tools/perf/util/event.c

   1 #include <errno.h>
   2 #include <fcntl.h>
   3 #include <inttypes.h>
   4 #include <linux/kernel.h>
   5 #include <linux/types.h>
   6 #include <perf/cpumap.h>
   7 #include <sys/types.h>
   8 #include <sys/stat.h>
   9 #include <unistd.h>
  10 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
  11 #include <linux/perf_event.h>
  12 #include <linux/zalloc.h>
  13 #include "cpumap.h"
  14 #include "dso.h"
  15 #include "event.h"
  16 #include "debug.h"
  17 #include "hist.h"
  18 #include "machine.h"
  19 #include "sort.h"
  20 #include "string2.h"
  21 #include "strlist.h"
  22 #include "thread.h"
  23 #include "thread_map.h"
  24 #include "time-utils.h"
  25 #include <linux/ctype.h>
  26 #include "map.h"
  27 #include "util/namespaces.h"
  28 #include "symbol.h"
  29 #include "symbol/kallsyms.h"
  30 #include "asm/bug.h"
  31 #include "stat.h"
  32 #include "session.h"
  33 #include "bpf-event.h"
  34 #include "print_binary.h"
  35 #include "tool.h"
  36 #include "../perf.h"
  37
  38 static const char *perf_event__names[] = {
  39         [0]                                     = "TOTAL",
  40         [PERF_RECORD_MMAP]                      = "MMAP",
  41         [PERF_RECORD_MMAP2]                     = "MMAP2",
  42         [PERF_RECORD_LOST]                      = "LOST",
  43         [PERF_RECORD_COMM]                      = "COMM",
  44         [PERF_RECORD_EXIT]                      = "EXIT",
  45         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  46         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  47         [PERF_RECORD_FORK]                      = "FORK",
  48         [PERF_RECORD_READ]                      = "READ",
  49         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  50         [PERF_RECORD_AUX]                       = "AUX",
  51         [PERF_RECORD_ITRACE_START]              = "ITRACE_START",
  52         [PERF_RECORD_LOST_SAMPLES]              = "LOST_SAMPLES",
  53         [PERF_RECORD_SWITCH]                    = "SWITCH",
  54         [PERF_RECORD_SWITCH_CPU_WIDE]           = "SWITCH_CPU_WIDE",
  55         [PERF_RECORD_NAMESPACES]                = "NAMESPACES",
  56         [PERF_RECORD_KSYMBOL]                   = "KSYMBOL",
  57         [PERF_RECORD_BPF_EVENT]                 = "BPF_EVENT",
  58         [PERF_RECORD_CGROUP]                    = "CGROUP",
  59         [PERF_RECORD_TEXT_POKE]                 = "TEXT_POKE",
  60         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  61         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  62         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  63         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  64         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  65         [PERF_RECORD_ID_INDEX]                  = "ID_INDEX",
  66         [PERF_RECORD_AUXTRACE_INFO]             = "AUXTRACE_INFO",
  67         [PERF_RECORD_AUXTRACE]                  = "AUXTRACE",
  68         [PERF_RECORD_AUXTRACE_ERROR]            = "AUXTRACE_ERROR",
  69         [PERF_RECORD_THREAD_MAP]                = "THREAD_MAP",
  70         [PERF_RECORD_CPU_MAP]                   = "CPU_MAP",
  71         [PERF_RECORD_STAT_CONFIG]               = "STAT_CONFIG",
  72         [PERF_RECORD_STAT]                      = "STAT",
  73         [PERF_RECORD_STAT_ROUND]                = "STAT_ROUND",
  74         [PERF_RECORD_EVENT_UPDATE]              = "EVENT_UPDATE",
  75         [PERF_RECORD_TIME_CONV]                 = "TIME_CONV",
  76         [PERF_RECORD_HEADER_FEATURE]            = "FEATURE",
  77         [PERF_RECORD_COMPRESSED]                = "COMPRESSED",
  78 };
  79
  80 const char *perf_event__name(unsigned int id)
  81 {
  82         if (id >= ARRAY_SIZE(perf_event__names))
  83                 return "INVALID";
  84         if (!perf_event__names[id])
  85                 return "UNKNOWN";
  86         return perf_event__names[id];
  87 }
  88
  89 struct process_symbol_args {
  90         const char *name;
  91         u64        start;
  92 };
  93
  94 static int find_symbol_cb(void *arg, const char *name, char type,
  95                           u64 start)
  96 {
  97         struct process_symbol_args *args = arg;
  98
  99         /*
 100          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 101          * an 'A' to the same address as "_stext".
 102          */
 103         if (!(kallsyms__is_function(type) ||
 104               type == 'A') || strcmp(name, args->name))
 105                 return 0;
 106
 107         args->start = start;
 108         return 1;
 109 }
 110
 111 int kallsyms__get_function_start(const char *kallsyms_filename,
 112                                  const char *symbol_name, u64 *addr)
 113 {
 114         struct process_symbol_args args = { .name = symbol_name, };
 115
 116         if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
 117                 return -1;
 118
 119         *addr = args.start;
 120         return 0;
 121 }
 122
 123 void perf_event__read_stat_config(struct perf_stat_config *config,
 124                                   struct perf_record_stat_config *event)
 125 {
 126         unsigned i;
 127
 128         for (i = 0; i < event->nr; i++) {
 129
 130                 switch (event->data[i].tag) {
 131 #define CASE(__term, __val)                                     \
 132                 case PERF_STAT_CONFIG_TERM__##__term:           \
 133                         config->__val = event->data[i].val;     \
 134                         break;
 135
 136                 CASE(AGGR_MODE, aggr_mode)
 137                 CASE(SCALE,     scale)
 138                 CASE(INTERVAL,  interval)
 139 #undef CASE
 140                 default:
 141                         pr_warning("unknown stat config term %" PRI_lu64 "\n",
 142                                    event->data[i].tag);
 143                 }
 144         }
 145 }
 146
 147 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
 148 {
 149         const char *s;
 150
 151         if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
 152                 s = " exec";
 153         else
 154                 s = "";
 155
 156         return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
 157 }
 158
 159 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
 160 {
 161         size_t ret = 0;
 162         struct perf_ns_link_info *ns_link_info;
 163         u32 nr_namespaces, idx;
 164
 165         ns_link_info = event->namespaces.link_info;
 166         nr_namespaces = event->namespaces.nr_namespaces;
 167
 168         ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
 169                        event->namespaces.pid,
 170                        event->namespaces.tid,
 171                        nr_namespaces);
 172
 173         for (idx = 0; idx < nr_namespaces; idx++) {
 174                 if (idx && (idx % 4 == 0))
 175                         ret += fprintf(fp, "\n\t\t ");
 176
 177                 ret  += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
 178                                 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
 179                                 (u64)ns_link_info[idx].ino,
 180                                 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
 181         }
 182
 183         return ret;
 184 }
 185
 186 size_t perf_event__fprintf_cgroup(union perf_event *event, FILE *fp)
 187 {
 188         return fprintf(fp, " cgroup: %" PRI_lu64 " %s\n",
 189                        event->cgroup.id, event->cgroup.path);
 190 }
 191
 192 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
 193                              union perf_event *event,
 194                              struct perf_sample *sample,
 195                              struct machine *machine)
 196 {
 197         return machine__process_comm_event(machine, event, sample);
 198 }
 199
 200 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
 201                                    union perf_event *event,
 202                                    struct perf_sample *sample,
 203                                    struct machine *machine)
 204 {
 205         return machine__process_namespaces_event(machine, event, sample);
 206 }
 207
 208 int perf_event__process_cgroup(struct perf_tool *tool __maybe_unused,
 209                                union perf_event *event,
 210                                struct perf_sample *sample,
 211                                struct machine *machine)
 212 {
 213         return machine__process_cgroup_event(machine, event, sample);
 214 }
 215
 216 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
 217                              union perf_event *event,
 218                              struct perf_sample *sample,
 219                              struct machine *machine)
 220 {
 221         return machine__process_lost_event(machine, event, sample);
 222 }
 223
 224 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
 225                             union perf_event *event,
 226                             struct perf_sample *sample __maybe_unused,
 227                             struct machine *machine)
 228 {
 229         return machine__process_aux_event(machine, event);
 230 }
 231
 232 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
 233                                      union perf_event *event,
 234                                      struct perf_sample *sample __maybe_unused,
 235                                      struct machine *machine)
 236 {
 237         return machine__process_itrace_start_event(machine, event);
 238 }
 239
 240 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
 241                                      union perf_event *event,
 242                                      struct perf_sample *sample,
 243                                      struct machine *machine)
 244 {
 245         return machine__process_lost_samples_event(machine, event, sample);
 246 }
 247
 248 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
 249                                union perf_event *event,
 250                                struct perf_sample *sample __maybe_unused,
 251                                struct machine *machine)
 252 {
 253         return machine__process_switch_event(machine, event);
 254 }
 255
 256 int perf_event__process_ksymbol(struct perf_tool *tool __maybe_unused,
 257                                 union perf_event *event,
 258                                 struct perf_sample *sample __maybe_unused,
 259                                 struct machine *machine)
 260 {
 261         return machine__process_ksymbol(machine, event, sample);
 262 }
 263
 264 int perf_event__process_bpf(struct perf_tool *tool __maybe_unused,
 265                             union perf_event *event,
 266                             struct perf_sample *sample,
 267                             struct machine *machine)
 268 {
 269         return machine__process_bpf(machine, event, sample);
 270 }
 271
 272 int perf_event__process_text_poke(struct perf_tool *tool __maybe_unused,
 273                                   union perf_event *event,
 274                                   struct perf_sample *sample,
 275                                   struct machine *machine)
 276 {
 277         return machine__process_text_poke(machine, event, sample);
 278 }
 279
 280 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
 281 {
 282         return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64 "]: %c %s\n",
 283                        event->mmap.pid, event->mmap.tid, event->mmap.start,
 284                        event->mmap.len, event->mmap.pgoff,
 285                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
 286                        event->mmap.filename);
 287 }
 288
 289 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
 290 {
 291         return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64
 292                            " %02x:%02x %"PRI_lu64" %"PRI_lu64"]: %c%c%c%c %s\n",
 293                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
 294                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
 295                        event->mmap2.min, event->mmap2.ino,
 296                        event->mmap2.ino_generation,
 297                        (event->mmap2.prot & PROT_READ) ? 'r' : '-',
 298                        (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
 299                        (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
 300                        (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
 301                        event->mmap2.filename);
 302 }
 303
 304 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
 305 {
 306         struct perf_thread_map *threads = thread_map__new_event(&event->thread_map);
 307         size_t ret;
 308
 309         ret = fprintf(fp, " nr: ");
 310
 311         if (threads)
 312                 ret += thread_map__fprintf(threads, fp);
 313         else
 314                 ret += fprintf(fp, "failed to get threads from event\n");
 315
 316         perf_thread_map__put(threads);
 317         return ret;
 318 }
 319
 320 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
 321 {
 322         struct perf_cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
 323         size_t ret;
 324
 325         ret = fprintf(fp, ": ");
 326
 327         if (cpus)
 328                 ret += cpu_map__fprintf(cpus, fp);
 329         else
 330                 ret += fprintf(fp, "failed to get cpumap from event\n");
 331
 332         perf_cpu_map__put(cpus);
 333         return ret;
 334 }
 335
 336 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
 337                              union perf_event *event,
 338                              struct perf_sample *sample,
 339                              struct machine *machine)
 340 {
 341         return machine__process_mmap_event(machine, event, sample);
 342 }
 343
 344 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
 345                              union perf_event *event,
 346                              struct perf_sample *sample,
 347                              struct machine *machine)
 348 {
 349         return machine__process_mmap2_event(machine, event, sample);
 350 }
 351
 352 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
 353 {
 354         return fprintf(fp, "(%d:%d):(%d:%d)\n",
 355                        event->fork.pid, event->fork.tid,
 356                        event->fork.ppid, event->fork.ptid);
 357 }
 358
 359 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
 360                              union perf_event *event,
 361                              struct perf_sample *sample,
 362                              struct machine *machine)
 363 {
 364         return machine__process_fork_event(machine, event, sample);
 365 }
 366
 367 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
 368                              union perf_event *event,
 369                              struct perf_sample *sample,
 370                              struct machine *machine)
 371 {
 372         return machine__process_exit_event(machine, event, sample);
 373 }
 374
 375 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
 376 {
 377         return fprintf(fp, " offset: %#"PRI_lx64" size: %#"PRI_lx64" flags: %#"PRI_lx64" [%s%s%s]\n",
 378                        event->aux.aux_offset, event->aux.aux_size,
 379                        event->aux.flags,
 380                        event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
 381                        event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
 382                        event->aux.flags & PERF_AUX_FLAG_PARTIAL   ? "P" : "");
 383 }
 384
 385 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
 386 {
 387         return fprintf(fp, " pid: %u tid: %u\n",
 388                        event->itrace_start.pid, event->itrace_start.tid);
 389 }
 390
 391 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
 392 {
 393         bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
 394         const char *in_out = !out ? "IN         " :
 395                 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
 396                                     "OUT        " : "OUT preempt";
 397
 398         if (event->header.type == PERF_RECORD_SWITCH)
 399                 return fprintf(fp, " %s\n", in_out);
 400
 401         return fprintf(fp, " %s  %s pid/tid: %5d/%-5d\n",
 402                        in_out, out ? "next" : "prev",
 403                        event->context_switch.next_prev_pid,
 404                        event->context_switch.next_prev_tid);
 405 }
 406
 407 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
 408 {
 409         return fprintf(fp, " lost %" PRI_lu64 "\n", event->lost.lost);
 410 }
 411
 412 size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp)
 413 {
 414         return fprintf(fp, " addr %" PRI_lx64 " len %u type %u flags 0x%x name %s\n",
 415                        event->ksymbol.addr, event->ksymbol.len,
 416                        event->ksymbol.ksym_type,
 417                        event->ksymbol.flags, event->ksymbol.name);
 418 }
 419
 420 size_t perf_event__fprintf_bpf(union perf_event *event, FILE *fp)
 421 {
 422         return fprintf(fp, " type %u, flags %u, id %u\n",
 423                        event->bpf.type, event->bpf.flags, event->bpf.id);
 424 }
 425
 426 static int text_poke_printer(enum binary_printer_ops op, unsigned int val,
 427                              void *extra, FILE *fp)
 428 {
 429         bool old = *(bool *)extra;
 430
 431         switch ((int)op) {
 432         case BINARY_PRINT_LINE_BEGIN:
 433                 return fprintf(fp, "            %s bytes:", old ? "Old" : "New");
 434         case BINARY_PRINT_NUM_DATA:
 435                 return fprintf(fp, " %02x", val);
 436         case BINARY_PRINT_LINE_END:
 437                 return fprintf(fp, "\n");
 438         default:
 439                 return 0;
 440         }
 441 }
 442
 443 size_t perf_event__fprintf_text_poke(union perf_event *event, struct machine *machine, FILE *fp)
 444 {
 445         struct perf_record_text_poke_event *tp = &event->text_poke;
 446         size_t ret;
 447         bool old;
 448
 449         ret = fprintf(fp, " %" PRI_lx64 " ", tp->addr);
 450         if (machine) {
 451                 struct addr_location al;
 452
 453                 al.map = maps__find(&machine->kmaps, tp->addr);
 454                 if (al.map && map__load(al.map) >= 0) {
 455                         al.addr = al.map->map_ip(al.map, tp->addr);
 456                         al.sym = map__find_symbol(al.map, al.addr);
 457                         if (al.sym)
 458                                 ret += symbol__fprintf_symname_offs(al.sym, &al, fp);
 459                 }
 460         }
 461         ret += fprintf(fp, " old len %u new len %u\n", tp->old_len, tp->new_len);
 462         old = true;
 463         ret += binary__fprintf(tp->bytes, tp->old_len, 16, text_poke_printer,
 464                                &old, fp);
 465         old = false;
 466         ret += binary__fprintf(tp->bytes + tp->old_len, tp->new_len, 16,
 467                                text_poke_printer, &old, fp);
 468         return ret;
 469 }
 470
 471 size_t perf_event__fprintf(union perf_event *event, struct machine *machine, FILE *fp)
 472 {
 473         size_t ret = fprintf(fp, "PERF_RECORD_%s",
 474                              perf_event__name(event->header.type));
 475
 476         switch (event->header.type) {
 477         case PERF_RECORD_COMM:
 478                 ret += perf_event__fprintf_comm(event, fp);
 479                 break;
 480         case PERF_RECORD_FORK:
 481         case PERF_RECORD_EXIT:
 482                 ret += perf_event__fprintf_task(event, fp);
 483                 break;
 484         case PERF_RECORD_MMAP:
 485                 ret += perf_event__fprintf_mmap(event, fp);
 486                 break;
 487         case PERF_RECORD_NAMESPACES:
 488                 ret += perf_event__fprintf_namespaces(event, fp);
 489                 break;
 490         case PERF_RECORD_CGROUP:
 491                 ret += perf_event__fprintf_cgroup(event, fp);
 492                 break;
 493         case PERF_RECORD_MMAP2:
 494                 ret += perf_event__fprintf_mmap2(event, fp);
 495                 break;
 496         case PERF_RECORD_AUX:
 497                 ret += perf_event__fprintf_aux(event, fp);
 498                 break;
 499         case PERF_RECORD_ITRACE_START:
 500                 ret += perf_event__fprintf_itrace_start(event, fp);
 501                 break;
 502         case PERF_RECORD_SWITCH:
 503         case PERF_RECORD_SWITCH_CPU_WIDE:
 504                 ret += perf_event__fprintf_switch(event, fp);
 505                 break;
 506         case PERF_RECORD_LOST:
 507                 ret += perf_event__fprintf_lost(event, fp);
 508                 break;
 509         case PERF_RECORD_KSYMBOL:
 510                 ret += perf_event__fprintf_ksymbol(event, fp);
 511                 break;
 512         case PERF_RECORD_BPF_EVENT:
 513                 ret += perf_event__fprintf_bpf(event, fp);
 514                 break;
 515         case PERF_RECORD_TEXT_POKE:
 516                 ret += perf_event__fprintf_text_poke(event, machine, fp);
 517                 break;
 518         default:
 519                 ret += fprintf(fp, "\n");
 520         }
 521
 522         return ret;
 523 }
 524
 525 int perf_event__process(struct perf_tool *tool __maybe_unused,
 526                         union perf_event *event,
 527                         struct perf_sample *sample,
 528                         struct machine *machine)
 529 {
 530         return machine__process_event(machine, event, sample);
 531 }
 532
 533 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
 534                              struct addr_location *al)
 535 {
 536         struct maps *maps = thread->maps;
 537         struct machine *machine = maps->machine;
 538         bool load_map = false;
 539
 540         al->maps = maps;
 541         al->thread = thread;
 542         al->addr = addr;
 543         al->cpumode = cpumode;
 544         al->filtered = 0;
 545
 546         if (machine == NULL) {
 547                 al->map = NULL;
 548                 return NULL;
 549         }
 550
 551         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
 552                 al->level = 'k';
 553                 al->maps = maps = &machine->kmaps;
 554                 load_map = true;
 555         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
 556                 al->level = '.';
 557         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
 558                 al->level = 'g';
 559                 al->maps = maps = &machine->kmaps;
 560                 load_map = true;
 561         } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
 562                 al->level = 'u';
 563         } else {
 564                 al->level = 'H';
 565                 al->map = NULL;
 566
 567                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
 568                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
 569                         !perf_guest)
 570                         al->filtered |= (1 << HIST_FILTER__GUEST);
 571                 if ((cpumode == PERF_RECORD_MISC_USER ||
 572                         cpumode == PERF_RECORD_MISC_KERNEL) &&
 573                         !perf_host)
 574                         al->filtered |= (1 << HIST_FILTER__HOST);
 575
 576                 return NULL;
 577         }
 578
 579         al->map = maps__find(maps, al->addr);
 580         if (al->map != NULL) {
 581                 /*
 582                  * Kernel maps might be changed when loading symbols so loading
 583                  * must be done prior to using kernel maps.
 584                  */
 585                 if (load_map)
 586                         map__load(al->map);
 587                 al->addr = al->map->map_ip(al->map, al->addr);
 588         }
 589
 590         return al->map;
 591 }
 592
 593 /*
 594  * For branch stacks or branch samples, the sample cpumode might not be correct
 595  * because it applies only to the sample 'ip' and not necessary to 'addr' or
 596  * branch stack addresses. If possible, use a fallback to deal with those cases.
 597  */
 598 struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
 599                                 struct addr_location *al)
 600 {
 601         struct map *map = thread__find_map(thread, cpumode, addr, al);
 602         struct machine *machine = thread->maps->machine;
 603         u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
 604
 605         if (map || addr_cpumode == cpumode)
 606                 return map;
 607
 608         return thread__find_map(thread, addr_cpumode, addr, al);
 609 }
 610
 611 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
 612                                    u64 addr, struct addr_location *al)
 613 {
 614         al->sym = NULL;
 615         if (thread__find_map(thread, cpumode, addr, al))
 616                 al->sym = map__find_symbol(al->map, al->addr);
 617         return al->sym;
 618 }
 619
 620 struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
 621                                       u64 addr, struct addr_location *al)
 622 {
 623         al->sym = NULL;
 624         if (thread__find_map_fb(thread, cpumode, addr, al))
 625                 al->sym = map__find_symbol(al->map, al->addr);
 626         return al->sym;
 627 }
 628
 629 /*
 630  * Callers need to drop the reference to al->thread, obtained in
 631  * machine__findnew_thread()
 632  */
 633 int machine__resolve(struct machine *machine, struct addr_location *al,
 634                      struct perf_sample *sample)
 635 {
 636         struct thread *thread = machine__findnew_thread(machine, sample->pid,
 637                                                         sample->tid);
 638
 639         if (thread == NULL)
 640                 return -1;
 641
 642         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
 643         thread__find_map(thread, sample->cpumode, sample->ip, al);
 644         dump_printf(" ...... dso: %s\n",
 645                     al->map ? al->map->dso->long_name :
 646                         al->level == 'H' ? "[hypervisor]" : "<not found>");
 647
 648         if (thread__is_filtered(thread))
 649                 al->filtered |= (1 << HIST_FILTER__THREAD);
 650
 651         al->sym = NULL;
 652         al->cpu = sample->cpu;
 653         al->socket = -1;
 654         al->srcline = NULL;
 655
 656         if (al->cpu >= 0) {
 657                 struct perf_env *env = machine->env;
 658
 659                 if (env && env->cpu)
 660                         al->socket = env->cpu[al->cpu].socket_id;
 661         }
 662
 663         if (al->map) {
 664                 struct dso *dso = al->map->dso;
 665
 666                 if (symbol_conf.dso_list &&
 667                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
 668                                                   dso->short_name) ||
 669                                (dso->short_name != dso->long_name &&
 670                                 strlist__has_entry(symbol_conf.dso_list,
 671                                                    dso->long_name))))) {
 672                         al->filtered |= (1 << HIST_FILTER__DSO);
 673                 }
 674
 675                 al->sym = map__find_symbol(al->map, al->addr);
 676         }
 677
 678         if (symbol_conf.sym_list) {
 679                 int ret = 0;
 680                 char al_addr_str[32];
 681                 size_t sz = sizeof(al_addr_str);
 682
 683                 if (al->sym) {
 684                         ret = strlist__has_entry(symbol_conf.sym_list,
 685                                                 al->sym->name);
 686                 }
 687                 if (!ret && al->sym) {
 688                         snprintf(al_addr_str, sz, "0x%"PRIx64,
 689                                 al->map->unmap_ip(al->map, al->sym->start));
 690                         ret = strlist__has_entry(symbol_conf.sym_list,
 691                                                 al_addr_str);
 692                 }
 693                 if (!ret)
 694                         al->filtered |= (1 << HIST_FILTER__SYMBOL);
 695         }
 696
 697         return 0;
 698 }
 699
 700 /*
 701  * The preprocess_sample method will return with reference counts for the
 702  * in it, when done using (and perhaps getting ref counts if needing to
 703  * keep a pointer to one of those entries) it must be paired with
 704  * addr_location__put(), so that the refcounts can be decremented.
 705  */
 706 void addr_location__put(struct addr_location *al)
 707 {
 708         thread__zput(al->thread);
 709 }
 710
 711 bool is_bts_event(struct perf_event_attr *attr)
 712 {
 713         return attr->type == PERF_TYPE_HARDWARE &&
 714                (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
 715                attr->sample_period == 1;
 716 }
 717
 718 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
 719 {
 720         if (attr->type == PERF_TYPE_SOFTWARE &&
 721             (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
 722              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
 723              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
 724                 return true;
 725
 726         if (is_bts_event(attr))
 727                 return true;
 728
 729         return false;
 730 }
 731
 732 void thread__resolve(struct thread *thread, struct addr_location *al,
 733                      struct perf_sample *sample)
 734 {
 735         thread__find_map_fb(thread, sample->cpumode, sample->addr, al);
 736
 737         al->cpu = sample->cpu;
 738         al->sym = NULL;
 739
 740         if (al->map)
 741                 al->sym = map__find_symbol(al->map, al->addr);
 742 }