linux/tools/perf/util/event.c
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   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
  38static 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
  80const 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
  89struct process_symbol_args {
  90        const char *name;
  91        u64        start;
  92};
  93
  94static 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
 111int 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
 123void 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
 147size_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
 159size_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
 186size_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
 192int 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
 200int 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
 208int 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
 216int 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
 224int 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
 232int 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
 240int 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
 248int 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
 256int 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
 264int 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
 272int 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
 280size_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
 289size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
 290{
 291        if (event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID) {
 292                char sbuild_id[SBUILD_ID_SIZE];
 293                struct build_id bid;
 294
 295                build_id__init(&bid, event->mmap2.build_id,
 296                               event->mmap2.build_id_size);
 297                build_id__sprintf(&bid, sbuild_id);
 298
 299                return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64
 300                                   " <%s>]: %c%c%c%c %s\n",
 301                               event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
 302                               event->mmap2.len, event->mmap2.pgoff, sbuild_id,
 303                               (event->mmap2.prot & PROT_READ) ? 'r' : '-',
 304                               (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
 305                               (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
 306                               (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
 307                               event->mmap2.filename);
 308        } else {
 309                return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64
 310                                   " %02x:%02x %"PRI_lu64" %"PRI_lu64"]: %c%c%c%c %s\n",
 311                               event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
 312                               event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
 313                               event->mmap2.min, event->mmap2.ino,
 314                               event->mmap2.ino_generation,
 315                               (event->mmap2.prot & PROT_READ) ? 'r' : '-',
 316                               (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
 317                               (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
 318                               (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
 319                               event->mmap2.filename);
 320        }
 321}
 322
 323size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
 324{
 325        struct perf_thread_map *threads = thread_map__new_event(&event->thread_map);
 326        size_t ret;
 327
 328        ret = fprintf(fp, " nr: ");
 329
 330        if (threads)
 331                ret += thread_map__fprintf(threads, fp);
 332        else
 333                ret += fprintf(fp, "failed to get threads from event\n");
 334
 335        perf_thread_map__put(threads);
 336        return ret;
 337}
 338
 339size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
 340{
 341        struct perf_cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
 342        size_t ret;
 343
 344        ret = fprintf(fp, ": ");
 345
 346        if (cpus)
 347                ret += cpu_map__fprintf(cpus, fp);
 348        else
 349                ret += fprintf(fp, "failed to get cpumap from event\n");
 350
 351        perf_cpu_map__put(cpus);
 352        return ret;
 353}
 354
 355int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
 356                             union perf_event *event,
 357                             struct perf_sample *sample,
 358                             struct machine *machine)
 359{
 360        return machine__process_mmap_event(machine, event, sample);
 361}
 362
 363int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
 364                             union perf_event *event,
 365                             struct perf_sample *sample,
 366                             struct machine *machine)
 367{
 368        return machine__process_mmap2_event(machine, event, sample);
 369}
 370
 371size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
 372{
 373        return fprintf(fp, "(%d:%d):(%d:%d)\n",
 374                       event->fork.pid, event->fork.tid,
 375                       event->fork.ppid, event->fork.ptid);
 376}
 377
 378int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
 379                             union perf_event *event,
 380                             struct perf_sample *sample,
 381                             struct machine *machine)
 382{
 383        return machine__process_fork_event(machine, event, sample);
 384}
 385
 386int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
 387                             union perf_event *event,
 388                             struct perf_sample *sample,
 389                             struct machine *machine)
 390{
 391        return machine__process_exit_event(machine, event, sample);
 392}
 393
 394size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
 395{
 396        return fprintf(fp, " offset: %#"PRI_lx64" size: %#"PRI_lx64" flags: %#"PRI_lx64" [%s%s%s]\n",
 397                       event->aux.aux_offset, event->aux.aux_size,
 398                       event->aux.flags,
 399                       event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
 400                       event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
 401                       event->aux.flags & PERF_AUX_FLAG_PARTIAL   ? "P" : "");
 402}
 403
 404size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
 405{
 406        return fprintf(fp, " pid: %u tid: %u\n",
 407                       event->itrace_start.pid, event->itrace_start.tid);
 408}
 409
 410size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
 411{
 412        bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
 413        const char *in_out = !out ? "IN         " :
 414                !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
 415                                    "OUT        " : "OUT preempt";
 416
 417        if (event->header.type == PERF_RECORD_SWITCH)
 418                return fprintf(fp, " %s\n", in_out);
 419
 420        return fprintf(fp, " %s  %s pid/tid: %5d/%-5d\n",
 421                       in_out, out ? "next" : "prev",
 422                       event->context_switch.next_prev_pid,
 423                       event->context_switch.next_prev_tid);
 424}
 425
 426static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
 427{
 428        return fprintf(fp, " lost %" PRI_lu64 "\n", event->lost.lost);
 429}
 430
 431size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp)
 432{
 433        return fprintf(fp, " addr %" PRI_lx64 " len %u type %u flags 0x%x name %s\n",
 434                       event->ksymbol.addr, event->ksymbol.len,
 435                       event->ksymbol.ksym_type,
 436                       event->ksymbol.flags, event->ksymbol.name);
 437}
 438
 439size_t perf_event__fprintf_bpf(union perf_event *event, FILE *fp)
 440{
 441        return fprintf(fp, " type %u, flags %u, id %u\n",
 442                       event->bpf.type, event->bpf.flags, event->bpf.id);
 443}
 444
 445static int text_poke_printer(enum binary_printer_ops op, unsigned int val,
 446                             void *extra, FILE *fp)
 447{
 448        bool old = *(bool *)extra;
 449
 450        switch ((int)op) {
 451        case BINARY_PRINT_LINE_BEGIN:
 452                return fprintf(fp, "            %s bytes:", old ? "Old" : "New");
 453        case BINARY_PRINT_NUM_DATA:
 454                return fprintf(fp, " %02x", val);
 455        case BINARY_PRINT_LINE_END:
 456                return fprintf(fp, "\n");
 457        default:
 458                return 0;
 459        }
 460}
 461
 462size_t perf_event__fprintf_text_poke(union perf_event *event, struct machine *machine, FILE *fp)
 463{
 464        struct perf_record_text_poke_event *tp = &event->text_poke;
 465        size_t ret;
 466        bool old;
 467
 468        ret = fprintf(fp, " %" PRI_lx64 " ", tp->addr);
 469        if (machine) {
 470                struct addr_location al;
 471
 472                al.map = maps__find(&machine->kmaps, tp->addr);
 473                if (al.map && map__load(al.map) >= 0) {
 474                        al.addr = al.map->map_ip(al.map, tp->addr);
 475                        al.sym = map__find_symbol(al.map, al.addr);
 476                        if (al.sym)
 477                                ret += symbol__fprintf_symname_offs(al.sym, &al, fp);
 478                }
 479        }
 480        ret += fprintf(fp, " old len %u new len %u\n", tp->old_len, tp->new_len);
 481        old = true;
 482        ret += binary__fprintf(tp->bytes, tp->old_len, 16, text_poke_printer,
 483                               &old, fp);
 484        old = false;
 485        ret += binary__fprintf(tp->bytes + tp->old_len, tp->new_len, 16,
 486                               text_poke_printer, &old, fp);
 487        return ret;
 488}
 489
 490size_t perf_event__fprintf(union perf_event *event, struct machine *machine, FILE *fp)
 491{
 492        size_t ret = fprintf(fp, "PERF_RECORD_%s",
 493                             perf_event__name(event->header.type));
 494
 495        switch (event->header.type) {
 496        case PERF_RECORD_COMM:
 497                ret += perf_event__fprintf_comm(event, fp);
 498                break;
 499        case PERF_RECORD_FORK:
 500        case PERF_RECORD_EXIT:
 501                ret += perf_event__fprintf_task(event, fp);
 502                break;
 503        case PERF_RECORD_MMAP:
 504                ret += perf_event__fprintf_mmap(event, fp);
 505                break;
 506        case PERF_RECORD_NAMESPACES:
 507                ret += perf_event__fprintf_namespaces(event, fp);
 508                break;
 509        case PERF_RECORD_CGROUP:
 510                ret += perf_event__fprintf_cgroup(event, fp);
 511                break;
 512        case PERF_RECORD_MMAP2:
 513                ret += perf_event__fprintf_mmap2(event, fp);
 514                break;
 515        case PERF_RECORD_AUX:
 516                ret += perf_event__fprintf_aux(event, fp);
 517                break;
 518        case PERF_RECORD_ITRACE_START:
 519                ret += perf_event__fprintf_itrace_start(event, fp);
 520                break;
 521        case PERF_RECORD_SWITCH:
 522        case PERF_RECORD_SWITCH_CPU_WIDE:
 523                ret += perf_event__fprintf_switch(event, fp);
 524                break;
 525        case PERF_RECORD_LOST:
 526                ret += perf_event__fprintf_lost(event, fp);
 527                break;
 528        case PERF_RECORD_KSYMBOL:
 529                ret += perf_event__fprintf_ksymbol(event, fp);
 530                break;
 531        case PERF_RECORD_BPF_EVENT:
 532                ret += perf_event__fprintf_bpf(event, fp);
 533                break;
 534        case PERF_RECORD_TEXT_POKE:
 535                ret += perf_event__fprintf_text_poke(event, machine, fp);
 536                break;
 537        default:
 538                ret += fprintf(fp, "\n");
 539        }
 540
 541        return ret;
 542}
 543
 544int perf_event__process(struct perf_tool *tool __maybe_unused,
 545                        union perf_event *event,
 546                        struct perf_sample *sample,
 547                        struct machine *machine)
 548{
 549        return machine__process_event(machine, event, sample);
 550}
 551
 552struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
 553                             struct addr_location *al)
 554{
 555        struct maps *maps = thread->maps;
 556        struct machine *machine = maps->machine;
 557        bool load_map = false;
 558
 559        al->maps = maps;
 560        al->thread = thread;
 561        al->addr = addr;
 562        al->cpumode = cpumode;
 563        al->filtered = 0;
 564
 565        if (machine == NULL) {
 566                al->map = NULL;
 567                return NULL;
 568        }
 569
 570        if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
 571                al->level = 'k';
 572                al->maps = maps = &machine->kmaps;
 573                load_map = true;
 574        } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
 575                al->level = '.';
 576        } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
 577                al->level = 'g';
 578                al->maps = maps = &machine->kmaps;
 579                load_map = true;
 580        } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
 581                al->level = 'u';
 582        } else {
 583                al->level = 'H';
 584                al->map = NULL;
 585
 586                if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
 587                        cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
 588                        !perf_guest)
 589                        al->filtered |= (1 << HIST_FILTER__GUEST);
 590                if ((cpumode == PERF_RECORD_MISC_USER ||
 591                        cpumode == PERF_RECORD_MISC_KERNEL) &&
 592                        !perf_host)
 593                        al->filtered |= (1 << HIST_FILTER__HOST);
 594
 595                return NULL;
 596        }
 597
 598        al->map = maps__find(maps, al->addr);
 599        if (al->map != NULL) {
 600                /*
 601                 * Kernel maps might be changed when loading symbols so loading
 602                 * must be done prior to using kernel maps.
 603                 */
 604                if (load_map)
 605                        map__load(al->map);
 606                al->addr = al->map->map_ip(al->map, al->addr);
 607        }
 608
 609        return al->map;
 610}
 611
 612/*
 613 * For branch stacks or branch samples, the sample cpumode might not be correct
 614 * because it applies only to the sample 'ip' and not necessary to 'addr' or
 615 * branch stack addresses. If possible, use a fallback to deal with those cases.
 616 */
 617struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
 618                                struct addr_location *al)
 619{
 620        struct map *map = thread__find_map(thread, cpumode, addr, al);
 621        struct machine *machine = thread->maps->machine;
 622        u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
 623
 624        if (map || addr_cpumode == cpumode)
 625                return map;
 626
 627        return thread__find_map(thread, addr_cpumode, addr, al);
 628}
 629
 630struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
 631                                   u64 addr, struct addr_location *al)
 632{
 633        al->sym = NULL;
 634        if (thread__find_map(thread, cpumode, addr, al))
 635                al->sym = map__find_symbol(al->map, al->addr);
 636        return al->sym;
 637}
 638
 639struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
 640                                      u64 addr, struct addr_location *al)
 641{
 642        al->sym = NULL;
 643        if (thread__find_map_fb(thread, cpumode, addr, al))
 644                al->sym = map__find_symbol(al->map, al->addr);
 645        return al->sym;
 646}
 647
 648static bool check_address_range(struct intlist *addr_list, int addr_range,
 649                                unsigned long addr)
 650{
 651        struct int_node *pos;
 652
 653        intlist__for_each_entry(pos, addr_list) {
 654                if (addr >= pos->i && addr < pos->i + addr_range)
 655                        return true;
 656        }
 657
 658        return false;
 659}
 660
 661/*
 662 * Callers need to drop the reference to al->thread, obtained in
 663 * machine__findnew_thread()
 664 */
 665int machine__resolve(struct machine *machine, struct addr_location *al,
 666                     struct perf_sample *sample)
 667{
 668        struct thread *thread = machine__findnew_thread(machine, sample->pid,
 669                                                        sample->tid);
 670
 671        if (thread == NULL)
 672                return -1;
 673
 674        dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
 675        thread__find_map(thread, sample->cpumode, sample->ip, al);
 676        dump_printf(" ...... dso: %s\n",
 677                    al->map ? al->map->dso->long_name :
 678                        al->level == 'H' ? "[hypervisor]" : "<not found>");
 679
 680        if (thread__is_filtered(thread))
 681                al->filtered |= (1 << HIST_FILTER__THREAD);
 682
 683        al->sym = NULL;
 684        al->cpu = sample->cpu;
 685        al->socket = -1;
 686        al->srcline = NULL;
 687
 688        if (al->cpu >= 0) {
 689                struct perf_env *env = machine->env;
 690
 691                if (env && env->cpu)
 692                        al->socket = env->cpu[al->cpu].socket_id;
 693        }
 694
 695        if (al->map) {
 696                struct dso *dso = al->map->dso;
 697
 698                if (symbol_conf.dso_list &&
 699                    (!dso || !(strlist__has_entry(symbol_conf.dso_list,
 700                                                  dso->short_name) ||
 701                               (dso->short_name != dso->long_name &&
 702                                strlist__has_entry(symbol_conf.dso_list,
 703                                                   dso->long_name))))) {
 704                        al->filtered |= (1 << HIST_FILTER__DSO);
 705                }
 706
 707                al->sym = map__find_symbol(al->map, al->addr);
 708        } else if (symbol_conf.dso_list) {
 709                al->filtered |= (1 << HIST_FILTER__DSO);
 710        }
 711
 712        if (symbol_conf.sym_list) {
 713                int ret = 0;
 714                char al_addr_str[32];
 715                size_t sz = sizeof(al_addr_str);
 716
 717                if (al->sym) {
 718                        ret = strlist__has_entry(symbol_conf.sym_list,
 719                                                al->sym->name);
 720                }
 721                if (!ret && al->sym) {
 722                        snprintf(al_addr_str, sz, "0x%"PRIx64,
 723                                al->map->unmap_ip(al->map, al->sym->start));
 724                        ret = strlist__has_entry(symbol_conf.sym_list,
 725                                                al_addr_str);
 726                }
 727                if (!ret && symbol_conf.addr_list && al->map) {
 728                        unsigned long addr = al->map->unmap_ip(al->map, al->addr);
 729
 730                        ret = intlist__has_entry(symbol_conf.addr_list, addr);
 731                        if (!ret && symbol_conf.addr_range) {
 732                                ret = check_address_range(symbol_conf.addr_list,
 733                                                          symbol_conf.addr_range,
 734                                                          addr);
 735                        }
 736                }
 737
 738                if (!ret)
 739                        al->filtered |= (1 << HIST_FILTER__SYMBOL);
 740        }
 741
 742        return 0;
 743}
 744
 745/*
 746 * The preprocess_sample method will return with reference counts for the
 747 * in it, when done using (and perhaps getting ref counts if needing to
 748 * keep a pointer to one of those entries) it must be paired with
 749 * addr_location__put(), so that the refcounts can be decremented.
 750 */
 751void addr_location__put(struct addr_location *al)
 752{
 753        thread__zput(al->thread);
 754}
 755
 756bool is_bts_event(struct perf_event_attr *attr)
 757{
 758        return attr->type == PERF_TYPE_HARDWARE &&
 759               (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
 760               attr->sample_period == 1;
 761}
 762
 763bool sample_addr_correlates_sym(struct perf_event_attr *attr)
 764{
 765        if (attr->type == PERF_TYPE_SOFTWARE &&
 766            (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
 767             attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
 768             attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
 769                return true;
 770
 771        if (is_bts_event(attr))
 772                return true;
 773
 774        return false;
 775}
 776
 777void thread__resolve(struct thread *thread, struct addr_location *al,
 778                     struct perf_sample *sample)
 779{
 780        thread__find_map_fb(thread, sample->cpumode, sample->addr, al);
 781
 782        al->cpu = sample->cpu;
 783        al->sym = NULL;
 784
 785        if (al->map)
 786                al->sym = map__find_symbol(al->map, al->addr);
 787}
 788