tools/perf/util/bpf-event.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <errno.h>
   3 #include <stdlib.h>
   4 #include <bpf/bpf.h>
   5 #include <bpf/btf.h>
   6 #include <bpf/libbpf.h>
   7 #include <linux/btf.h>
   8 #include <linux/err.h>
   9 #include <linux/string.h>
  10 #include <internal/lib.h>
  11 #include <symbol/kallsyms.h>
  12 #include "bpf-event.h"
  13 #include "bpf-utils.h"
  14 #include "debug.h"
  15 #include "dso.h"
  16 #include "symbol.h"
  17 #include "machine.h"
  18 #include "env.h"
  19 #include "session.h"
  20 #include "map.h"
  21 #include "evlist.h"
  22 #include "record.h"
  23 #include "util/synthetic-events.h"
  24
  25 #ifndef HAVE_LIBBPF_BTF__LOAD_FROM_KERNEL_BY_ID
  26 struct btf *btf__load_from_kernel_by_id(__u32 id)
  27 {
  28        struct btf *btf;
  29 #pragma GCC diagnostic push
  30 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
  31        int err = btf__get_from_id(id, &btf);
  32 #pragma GCC diagnostic pop
  33
  34        return err ? ERR_PTR(err) : btf;
  35 }
  36 #endif
  37
  38 #ifndef HAVE_LIBBPF_BPF_PROG_LOAD
  39 int bpf_prog_load(enum bpf_prog_type prog_type,
  40                   const char *prog_name __maybe_unused,
  41                   const char *license,
  42                   const struct bpf_insn *insns, size_t insn_cnt,
  43                   const struct bpf_prog_load_opts *opts)
  44 {
  45 #pragma GCC diagnostic push
  46 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
  47         return bpf_load_program(prog_type, insns, insn_cnt, license,
  48                                 opts->kern_version, opts->log_buf, opts->log_size);
  49 #pragma GCC diagnostic pop
  50 }
  51 #endif
  52
  53 #ifndef HAVE_LIBBPF_BPF_OBJECT__NEXT_PROGRAM
  54 struct bpf_program *
  55 bpf_object__next_program(const struct bpf_object *obj, struct bpf_program *prev)
  56 {
  57 #pragma GCC diagnostic push
  58 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
  59         return bpf_program__next(prev, obj);
  60 #pragma GCC diagnostic pop
  61 }
  62 #endif
  63
  64 #ifndef HAVE_LIBBPF_BPF_OBJECT__NEXT_MAP
  65 struct bpf_map *
  66 bpf_object__next_map(const struct bpf_object *obj, const struct bpf_map *prev)
  67 {
  68 #pragma GCC diagnostic push
  69 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
  70         return bpf_map__next(prev, obj);
  71 #pragma GCC diagnostic pop
  72 }
  73 #endif
  74
  75 #ifndef HAVE_LIBBPF_BTF__RAW_DATA
  76 const void *
  77 btf__raw_data(const struct btf *btf_ro, __u32 *size)
  78 {
  79 #pragma GCC diagnostic push
  80 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
  81         return btf__get_raw_data(btf_ro, size);
  82 #pragma GCC diagnostic pop
  83 }
  84 #endif
  85
  86 static int snprintf_hex(char *buf, size_t size, unsigned char *data, size_t len)
  87 {
  88         int ret = 0;
  89         size_t i;
  90
  91         for (i = 0; i < len; i++)
  92                 ret += snprintf(buf + ret, size - ret, "%02x", data[i]);
  93         return ret;
  94 }
  95
  96 static int machine__process_bpf_event_load(struct machine *machine,
  97                                            union perf_event *event,
  98                                            struct perf_sample *sample __maybe_unused)
  99 {
 100         struct bpf_prog_info_node *info_node;
 101         struct perf_env *env = machine->env;
 102         struct perf_bpil *info_linear;
 103         int id = event->bpf.id;
 104         unsigned int i;
 105
 106         /* perf-record, no need to handle bpf-event */
 107         if (env == NULL)
 108                 return 0;
 109
 110         info_node = perf_env__find_bpf_prog_info(env, id);
 111         if (!info_node)
 112                 return 0;
 113         info_linear = info_node->info_linear;
 114
 115         for (i = 0; i < info_linear->info.nr_jited_ksyms; i++) {
 116                 u64 *addrs = (u64 *)(uintptr_t)(info_linear->info.jited_ksyms);
 117                 u64 addr = addrs[i];
 118                 struct map *map = maps__find(machine__kernel_maps(machine), addr);
 119
 120                 if (map) {
 121                         map->dso->binary_type = DSO_BINARY_TYPE__BPF_PROG_INFO;
 122                         map->dso->bpf_prog.id = id;
 123                         map->dso->bpf_prog.sub_id = i;
 124                         map->dso->bpf_prog.env = env;
 125                 }
 126         }
 127         return 0;
 128 }
 129
 130 int machine__process_bpf(struct machine *machine, union perf_event *event,
 131                          struct perf_sample *sample)
 132 {
 133         if (dump_trace)
 134                 perf_event__fprintf_bpf(event, stdout);
 135
 136         switch (event->bpf.type) {
 137         case PERF_BPF_EVENT_PROG_LOAD:
 138                 return machine__process_bpf_event_load(machine, event, sample);
 139
 140         case PERF_BPF_EVENT_PROG_UNLOAD:
 141                 /*
 142                  * Do not free bpf_prog_info and btf of the program here,
 143                  * as annotation still need them. They will be freed at
 144                  * the end of the session.
 145                  */
 146                 break;
 147         default:
 148                 pr_debug("unexpected bpf event type of %d\n", event->bpf.type);
 149                 break;
 150         }
 151         return 0;
 152 }
 153
 154 static int perf_env__fetch_btf(struct perf_env *env,
 155                                u32 btf_id,
 156                                struct btf *btf)
 157 {
 158         struct btf_node *node;
 159         u32 data_size;
 160         const void *data;
 161
 162         data = btf__raw_data(btf, &data_size);
 163
 164         node = malloc(data_size + sizeof(struct btf_node));
 165         if (!node)
 166                 return -1;
 167
 168         node->id = btf_id;
 169         node->data_size = data_size;
 170         memcpy(node->data, data, data_size);
 171
 172         if (!perf_env__insert_btf(env, node)) {
 173                 /* Insertion failed because of a duplicate. */
 174                 free(node);
 175                 return -1;
 176         }
 177         return 0;
 178 }
 179
 180 static int synthesize_bpf_prog_name(char *buf, int size,
 181                                     struct bpf_prog_info *info,
 182                                     struct btf *btf,
 183                                     u32 sub_id)
 184 {
 185         u8 (*prog_tags)[BPF_TAG_SIZE] = (void *)(uintptr_t)(info->prog_tags);
 186         void *func_infos = (void *)(uintptr_t)(info->func_info);
 187         u32 sub_prog_cnt = info->nr_jited_ksyms;
 188         const struct bpf_func_info *finfo;
 189         const char *short_name = NULL;
 190         const struct btf_type *t;
 191         int name_len;
 192
 193         name_len = snprintf(buf, size, "bpf_prog_");
 194         name_len += snprintf_hex(buf + name_len, size - name_len,
 195                                  prog_tags[sub_id], BPF_TAG_SIZE);
 196         if (btf) {
 197                 finfo = func_infos + sub_id * info->func_info_rec_size;
 198                 t = btf__type_by_id(btf, finfo->type_id);
 199                 short_name = btf__name_by_offset(btf, t->name_off);
 200         } else if (sub_id == 0 && sub_prog_cnt == 1) {
 201                 /* no subprog */
 202                 if (info->name[0])
 203                         short_name = info->name;
 204         } else
 205                 short_name = "F";
 206         if (short_name)
 207                 name_len += snprintf(buf + name_len, size - name_len,
 208                                      "_%s", short_name);
 209         return name_len;
 210 }
 211
 212 /*
 213  * Synthesize PERF_RECORD_KSYMBOL and PERF_RECORD_BPF_EVENT for one bpf
 214  * program. One PERF_RECORD_BPF_EVENT is generated for the program. And
 215  * one PERF_RECORD_KSYMBOL is generated for each sub program.
 216  *
 217  * Returns:
 218  *    0 for success;
 219  *   -1 for failures;
 220  *   -2 for lack of kernel support.
 221  */
 222 static int perf_event__synthesize_one_bpf_prog(struct perf_session *session,
 223                                                perf_event__handler_t process,
 224                                                struct machine *machine,
 225                                                int fd,
 226                                                union perf_event *event,
 227                                                struct record_opts *opts)
 228 {
 229         struct perf_record_ksymbol *ksymbol_event = &event->ksymbol;
 230         struct perf_record_bpf_event *bpf_event = &event->bpf;
 231         struct perf_tool *tool = session->tool;
 232         struct bpf_prog_info_node *info_node;
 233         struct perf_bpil *info_linear;
 234         struct bpf_prog_info *info;
 235         struct btf *btf = NULL;
 236         struct perf_env *env;
 237         u32 sub_prog_cnt, i;
 238         int err = 0;
 239         u64 arrays;
 240
 241         /*
 242          * for perf-record and perf-report use header.env;
 243          * otherwise, use global perf_env.
 244          */
 245         env = session->data ? &session->header.env : &perf_env;
 246
 247         arrays = 1UL << PERF_BPIL_JITED_KSYMS;
 248         arrays |= 1UL << PERF_BPIL_JITED_FUNC_LENS;
 249         arrays |= 1UL << PERF_BPIL_FUNC_INFO;
 250         arrays |= 1UL << PERF_BPIL_PROG_TAGS;
 251         arrays |= 1UL << PERF_BPIL_JITED_INSNS;
 252         arrays |= 1UL << PERF_BPIL_LINE_INFO;
 253         arrays |= 1UL << PERF_BPIL_JITED_LINE_INFO;
 254
 255         info_linear = get_bpf_prog_info_linear(fd, arrays);
 256         if (IS_ERR_OR_NULL(info_linear)) {
 257                 info_linear = NULL;
 258                 pr_debug("%s: failed to get BPF program info. aborting\n", __func__);
 259                 return -1;
 260         }
 261
 262         if (info_linear->info_len < offsetof(struct bpf_prog_info, prog_tags)) {
 263                 free(info_linear);
 264                 pr_debug("%s: the kernel is too old, aborting\n", __func__);
 265                 return -2;
 266         }
 267
 268         info = &info_linear->info;
 269         if (!info->jited_ksyms) {
 270                 free(info_linear);
 271                 return -1;
 272         }
 273
 274         /* number of ksyms, func_lengths, and tags should match */
 275         sub_prog_cnt = info->nr_jited_ksyms;
 276         if (sub_prog_cnt != info->nr_prog_tags ||
 277             sub_prog_cnt != info->nr_jited_func_lens) {
 278                 free(info_linear);
 279                 return -1;
 280         }
 281
 282         /* check BTF func info support */
 283         if (info->btf_id && info->nr_func_info && info->func_info_rec_size) {
 284                 /* btf func info number should be same as sub_prog_cnt */
 285                 if (sub_prog_cnt != info->nr_func_info) {
 286                         pr_debug("%s: mismatch in BPF sub program count and BTF function info count, aborting\n", __func__);
 287                         free(info_linear);
 288                         return -1;
 289                 }
 290                 btf = btf__load_from_kernel_by_id(info->btf_id);
 291                 if (libbpf_get_error(btf)) {
 292                         pr_debug("%s: failed to get BTF of id %u, aborting\n", __func__, info->btf_id);
 293                         err = -1;
 294                         goto out;
 295                 }
 296                 perf_env__fetch_btf(env, info->btf_id, btf);
 297         }
 298
 299         /* Synthesize PERF_RECORD_KSYMBOL */
 300         for (i = 0; i < sub_prog_cnt; i++) {
 301                 __u32 *prog_lens = (__u32 *)(uintptr_t)(info->jited_func_lens);
 302                 __u64 *prog_addrs = (__u64 *)(uintptr_t)(info->jited_ksyms);
 303                 int name_len;
 304
 305                 *ksymbol_event = (struct perf_record_ksymbol) {
 306                         .header = {
 307                                 .type = PERF_RECORD_KSYMBOL,
 308                                 .size = offsetof(struct perf_record_ksymbol, name),
 309                         },
 310                         .addr = prog_addrs[i],
 311                         .len = prog_lens[i],
 312                         .ksym_type = PERF_RECORD_KSYMBOL_TYPE_BPF,
 313                         .flags = 0,
 314                 };
 315
 316                 name_len = synthesize_bpf_prog_name(ksymbol_event->name,
 317                                                     KSYM_NAME_LEN, info, btf, i);
 318                 ksymbol_event->header.size += PERF_ALIGN(name_len + 1,
 319                                                          sizeof(u64));
 320
 321                 memset((void *)event + event->header.size, 0, machine->id_hdr_size);
 322                 event->header.size += machine->id_hdr_size;
 323                 err = perf_tool__process_synth_event(tool, event,
 324                                                      machine, process);
 325         }
 326
 327         if (!opts->no_bpf_event) {
 328                 /* Synthesize PERF_RECORD_BPF_EVENT */
 329                 *bpf_event = (struct perf_record_bpf_event) {
 330                         .header = {
 331                                 .type = PERF_RECORD_BPF_EVENT,
 332                                 .size = sizeof(struct perf_record_bpf_event),
 333                         },
 334                         .type = PERF_BPF_EVENT_PROG_LOAD,
 335                         .flags = 0,
 336                         .id = info->id,
 337                 };
 338                 memcpy(bpf_event->tag, info->tag, BPF_TAG_SIZE);
 339                 memset((void *)event + event->header.size, 0, machine->id_hdr_size);
 340                 event->header.size += machine->id_hdr_size;
 341
 342                 /* save bpf_prog_info to env */
 343                 info_node = malloc(sizeof(struct bpf_prog_info_node));
 344                 if (!info_node) {
 345                         err = -1;
 346                         goto out;
 347                 }
 348
 349                 info_node->info_linear = info_linear;
 350                 perf_env__insert_bpf_prog_info(env, info_node);
 351                 info_linear = NULL;
 352
 353                 /*
 354                  * process after saving bpf_prog_info to env, so that
 355                  * required information is ready for look up
 356                  */
 357                 err = perf_tool__process_synth_event(tool, event,
 358                                                      machine, process);
 359         }
 360
 361 out:
 362         free(info_linear);
 363         btf__free(btf);
 364         return err ? -1 : 0;
 365 }
 366
 367 struct kallsyms_parse {
 368         union perf_event        *event;
 369         perf_event__handler_t    process;
 370         struct machine          *machine;
 371         struct perf_tool        *tool;
 372 };
 373
 374 static int
 375 process_bpf_image(char *name, u64 addr, struct kallsyms_parse *data)
 376 {
 377         struct machine *machine = data->machine;
 378         union perf_event *event = data->event;
 379         struct perf_record_ksymbol *ksymbol;
 380         int len;
 381
 382         ksymbol = &event->ksymbol;
 383
 384         *ksymbol = (struct perf_record_ksymbol) {
 385                 .header = {
 386                         .type = PERF_RECORD_KSYMBOL,
 387                         .size = offsetof(struct perf_record_ksymbol, name),
 388                 },
 389                 .addr      = addr,
 390                 .len       = page_size,
 391                 .ksym_type = PERF_RECORD_KSYMBOL_TYPE_BPF,
 392                 .flags     = 0,
 393         };
 394
 395         len = scnprintf(ksymbol->name, KSYM_NAME_LEN, "%s", name);
 396         ksymbol->header.size += PERF_ALIGN(len + 1, sizeof(u64));
 397         memset((void *) event + event->header.size, 0, machine->id_hdr_size);
 398         event->header.size += machine->id_hdr_size;
 399
 400         return perf_tool__process_synth_event(data->tool, event, machine,
 401                                               data->process);
 402 }
 403
 404 static int
 405 kallsyms_process_symbol(void *data, const char *_name,
 406                         char type __maybe_unused, u64 start)
 407 {
 408         char disp[KSYM_NAME_LEN];
 409         char *module, *name;
 410         unsigned long id;
 411         int err = 0;
 412
 413         module = strchr(_name, '\t');
 414         if (!module)
 415                 return 0;
 416
 417         /* We are going after [bpf] module ... */
 418         if (strcmp(module + 1, "[bpf]"))
 419                 return 0;
 420
 421         name = memdup(_name, (module - _name) + 1);
 422         if (!name)
 423                 return -ENOMEM;
 424
 425         name[module - _name] = 0;
 426
 427         /* .. and only for trampolines and dispatchers */
 428         if ((sscanf(name, "bpf_trampoline_%lu", &id) == 1) ||
 429             (sscanf(name, "bpf_dispatcher_%s", disp) == 1))
 430                 err = process_bpf_image(name, start, data);
 431
 432         free(name);
 433         return err;
 434 }
 435
 436 int perf_event__synthesize_bpf_events(struct perf_session *session,
 437                                       perf_event__handler_t process,
 438                                       struct machine *machine,
 439                                       struct record_opts *opts)
 440 {
 441         const char *kallsyms_filename = "/proc/kallsyms";
 442         struct kallsyms_parse arg;
 443         union perf_event *event;
 444         __u32 id = 0;
 445         int err;
 446         int fd;
 447
 448         event = malloc(sizeof(event->bpf) + KSYM_NAME_LEN + machine->id_hdr_size);
 449         if (!event)
 450                 return -1;
 451
 452         /* Synthesize all the bpf programs in system. */
 453         while (true) {
 454                 err = bpf_prog_get_next_id(id, &id);
 455                 if (err) {
 456                         if (errno == ENOENT) {
 457                                 err = 0;
 458                                 break;
 459                         }
 460                         pr_debug("%s: can't get next program: %s%s\n",
 461                                  __func__, strerror(errno),
 462                                  errno == EINVAL ? " -- kernel too old?" : "");
 463                         /* don't report error on old kernel or EPERM  */
 464                         err = (errno == EINVAL || errno == EPERM) ? 0 : -1;
 465                         break;
 466                 }
 467                 fd = bpf_prog_get_fd_by_id(id);
 468                 if (fd < 0) {
 469                         pr_debug("%s: failed to get fd for prog_id %u\n",
 470                                  __func__, id);
 471                         continue;
 472                 }
 473
 474                 err = perf_event__synthesize_one_bpf_prog(session, process,
 475                                                           machine, fd,
 476                                                           event, opts);
 477                 close(fd);
 478                 if (err) {
 479                         /* do not return error for old kernel */
 480                         if (err == -2)
 481                                 err = 0;
 482                         break;
 483                 }
 484         }
 485
 486         /* Synthesize all the bpf images - trampolines/dispatchers. */
 487         if (symbol_conf.kallsyms_name != NULL)
 488                 kallsyms_filename = symbol_conf.kallsyms_name;
 489
 490         arg = (struct kallsyms_parse) {
 491                 .event   = event,
 492                 .process = process,
 493                 .machine = machine,
 494                 .tool    = session->tool,
 495         };
 496
 497         if (kallsyms__parse(kallsyms_filename, &arg, kallsyms_process_symbol)) {
 498                 pr_err("%s: failed to synthesize bpf images: %s\n",
 499                        __func__, strerror(errno));
 500         }
 501
 502         free(event);
 503         return err;
 504 }
 505
 506 static void perf_env__add_bpf_info(struct perf_env *env, u32 id)
 507 {
 508         struct bpf_prog_info_node *info_node;
 509         struct perf_bpil *info_linear;
 510         struct btf *btf = NULL;
 511         u64 arrays;
 512         u32 btf_id;
 513         int fd;
 514
 515         fd = bpf_prog_get_fd_by_id(id);
 516         if (fd < 0)
 517                 return;
 518
 519         arrays = 1UL << PERF_BPIL_JITED_KSYMS;
 520         arrays |= 1UL << PERF_BPIL_JITED_FUNC_LENS;
 521         arrays |= 1UL << PERF_BPIL_FUNC_INFO;
 522         arrays |= 1UL << PERF_BPIL_PROG_TAGS;
 523         arrays |= 1UL << PERF_BPIL_JITED_INSNS;
 524         arrays |= 1UL << PERF_BPIL_LINE_INFO;
 525         arrays |= 1UL << PERF_BPIL_JITED_LINE_INFO;
 526
 527         info_linear = get_bpf_prog_info_linear(fd, arrays);
 528         if (IS_ERR_OR_NULL(info_linear)) {
 529                 pr_debug("%s: failed to get BPF program info. aborting\n", __func__);
 530                 goto out;
 531         }
 532
 533         btf_id = info_linear->info.btf_id;
 534
 535         info_node = malloc(sizeof(struct bpf_prog_info_node));
 536         if (info_node) {
 537                 info_node->info_linear = info_linear;
 538                 perf_env__insert_bpf_prog_info(env, info_node);
 539         } else
 540                 free(info_linear);
 541
 542         if (btf_id == 0)
 543                 goto out;
 544
 545         btf = btf__load_from_kernel_by_id(btf_id);
 546         if (libbpf_get_error(btf)) {
 547                 pr_debug("%s: failed to get BTF of id %u, aborting\n",
 548                          __func__, btf_id);
 549                 goto out;
 550         }
 551         perf_env__fetch_btf(env, btf_id, btf);
 552
 553 out:
 554         btf__free(btf);
 555         close(fd);
 556 }
 557
 558 static int bpf_event__sb_cb(union perf_event *event, void *data)
 559 {
 560         struct perf_env *env = data;
 561
 562         if (event->header.type != PERF_RECORD_BPF_EVENT)
 563                 return -1;
 564
 565         switch (event->bpf.type) {
 566         case PERF_BPF_EVENT_PROG_LOAD:
 567                 perf_env__add_bpf_info(env, event->bpf.id);
 568
 569         case PERF_BPF_EVENT_PROG_UNLOAD:
 570                 /*
 571                  * Do not free bpf_prog_info and btf of the program here,
 572                  * as annotation still need them. They will be freed at
 573                  * the end of the session.
 574                  */
 575                 break;
 576         default:
 577                 pr_debug("unexpected bpf event type of %d\n", event->bpf.type);
 578                 break;
 579         }
 580
 581         return 0;
 582 }
 583
 584 int evlist__add_bpf_sb_event(struct evlist *evlist, struct perf_env *env)
 585 {
 586         struct perf_event_attr attr = {
 587                 .type             = PERF_TYPE_SOFTWARE,
 588                 .config           = PERF_COUNT_SW_DUMMY,
 589                 .sample_id_all    = 1,
 590                 .watermark        = 1,
 591                 .bpf_event        = 1,
 592                 .size      = sizeof(attr), /* to capture ABI version */
 593         };
 594
 595         /*
 596          * Older gcc versions don't support designated initializers, like above,
 597          * for unnamed union members, such as the following:
 598          */
 599         attr.wakeup_watermark = 1;
 600
 601         return evlist__add_sb_event(evlist, &attr, bpf_event__sb_cb, env);
 602 }
 603
 604 void bpf_event__print_bpf_prog_info(struct bpf_prog_info *info,
 605                                     struct perf_env *env,
 606                                     FILE *fp)
 607 {
 608         __u32 *prog_lens = (__u32 *)(uintptr_t)(info->jited_func_lens);
 609         __u64 *prog_addrs = (__u64 *)(uintptr_t)(info->jited_ksyms);
 610         char name[KSYM_NAME_LEN];
 611         struct btf *btf = NULL;
 612         u32 sub_prog_cnt, i;
 613
 614         sub_prog_cnt = info->nr_jited_ksyms;
 615         if (sub_prog_cnt != info->nr_prog_tags ||
 616             sub_prog_cnt != info->nr_jited_func_lens)
 617                 return;
 618
 619         if (info->btf_id) {
 620                 struct btf_node *node;
 621
 622                 node = perf_env__find_btf(env, info->btf_id);
 623                 if (node)
 624                         btf = btf__new((__u8 *)(node->data),
 625                                        node->data_size);
 626         }
 627
 628         if (sub_prog_cnt == 1) {
 629                 synthesize_bpf_prog_name(name, KSYM_NAME_LEN, info, btf, 0);
 630                 fprintf(fp, "# bpf_prog_info %u: %s addr 0x%llx size %u\n",
 631                         info->id, name, prog_addrs[0], prog_lens[0]);
 632                 goto out;
 633         }
 634
 635         fprintf(fp, "# bpf_prog_info %u:\n", info->id);
 636         for (i = 0; i < sub_prog_cnt; i++) {
 637                 synthesize_bpf_prog_name(name, KSYM_NAME_LEN, info, btf, i);
 638
 639                 fprintf(fp, "# \tsub_prog %u: %s addr 0x%llx size %u\n",
 640                         i, name, prog_addrs[i], prog_lens[i]);
 641         }
 642 out:
 643         btf__free(btf);
 644 }