RECORD_COMPRESSED:
1606		err = tool->compressed(session, event, file_offset);
1607		if (err)
1608			dump_event(session->evlist, event, file_offset, &sample);
1609		return err;
 
 
1610	default:
1611		return -EINVAL;
1612	}
1613}
1614
1615int perf_session__deliver_synth_event(struct perf_session *session,
1616				      union perf_event *event,
1617				      struct perf_sample *sample)
1618{
1619	struct evlist *evlist = session->evlist;
1620	struct perf_tool *tool = session->tool;
1621
1622	events_stats__inc(&evlist->stats, event->header.type);
1623
1624	if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1625		return perf_session__process_user_event(session, event, 0);
1626
1627	return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1628}
1629
1630static void event_swap(union perf_event *event, bool sample_id_all)
1631{
1632	perf_event__swap_op swap;
1633
1634	swap = perf_event__swap_ops[event->header.type];
1635	if (swap)
1636		swap(event, sample_id_all);
1637}
1638
1639int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1640			     void *buf, size_t buf_sz,
1641			     union perf_event **event_ptr,
1642			     struct perf_sample *sample)
1643{
1644	union perf_event *event;
1645	size_t hdr_sz, rest;
1646	int fd;
1647
1648	if (session->one_mmap && !session->header.needs_swap) {
1649		event = file_offset - session->one_mmap_offset +
1650			session->one_mmap_addr;
1651		goto out_parse_sample;
1652	}
1653
1654	if (perf_data__is_pipe(session->data))
1655		return -1;
1656
1657	fd = perf_data__fd(session->data);
1658	hdr_sz = sizeof(struct perf_event_header);
1659
1660	if (buf_sz < hdr_sz)
1661		return -1;
1662
1663	if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1664	    readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1665		return -1;
1666
1667	event = (union perf_event *)buf;
1668
1669	if (session->header.needs_swap)
1670		perf_event_header__bswap(&event->header);
1671
1672	if (event->header.size < hdr_sz || event->header.size > buf_sz)
1673		return -1;
1674
 
1675	rest = event->header.size - hdr_sz;
1676
1677	if (readn(fd, buf, rest) != (ssize_t)rest)
1678		return -1;
1679
1680	if (session->header.needs_swap)
1681		event_swap(event, evlist__sample_id_all(session->evlist));
1682
1683out_parse_sample:
1684
1685	if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1686	    perf_evlist__parse_sample(session->evlist, event, sample))
1687		return -1;
1688
1689	*event_ptr = event;
1690
1691	return 0;
1692}
1693
1694int perf_session__peek_events(struct perf_session *session, u64 offset,
1695			      u64 size, peek_events_cb_t cb, void *data)
1696{
1697	u64 max_offset = offset + size;
1698	char buf[PERF_SAMPLE_MAX_SIZE];
1699	union perf_event *event;
1700	int err;
1701
1702	do {
1703		err = perf_session__peek_event(session, offset, buf,
1704					       PERF_SAMPLE_MAX_SIZE, &event,
1705					       NULL);
1706		if (err)
1707			return err;
1708
1709		err = cb(session, event, offset, data);
1710		if (err)
1711			return err;
1712
1713		offset += event->header.size;
1714		if (event->header.type == PERF_RECORD_AUXTRACE)
1715			offset += event->auxtrace.size;
1716
1717	} while (offset < max_offset);
1718
1719	return err;
1720}
1721
1722static s64 perf_session__process_event(struct perf_session *session,
1723				       union perf_event *event, u64 file_offset)
 
1724{
1725	struct evlist *evlist = session->evlist;
1726	struct perf_tool *tool = session->tool;
1727	int ret;
1728
1729	if (session->header.needs_swap)
1730		event_swap(event, evlist__sample_id_all(evlist));
1731
1732	if (event->header.type >= PERF_RECORD_HEADER_MAX)
1733		return -EINVAL;
1734
1735	events_stats__inc(&evlist->stats, event->header.type);
1736
1737	if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1738		return perf_session__process_user_event(session, event, file_offset);
1739
1740	if (tool->ordered_events) {
1741		u64 timestamp = -1ULL;
1742
1743		ret = perf_evlist__parse_sample_timestamp(evlist, event, &timestamp);
1744		if (ret && ret != -1)
1745			return ret;
1746
1747		ret = perf_session__queue_event(session, event, timestamp, file_offset);
1748		if (ret != -ETIME)
1749			return ret;
1750	}
1751
1752	return perf_session__deliver_event(session, event, tool, file_offset);
1753}
1754
1755void perf_event_header__bswap(struct perf_event_header *hdr)
1756{
1757	hdr->type = bswap_32(hdr->type);
1758	hdr->misc = bswap_16(hdr->misc);
1759	hdr->size = bswap_16(hdr->size);
1760}
1761
1762struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1763{
1764	return machine__findnew_thread(&session->machines.host, -1, pid);
1765}
1766
1767/*
1768 * Threads are identified by pid and tid, and the idle task has pid == tid == 0.
1769 * So here a single thread is created for that, but actually there is a separate
1770 * idle task per cpu, so there should be one 'struct thread' per cpu, but there
1771 * is only 1. That causes problems for some tools, requiring workarounds. For
1772 * example get_idle_thread() in builtin-sched.c, or thread_stack__per_cpu().
1773 */
1774int perf_session__register_idle_thread(struct perf_session *session)
1775{
1776	struct thread *thread;
1777	int err = 0;
1778
1779	thread = machine__findnew_thread(&session->machines.host, 0, 0);
1780	if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1781		pr_err("problem inserting idle task.\n");
1782		err = -1;
1783	}
1784
1785	if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) {
1786		pr_err("problem inserting idle task.\n");
1787		err = -1;
1788	}
1789
1790	/* machine__findnew_thread() got the thread, so put it */
1791	thread__put(thread);
1792	return err;
1793}
1794
1795static void
1796perf_session__warn_order(const struct perf_session *session)
1797{
1798	const struct ordered_events *oe = &session->ordered_events;
1799	struct evsel *evsel;
1800	bool should_warn = true;
1801
1802	evlist__for_each_entry(session->evlist, evsel) {
1803		if (evsel->core.attr.write_backward)
1804			should_warn = false;
1805	}
1806
1807	if (!should_warn)
1808		return;
1809	if (oe->nr_unordered_events != 0)
1810		ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1811}
1812
1813static void perf_session__warn_about_errors(const struct perf_session *session)
1814{
1815	const struct events_stats *stats = &session->evlist->stats;
1816
1817	if (session->tool->lost == perf_event__process_lost &&
1818	    stats->nr_events[PERF_RECORD_LOST] != 0) {
1819		ui__warning("Processed %d events and lost %d chunks!\n\n"
1820			    "Check IO/CPU overload!\n\n",
1821			    stats->nr_events[0],
1822			    stats->nr_events[PERF_RECORD_LOST]);
1823	}
1824
1825	if (session->tool->lost_samples == perf_event__process_lost_samples) {
1826		double drop_rate;
1827
1828		drop_rate = (double)stats->total_lost_samples /
1829			    (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1830		if (drop_rate > 0.05) {
1831			ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n",
1832				    stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1833				    drop_rate * 100.0);
1834		}
1835	}
1836
1837	if (session->tool->aux == perf_event__process_aux &&
1838	    stats->total_aux_lost != 0) {
1839		ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1840			    stats->total_aux_lost,
1841			    stats->nr_events[PERF_RECORD_AUX]);
1842	}
1843
1844	if (session->tool->aux == perf_event__process_aux &&
1845	    stats->total_aux_partial != 0) {
1846		bool vmm_exclusive = false;
1847
1848		(void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1849		                       &vmm_exclusive);
1850
1851		ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1852		            "Are you running a KVM guest in the background?%s\n\n",
1853			    stats->total_aux_partial,
1854			    stats->nr_events[PERF_RECORD_AUX],
1855			    vmm_exclusive ?
1856			    "\nReloading kvm_intel module with vmm_exclusive=0\n"
1857			    "will reduce the gaps to only guest's timeslices." :
1858			    "");
1859	}
1860
 
 
 
 
 
 
 
1861	if (stats->nr_unknown_events != 0) {
1862		ui__warning("Found %u unknown events!\n\n"
1863			    "Is this an older tool processing a perf.data "
1864			    "file generated by a more recent tool?\n\n"
1865			    "If that is not the case, consider "
1866			    "reporting to linux-kernel@vger.kernel.org.\n\n",
1867			    stats->nr_unknown_events);
1868	}
1869
1870	if (stats->nr_unknown_id != 0) {
1871		ui__warning("%u samples with id not present in the header\n",
1872			    stats->nr_unknown_id);
1873	}
1874
1875	if (stats->nr_invalid_chains != 0) {
1876		ui__warning("Found invalid callchains!\n\n"
1877			    "%u out of %u events were discarded for this reason.\n\n"
1878			    "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1879			    stats->nr_invalid_chains,
1880			    stats->nr_events[PERF_RECORD_SAMPLE]);
1881	}
1882
1883	if (stats->nr_unprocessable_samples != 0) {
1884		ui__warning("%u unprocessable samples recorded.\n"
1885			    "Do you have a KVM guest running and not using 'perf kvm'?\n",
1886			    stats->nr_unprocessable_samples);
1887	}
1888
1889	perf_session__warn_order(session);
1890
1891	events_stats__auxtrace_error_warn(stats);
1892
1893	if (stats->nr_proc_map_timeout != 0) {
1894		ui__warning("%d map information files for pre-existing threads were\n"
1895			    "not processed, if there are samples for addresses they\n"
1896			    "will not be resolved, you may find out which are these\n"
1897			    "threads by running with -v and redirecting the output\n"
1898			    "to a file.\n"
1899			    "The time limit to process proc map is too short?\n"
1900			    "Increase it by --proc-map-timeout\n",
1901			    stats->nr_proc_map_timeout);
1902	}
1903}
1904
1905static int perf_session__flush_thread_stack(struct thread *thread,
1906					    void *p __maybe_unused)
1907{
1908	return thread_stack__flush(thread);
1909}
1910
1911static int perf_session__flush_thread_stacks(struct perf_session *session)
1912{
1913	return machines__for_each_thread(&session->machines,
1914					 perf_session__flush_thread_stack,
1915					 NULL);
1916}
1917
1918volatile int session_done;
1919
1920static int __perf_session__process_decomp_events(struct perf_session *session);
1921
1922static int __perf_session__process_pipe_events(struct perf_session *session)
1923{
1924	struct ordered_events *oe = &session->ordered_events;
1925	struct perf_tool *tool = session->tool;
1926	int fd = perf_data__fd(session->data);
1927	union perf_event *event;
1928	uint32_t size, cur_size = 0;
1929	void *buf = NULL;
1930	s64 skip = 0;
1931	u64 head;
1932	ssize_t err;
1933	void *p;
1934
1935	perf_tool__fill_defaults(tool);
1936
1937	head = 0;
1938	cur_size = sizeof(union perf_event);
1939
1940	buf = malloc(cur_size);
1941	if (!buf)
1942		return -errno;
1943	ordered_events__set_copy_on_queue(oe, true);
1944more:
1945	event = buf;
1946	err = readn(fd, event, sizeof(struct perf_event_header));
 
1947	if (err <= 0) {
1948		if (err == 0)
1949			goto done;
1950
1951		pr_err("failed to read event header\n");
1952		goto out_err;
1953	}
1954
1955	if (session->header.needs_swap)
1956		perf_event_header__bswap(&event->header);
1957
1958	size = event->header.size;
1959	if (size < sizeof(struct perf_event_header)) {
1960		pr_err("bad event header size\n");
1961		goto out_err;
1962	}
1963
1964	if (size > cur_size) {
1965		void *new = realloc(buf, size);
1966		if (!new) {
1967			pr_err("failed to allocate memory to read event\n");
1968			goto out_err;
1969		}
1970		buf = new;
1971		cur_size = size;
1972		event = buf;
1973	}
1974	p = event;
1975	p += sizeof(struct perf_event_header);
1976
1977	if (size - sizeof(struct perf_event_header)) {
1978		err = readn(fd, p, size - sizeof(struct perf_event_header));
 
1979		if (err <= 0) {
1980			if (err == 0) {
1981				pr_err("unexpected end of event stream\n");
1982				goto done;
1983			}
1984
1985			pr_err("failed to read event data\n");
1986			goto out_err;
1987		}
1988	}
1989
1990	if ((skip = perf_session__process_event(session, event, head)) < 0) {
1991		pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1992		       head, event->header.size, event->header.type);
1993		err = -EINVAL;
1994		goto out_err;
1995	}
1996
1997	head += size;
1998
1999	if (skip > 0)
2000		head += skip;
2001
2002	err = __perf_session__process_decomp_events(session);
2003	if (err)
2004		goto out_err;
2005
2006	if (!session_done())
2007		goto more;
2008done:
2009	/* do the final flush for ordered samples */
2010	err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2011	if (err)
2012		goto out_err;
2013	err = auxtrace__flush_events(session, tool);
2014	if (err)
2015		goto out_err;
2016	err = perf_session__flush_thread_stacks(session);
2017out_err:
2018	free(buf);
2019	if (!tool->no_warn)
2020		perf_session__warn_about_errors(session);
2021	ordered_events__free(&session->ordered_events);
2022	auxtrace__free_events(session);
2023	return err;
2024}
2025
2026static union perf_event *
2027prefetch_event(char *buf, u64 head, size_t mmap_size,
2028	       bool needs_swap, union perf_event *error)
2029{
2030	union perf_event *event;
 
2031
2032	/*
2033	 * Ensure we have enough space remaining to read
2034	 * the size of the event in the headers.
2035	 */
2036	if (head + sizeof(event->header) > mmap_size)
2037		return NULL;
2038
2039	event = (union perf_event *)(buf + head);
2040	if (needs_swap)
2041		perf_event_header__bswap(&event->header);
2042
2043	if (head + event->header.size <= mmap_size)
 
2044		return event;
2045
2046	/* We're not fetching the event so swap back again */
2047	if (needs_swap)
2048		perf_event_header__bswap(&event->header);
2049
2050	pr_debug("%s: head=%#" PRIx64 " event->header_size=%#x, mmap_size=%#zx:"
2051		 " fuzzed or compressed perf.data?\n",__func__, head, event->header.size, mmap_size);
 
 
 
 
 
 
 
2052
2053	return error;
2054}
2055
2056static union perf_event *
2057fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2058{
2059	return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL));
2060}
2061
2062static union perf_event *
2063fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2064{
2065	return prefetch_event(buf, head, mmap_size, needs_swap, NULL);
2066}
2067
2068static int __perf_session__process_decomp_events(struct perf_session *session)
2069{
2070	s64 skip;
2071	u64 size, file_pos = 0;
2072	struct decomp *decomp = session->decomp_last;
2073
2074	if (!decomp)
2075		return 0;
2076
2077	while (decomp->head < decomp->size && !session_done()) {
2078		union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data,
2079							     session->header.needs_swap);
2080
2081		if (!event)
2082			break;
2083
2084		size = event->header.size;
2085
2086		if (size < sizeof(struct perf_event_header) ||
2087		    (skip = perf_session__process_event(session, event, file_pos)) < 0) {
 
2088			pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
2089				decomp->file_pos + decomp->head, event->header.size, event->header.type);
2090			return -EINVAL;
2091		}
2092
2093		if (skip)
2094			size += skip;
2095
2096		decomp->head += size;
2097	}
2098
2099	return 0;
2100}
2101
2102/*
2103 * On 64bit we can mmap the data file in one go. No need for tiny mmap
2104 * slices. On 32bit we use 32MB.
2105 */
2106#if BITS_PER_LONG == 64
2107#define MMAP_SIZE ULLONG_MAX
2108#define NUM_MMAPS 1
2109#else
2110#define MMAP_SIZE (32 * 1024 * 1024ULL)
2111#define NUM_MMAPS 128
2112#endif
2113
2114struct reader;
2115
2116typedef s64 (*reader_cb_t)(struct perf_session *session,
2117			   union perf_event *event,
2118			   u64 file_offset);
 
2119
2120struct reader {
2121	int		 fd;
 
2122	u64		 data_size;
2123	u64		 data_offset;
2124	reader_cb_t	 process;
 
 
 
 
 
 
 
 
 
 
 
 
2125};
2126
2127static int
2128reader__process_events(struct reader *rd, struct perf_session *session,
2129		       struct ui_progress *prog)
2130{
2131	u64 data_size = rd->data_size;
2132	u64 head, page_offset, file_offset, file_pos, size;
2133	int err = 0, mmap_prot, mmap_flags, map_idx = 0;
2134	size_t	mmap_size;
2135	char *buf, *mmaps[NUM_MMAPS];
2136	union perf_event *event;
2137	s64 skip;
 
 
 
 
 
2138
2139	page_offset = page_size * (rd->data_offset / page_size);
2140	file_offset = page_offset;
2141	head = rd->data_offset - page_offset;
2142
2143	ui_progress__init_size(prog, data_size, "Processing events...");
 
 
2144
2145	data_size += rd->data_offset;
 
2146
2147	mmap_size = MMAP_SIZE;
2148	if (mmap_size > data_size) {
2149		mmap_size = data_size;
2150		session->one_mmap = true;
2151	}
 
2152
2153	memset(mmaps, 0, sizeof(mmaps));
 
 
 
 
 
2154
2155	mmap_prot  = PROT_READ;
2156	mmap_flags = MAP_SHARED;
2157
2158	if (session->header.needs_swap) {
 
 
2159		mmap_prot  |= PROT_WRITE;
2160		mmap_flags = MAP_PRIVATE;
2161	}
2162remap:
2163	buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd->fd,
2164		   file_offset);
 
 
 
 
 
 
 
 
 
2165	if (buf == MAP_FAILED) {
2166		pr_err("failed to mmap file\n");
2167		err = -errno;
2168		goto out;
2169	}
2170	mmaps[map_idx] = buf;
2171	map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
2172	file_pos = file_offset + head;
2173	if (session->one_mmap) {
2174		session->one_mmap_addr = buf;
2175		session->one_mmap_offset = file_offset;
2176	}
2177
2178more:
2179	event = fetch_mmaped_event(head, mmap_size, buf, session->header.needs_swap);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2180	if (IS_ERR(event))
2181		return PTR_ERR(event);
2182
2183	if (!event) {
2184		if (mmaps[map_idx]) {
2185			munmap(mmaps[map_idx], mmap_size);
2186			mmaps[map_idx] = NULL;
2187		}
2188
2189		page_offset = page_size * (head / page_size);
2190		file_offset += page_offset;
2191		head -= page_offset;
2192		goto remap;
2193	}
2194
2195	size = event->header.size;
2196
2197	skip = -EINVAL;
2198
2199	if (size < sizeof(struct perf_event_header) ||
2200	    (skip = rd->process(session, event, file_pos)) < 0) {
2201		pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n",
2202		       file_offset + head, event->header.size,
2203		       event->header.type, strerror(-skip));
2204		err = skip;
2205		goto out;
2206	}
2207
2208	if (skip)
2209		size += skip;
2210
2211	head += size;
2212	file_pos += size;
 
2213
2214	err = __perf_session__process_decomp_events(session);
2215	if (err)
2216		goto out;
2217
2218	ui_progress__update(prog, size);
2219
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2220	if (session_done())
2221		goto out;
2222
2223	if (file_pos < data_size)
2224		goto more;
2225
2226out:
 
2227	return err;
2228}
2229
2230static s64 process_simple(struct perf_session *session,
2231			  union perf_event *event,
2232			  u64 file_offset)
 
2233{
2234	return perf_session__process_event(session, event, file_offset);
2235}
2236
2237static int __perf_session__process_events(struct perf_session *session)
2238{
2239	struct reader rd = {
2240		.fd		= perf_data__fd(session->data),
 
2241		.data_size	= session->header.data_size,
2242		.data_offset	= session->header.data_offset,
2243		.process	= process_simple,
 
2244	};
2245	struct ordered_events *oe = &session->ordered_events;
2246	struct perf_tool *tool = session->tool;
2247	struct ui_progress prog;
2248	int err;
2249
2250	perf_tool__fill_defaults(tool);
2251
2252	if (rd.data_size == 0)
2253		return -1;
2254
2255	ui_progress__init_size(&prog, rd.data_size, "Processing events...");
2256
2257	err = reader__process_events(&rd, session, &prog);
2258	if (err)
2259		goto out_err;
2260	/* do the final flush for ordered samples */
2261	err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2262	if (err)
2263		goto out_err;
2264	err = auxtrace__flush_events(session, tool);
2265	if (err)
2266		goto out_err;
2267	err = perf_session__flush_thread_stacks(session);
2268out_err:
2269	ui_progress__finish();
2270	if (!tool->no_warn)
2271		perf_session__warn_about_errors(session);
2272	/*
2273	 * We may switching perf.data output, make ordered_events
2274	 * reusable.
2275	 */
2276	ordered_events__reinit(&session->ordered_events);
2277	auxtrace__free_events(session);
 
2278	session->one_mmap = false;
2279	return err;
2280}
2281
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2282int perf_session__process_events(struct perf_session *session)
2283{
2284	if (perf_session__register_idle_thread(session) < 0)
2285		return -ENOMEM;
2286
2287	if (perf_data__is_pipe(session->data))
2288		return __perf_session__process_pipe_events(session);
2289
 
 
 
2290	return __perf_session__process_events(session);
2291}
2292
2293bool perf_session__has_traces(struct perf_session *session, const char *msg)
2294{
2295	struct evsel *evsel;
2296
2297	evlist__for_each_entry(session->evlist, evsel) {
2298		if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT)
2299			return true;
2300	}
2301
2302	pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
2303	return false;
2304}
2305
2306int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr)
2307{
2308	char *bracket;
2309	struct ref_reloc_sym *ref;
2310	struct kmap *kmap;
2311
2312	ref = zalloc(sizeof(struct ref_reloc_sym));
2313	if (ref == NULL)
2314		return -ENOMEM;
2315
2316	ref->name = strdup(symbol_name);
2317	if (ref->name == NULL) {
2318		free(ref);
2319		return -ENOMEM;
2320	}
2321
2322	bracket = strchr(ref->name, ']');
2323	if (bracket)
2324		*bracket = '\0';
2325
2326	ref->addr = addr;
2327
2328	kmap = map__kmap(map);
2329	if (kmap)
2330		kmap->ref_reloc_sym = ref;
2331
2332	return 0;
2333}
2334
2335size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
2336{
2337	return machines__fprintf_dsos(&session->machines, fp);
2338}
2339
2340size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
2341					  bool (skip)(struct dso *dso, int parm), int parm)
2342{
2343	return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
2344}
2345
2346size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
 
2347{
2348	size_t ret;
2349	const char *msg = "";
2350
2351	if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
2352		msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
2353
2354	ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
2355
2356	ret += events_stats__fprintf(&session->evlist->stats, fp);
2357	return ret;
2358}
2359
2360size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2361{
2362	/*
2363	 * FIXME: Here we have to actually print all the machines in this
2364	 * session, not just the host...
2365	 */
2366	return machine__fprintf(&session->machines.host, fp);
2367}
2368
2369struct evsel *perf_session__find_first_evtype(struct perf_session *session,
2370					      unsigned int type)
2371{
2372	struct evsel *pos;
2373
2374	evlist__for_each_entry(session->evlist, pos) {
2375		if (pos->core.attr.type == type)
2376			return pos;
2377	}
2378	return NULL;
2379}
2380
2381int perf_session__cpu_bitmap(struct perf_session *session,
2382			     const char *cpu_list, unsigned long *cpu_bitmap)
2383{
2384	int i, err = -1;
2385	struct perf_cpu_map *map;
2386	int nr_cpus = min(session->header.env.nr_cpus_online, MAX_NR_CPUS);
2387
2388	for (i = 0; i < PERF_TYPE_MAX; ++i) {
2389		struct evsel *evsel;
2390
2391		evsel = perf_session__find_first_evtype(session, i);
2392		if (!evsel)
2393			continue;
2394
2395		if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) {
2396			pr_err("File does not contain CPU events. "
2397			       "Remove -C option to proceed.\n");
2398			return -1;
2399		}
2400	}
2401
2402	map = perf_cpu_map__new(cpu_list);
2403	if (map == NULL) {
2404		pr_err("Invalid cpu_list\n");
2405		return -1;
2406	}
2407
2408	for (i = 0; i < map->nr; i++) {
2409		int cpu = map->map[i];
2410
2411		if (cpu >= nr_cpus) {
2412			pr_err("Requested CPU %d too large. "
2413			       "Consider raising MAX_NR_CPUS\n", cpu);
2414			goto out_delete_map;
2415		}
2416
2417		set_bit(cpu, cpu_bitmap);
2418	}
2419
2420	err = 0;
2421
2422out_delete_map:
2423	perf_cpu_map__put(map);
2424	return err;
2425}
2426
2427void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2428				bool full)
2429{
2430	if (session == NULL || fp == NULL)
2431		return;
2432
2433	fprintf(fp, "# ========\n");
2434	perf_header__fprintf_info(session, fp, full);
2435	fprintf(fp, "# ========\n#\n");
2436}
2437
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2438int perf_event__process_id_index(struct perf_session *session,
2439				 union perf_event *event)
2440{
2441	struct evlist *evlist = session->evlist;
2442	struct perf_record_id_index *ie = &event->id_index;
 
2443	size_t i, nr, max_nr;
 
 
 
 
 
2444
2445	max_nr = (ie->header.size - sizeof(struct perf_record_id_index)) /
2446		 sizeof(struct id_index_entry);
2447	nr = ie->nr;
2448	if (nr > max_nr)
 
2449		return -EINVAL;
 
 
 
 
 
 
 
 
 
 
 
 
2450
2451	if (dump_trace)
2452		fprintf(stdout, " nr: %zu\n", nr);
2453
2454	for (i = 0; i < nr; i++) {
2455		struct id_index_entry *e = &ie->entries[i];
2456		struct perf_sample_id *sid;
 
2457
2458		if (dump_trace) {
2459			fprintf(stdout,	" ... id: %"PRI_lu64, e->id);
2460			fprintf(stdout,	"  idx: %"PRI_lu64, e->idx);
2461			fprintf(stdout,	"  cpu: %"PRI_ld64, e->cpu);
2462			fprintf(stdout,	"  tid: %"PRI_ld64"\n", e->tid);
 
 
 
 
 
 
2463		}
2464
2465		sid = perf_evlist__id2sid(evlist, e->id);
2466		if (!sid)
2467			return -ENOENT;
 
2468		sid->idx = e->idx;
2469		sid->cpu = e->cpu;
2470		sid->tid = e->tid;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2471	}
2472	return 0;
2473}