Adrian Hunter | 90e457f | 2015-07-17 19:33:41 +0300 | [diff] [blame] | 1 | /* |
| 2 | * intel_pt.c: Intel Processor Trace support |
| 3 | * Copyright (c) 2013-2015, Intel Corporation. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms and conditions of the GNU General Public License, |
| 7 | * version 2, as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #include <stdio.h> |
| 17 | #include <stdbool.h> |
| 18 | #include <errno.h> |
| 19 | #include <linux/kernel.h> |
| 20 | #include <linux/types.h> |
| 21 | |
| 22 | #include "../perf.h" |
| 23 | #include "session.h" |
| 24 | #include "machine.h" |
| 25 | #include "tool.h" |
| 26 | #include "event.h" |
| 27 | #include "evlist.h" |
| 28 | #include "evsel.h" |
| 29 | #include "map.h" |
| 30 | #include "color.h" |
| 31 | #include "util.h" |
| 32 | #include "thread.h" |
| 33 | #include "thread-stack.h" |
| 34 | #include "symbol.h" |
| 35 | #include "callchain.h" |
| 36 | #include "dso.h" |
| 37 | #include "debug.h" |
| 38 | #include "auxtrace.h" |
| 39 | #include "tsc.h" |
| 40 | #include "intel-pt.h" |
| 41 | |
| 42 | #include "intel-pt-decoder/intel-pt-log.h" |
| 43 | #include "intel-pt-decoder/intel-pt-decoder.h" |
| 44 | #include "intel-pt-decoder/intel-pt-insn-decoder.h" |
| 45 | #include "intel-pt-decoder/intel-pt-pkt-decoder.h" |
| 46 | |
| 47 | #define MAX_TIMESTAMP (~0ULL) |
| 48 | |
| 49 | struct intel_pt { |
| 50 | struct auxtrace auxtrace; |
| 51 | struct auxtrace_queues queues; |
| 52 | struct auxtrace_heap heap; |
| 53 | u32 auxtrace_type; |
| 54 | struct perf_session *session; |
| 55 | struct machine *machine; |
| 56 | struct perf_evsel *switch_evsel; |
| 57 | struct thread *unknown_thread; |
| 58 | bool timeless_decoding; |
| 59 | bool sampling_mode; |
| 60 | bool snapshot_mode; |
| 61 | bool per_cpu_mmaps; |
| 62 | bool have_tsc; |
| 63 | bool data_queued; |
| 64 | bool est_tsc; |
| 65 | bool sync_switch; |
| 66 | int have_sched_switch; |
| 67 | u32 pmu_type; |
| 68 | u64 kernel_start; |
| 69 | u64 switch_ip; |
| 70 | u64 ptss_ip; |
| 71 | |
| 72 | struct perf_tsc_conversion tc; |
| 73 | bool cap_user_time_zero; |
| 74 | |
| 75 | struct itrace_synth_opts synth_opts; |
| 76 | |
| 77 | bool sample_instructions; |
| 78 | u64 instructions_sample_type; |
| 79 | u64 instructions_sample_period; |
| 80 | u64 instructions_id; |
| 81 | |
| 82 | bool sample_branches; |
| 83 | u32 branches_filter; |
| 84 | u64 branches_sample_type; |
| 85 | u64 branches_id; |
| 86 | |
| 87 | bool sample_transactions; |
| 88 | u64 transactions_sample_type; |
| 89 | u64 transactions_id; |
| 90 | |
| 91 | bool synth_needs_swap; |
| 92 | |
| 93 | u64 tsc_bit; |
| 94 | u64 noretcomp_bit; |
| 95 | unsigned max_non_turbo_ratio; |
| 96 | }; |
| 97 | |
| 98 | enum switch_state { |
| 99 | INTEL_PT_SS_NOT_TRACING, |
| 100 | INTEL_PT_SS_UNKNOWN, |
| 101 | INTEL_PT_SS_TRACING, |
| 102 | INTEL_PT_SS_EXPECTING_SWITCH_EVENT, |
| 103 | INTEL_PT_SS_EXPECTING_SWITCH_IP, |
| 104 | }; |
| 105 | |
| 106 | struct intel_pt_queue { |
| 107 | struct intel_pt *pt; |
| 108 | unsigned int queue_nr; |
| 109 | struct auxtrace_buffer *buffer; |
| 110 | void *decoder; |
| 111 | const struct intel_pt_state *state; |
| 112 | struct ip_callchain *chain; |
| 113 | union perf_event *event_buf; |
| 114 | bool on_heap; |
| 115 | bool stop; |
| 116 | bool step_through_buffers; |
| 117 | bool use_buffer_pid_tid; |
| 118 | pid_t pid, tid; |
| 119 | int cpu; |
| 120 | int switch_state; |
| 121 | pid_t next_tid; |
| 122 | struct thread *thread; |
| 123 | bool exclude_kernel; |
| 124 | bool have_sample; |
| 125 | u64 time; |
| 126 | u64 timestamp; |
| 127 | u32 flags; |
| 128 | u16 insn_len; |
| 129 | }; |
| 130 | |
| 131 | static void intel_pt_dump(struct intel_pt *pt __maybe_unused, |
| 132 | unsigned char *buf, size_t len) |
| 133 | { |
| 134 | struct intel_pt_pkt packet; |
| 135 | size_t pos = 0; |
| 136 | int ret, pkt_len, i; |
| 137 | char desc[INTEL_PT_PKT_DESC_MAX]; |
| 138 | const char *color = PERF_COLOR_BLUE; |
| 139 | |
| 140 | color_fprintf(stdout, color, |
| 141 | ". ... Intel Processor Trace data: size %zu bytes\n", |
| 142 | len); |
| 143 | |
| 144 | while (len) { |
| 145 | ret = intel_pt_get_packet(buf, len, &packet); |
| 146 | if (ret > 0) |
| 147 | pkt_len = ret; |
| 148 | else |
| 149 | pkt_len = 1; |
| 150 | printf("."); |
| 151 | color_fprintf(stdout, color, " %08x: ", pos); |
| 152 | for (i = 0; i < pkt_len; i++) |
| 153 | color_fprintf(stdout, color, " %02x", buf[i]); |
| 154 | for (; i < 16; i++) |
| 155 | color_fprintf(stdout, color, " "); |
| 156 | if (ret > 0) { |
| 157 | ret = intel_pt_pkt_desc(&packet, desc, |
| 158 | INTEL_PT_PKT_DESC_MAX); |
| 159 | if (ret > 0) |
| 160 | color_fprintf(stdout, color, " %s\n", desc); |
| 161 | } else { |
| 162 | color_fprintf(stdout, color, " Bad packet!\n"); |
| 163 | } |
| 164 | pos += pkt_len; |
| 165 | buf += pkt_len; |
| 166 | len -= pkt_len; |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | static void intel_pt_dump_event(struct intel_pt *pt, unsigned char *buf, |
| 171 | size_t len) |
| 172 | { |
| 173 | printf(".\n"); |
| 174 | intel_pt_dump(pt, buf, len); |
| 175 | } |
| 176 | |
| 177 | static int intel_pt_do_fix_overlap(struct intel_pt *pt, struct auxtrace_buffer *a, |
| 178 | struct auxtrace_buffer *b) |
| 179 | { |
| 180 | void *start; |
| 181 | |
| 182 | start = intel_pt_find_overlap(a->data, a->size, b->data, b->size, |
| 183 | pt->have_tsc); |
| 184 | if (!start) |
| 185 | return -EINVAL; |
| 186 | b->use_size = b->data + b->size - start; |
| 187 | b->use_data = start; |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | static void intel_pt_use_buffer_pid_tid(struct intel_pt_queue *ptq, |
| 192 | struct auxtrace_queue *queue, |
| 193 | struct auxtrace_buffer *buffer) |
| 194 | { |
| 195 | if (queue->cpu == -1 && buffer->cpu != -1) |
| 196 | ptq->cpu = buffer->cpu; |
| 197 | |
| 198 | ptq->pid = buffer->pid; |
| 199 | ptq->tid = buffer->tid; |
| 200 | |
| 201 | intel_pt_log("queue %u cpu %d pid %d tid %d\n", |
| 202 | ptq->queue_nr, ptq->cpu, ptq->pid, ptq->tid); |
| 203 | |
| 204 | thread__zput(ptq->thread); |
| 205 | |
| 206 | if (ptq->tid != -1) { |
| 207 | if (ptq->pid != -1) |
| 208 | ptq->thread = machine__findnew_thread(ptq->pt->machine, |
| 209 | ptq->pid, |
| 210 | ptq->tid); |
| 211 | else |
| 212 | ptq->thread = machine__find_thread(ptq->pt->machine, -1, |
| 213 | ptq->tid); |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | /* This function assumes data is processed sequentially only */ |
| 218 | static int intel_pt_get_trace(struct intel_pt_buffer *b, void *data) |
| 219 | { |
| 220 | struct intel_pt_queue *ptq = data; |
| 221 | struct auxtrace_buffer *buffer = ptq->buffer, *old_buffer = buffer; |
| 222 | struct auxtrace_queue *queue; |
| 223 | |
| 224 | if (ptq->stop) { |
| 225 | b->len = 0; |
| 226 | return 0; |
| 227 | } |
| 228 | |
| 229 | queue = &ptq->pt->queues.queue_array[ptq->queue_nr]; |
| 230 | |
| 231 | buffer = auxtrace_buffer__next(queue, buffer); |
| 232 | if (!buffer) { |
| 233 | if (old_buffer) |
| 234 | auxtrace_buffer__drop_data(old_buffer); |
| 235 | b->len = 0; |
| 236 | return 0; |
| 237 | } |
| 238 | |
| 239 | ptq->buffer = buffer; |
| 240 | |
| 241 | if (!buffer->data) { |
| 242 | int fd = perf_data_file__fd(ptq->pt->session->file); |
| 243 | |
| 244 | buffer->data = auxtrace_buffer__get_data(buffer, fd); |
| 245 | if (!buffer->data) |
| 246 | return -ENOMEM; |
| 247 | } |
| 248 | |
| 249 | if (ptq->pt->snapshot_mode && !buffer->consecutive && old_buffer && |
| 250 | intel_pt_do_fix_overlap(ptq->pt, old_buffer, buffer)) |
| 251 | return -ENOMEM; |
| 252 | |
| 253 | if (old_buffer) |
| 254 | auxtrace_buffer__drop_data(old_buffer); |
| 255 | |
| 256 | if (buffer->use_data) { |
| 257 | b->len = buffer->use_size; |
| 258 | b->buf = buffer->use_data; |
| 259 | } else { |
| 260 | b->len = buffer->size; |
| 261 | b->buf = buffer->data; |
| 262 | } |
| 263 | b->ref_timestamp = buffer->reference; |
| 264 | |
| 265 | if (!old_buffer || ptq->pt->sampling_mode || (ptq->pt->snapshot_mode && |
| 266 | !buffer->consecutive)) { |
| 267 | b->consecutive = false; |
| 268 | b->trace_nr = buffer->buffer_nr + 1; |
| 269 | } else { |
| 270 | b->consecutive = true; |
| 271 | } |
| 272 | |
| 273 | if (ptq->use_buffer_pid_tid && (ptq->pid != buffer->pid || |
| 274 | ptq->tid != buffer->tid)) |
| 275 | intel_pt_use_buffer_pid_tid(ptq, queue, buffer); |
| 276 | |
| 277 | if (ptq->step_through_buffers) |
| 278 | ptq->stop = true; |
| 279 | |
| 280 | if (!b->len) |
| 281 | return intel_pt_get_trace(b, data); |
| 282 | |
| 283 | return 0; |
| 284 | } |
| 285 | |
| 286 | struct intel_pt_cache_entry { |
| 287 | struct auxtrace_cache_entry entry; |
| 288 | u64 insn_cnt; |
| 289 | u64 byte_cnt; |
| 290 | enum intel_pt_insn_op op; |
| 291 | enum intel_pt_insn_branch branch; |
| 292 | int length; |
| 293 | int32_t rel; |
| 294 | }; |
| 295 | |
| 296 | static int intel_pt_config_div(const char *var, const char *value, void *data) |
| 297 | { |
| 298 | int *d = data; |
| 299 | long val; |
| 300 | |
| 301 | if (!strcmp(var, "intel-pt.cache-divisor")) { |
| 302 | val = strtol(value, NULL, 0); |
| 303 | if (val > 0 && val <= INT_MAX) |
| 304 | *d = val; |
| 305 | } |
| 306 | |
| 307 | return 0; |
| 308 | } |
| 309 | |
| 310 | static int intel_pt_cache_divisor(void) |
| 311 | { |
| 312 | static int d; |
| 313 | |
| 314 | if (d) |
| 315 | return d; |
| 316 | |
| 317 | perf_config(intel_pt_config_div, &d); |
| 318 | |
| 319 | if (!d) |
| 320 | d = 64; |
| 321 | |
| 322 | return d; |
| 323 | } |
| 324 | |
| 325 | static unsigned int intel_pt_cache_size(struct dso *dso, |
| 326 | struct machine *machine) |
| 327 | { |
| 328 | off_t size; |
| 329 | |
| 330 | size = dso__data_size(dso, machine); |
| 331 | size /= intel_pt_cache_divisor(); |
| 332 | if (size < 1000) |
| 333 | return 10; |
| 334 | if (size > (1 << 21)) |
| 335 | return 21; |
| 336 | return 32 - __builtin_clz(size); |
| 337 | } |
| 338 | |
| 339 | static struct auxtrace_cache *intel_pt_cache(struct dso *dso, |
| 340 | struct machine *machine) |
| 341 | { |
| 342 | struct auxtrace_cache *c; |
| 343 | unsigned int bits; |
| 344 | |
| 345 | if (dso->auxtrace_cache) |
| 346 | return dso->auxtrace_cache; |
| 347 | |
| 348 | bits = intel_pt_cache_size(dso, machine); |
| 349 | |
| 350 | /* Ignoring cache creation failure */ |
| 351 | c = auxtrace_cache__new(bits, sizeof(struct intel_pt_cache_entry), 200); |
| 352 | |
| 353 | dso->auxtrace_cache = c; |
| 354 | |
| 355 | return c; |
| 356 | } |
| 357 | |
| 358 | static int intel_pt_cache_add(struct dso *dso, struct machine *machine, |
| 359 | u64 offset, u64 insn_cnt, u64 byte_cnt, |
| 360 | struct intel_pt_insn *intel_pt_insn) |
| 361 | { |
| 362 | struct auxtrace_cache *c = intel_pt_cache(dso, machine); |
| 363 | struct intel_pt_cache_entry *e; |
| 364 | int err; |
| 365 | |
| 366 | if (!c) |
| 367 | return -ENOMEM; |
| 368 | |
| 369 | e = auxtrace_cache__alloc_entry(c); |
| 370 | if (!e) |
| 371 | return -ENOMEM; |
| 372 | |
| 373 | e->insn_cnt = insn_cnt; |
| 374 | e->byte_cnt = byte_cnt; |
| 375 | e->op = intel_pt_insn->op; |
| 376 | e->branch = intel_pt_insn->branch; |
| 377 | e->length = intel_pt_insn->length; |
| 378 | e->rel = intel_pt_insn->rel; |
| 379 | |
| 380 | err = auxtrace_cache__add(c, offset, &e->entry); |
| 381 | if (err) |
| 382 | auxtrace_cache__free_entry(c, e); |
| 383 | |
| 384 | return err; |
| 385 | } |
| 386 | |
| 387 | static struct intel_pt_cache_entry * |
| 388 | intel_pt_cache_lookup(struct dso *dso, struct machine *machine, u64 offset) |
| 389 | { |
| 390 | struct auxtrace_cache *c = intel_pt_cache(dso, machine); |
| 391 | |
| 392 | if (!c) |
| 393 | return NULL; |
| 394 | |
| 395 | return auxtrace_cache__lookup(dso->auxtrace_cache, offset); |
| 396 | } |
| 397 | |
| 398 | static int intel_pt_walk_next_insn(struct intel_pt_insn *intel_pt_insn, |
| 399 | uint64_t *insn_cnt_ptr, uint64_t *ip, |
| 400 | uint64_t to_ip, uint64_t max_insn_cnt, |
| 401 | void *data) |
| 402 | { |
| 403 | struct intel_pt_queue *ptq = data; |
| 404 | struct machine *machine = ptq->pt->machine; |
| 405 | struct thread *thread; |
| 406 | struct addr_location al; |
| 407 | unsigned char buf[1024]; |
| 408 | size_t bufsz; |
| 409 | ssize_t len; |
| 410 | int x86_64; |
| 411 | u8 cpumode; |
| 412 | u64 offset, start_offset, start_ip; |
| 413 | u64 insn_cnt = 0; |
| 414 | bool one_map = true; |
| 415 | |
| 416 | if (to_ip && *ip == to_ip) |
| 417 | goto out_no_cache; |
| 418 | |
| 419 | bufsz = intel_pt_insn_max_size(); |
| 420 | |
| 421 | if (*ip >= ptq->pt->kernel_start) |
| 422 | cpumode = PERF_RECORD_MISC_KERNEL; |
| 423 | else |
| 424 | cpumode = PERF_RECORD_MISC_USER; |
| 425 | |
| 426 | thread = ptq->thread; |
| 427 | if (!thread) { |
| 428 | if (cpumode != PERF_RECORD_MISC_KERNEL) |
| 429 | return -EINVAL; |
| 430 | thread = ptq->pt->unknown_thread; |
| 431 | } |
| 432 | |
| 433 | while (1) { |
| 434 | thread__find_addr_map(thread, cpumode, MAP__FUNCTION, *ip, &al); |
| 435 | if (!al.map || !al.map->dso) |
| 436 | return -EINVAL; |
| 437 | |
| 438 | if (al.map->dso->data.status == DSO_DATA_STATUS_ERROR && |
| 439 | dso__data_status_seen(al.map->dso, |
| 440 | DSO_DATA_STATUS_SEEN_ITRACE)) |
| 441 | return -ENOENT; |
| 442 | |
| 443 | offset = al.map->map_ip(al.map, *ip); |
| 444 | |
| 445 | if (!to_ip && one_map) { |
| 446 | struct intel_pt_cache_entry *e; |
| 447 | |
| 448 | e = intel_pt_cache_lookup(al.map->dso, machine, offset); |
| 449 | if (e && |
| 450 | (!max_insn_cnt || e->insn_cnt <= max_insn_cnt)) { |
| 451 | *insn_cnt_ptr = e->insn_cnt; |
| 452 | *ip += e->byte_cnt; |
| 453 | intel_pt_insn->op = e->op; |
| 454 | intel_pt_insn->branch = e->branch; |
| 455 | intel_pt_insn->length = e->length; |
| 456 | intel_pt_insn->rel = e->rel; |
| 457 | intel_pt_log_insn_no_data(intel_pt_insn, *ip); |
| 458 | return 0; |
| 459 | } |
| 460 | } |
| 461 | |
| 462 | start_offset = offset; |
| 463 | start_ip = *ip; |
| 464 | |
| 465 | /* Load maps to ensure dso->is_64_bit has been updated */ |
| 466 | map__load(al.map, machine->symbol_filter); |
| 467 | |
| 468 | x86_64 = al.map->dso->is_64_bit; |
| 469 | |
| 470 | while (1) { |
| 471 | len = dso__data_read_offset(al.map->dso, machine, |
| 472 | offset, buf, bufsz); |
| 473 | if (len <= 0) |
| 474 | return -EINVAL; |
| 475 | |
| 476 | if (intel_pt_get_insn(buf, len, x86_64, intel_pt_insn)) |
| 477 | return -EINVAL; |
| 478 | |
| 479 | intel_pt_log_insn(intel_pt_insn, *ip); |
| 480 | |
| 481 | insn_cnt += 1; |
| 482 | |
| 483 | if (intel_pt_insn->branch != INTEL_PT_BR_NO_BRANCH) |
| 484 | goto out; |
| 485 | |
| 486 | if (max_insn_cnt && insn_cnt >= max_insn_cnt) |
| 487 | goto out_no_cache; |
| 488 | |
| 489 | *ip += intel_pt_insn->length; |
| 490 | |
| 491 | if (to_ip && *ip == to_ip) |
| 492 | goto out_no_cache; |
| 493 | |
| 494 | if (*ip >= al.map->end) |
| 495 | break; |
| 496 | |
| 497 | offset += intel_pt_insn->length; |
| 498 | } |
| 499 | one_map = false; |
| 500 | } |
| 501 | out: |
| 502 | *insn_cnt_ptr = insn_cnt; |
| 503 | |
| 504 | if (!one_map) |
| 505 | goto out_no_cache; |
| 506 | |
| 507 | /* |
| 508 | * Didn't lookup in the 'to_ip' case, so do it now to prevent duplicate |
| 509 | * entries. |
| 510 | */ |
| 511 | if (to_ip) { |
| 512 | struct intel_pt_cache_entry *e; |
| 513 | |
| 514 | e = intel_pt_cache_lookup(al.map->dso, machine, start_offset); |
| 515 | if (e) |
| 516 | return 0; |
| 517 | } |
| 518 | |
| 519 | /* Ignore cache errors */ |
| 520 | intel_pt_cache_add(al.map->dso, machine, start_offset, insn_cnt, |
| 521 | *ip - start_ip, intel_pt_insn); |
| 522 | |
| 523 | return 0; |
| 524 | |
| 525 | out_no_cache: |
| 526 | *insn_cnt_ptr = insn_cnt; |
| 527 | return 0; |
| 528 | } |
| 529 | |
| 530 | static bool intel_pt_get_config(struct intel_pt *pt, |
| 531 | struct perf_event_attr *attr, u64 *config) |
| 532 | { |
| 533 | if (attr->type == pt->pmu_type) { |
| 534 | if (config) |
| 535 | *config = attr->config; |
| 536 | return true; |
| 537 | } |
| 538 | |
| 539 | return false; |
| 540 | } |
| 541 | |
| 542 | static bool intel_pt_exclude_kernel(struct intel_pt *pt) |
| 543 | { |
| 544 | struct perf_evsel *evsel; |
| 545 | |
| 546 | evlist__for_each(pt->session->evlist, evsel) { |
| 547 | if (intel_pt_get_config(pt, &evsel->attr, NULL) && |
| 548 | !evsel->attr.exclude_kernel) |
| 549 | return false; |
| 550 | } |
| 551 | return true; |
| 552 | } |
| 553 | |
| 554 | static bool intel_pt_return_compression(struct intel_pt *pt) |
| 555 | { |
| 556 | struct perf_evsel *evsel; |
| 557 | u64 config; |
| 558 | |
| 559 | if (!pt->noretcomp_bit) |
| 560 | return true; |
| 561 | |
| 562 | evlist__for_each(pt->session->evlist, evsel) { |
| 563 | if (intel_pt_get_config(pt, &evsel->attr, &config) && |
| 564 | (config & pt->noretcomp_bit)) |
| 565 | return false; |
| 566 | } |
| 567 | return true; |
| 568 | } |
| 569 | |
| 570 | static bool intel_pt_timeless_decoding(struct intel_pt *pt) |
| 571 | { |
| 572 | struct perf_evsel *evsel; |
| 573 | bool timeless_decoding = true; |
| 574 | u64 config; |
| 575 | |
| 576 | if (!pt->tsc_bit || !pt->cap_user_time_zero) |
| 577 | return true; |
| 578 | |
| 579 | evlist__for_each(pt->session->evlist, evsel) { |
| 580 | if (!(evsel->attr.sample_type & PERF_SAMPLE_TIME)) |
| 581 | return true; |
| 582 | if (intel_pt_get_config(pt, &evsel->attr, &config)) { |
| 583 | if (config & pt->tsc_bit) |
| 584 | timeless_decoding = false; |
| 585 | else |
| 586 | return true; |
| 587 | } |
| 588 | } |
| 589 | return timeless_decoding; |
| 590 | } |
| 591 | |
| 592 | static bool intel_pt_tracing_kernel(struct intel_pt *pt) |
| 593 | { |
| 594 | struct perf_evsel *evsel; |
| 595 | |
| 596 | evlist__for_each(pt->session->evlist, evsel) { |
| 597 | if (intel_pt_get_config(pt, &evsel->attr, NULL) && |
| 598 | !evsel->attr.exclude_kernel) |
| 599 | return true; |
| 600 | } |
| 601 | return false; |
| 602 | } |
| 603 | |
| 604 | static bool intel_pt_have_tsc(struct intel_pt *pt) |
| 605 | { |
| 606 | struct perf_evsel *evsel; |
| 607 | bool have_tsc = false; |
| 608 | u64 config; |
| 609 | |
| 610 | if (!pt->tsc_bit) |
| 611 | return false; |
| 612 | |
| 613 | evlist__for_each(pt->session->evlist, evsel) { |
| 614 | if (intel_pt_get_config(pt, &evsel->attr, &config)) { |
| 615 | if (config & pt->tsc_bit) |
| 616 | have_tsc = true; |
| 617 | else |
| 618 | return false; |
| 619 | } |
| 620 | } |
| 621 | return have_tsc; |
| 622 | } |
| 623 | |
| 624 | static u64 intel_pt_ns_to_ticks(const struct intel_pt *pt, u64 ns) |
| 625 | { |
| 626 | u64 quot, rem; |
| 627 | |
| 628 | quot = ns / pt->tc.time_mult; |
| 629 | rem = ns % pt->tc.time_mult; |
| 630 | return (quot << pt->tc.time_shift) + (rem << pt->tc.time_shift) / |
| 631 | pt->tc.time_mult; |
| 632 | } |
| 633 | |
| 634 | static struct intel_pt_queue *intel_pt_alloc_queue(struct intel_pt *pt, |
| 635 | unsigned int queue_nr) |
| 636 | { |
| 637 | struct intel_pt_params params = { .get_trace = 0, }; |
| 638 | struct intel_pt_queue *ptq; |
| 639 | |
| 640 | ptq = zalloc(sizeof(struct intel_pt_queue)); |
| 641 | if (!ptq) |
| 642 | return NULL; |
| 643 | |
| 644 | if (pt->synth_opts.callchain) { |
| 645 | size_t sz = sizeof(struct ip_callchain); |
| 646 | |
| 647 | sz += pt->synth_opts.callchain_sz * sizeof(u64); |
| 648 | ptq->chain = zalloc(sz); |
| 649 | if (!ptq->chain) |
| 650 | goto out_free; |
| 651 | } |
| 652 | |
| 653 | ptq->event_buf = malloc(PERF_SAMPLE_MAX_SIZE); |
| 654 | if (!ptq->event_buf) |
| 655 | goto out_free; |
| 656 | |
| 657 | ptq->pt = pt; |
| 658 | ptq->queue_nr = queue_nr; |
| 659 | ptq->exclude_kernel = intel_pt_exclude_kernel(pt); |
| 660 | ptq->pid = -1; |
| 661 | ptq->tid = -1; |
| 662 | ptq->cpu = -1; |
| 663 | ptq->next_tid = -1; |
| 664 | |
| 665 | params.get_trace = intel_pt_get_trace; |
| 666 | params.walk_insn = intel_pt_walk_next_insn; |
| 667 | params.data = ptq; |
| 668 | params.return_compression = intel_pt_return_compression(pt); |
| 669 | params.max_non_turbo_ratio = pt->max_non_turbo_ratio; |
| 670 | |
| 671 | if (pt->synth_opts.instructions) { |
| 672 | if (pt->synth_opts.period) { |
| 673 | switch (pt->synth_opts.period_type) { |
| 674 | case PERF_ITRACE_PERIOD_INSTRUCTIONS: |
| 675 | params.period_type = |
| 676 | INTEL_PT_PERIOD_INSTRUCTIONS; |
| 677 | params.period = pt->synth_opts.period; |
| 678 | break; |
| 679 | case PERF_ITRACE_PERIOD_TICKS: |
| 680 | params.period_type = INTEL_PT_PERIOD_TICKS; |
| 681 | params.period = pt->synth_opts.period; |
| 682 | break; |
| 683 | case PERF_ITRACE_PERIOD_NANOSECS: |
| 684 | params.period_type = INTEL_PT_PERIOD_TICKS; |
| 685 | params.period = intel_pt_ns_to_ticks(pt, |
| 686 | pt->synth_opts.period); |
| 687 | break; |
| 688 | default: |
| 689 | break; |
| 690 | } |
| 691 | } |
| 692 | |
| 693 | if (!params.period) { |
| 694 | params.period_type = INTEL_PT_PERIOD_INSTRUCTIONS; |
| 695 | params.period = 1000; |
| 696 | } |
| 697 | } |
| 698 | |
| 699 | ptq->decoder = intel_pt_decoder_new(¶ms); |
| 700 | if (!ptq->decoder) |
| 701 | goto out_free; |
| 702 | |
| 703 | return ptq; |
| 704 | |
| 705 | out_free: |
| 706 | zfree(&ptq->event_buf); |
| 707 | zfree(&ptq->chain); |
| 708 | free(ptq); |
| 709 | return NULL; |
| 710 | } |
| 711 | |
| 712 | static void intel_pt_free_queue(void *priv) |
| 713 | { |
| 714 | struct intel_pt_queue *ptq = priv; |
| 715 | |
| 716 | if (!ptq) |
| 717 | return; |
| 718 | thread__zput(ptq->thread); |
| 719 | intel_pt_decoder_free(ptq->decoder); |
| 720 | zfree(&ptq->event_buf); |
| 721 | zfree(&ptq->chain); |
| 722 | free(ptq); |
| 723 | } |
| 724 | |
| 725 | static void intel_pt_set_pid_tid_cpu(struct intel_pt *pt, |
| 726 | struct auxtrace_queue *queue) |
| 727 | { |
| 728 | struct intel_pt_queue *ptq = queue->priv; |
| 729 | |
| 730 | if (queue->tid == -1 || pt->have_sched_switch) { |
| 731 | ptq->tid = machine__get_current_tid(pt->machine, ptq->cpu); |
| 732 | thread__zput(ptq->thread); |
| 733 | } |
| 734 | |
| 735 | if (!ptq->thread && ptq->tid != -1) |
| 736 | ptq->thread = machine__find_thread(pt->machine, -1, ptq->tid); |
| 737 | |
| 738 | if (ptq->thread) { |
| 739 | ptq->pid = ptq->thread->pid_; |
| 740 | if (queue->cpu == -1) |
| 741 | ptq->cpu = ptq->thread->cpu; |
| 742 | } |
| 743 | } |
| 744 | |
| 745 | static void intel_pt_sample_flags(struct intel_pt_queue *ptq) |
| 746 | { |
| 747 | if (ptq->state->flags & INTEL_PT_ABORT_TX) { |
| 748 | ptq->flags = PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TX_ABORT; |
| 749 | } else if (ptq->state->flags & INTEL_PT_ASYNC) { |
| 750 | if (ptq->state->to_ip) |
| 751 | ptq->flags = PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | |
| 752 | PERF_IP_FLAG_ASYNC | |
| 753 | PERF_IP_FLAG_INTERRUPT; |
| 754 | else |
| 755 | ptq->flags = PERF_IP_FLAG_BRANCH | |
| 756 | PERF_IP_FLAG_TRACE_END; |
| 757 | ptq->insn_len = 0; |
| 758 | } else { |
| 759 | if (ptq->state->from_ip) |
| 760 | ptq->flags = intel_pt_insn_type(ptq->state->insn_op); |
| 761 | else |
| 762 | ptq->flags = PERF_IP_FLAG_BRANCH | |
| 763 | PERF_IP_FLAG_TRACE_BEGIN; |
| 764 | if (ptq->state->flags & INTEL_PT_IN_TX) |
| 765 | ptq->flags |= PERF_IP_FLAG_IN_TX; |
| 766 | ptq->insn_len = ptq->state->insn_len; |
| 767 | } |
| 768 | } |
| 769 | |
| 770 | static int intel_pt_setup_queue(struct intel_pt *pt, |
| 771 | struct auxtrace_queue *queue, |
| 772 | unsigned int queue_nr) |
| 773 | { |
| 774 | struct intel_pt_queue *ptq = queue->priv; |
| 775 | |
| 776 | if (list_empty(&queue->head)) |
| 777 | return 0; |
| 778 | |
| 779 | if (!ptq) { |
| 780 | ptq = intel_pt_alloc_queue(pt, queue_nr); |
| 781 | if (!ptq) |
| 782 | return -ENOMEM; |
| 783 | queue->priv = ptq; |
| 784 | |
| 785 | if (queue->cpu != -1) |
| 786 | ptq->cpu = queue->cpu; |
| 787 | ptq->tid = queue->tid; |
| 788 | |
| 789 | if (pt->sampling_mode) { |
| 790 | if (pt->timeless_decoding) |
| 791 | ptq->step_through_buffers = true; |
| 792 | if (pt->timeless_decoding || !pt->have_sched_switch) |
| 793 | ptq->use_buffer_pid_tid = true; |
| 794 | } |
| 795 | } |
| 796 | |
| 797 | if (!ptq->on_heap && |
| 798 | (!pt->sync_switch || |
| 799 | ptq->switch_state != INTEL_PT_SS_EXPECTING_SWITCH_EVENT)) { |
| 800 | const struct intel_pt_state *state; |
| 801 | int ret; |
| 802 | |
| 803 | if (pt->timeless_decoding) |
| 804 | return 0; |
| 805 | |
| 806 | intel_pt_log("queue %u getting timestamp\n", queue_nr); |
| 807 | intel_pt_log("queue %u decoding cpu %d pid %d tid %d\n", |
| 808 | queue_nr, ptq->cpu, ptq->pid, ptq->tid); |
| 809 | while (1) { |
| 810 | state = intel_pt_decode(ptq->decoder); |
| 811 | if (state->err) { |
| 812 | if (state->err == INTEL_PT_ERR_NODATA) { |
| 813 | intel_pt_log("queue %u has no timestamp\n", |
| 814 | queue_nr); |
| 815 | return 0; |
| 816 | } |
| 817 | continue; |
| 818 | } |
| 819 | if (state->timestamp) |
| 820 | break; |
| 821 | } |
| 822 | |
| 823 | ptq->timestamp = state->timestamp; |
| 824 | intel_pt_log("queue %u timestamp 0x%" PRIx64 "\n", |
| 825 | queue_nr, ptq->timestamp); |
| 826 | ptq->state = state; |
| 827 | ptq->have_sample = true; |
| 828 | intel_pt_sample_flags(ptq); |
| 829 | ret = auxtrace_heap__add(&pt->heap, queue_nr, ptq->timestamp); |
| 830 | if (ret) |
| 831 | return ret; |
| 832 | ptq->on_heap = true; |
| 833 | } |
| 834 | |
| 835 | return 0; |
| 836 | } |
| 837 | |
| 838 | static int intel_pt_setup_queues(struct intel_pt *pt) |
| 839 | { |
| 840 | unsigned int i; |
| 841 | int ret; |
| 842 | |
| 843 | for (i = 0; i < pt->queues.nr_queues; i++) { |
| 844 | ret = intel_pt_setup_queue(pt, &pt->queues.queue_array[i], i); |
| 845 | if (ret) |
| 846 | return ret; |
| 847 | } |
| 848 | return 0; |
| 849 | } |
| 850 | |
| 851 | static int intel_pt_inject_event(union perf_event *event, |
| 852 | struct perf_sample *sample, u64 type, |
| 853 | bool swapped) |
| 854 | { |
| 855 | event->header.size = perf_event__sample_event_size(sample, type, 0); |
| 856 | return perf_event__synthesize_sample(event, type, 0, sample, swapped); |
| 857 | } |
| 858 | |
| 859 | static int intel_pt_synth_branch_sample(struct intel_pt_queue *ptq) |
| 860 | { |
| 861 | int ret; |
| 862 | struct intel_pt *pt = ptq->pt; |
| 863 | union perf_event *event = ptq->event_buf; |
| 864 | struct perf_sample sample = { .ip = 0, }; |
| 865 | |
| 866 | event->sample.header.type = PERF_RECORD_SAMPLE; |
| 867 | event->sample.header.misc = PERF_RECORD_MISC_USER; |
| 868 | event->sample.header.size = sizeof(struct perf_event_header); |
| 869 | |
| 870 | if (!pt->timeless_decoding) |
| 871 | sample.time = tsc_to_perf_time(ptq->timestamp, &pt->tc); |
| 872 | |
| 873 | sample.ip = ptq->state->from_ip; |
| 874 | sample.pid = ptq->pid; |
| 875 | sample.tid = ptq->tid; |
| 876 | sample.addr = ptq->state->to_ip; |
| 877 | sample.id = ptq->pt->branches_id; |
| 878 | sample.stream_id = ptq->pt->branches_id; |
| 879 | sample.period = 1; |
| 880 | sample.cpu = ptq->cpu; |
| 881 | sample.flags = ptq->flags; |
| 882 | sample.insn_len = ptq->insn_len; |
| 883 | |
| 884 | if (pt->branches_filter && !(pt->branches_filter & ptq->flags)) |
| 885 | return 0; |
| 886 | |
| 887 | if (pt->synth_opts.inject) { |
| 888 | ret = intel_pt_inject_event(event, &sample, |
| 889 | pt->branches_sample_type, |
| 890 | pt->synth_needs_swap); |
| 891 | if (ret) |
| 892 | return ret; |
| 893 | } |
| 894 | |
| 895 | ret = perf_session__deliver_synth_event(pt->session, event, &sample); |
| 896 | if (ret) |
| 897 | pr_err("Intel Processor Trace: failed to deliver branch event, error %d\n", |
| 898 | ret); |
| 899 | |
| 900 | return ret; |
| 901 | } |
| 902 | |
| 903 | static int intel_pt_synth_instruction_sample(struct intel_pt_queue *ptq) |
| 904 | { |
| 905 | int ret; |
| 906 | struct intel_pt *pt = ptq->pt; |
| 907 | union perf_event *event = ptq->event_buf; |
| 908 | struct perf_sample sample = { .ip = 0, }; |
| 909 | |
| 910 | event->sample.header.type = PERF_RECORD_SAMPLE; |
| 911 | event->sample.header.misc = PERF_RECORD_MISC_USER; |
| 912 | event->sample.header.size = sizeof(struct perf_event_header); |
| 913 | |
| 914 | if (!pt->timeless_decoding) |
| 915 | sample.time = tsc_to_perf_time(ptq->timestamp, &pt->tc); |
| 916 | |
| 917 | sample.ip = ptq->state->from_ip; |
| 918 | sample.pid = ptq->pid; |
| 919 | sample.tid = ptq->tid; |
| 920 | sample.addr = ptq->state->to_ip; |
| 921 | sample.id = ptq->pt->instructions_id; |
| 922 | sample.stream_id = ptq->pt->instructions_id; |
| 923 | sample.period = ptq->pt->instructions_sample_period; |
| 924 | sample.cpu = ptq->cpu; |
| 925 | sample.flags = ptq->flags; |
| 926 | sample.insn_len = ptq->insn_len; |
| 927 | |
| 928 | if (pt->synth_opts.callchain) { |
| 929 | thread_stack__sample(ptq->thread, ptq->chain, |
| 930 | pt->synth_opts.callchain_sz, sample.ip); |
| 931 | sample.callchain = ptq->chain; |
| 932 | } |
| 933 | |
| 934 | if (pt->synth_opts.inject) { |
| 935 | ret = intel_pt_inject_event(event, &sample, |
| 936 | pt->instructions_sample_type, |
| 937 | pt->synth_needs_swap); |
| 938 | if (ret) |
| 939 | return ret; |
| 940 | } |
| 941 | |
| 942 | ret = perf_session__deliver_synth_event(pt->session, event, &sample); |
| 943 | if (ret) |
| 944 | pr_err("Intel Processor Trace: failed to deliver instruction event, error %d\n", |
| 945 | ret); |
| 946 | |
| 947 | return ret; |
| 948 | } |
| 949 | |
| 950 | static int intel_pt_synth_transaction_sample(struct intel_pt_queue *ptq) |
| 951 | { |
| 952 | int ret; |
| 953 | struct intel_pt *pt = ptq->pt; |
| 954 | union perf_event *event = ptq->event_buf; |
| 955 | struct perf_sample sample = { .ip = 0, }; |
| 956 | |
| 957 | event->sample.header.type = PERF_RECORD_SAMPLE; |
| 958 | event->sample.header.misc = PERF_RECORD_MISC_USER; |
| 959 | event->sample.header.size = sizeof(struct perf_event_header); |
| 960 | |
| 961 | if (!pt->timeless_decoding) |
| 962 | sample.time = tsc_to_perf_time(ptq->timestamp, &pt->tc); |
| 963 | |
| 964 | sample.ip = ptq->state->from_ip; |
| 965 | sample.pid = ptq->pid; |
| 966 | sample.tid = ptq->tid; |
| 967 | sample.addr = ptq->state->to_ip; |
| 968 | sample.id = ptq->pt->transactions_id; |
| 969 | sample.stream_id = ptq->pt->transactions_id; |
| 970 | sample.period = 1; |
| 971 | sample.cpu = ptq->cpu; |
| 972 | sample.flags = ptq->flags; |
| 973 | sample.insn_len = ptq->insn_len; |
| 974 | |
| 975 | if (pt->synth_opts.callchain) { |
| 976 | thread_stack__sample(ptq->thread, ptq->chain, |
| 977 | pt->synth_opts.callchain_sz, sample.ip); |
| 978 | sample.callchain = ptq->chain; |
| 979 | } |
| 980 | |
| 981 | if (pt->synth_opts.inject) { |
| 982 | ret = intel_pt_inject_event(event, &sample, |
| 983 | pt->transactions_sample_type, |
| 984 | pt->synth_needs_swap); |
| 985 | if (ret) |
| 986 | return ret; |
| 987 | } |
| 988 | |
| 989 | ret = perf_session__deliver_synth_event(pt->session, event, &sample); |
| 990 | if (ret) |
| 991 | pr_err("Intel Processor Trace: failed to deliver transaction event, error %d\n", |
| 992 | ret); |
| 993 | |
| 994 | return ret; |
| 995 | } |
| 996 | |
| 997 | static int intel_pt_synth_error(struct intel_pt *pt, int code, int cpu, |
| 998 | pid_t pid, pid_t tid, u64 ip) |
| 999 | { |
| 1000 | union perf_event event; |
| 1001 | char msg[MAX_AUXTRACE_ERROR_MSG]; |
| 1002 | int err; |
| 1003 | |
| 1004 | intel_pt__strerror(code, msg, MAX_AUXTRACE_ERROR_MSG); |
| 1005 | |
| 1006 | auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE, |
| 1007 | code, cpu, pid, tid, ip, msg); |
| 1008 | |
| 1009 | err = perf_session__deliver_synth_event(pt->session, &event, NULL); |
| 1010 | if (err) |
| 1011 | pr_err("Intel Processor Trace: failed to deliver error event, error %d\n", |
| 1012 | err); |
| 1013 | |
| 1014 | return err; |
| 1015 | } |
| 1016 | |
| 1017 | static int intel_pt_next_tid(struct intel_pt *pt, struct intel_pt_queue *ptq) |
| 1018 | { |
| 1019 | struct auxtrace_queue *queue; |
| 1020 | pid_t tid = ptq->next_tid; |
| 1021 | int err; |
| 1022 | |
| 1023 | if (tid == -1) |
| 1024 | return 0; |
| 1025 | |
| 1026 | intel_pt_log("switch: cpu %d tid %d\n", ptq->cpu, tid); |
| 1027 | |
| 1028 | err = machine__set_current_tid(pt->machine, ptq->cpu, -1, tid); |
| 1029 | |
| 1030 | queue = &pt->queues.queue_array[ptq->queue_nr]; |
| 1031 | intel_pt_set_pid_tid_cpu(pt, queue); |
| 1032 | |
| 1033 | ptq->next_tid = -1; |
| 1034 | |
| 1035 | return err; |
| 1036 | } |
| 1037 | |
| 1038 | static inline bool intel_pt_is_switch_ip(struct intel_pt_queue *ptq, u64 ip) |
| 1039 | { |
| 1040 | struct intel_pt *pt = ptq->pt; |
| 1041 | |
| 1042 | return ip == pt->switch_ip && |
| 1043 | (ptq->flags & PERF_IP_FLAG_BRANCH) && |
| 1044 | !(ptq->flags & (PERF_IP_FLAG_CONDITIONAL | PERF_IP_FLAG_ASYNC | |
| 1045 | PERF_IP_FLAG_INTERRUPT | PERF_IP_FLAG_TX_ABORT)); |
| 1046 | } |
| 1047 | |
| 1048 | static int intel_pt_sample(struct intel_pt_queue *ptq) |
| 1049 | { |
| 1050 | const struct intel_pt_state *state = ptq->state; |
| 1051 | struct intel_pt *pt = ptq->pt; |
| 1052 | int err; |
| 1053 | |
| 1054 | if (!ptq->have_sample) |
| 1055 | return 0; |
| 1056 | |
| 1057 | ptq->have_sample = false; |
| 1058 | |
| 1059 | if (pt->sample_instructions && |
| 1060 | (state->type & INTEL_PT_INSTRUCTION)) { |
| 1061 | err = intel_pt_synth_instruction_sample(ptq); |
| 1062 | if (err) |
| 1063 | return err; |
| 1064 | } |
| 1065 | |
| 1066 | if (pt->sample_transactions && |
| 1067 | (state->type & INTEL_PT_TRANSACTION)) { |
| 1068 | err = intel_pt_synth_transaction_sample(ptq); |
| 1069 | if (err) |
| 1070 | return err; |
| 1071 | } |
| 1072 | |
| 1073 | if (!(state->type & INTEL_PT_BRANCH)) |
| 1074 | return 0; |
| 1075 | |
| 1076 | if (pt->synth_opts.callchain) |
| 1077 | thread_stack__event(ptq->thread, ptq->flags, state->from_ip, |
| 1078 | state->to_ip, ptq->insn_len, |
| 1079 | state->trace_nr); |
| 1080 | else |
| 1081 | thread_stack__set_trace_nr(ptq->thread, state->trace_nr); |
| 1082 | |
| 1083 | if (pt->sample_branches) { |
| 1084 | err = intel_pt_synth_branch_sample(ptq); |
| 1085 | if (err) |
| 1086 | return err; |
| 1087 | } |
| 1088 | |
| 1089 | if (!pt->sync_switch) |
| 1090 | return 0; |
| 1091 | |
| 1092 | if (intel_pt_is_switch_ip(ptq, state->to_ip)) { |
| 1093 | switch (ptq->switch_state) { |
| 1094 | case INTEL_PT_SS_UNKNOWN: |
| 1095 | case INTEL_PT_SS_EXPECTING_SWITCH_IP: |
| 1096 | err = intel_pt_next_tid(pt, ptq); |
| 1097 | if (err) |
| 1098 | return err; |
| 1099 | ptq->switch_state = INTEL_PT_SS_TRACING; |
| 1100 | break; |
| 1101 | default: |
| 1102 | ptq->switch_state = INTEL_PT_SS_EXPECTING_SWITCH_EVENT; |
| 1103 | return 1; |
| 1104 | } |
| 1105 | } else if (!state->to_ip) { |
| 1106 | ptq->switch_state = INTEL_PT_SS_NOT_TRACING; |
| 1107 | } else if (ptq->switch_state == INTEL_PT_SS_NOT_TRACING) { |
| 1108 | ptq->switch_state = INTEL_PT_SS_UNKNOWN; |
| 1109 | } else if (ptq->switch_state == INTEL_PT_SS_UNKNOWN && |
| 1110 | state->to_ip == pt->ptss_ip && |
| 1111 | (ptq->flags & PERF_IP_FLAG_CALL)) { |
| 1112 | ptq->switch_state = INTEL_PT_SS_TRACING; |
| 1113 | } |
| 1114 | |
| 1115 | return 0; |
| 1116 | } |
| 1117 | |
| 1118 | static u64 intel_pt_switch_ip(struct machine *machine, u64 *ptss_ip) |
| 1119 | { |
| 1120 | struct map *map; |
| 1121 | struct symbol *sym, *start; |
| 1122 | u64 ip, switch_ip = 0; |
| 1123 | |
| 1124 | if (ptss_ip) |
| 1125 | *ptss_ip = 0; |
| 1126 | |
| 1127 | map = machine__kernel_map(machine, MAP__FUNCTION); |
| 1128 | if (!map) |
| 1129 | return 0; |
| 1130 | |
| 1131 | if (map__load(map, machine->symbol_filter)) |
| 1132 | return 0; |
| 1133 | |
| 1134 | start = dso__first_symbol(map->dso, MAP__FUNCTION); |
| 1135 | |
| 1136 | for (sym = start; sym; sym = dso__next_symbol(sym)) { |
| 1137 | if (sym->binding == STB_GLOBAL && |
| 1138 | !strcmp(sym->name, "__switch_to")) { |
| 1139 | ip = map->unmap_ip(map, sym->start); |
| 1140 | if (ip >= map->start && ip < map->end) { |
| 1141 | switch_ip = ip; |
| 1142 | break; |
| 1143 | } |
| 1144 | } |
| 1145 | } |
| 1146 | |
| 1147 | if (!switch_ip || !ptss_ip) |
| 1148 | return 0; |
| 1149 | |
| 1150 | for (sym = start; sym; sym = dso__next_symbol(sym)) { |
| 1151 | if (!strcmp(sym->name, "perf_trace_sched_switch")) { |
| 1152 | ip = map->unmap_ip(map, sym->start); |
| 1153 | if (ip >= map->start && ip < map->end) { |
| 1154 | *ptss_ip = ip; |
| 1155 | break; |
| 1156 | } |
| 1157 | } |
| 1158 | } |
| 1159 | |
| 1160 | return switch_ip; |
| 1161 | } |
| 1162 | |
| 1163 | static int intel_pt_run_decoder(struct intel_pt_queue *ptq, u64 *timestamp) |
| 1164 | { |
| 1165 | const struct intel_pt_state *state = ptq->state; |
| 1166 | struct intel_pt *pt = ptq->pt; |
| 1167 | int err; |
| 1168 | |
| 1169 | if (!pt->kernel_start) { |
| 1170 | pt->kernel_start = machine__kernel_start(pt->machine); |
| 1171 | if (pt->per_cpu_mmaps && pt->have_sched_switch && |
| 1172 | !pt->timeless_decoding && intel_pt_tracing_kernel(pt) && |
| 1173 | !pt->sampling_mode) { |
| 1174 | pt->switch_ip = intel_pt_switch_ip(pt->machine, |
| 1175 | &pt->ptss_ip); |
| 1176 | if (pt->switch_ip) { |
| 1177 | intel_pt_log("switch_ip: %"PRIx64" ptss_ip: %"PRIx64"\n", |
| 1178 | pt->switch_ip, pt->ptss_ip); |
| 1179 | pt->sync_switch = true; |
| 1180 | } |
| 1181 | } |
| 1182 | } |
| 1183 | |
| 1184 | intel_pt_log("queue %u decoding cpu %d pid %d tid %d\n", |
| 1185 | ptq->queue_nr, ptq->cpu, ptq->pid, ptq->tid); |
| 1186 | while (1) { |
| 1187 | err = intel_pt_sample(ptq); |
| 1188 | if (err) |
| 1189 | return err; |
| 1190 | |
| 1191 | state = intel_pt_decode(ptq->decoder); |
| 1192 | if (state->err) { |
| 1193 | if (state->err == INTEL_PT_ERR_NODATA) |
| 1194 | return 1; |
| 1195 | if (pt->sync_switch && |
| 1196 | state->from_ip >= pt->kernel_start) { |
| 1197 | pt->sync_switch = false; |
| 1198 | intel_pt_next_tid(pt, ptq); |
| 1199 | } |
| 1200 | if (pt->synth_opts.errors) { |
| 1201 | err = intel_pt_synth_error(pt, state->err, |
| 1202 | ptq->cpu, ptq->pid, |
| 1203 | ptq->tid, |
| 1204 | state->from_ip); |
| 1205 | if (err) |
| 1206 | return err; |
| 1207 | } |
| 1208 | continue; |
| 1209 | } |
| 1210 | |
| 1211 | ptq->state = state; |
| 1212 | ptq->have_sample = true; |
| 1213 | intel_pt_sample_flags(ptq); |
| 1214 | |
| 1215 | /* Use estimated TSC upon return to user space */ |
| 1216 | if (pt->est_tsc && |
| 1217 | (state->from_ip >= pt->kernel_start || !state->from_ip) && |
| 1218 | state->to_ip && state->to_ip < pt->kernel_start) { |
| 1219 | intel_pt_log("TSC %"PRIx64" est. TSC %"PRIx64"\n", |
| 1220 | state->timestamp, state->est_timestamp); |
| 1221 | ptq->timestamp = state->est_timestamp; |
| 1222 | /* Use estimated TSC in unknown switch state */ |
| 1223 | } else if (pt->sync_switch && |
| 1224 | ptq->switch_state == INTEL_PT_SS_UNKNOWN && |
| 1225 | intel_pt_is_switch_ip(ptq, state->to_ip) && |
| 1226 | ptq->next_tid == -1) { |
| 1227 | intel_pt_log("TSC %"PRIx64" est. TSC %"PRIx64"\n", |
| 1228 | state->timestamp, state->est_timestamp); |
| 1229 | ptq->timestamp = state->est_timestamp; |
| 1230 | } else if (state->timestamp > ptq->timestamp) { |
| 1231 | ptq->timestamp = state->timestamp; |
| 1232 | } |
| 1233 | |
| 1234 | if (!pt->timeless_decoding && ptq->timestamp >= *timestamp) { |
| 1235 | *timestamp = ptq->timestamp; |
| 1236 | return 0; |
| 1237 | } |
| 1238 | } |
| 1239 | return 0; |
| 1240 | } |
| 1241 | |
| 1242 | static inline int intel_pt_update_queues(struct intel_pt *pt) |
| 1243 | { |
| 1244 | if (pt->queues.new_data) { |
| 1245 | pt->queues.new_data = false; |
| 1246 | return intel_pt_setup_queues(pt); |
| 1247 | } |
| 1248 | return 0; |
| 1249 | } |
| 1250 | |
| 1251 | static int intel_pt_process_queues(struct intel_pt *pt, u64 timestamp) |
| 1252 | { |
| 1253 | unsigned int queue_nr; |
| 1254 | u64 ts; |
| 1255 | int ret; |
| 1256 | |
| 1257 | while (1) { |
| 1258 | struct auxtrace_queue *queue; |
| 1259 | struct intel_pt_queue *ptq; |
| 1260 | |
| 1261 | if (!pt->heap.heap_cnt) |
| 1262 | return 0; |
| 1263 | |
| 1264 | if (pt->heap.heap_array[0].ordinal >= timestamp) |
| 1265 | return 0; |
| 1266 | |
| 1267 | queue_nr = pt->heap.heap_array[0].queue_nr; |
| 1268 | queue = &pt->queues.queue_array[queue_nr]; |
| 1269 | ptq = queue->priv; |
| 1270 | |
| 1271 | intel_pt_log("queue %u processing 0x%" PRIx64 " to 0x%" PRIx64 "\n", |
| 1272 | queue_nr, pt->heap.heap_array[0].ordinal, |
| 1273 | timestamp); |
| 1274 | |
| 1275 | auxtrace_heap__pop(&pt->heap); |
| 1276 | |
| 1277 | if (pt->heap.heap_cnt) { |
| 1278 | ts = pt->heap.heap_array[0].ordinal + 1; |
| 1279 | if (ts > timestamp) |
| 1280 | ts = timestamp; |
| 1281 | } else { |
| 1282 | ts = timestamp; |
| 1283 | } |
| 1284 | |
| 1285 | intel_pt_set_pid_tid_cpu(pt, queue); |
| 1286 | |
| 1287 | ret = intel_pt_run_decoder(ptq, &ts); |
| 1288 | |
| 1289 | if (ret < 0) { |
| 1290 | auxtrace_heap__add(&pt->heap, queue_nr, ts); |
| 1291 | return ret; |
| 1292 | } |
| 1293 | |
| 1294 | if (!ret) { |
| 1295 | ret = auxtrace_heap__add(&pt->heap, queue_nr, ts); |
| 1296 | if (ret < 0) |
| 1297 | return ret; |
| 1298 | } else { |
| 1299 | ptq->on_heap = false; |
| 1300 | } |
| 1301 | } |
| 1302 | |
| 1303 | return 0; |
| 1304 | } |
| 1305 | |
| 1306 | static int intel_pt_process_timeless_queues(struct intel_pt *pt, pid_t tid, |
| 1307 | u64 time_) |
| 1308 | { |
| 1309 | struct auxtrace_queues *queues = &pt->queues; |
| 1310 | unsigned int i; |
| 1311 | u64 ts = 0; |
| 1312 | |
| 1313 | for (i = 0; i < queues->nr_queues; i++) { |
| 1314 | struct auxtrace_queue *queue = &pt->queues.queue_array[i]; |
| 1315 | struct intel_pt_queue *ptq = queue->priv; |
| 1316 | |
| 1317 | if (ptq && (tid == -1 || ptq->tid == tid)) { |
| 1318 | ptq->time = time_; |
| 1319 | intel_pt_set_pid_tid_cpu(pt, queue); |
| 1320 | intel_pt_run_decoder(ptq, &ts); |
| 1321 | } |
| 1322 | } |
| 1323 | return 0; |
| 1324 | } |
| 1325 | |
| 1326 | static int intel_pt_lost(struct intel_pt *pt, struct perf_sample *sample) |
| 1327 | { |
| 1328 | return intel_pt_synth_error(pt, INTEL_PT_ERR_LOST, sample->cpu, |
| 1329 | sample->pid, sample->tid, 0); |
| 1330 | } |
| 1331 | |
| 1332 | static struct intel_pt_queue *intel_pt_cpu_to_ptq(struct intel_pt *pt, int cpu) |
| 1333 | { |
| 1334 | unsigned i, j; |
| 1335 | |
| 1336 | if (cpu < 0 || !pt->queues.nr_queues) |
| 1337 | return NULL; |
| 1338 | |
| 1339 | if ((unsigned)cpu >= pt->queues.nr_queues) |
| 1340 | i = pt->queues.nr_queues - 1; |
| 1341 | else |
| 1342 | i = cpu; |
| 1343 | |
| 1344 | if (pt->queues.queue_array[i].cpu == cpu) |
| 1345 | return pt->queues.queue_array[i].priv; |
| 1346 | |
| 1347 | for (j = 0; i > 0; j++) { |
| 1348 | if (pt->queues.queue_array[--i].cpu == cpu) |
| 1349 | return pt->queues.queue_array[i].priv; |
| 1350 | } |
| 1351 | |
| 1352 | for (; j < pt->queues.nr_queues; j++) { |
| 1353 | if (pt->queues.queue_array[j].cpu == cpu) |
| 1354 | return pt->queues.queue_array[j].priv; |
| 1355 | } |
| 1356 | |
| 1357 | return NULL; |
| 1358 | } |
| 1359 | |
| 1360 | static int intel_pt_process_switch(struct intel_pt *pt, |
| 1361 | struct perf_sample *sample) |
| 1362 | { |
| 1363 | struct intel_pt_queue *ptq; |
| 1364 | struct perf_evsel *evsel; |
| 1365 | pid_t tid; |
| 1366 | int cpu, err; |
| 1367 | |
| 1368 | evsel = perf_evlist__id2evsel(pt->session->evlist, sample->id); |
| 1369 | if (evsel != pt->switch_evsel) |
| 1370 | return 0; |
| 1371 | |
| 1372 | tid = perf_evsel__intval(evsel, sample, "next_pid"); |
| 1373 | cpu = sample->cpu; |
| 1374 | |
| 1375 | intel_pt_log("sched_switch: cpu %d tid %d time %"PRIu64" tsc %#"PRIx64"\n", |
| 1376 | cpu, tid, sample->time, perf_time_to_tsc(sample->time, |
| 1377 | &pt->tc)); |
| 1378 | |
| 1379 | if (!pt->sync_switch) |
| 1380 | goto out; |
| 1381 | |
| 1382 | ptq = intel_pt_cpu_to_ptq(pt, cpu); |
| 1383 | if (!ptq) |
| 1384 | goto out; |
| 1385 | |
| 1386 | switch (ptq->switch_state) { |
| 1387 | case INTEL_PT_SS_NOT_TRACING: |
| 1388 | ptq->next_tid = -1; |
| 1389 | break; |
| 1390 | case INTEL_PT_SS_UNKNOWN: |
| 1391 | case INTEL_PT_SS_TRACING: |
| 1392 | ptq->next_tid = tid; |
| 1393 | ptq->switch_state = INTEL_PT_SS_EXPECTING_SWITCH_IP; |
| 1394 | return 0; |
| 1395 | case INTEL_PT_SS_EXPECTING_SWITCH_EVENT: |
| 1396 | if (!ptq->on_heap) { |
| 1397 | ptq->timestamp = perf_time_to_tsc(sample->time, |
| 1398 | &pt->tc); |
| 1399 | err = auxtrace_heap__add(&pt->heap, ptq->queue_nr, |
| 1400 | ptq->timestamp); |
| 1401 | if (err) |
| 1402 | return err; |
| 1403 | ptq->on_heap = true; |
| 1404 | } |
| 1405 | ptq->switch_state = INTEL_PT_SS_TRACING; |
| 1406 | break; |
| 1407 | case INTEL_PT_SS_EXPECTING_SWITCH_IP: |
| 1408 | ptq->next_tid = tid; |
| 1409 | intel_pt_log("ERROR: cpu %d expecting switch ip\n", cpu); |
| 1410 | break; |
| 1411 | default: |
| 1412 | break; |
| 1413 | } |
| 1414 | out: |
| 1415 | return machine__set_current_tid(pt->machine, cpu, -1, tid); |
| 1416 | } |
| 1417 | |
| 1418 | static int intel_pt_process_itrace_start(struct intel_pt *pt, |
| 1419 | union perf_event *event, |
| 1420 | struct perf_sample *sample) |
| 1421 | { |
| 1422 | if (!pt->per_cpu_mmaps) |
| 1423 | return 0; |
| 1424 | |
| 1425 | intel_pt_log("itrace_start: cpu %d pid %d tid %d time %"PRIu64" tsc %#"PRIx64"\n", |
| 1426 | sample->cpu, event->itrace_start.pid, |
| 1427 | event->itrace_start.tid, sample->time, |
| 1428 | perf_time_to_tsc(sample->time, &pt->tc)); |
| 1429 | |
| 1430 | return machine__set_current_tid(pt->machine, sample->cpu, |
| 1431 | event->itrace_start.pid, |
| 1432 | event->itrace_start.tid); |
| 1433 | } |
| 1434 | |
| 1435 | static int intel_pt_process_event(struct perf_session *session, |
| 1436 | union perf_event *event, |
| 1437 | struct perf_sample *sample, |
| 1438 | struct perf_tool *tool) |
| 1439 | { |
| 1440 | struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt, |
| 1441 | auxtrace); |
| 1442 | u64 timestamp; |
| 1443 | int err = 0; |
| 1444 | |
| 1445 | if (dump_trace) |
| 1446 | return 0; |
| 1447 | |
| 1448 | if (!tool->ordered_events) { |
| 1449 | pr_err("Intel Processor Trace requires ordered events\n"); |
| 1450 | return -EINVAL; |
| 1451 | } |
| 1452 | |
Adrian Hunter | 81cd60c | 2015-08-20 11:51:32 +0300 | [diff] [blame] | 1453 | if (sample->time && sample->time != (u64)-1) |
Adrian Hunter | 90e457f | 2015-07-17 19:33:41 +0300 | [diff] [blame] | 1454 | timestamp = perf_time_to_tsc(sample->time, &pt->tc); |
| 1455 | else |
| 1456 | timestamp = 0; |
| 1457 | |
| 1458 | if (timestamp || pt->timeless_decoding) { |
| 1459 | err = intel_pt_update_queues(pt); |
| 1460 | if (err) |
| 1461 | return err; |
| 1462 | } |
| 1463 | |
| 1464 | if (pt->timeless_decoding) { |
| 1465 | if (event->header.type == PERF_RECORD_EXIT) { |
| 1466 | err = intel_pt_process_timeless_queues(pt, |
| 1467 | event->comm.tid, |
| 1468 | sample->time); |
| 1469 | } |
| 1470 | } else if (timestamp) { |
| 1471 | err = intel_pt_process_queues(pt, timestamp); |
| 1472 | } |
| 1473 | if (err) |
| 1474 | return err; |
| 1475 | |
| 1476 | if (event->header.type == PERF_RECORD_AUX && |
| 1477 | (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) && |
| 1478 | pt->synth_opts.errors) { |
| 1479 | err = intel_pt_lost(pt, sample); |
| 1480 | if (err) |
| 1481 | return err; |
| 1482 | } |
| 1483 | |
| 1484 | if (pt->switch_evsel && event->header.type == PERF_RECORD_SAMPLE) |
| 1485 | err = intel_pt_process_switch(pt, sample); |
| 1486 | else if (event->header.type == PERF_RECORD_ITRACE_START) |
| 1487 | err = intel_pt_process_itrace_start(pt, event, sample); |
| 1488 | |
| 1489 | intel_pt_log("event %s (%u): cpu %d time %"PRIu64" tsc %#"PRIx64"\n", |
| 1490 | perf_event__name(event->header.type), event->header.type, |
| 1491 | sample->cpu, sample->time, timestamp); |
| 1492 | |
| 1493 | return err; |
| 1494 | } |
| 1495 | |
| 1496 | static int intel_pt_flush(struct perf_session *session, struct perf_tool *tool) |
| 1497 | { |
| 1498 | struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt, |
| 1499 | auxtrace); |
| 1500 | int ret; |
| 1501 | |
| 1502 | if (dump_trace) |
| 1503 | return 0; |
| 1504 | |
| 1505 | if (!tool->ordered_events) |
| 1506 | return -EINVAL; |
| 1507 | |
| 1508 | ret = intel_pt_update_queues(pt); |
| 1509 | if (ret < 0) |
| 1510 | return ret; |
| 1511 | |
| 1512 | if (pt->timeless_decoding) |
| 1513 | return intel_pt_process_timeless_queues(pt, -1, |
| 1514 | MAX_TIMESTAMP - 1); |
| 1515 | |
| 1516 | return intel_pt_process_queues(pt, MAX_TIMESTAMP); |
| 1517 | } |
| 1518 | |
| 1519 | static void intel_pt_free_events(struct perf_session *session) |
| 1520 | { |
| 1521 | struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt, |
| 1522 | auxtrace); |
| 1523 | struct auxtrace_queues *queues = &pt->queues; |
| 1524 | unsigned int i; |
| 1525 | |
| 1526 | for (i = 0; i < queues->nr_queues; i++) { |
| 1527 | intel_pt_free_queue(queues->queue_array[i].priv); |
| 1528 | queues->queue_array[i].priv = NULL; |
| 1529 | } |
| 1530 | intel_pt_log_disable(); |
| 1531 | auxtrace_queues__free(queues); |
| 1532 | } |
| 1533 | |
| 1534 | static void intel_pt_free(struct perf_session *session) |
| 1535 | { |
| 1536 | struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt, |
| 1537 | auxtrace); |
| 1538 | |
| 1539 | auxtrace_heap__free(&pt->heap); |
| 1540 | intel_pt_free_events(session); |
| 1541 | session->auxtrace = NULL; |
| 1542 | thread__delete(pt->unknown_thread); |
| 1543 | free(pt); |
| 1544 | } |
| 1545 | |
| 1546 | static int intel_pt_process_auxtrace_event(struct perf_session *session, |
| 1547 | union perf_event *event, |
| 1548 | struct perf_tool *tool __maybe_unused) |
| 1549 | { |
| 1550 | struct intel_pt *pt = container_of(session->auxtrace, struct intel_pt, |
| 1551 | auxtrace); |
| 1552 | |
| 1553 | if (pt->sampling_mode) |
| 1554 | return 0; |
| 1555 | |
| 1556 | if (!pt->data_queued) { |
| 1557 | struct auxtrace_buffer *buffer; |
| 1558 | off_t data_offset; |
| 1559 | int fd = perf_data_file__fd(session->file); |
| 1560 | int err; |
| 1561 | |
| 1562 | if (perf_data_file__is_pipe(session->file)) { |
| 1563 | data_offset = 0; |
| 1564 | } else { |
| 1565 | data_offset = lseek(fd, 0, SEEK_CUR); |
| 1566 | if (data_offset == -1) |
| 1567 | return -errno; |
| 1568 | } |
| 1569 | |
| 1570 | err = auxtrace_queues__add_event(&pt->queues, session, event, |
| 1571 | data_offset, &buffer); |
| 1572 | if (err) |
| 1573 | return err; |
| 1574 | |
| 1575 | /* Dump here now we have copied a piped trace out of the pipe */ |
| 1576 | if (dump_trace) { |
| 1577 | if (auxtrace_buffer__get_data(buffer, fd)) { |
| 1578 | intel_pt_dump_event(pt, buffer->data, |
| 1579 | buffer->size); |
| 1580 | auxtrace_buffer__put_data(buffer); |
| 1581 | } |
| 1582 | } |
| 1583 | } |
| 1584 | |
| 1585 | return 0; |
| 1586 | } |
| 1587 | |
| 1588 | struct intel_pt_synth { |
| 1589 | struct perf_tool dummy_tool; |
| 1590 | struct perf_session *session; |
| 1591 | }; |
| 1592 | |
| 1593 | static int intel_pt_event_synth(struct perf_tool *tool, |
| 1594 | union perf_event *event, |
| 1595 | struct perf_sample *sample __maybe_unused, |
| 1596 | struct machine *machine __maybe_unused) |
| 1597 | { |
| 1598 | struct intel_pt_synth *intel_pt_synth = |
| 1599 | container_of(tool, struct intel_pt_synth, dummy_tool); |
| 1600 | |
| 1601 | return perf_session__deliver_synth_event(intel_pt_synth->session, event, |
| 1602 | NULL); |
| 1603 | } |
| 1604 | |
| 1605 | static int intel_pt_synth_event(struct perf_session *session, |
| 1606 | struct perf_event_attr *attr, u64 id) |
| 1607 | { |
| 1608 | struct intel_pt_synth intel_pt_synth; |
| 1609 | |
| 1610 | memset(&intel_pt_synth, 0, sizeof(struct intel_pt_synth)); |
| 1611 | intel_pt_synth.session = session; |
| 1612 | |
| 1613 | return perf_event__synthesize_attr(&intel_pt_synth.dummy_tool, attr, 1, |
| 1614 | &id, intel_pt_event_synth); |
| 1615 | } |
| 1616 | |
| 1617 | static int intel_pt_synth_events(struct intel_pt *pt, |
| 1618 | struct perf_session *session) |
| 1619 | { |
| 1620 | struct perf_evlist *evlist = session->evlist; |
| 1621 | struct perf_evsel *evsel; |
| 1622 | struct perf_event_attr attr; |
| 1623 | bool found = false; |
| 1624 | u64 id; |
| 1625 | int err; |
| 1626 | |
| 1627 | evlist__for_each(evlist, evsel) { |
| 1628 | if (evsel->attr.type == pt->pmu_type && evsel->ids) { |
| 1629 | found = true; |
| 1630 | break; |
| 1631 | } |
| 1632 | } |
| 1633 | |
| 1634 | if (!found) { |
| 1635 | pr_debug("There are no selected events with Intel Processor Trace data\n"); |
| 1636 | return 0; |
| 1637 | } |
| 1638 | |
| 1639 | memset(&attr, 0, sizeof(struct perf_event_attr)); |
| 1640 | attr.size = sizeof(struct perf_event_attr); |
| 1641 | attr.type = PERF_TYPE_HARDWARE; |
| 1642 | attr.sample_type = evsel->attr.sample_type & PERF_SAMPLE_MASK; |
| 1643 | attr.sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID | |
| 1644 | PERF_SAMPLE_PERIOD; |
| 1645 | if (pt->timeless_decoding) |
| 1646 | attr.sample_type &= ~(u64)PERF_SAMPLE_TIME; |
| 1647 | else |
| 1648 | attr.sample_type |= PERF_SAMPLE_TIME; |
| 1649 | if (!pt->per_cpu_mmaps) |
| 1650 | attr.sample_type &= ~(u64)PERF_SAMPLE_CPU; |
| 1651 | attr.exclude_user = evsel->attr.exclude_user; |
| 1652 | attr.exclude_kernel = evsel->attr.exclude_kernel; |
| 1653 | attr.exclude_hv = evsel->attr.exclude_hv; |
| 1654 | attr.exclude_host = evsel->attr.exclude_host; |
| 1655 | attr.exclude_guest = evsel->attr.exclude_guest; |
| 1656 | attr.sample_id_all = evsel->attr.sample_id_all; |
| 1657 | attr.read_format = evsel->attr.read_format; |
| 1658 | |
| 1659 | id = evsel->id[0] + 1000000000; |
| 1660 | if (!id) |
| 1661 | id = 1; |
| 1662 | |
| 1663 | if (pt->synth_opts.instructions) { |
| 1664 | attr.config = PERF_COUNT_HW_INSTRUCTIONS; |
| 1665 | if (pt->synth_opts.period_type == PERF_ITRACE_PERIOD_NANOSECS) |
| 1666 | attr.sample_period = |
| 1667 | intel_pt_ns_to_ticks(pt, pt->synth_opts.period); |
| 1668 | else |
| 1669 | attr.sample_period = pt->synth_opts.period; |
| 1670 | pt->instructions_sample_period = attr.sample_period; |
| 1671 | if (pt->synth_opts.callchain) |
| 1672 | attr.sample_type |= PERF_SAMPLE_CALLCHAIN; |
| 1673 | pr_debug("Synthesizing 'instructions' event with id %" PRIu64 " sample type %#" PRIx64 "\n", |
| 1674 | id, (u64)attr.sample_type); |
| 1675 | err = intel_pt_synth_event(session, &attr, id); |
| 1676 | if (err) { |
| 1677 | pr_err("%s: failed to synthesize 'instructions' event type\n", |
| 1678 | __func__); |
| 1679 | return err; |
| 1680 | } |
| 1681 | pt->sample_instructions = true; |
| 1682 | pt->instructions_sample_type = attr.sample_type; |
| 1683 | pt->instructions_id = id; |
| 1684 | id += 1; |
| 1685 | } |
| 1686 | |
| 1687 | if (pt->synth_opts.transactions) { |
| 1688 | attr.config = PERF_COUNT_HW_INSTRUCTIONS; |
| 1689 | attr.sample_period = 1; |
| 1690 | if (pt->synth_opts.callchain) |
| 1691 | attr.sample_type |= PERF_SAMPLE_CALLCHAIN; |
| 1692 | pr_debug("Synthesizing 'transactions' event with id %" PRIu64 " sample type %#" PRIx64 "\n", |
| 1693 | id, (u64)attr.sample_type); |
| 1694 | err = intel_pt_synth_event(session, &attr, id); |
| 1695 | if (err) { |
| 1696 | pr_err("%s: failed to synthesize 'transactions' event type\n", |
| 1697 | __func__); |
| 1698 | return err; |
| 1699 | } |
| 1700 | pt->sample_transactions = true; |
| 1701 | pt->transactions_id = id; |
| 1702 | id += 1; |
| 1703 | evlist__for_each(evlist, evsel) { |
| 1704 | if (evsel->id && evsel->id[0] == pt->transactions_id) { |
| 1705 | if (evsel->name) |
| 1706 | zfree(&evsel->name); |
| 1707 | evsel->name = strdup("transactions"); |
| 1708 | break; |
| 1709 | } |
| 1710 | } |
| 1711 | } |
| 1712 | |
| 1713 | if (pt->synth_opts.branches) { |
| 1714 | attr.config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS; |
| 1715 | attr.sample_period = 1; |
| 1716 | attr.sample_type |= PERF_SAMPLE_ADDR; |
| 1717 | attr.sample_type &= ~(u64)PERF_SAMPLE_CALLCHAIN; |
| 1718 | pr_debug("Synthesizing 'branches' event with id %" PRIu64 " sample type %#" PRIx64 "\n", |
| 1719 | id, (u64)attr.sample_type); |
| 1720 | err = intel_pt_synth_event(session, &attr, id); |
| 1721 | if (err) { |
| 1722 | pr_err("%s: failed to synthesize 'branches' event type\n", |
| 1723 | __func__); |
| 1724 | return err; |
| 1725 | } |
| 1726 | pt->sample_branches = true; |
| 1727 | pt->branches_sample_type = attr.sample_type; |
| 1728 | pt->branches_id = id; |
| 1729 | } |
| 1730 | |
| 1731 | pt->synth_needs_swap = evsel->needs_swap; |
| 1732 | |
| 1733 | return 0; |
| 1734 | } |
| 1735 | |
| 1736 | static struct perf_evsel *intel_pt_find_sched_switch(struct perf_evlist *evlist) |
| 1737 | { |
| 1738 | struct perf_evsel *evsel; |
| 1739 | |
| 1740 | evlist__for_each_reverse(evlist, evsel) { |
| 1741 | const char *name = perf_evsel__name(evsel); |
| 1742 | |
| 1743 | if (!strcmp(name, "sched:sched_switch")) |
| 1744 | return evsel; |
| 1745 | } |
| 1746 | |
| 1747 | return NULL; |
| 1748 | } |
| 1749 | |
| 1750 | static const char * const intel_pt_info_fmts[] = { |
| 1751 | [INTEL_PT_PMU_TYPE] = " PMU Type %"PRId64"\n", |
| 1752 | [INTEL_PT_TIME_SHIFT] = " Time Shift %"PRIu64"\n", |
| 1753 | [INTEL_PT_TIME_MULT] = " Time Muliplier %"PRIu64"\n", |
| 1754 | [INTEL_PT_TIME_ZERO] = " Time Zero %"PRIu64"\n", |
| 1755 | [INTEL_PT_CAP_USER_TIME_ZERO] = " Cap Time Zero %"PRId64"\n", |
| 1756 | [INTEL_PT_TSC_BIT] = " TSC bit %#"PRIx64"\n", |
| 1757 | [INTEL_PT_NORETCOMP_BIT] = " NoRETComp bit %#"PRIx64"\n", |
| 1758 | [INTEL_PT_HAVE_SCHED_SWITCH] = " Have sched_switch %"PRId64"\n", |
| 1759 | [INTEL_PT_SNAPSHOT_MODE] = " Snapshot mode %"PRId64"\n", |
| 1760 | [INTEL_PT_PER_CPU_MMAPS] = " Per-cpu maps %"PRId64"\n", |
| 1761 | }; |
| 1762 | |
| 1763 | static void intel_pt_print_info(u64 *arr, int start, int finish) |
| 1764 | { |
| 1765 | int i; |
| 1766 | |
| 1767 | if (!dump_trace) |
| 1768 | return; |
| 1769 | |
| 1770 | for (i = start; i <= finish; i++) |
| 1771 | fprintf(stdout, intel_pt_info_fmts[i], arr[i]); |
| 1772 | } |
| 1773 | |
| 1774 | int intel_pt_process_auxtrace_info(union perf_event *event, |
| 1775 | struct perf_session *session) |
| 1776 | { |
| 1777 | struct auxtrace_info_event *auxtrace_info = &event->auxtrace_info; |
| 1778 | size_t min_sz = sizeof(u64) * INTEL_PT_PER_CPU_MMAPS; |
| 1779 | struct intel_pt *pt; |
| 1780 | int err; |
| 1781 | |
| 1782 | if (auxtrace_info->header.size < sizeof(struct auxtrace_info_event) + |
| 1783 | min_sz) |
| 1784 | return -EINVAL; |
| 1785 | |
| 1786 | pt = zalloc(sizeof(struct intel_pt)); |
| 1787 | if (!pt) |
| 1788 | return -ENOMEM; |
| 1789 | |
| 1790 | err = auxtrace_queues__init(&pt->queues); |
| 1791 | if (err) |
| 1792 | goto err_free; |
| 1793 | |
| 1794 | intel_pt_log_set_name(INTEL_PT_PMU_NAME); |
| 1795 | |
| 1796 | pt->session = session; |
| 1797 | pt->machine = &session->machines.host; /* No kvm support */ |
| 1798 | pt->auxtrace_type = auxtrace_info->type; |
| 1799 | pt->pmu_type = auxtrace_info->priv[INTEL_PT_PMU_TYPE]; |
| 1800 | pt->tc.time_shift = auxtrace_info->priv[INTEL_PT_TIME_SHIFT]; |
| 1801 | pt->tc.time_mult = auxtrace_info->priv[INTEL_PT_TIME_MULT]; |
| 1802 | pt->tc.time_zero = auxtrace_info->priv[INTEL_PT_TIME_ZERO]; |
| 1803 | pt->cap_user_time_zero = auxtrace_info->priv[INTEL_PT_CAP_USER_TIME_ZERO]; |
| 1804 | pt->tsc_bit = auxtrace_info->priv[INTEL_PT_TSC_BIT]; |
| 1805 | pt->noretcomp_bit = auxtrace_info->priv[INTEL_PT_NORETCOMP_BIT]; |
| 1806 | pt->have_sched_switch = auxtrace_info->priv[INTEL_PT_HAVE_SCHED_SWITCH]; |
| 1807 | pt->snapshot_mode = auxtrace_info->priv[INTEL_PT_SNAPSHOT_MODE]; |
| 1808 | pt->per_cpu_mmaps = auxtrace_info->priv[INTEL_PT_PER_CPU_MMAPS]; |
| 1809 | intel_pt_print_info(&auxtrace_info->priv[0], INTEL_PT_PMU_TYPE, |
| 1810 | INTEL_PT_PER_CPU_MMAPS); |
| 1811 | |
| 1812 | pt->timeless_decoding = intel_pt_timeless_decoding(pt); |
| 1813 | pt->have_tsc = intel_pt_have_tsc(pt); |
| 1814 | pt->sampling_mode = false; |
| 1815 | pt->est_tsc = !pt->timeless_decoding; |
| 1816 | |
| 1817 | pt->unknown_thread = thread__new(999999999, 999999999); |
| 1818 | if (!pt->unknown_thread) { |
| 1819 | err = -ENOMEM; |
| 1820 | goto err_free_queues; |
| 1821 | } |
| 1822 | err = thread__set_comm(pt->unknown_thread, "unknown", 0); |
| 1823 | if (err) |
| 1824 | goto err_delete_thread; |
| 1825 | if (thread__init_map_groups(pt->unknown_thread, pt->machine)) { |
| 1826 | err = -ENOMEM; |
| 1827 | goto err_delete_thread; |
| 1828 | } |
| 1829 | |
| 1830 | pt->auxtrace.process_event = intel_pt_process_event; |
| 1831 | pt->auxtrace.process_auxtrace_event = intel_pt_process_auxtrace_event; |
| 1832 | pt->auxtrace.flush_events = intel_pt_flush; |
| 1833 | pt->auxtrace.free_events = intel_pt_free_events; |
| 1834 | pt->auxtrace.free = intel_pt_free; |
| 1835 | session->auxtrace = &pt->auxtrace; |
| 1836 | |
| 1837 | if (dump_trace) |
| 1838 | return 0; |
| 1839 | |
| 1840 | if (pt->have_sched_switch == 1) { |
| 1841 | pt->switch_evsel = intel_pt_find_sched_switch(session->evlist); |
| 1842 | if (!pt->switch_evsel) { |
| 1843 | pr_err("%s: missing sched_switch event\n", __func__); |
| 1844 | goto err_delete_thread; |
| 1845 | } |
| 1846 | } |
| 1847 | |
| 1848 | if (session->itrace_synth_opts && session->itrace_synth_opts->set) { |
| 1849 | pt->synth_opts = *session->itrace_synth_opts; |
| 1850 | } else { |
| 1851 | itrace_synth_opts__set_default(&pt->synth_opts); |
| 1852 | if (use_browser != -1) { |
| 1853 | pt->synth_opts.branches = false; |
| 1854 | pt->synth_opts.callchain = true; |
| 1855 | } |
| 1856 | } |
| 1857 | |
| 1858 | if (pt->synth_opts.log) |
| 1859 | intel_pt_log_enable(); |
| 1860 | |
| 1861 | /* Maximum non-turbo ratio is TSC freq / 100 MHz */ |
| 1862 | if (pt->tc.time_mult) { |
| 1863 | u64 tsc_freq = intel_pt_ns_to_ticks(pt, 1000000000); |
| 1864 | |
| 1865 | pt->max_non_turbo_ratio = (tsc_freq + 50000000) / 100000000; |
| 1866 | intel_pt_log("TSC frequency %"PRIu64"\n", tsc_freq); |
| 1867 | intel_pt_log("Maximum non-turbo ratio %u\n", |
| 1868 | pt->max_non_turbo_ratio); |
| 1869 | } |
| 1870 | |
| 1871 | if (pt->synth_opts.calls) |
| 1872 | pt->branches_filter |= PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC | |
| 1873 | PERF_IP_FLAG_TRACE_END; |
| 1874 | if (pt->synth_opts.returns) |
| 1875 | pt->branches_filter |= PERF_IP_FLAG_RETURN | |
| 1876 | PERF_IP_FLAG_TRACE_BEGIN; |
| 1877 | |
| 1878 | if (pt->synth_opts.callchain && !symbol_conf.use_callchain) { |
| 1879 | symbol_conf.use_callchain = true; |
| 1880 | if (callchain_register_param(&callchain_param) < 0) { |
| 1881 | symbol_conf.use_callchain = false; |
| 1882 | pt->synth_opts.callchain = false; |
| 1883 | } |
| 1884 | } |
| 1885 | |
| 1886 | err = intel_pt_synth_events(pt, session); |
| 1887 | if (err) |
| 1888 | goto err_delete_thread; |
| 1889 | |
| 1890 | err = auxtrace_queues__process_index(&pt->queues, session); |
| 1891 | if (err) |
| 1892 | goto err_delete_thread; |
| 1893 | |
| 1894 | if (pt->queues.populated) |
| 1895 | pt->data_queued = true; |
| 1896 | |
| 1897 | if (pt->timeless_decoding) |
| 1898 | pr_debug2("Intel PT decoding without timestamps\n"); |
| 1899 | |
| 1900 | return 0; |
| 1901 | |
| 1902 | err_delete_thread: |
| 1903 | thread__delete(pt->unknown_thread); |
| 1904 | err_free_queues: |
| 1905 | intel_pt_log_disable(); |
| 1906 | auxtrace_queues__free(&pt->queues); |
| 1907 | session->auxtrace = NULL; |
| 1908 | err_free: |
| 1909 | free(pt); |
| 1910 | return err; |
| 1911 | } |