tools/perf/util/map.c

   1 #include "symbol.h"
   2 #include <errno.h>
   3 #include <inttypes.h>
   4 #include <limits.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <stdio.h>
   8 #include <unistd.h>
   9 #include "map.h"
  10 #include "thread.h"
  11 #include "strlist.h"
  12 #include "vdso.h"
  13 #include "build-id.h"
  14 #include "util.h"
  15 #include "debug.h"
  16 #include "machine.h"
  17 #include <linux/string.h>
  18
  19 static void __maps__insert(struct maps *maps, struct map *map);
  20
  21 const char *map_type__name[MAP__NR_TYPES] = {
  22         [MAP__FUNCTION] = "Functions",
  23         [MAP__VARIABLE] = "Variables",
  24 };
  25
  26 static inline int is_anon_memory(const char *filename)
  27 {
  28         return !strcmp(filename, "//anon") ||
  29                !strcmp(filename, "/dev/zero (deleted)") ||
  30                !strcmp(filename, "/anon_hugepage (deleted)");
  31 }
  32
  33 static inline int is_no_dso_memory(const char *filename)
  34 {
  35         return !strncmp(filename, "[stack", 6) ||
  36                !strncmp(filename, "/SYSV",5)   ||
  37                !strcmp(filename, "[heap]");
  38 }
  39
  40 static inline int is_android_lib(const char *filename)
  41 {
  42         return !strncmp(filename, "/data/app-lib", 13) ||
  43                !strncmp(filename, "/system/lib", 11);
  44 }
  45
  46 static inline bool replace_android_lib(const char *filename, char *newfilename)
  47 {
  48         const char *libname;
  49         char *app_abi;
  50         size_t app_abi_length, new_length;
  51         size_t lib_length = 0;
  52
  53         libname  = strrchr(filename, '/');
  54         if (libname)
  55                 lib_length = strlen(libname);
  56
  57         app_abi = getenv("APP_ABI");
  58         if (!app_abi)
  59                 return false;
  60
  61         app_abi_length = strlen(app_abi);
  62
  63         if (!strncmp(filename, "/data/app-lib", 13)) {
  64                 char *apk_path;
  65
  66                 if (!app_abi_length)
  67                         return false;
  68
  69                 new_length = 7 + app_abi_length + lib_length;
  70
  71                 apk_path = getenv("APK_PATH");
  72                 if (apk_path) {
  73                         new_length += strlen(apk_path) + 1;
  74                         if (new_length > PATH_MAX)
  75                                 return false;
  76                         snprintf(newfilename, new_length,
  77                                  "%s/libs/%s/%s", apk_path, app_abi, libname);
  78                 } else {
  79                         if (new_length > PATH_MAX)
  80                                 return false;
  81                         snprintf(newfilename, new_length,
  82                                  "libs/%s/%s", app_abi, libname);
  83                 }
  84                 return true;
  85         }
  86
  87         if (!strncmp(filename, "/system/lib/", 11)) {
  88                 char *ndk, *app;
  89                 const char *arch;
  90                 size_t ndk_length;
  91                 size_t app_length;
  92
  93                 ndk = getenv("NDK_ROOT");
  94                 app = getenv("APP_PLATFORM");
  95
  96                 if (!(ndk && app))
  97                         return false;
  98
  99                 ndk_length = strlen(ndk);
 100                 app_length = strlen(app);
 101
 102                 if (!(ndk_length && app_length && app_abi_length))
 103                         return false;
 104
 105                 arch = !strncmp(app_abi, "arm", 3) ? "arm" :
 106                        !strncmp(app_abi, "mips", 4) ? "mips" :
 107                        !strncmp(app_abi, "x86", 3) ? "x86" : NULL;
 108
 109                 if (!arch)
 110                         return false;
 111
 112                 new_length = 27 + ndk_length +
 113                              app_length + lib_length
 114                            + strlen(arch);
 115
 116                 if (new_length > PATH_MAX)
 117                         return false;
 118                 snprintf(newfilename, new_length,
 119                         "%s/platforms/%s/arch-%s/usr/lib/%s",
 120                         ndk, app, arch, libname);
 121
 122                 return true;
 123         }
 124         return false;
 125 }
 126
 127 void map__init(struct map *map, enum map_type type,
 128                u64 start, u64 end, u64 pgoff, struct dso *dso)
 129 {
 130         map->type     = type;
 131         map->start    = start;
 132         map->end      = end;
 133         map->pgoff    = pgoff;
 134         map->reloc    = 0;
 135         map->dso      = dso__get(dso);
 136         map->map_ip   = map__map_ip;
 137         map->unmap_ip = map__unmap_ip;
 138         RB_CLEAR_NODE(&map->rb_node);
 139         map->groups   = NULL;
 140         map->erange_warned = false;
 141         atomic_set(&map->refcnt, 1);
 142 }
 143
 144 struct map *map__new(struct machine *machine, u64 start, u64 len,
 145                      u64 pgoff, u32 pid, u32 d_maj, u32 d_min, u64 ino,
 146                      u64 ino_gen, u32 prot, u32 flags, char *filename,
 147                      enum map_type type, struct thread *thread)
 148 {
 149         struct map *map = malloc(sizeof(*map));
 150
 151         if (map != NULL) {
 152                 char newfilename[PATH_MAX];
 153                 struct dso *dso;
 154                 int anon, no_dso, vdso, android;
 155
 156                 android = is_android_lib(filename);
 157                 anon = is_anon_memory(filename);
 158                 vdso = is_vdso_map(filename);
 159                 no_dso = is_no_dso_memory(filename);
 160
 161                 map->maj = d_maj;
 162                 map->min = d_min;
 163                 map->ino = ino;
 164                 map->ino_generation = ino_gen;
 165                 map->prot = prot;
 166                 map->flags = flags;
 167
 168                 if ((anon || no_dso) && type == MAP__FUNCTION) {
 169                         snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", pid);
 170                         filename = newfilename;
 171                 }
 172
 173                 if (android) {
 174                         if (replace_android_lib(filename, newfilename))
 175                                 filename = newfilename;
 176                 }
 177
 178                 if (vdso) {
 179                         pgoff = 0;
 180                         dso = machine__findnew_vdso(machine, thread);
 181                 } else
 182                         dso = machine__findnew_dso(machine, filename);
 183
 184                 if (dso == NULL)
 185                         goto out_delete;
 186
 187                 map__init(map, type, start, start + len, pgoff, dso);
 188
 189                 if (anon || no_dso) {
 190                         map->map_ip = map->unmap_ip = identity__map_ip;
 191
 192                         /*
 193                          * Set memory without DSO as loaded. All map__find_*
 194                          * functions still return NULL, and we avoid the
 195                          * unnecessary map__load warning.
 196                          */
 197                         if (type != MAP__FUNCTION)
 198                                 dso__set_loaded(dso, map->type);
 199                 }
 200                 dso__put(dso);
 201         }
 202         return map;
 203 out_delete:
 204         free(map);
 205         return NULL;
 206 }
 207
 208 /*
 209  * Constructor variant for modules (where we know from /proc/modules where
 210  * they are loaded) and for vmlinux, where only after we load all the
 211  * symbols we'll know where it starts and ends.
 212  */
 213 struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
 214 {
 215         struct map *map = calloc(1, (sizeof(*map) +
 216                                      (dso->kernel ? sizeof(struct kmap) : 0)));
 217         if (map != NULL) {
 218                 /*
 219                  * ->end will be filled after we load all the symbols
 220                  */
 221                 map__init(map, type, start, 0, 0, dso);
 222         }
 223
 224         return map;
 225 }
 226
 227 /*
 228  * Use this and __map__is_kmodule() for map instances that are in
 229  * machine->kmaps, and thus have map->groups->machine all properly set, to
 230  * disambiguate between the kernel and modules.
 231  *
 232  * When the need arises, introduce map__is_{kernel,kmodule)() that
 233  * checks (map->groups != NULL && map->groups->machine != NULL &&
 234  * map->dso->kernel) before calling __map__is_{kernel,kmodule}())
 235  */
 236 bool __map__is_kernel(const struct map *map)
 237 {
 238         return __machine__kernel_map(map->groups->machine, map->type) == map;
 239 }
 240
 241 static void map__exit(struct map *map)
 242 {
 243         BUG_ON(!RB_EMPTY_NODE(&map->rb_node));
 244         dso__zput(map->dso);
 245 }
 246
 247 void map__delete(struct map *map)
 248 {
 249         map__exit(map);
 250         free(map);
 251 }
 252
 253 void map__put(struct map *map)
 254 {
 255         if (map && atomic_dec_and_test(&map->refcnt))
 256                 map__delete(map);
 257 }
 258
 259 void map__fixup_start(struct map *map)
 260 {
 261         struct rb_root *symbols = &map->dso->symbols[map->type];
 262         struct rb_node *nd = rb_first(symbols);
 263         if (nd != NULL) {
 264                 struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
 265                 map->start = sym->start;
 266         }
 267 }
 268
 269 void map__fixup_end(struct map *map)
 270 {
 271         struct rb_root *symbols = &map->dso->symbols[map->type];
 272         struct rb_node *nd = rb_last(symbols);
 273         if (nd != NULL) {
 274                 struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
 275                 map->end = sym->end;
 276         }
 277 }
 278
 279 #define DSO__DELETED "(deleted)"
 280
 281 int map__load(struct map *map, symbol_filter_t filter)
 282 {
 283         const char *name = map->dso->long_name;
 284         int nr;
 285
 286         if (dso__loaded(map->dso, map->type))
 287                 return 0;
 288
 289         nr = dso__load(map->dso, map, filter);
 290         if (nr < 0) {
 291                 if (map->dso->has_build_id) {
 292                         char sbuild_id[BUILD_ID_SIZE * 2 + 1];
 293
 294                         build_id__sprintf(map->dso->build_id,
 295                                           sizeof(map->dso->build_id),
 296                                           sbuild_id);
 297                         pr_warning("%s with build id %s not found",
 298                                    name, sbuild_id);
 299                 } else
 300                         pr_warning("Failed to open %s", name);
 301
 302                 pr_warning(", continuing without symbols\n");
 303                 return -1;
 304         } else if (nr == 0) {
 305 #ifdef HAVE_LIBELF_SUPPORT
 306                 const size_t len = strlen(name);
 307                 const size_t real_len = len - sizeof(DSO__DELETED);
 308
 309                 if (len > sizeof(DSO__DELETED) &&
 310                     strcmp(name + real_len + 1, DSO__DELETED) == 0) {
 311                         pr_warning("%.*s was updated (is prelink enabled?). "
 312                                 "Restart the long running apps that use it!\n",
 313                                    (int)real_len, name);
 314                 } else {
 315                         pr_warning("no symbols found in %s, maybe install "
 316                                    "a debug package?\n", name);
 317                 }
 318 #endif
 319                 return -1;
 320         }
 321
 322         return 0;
 323 }
 324
 325 int __weak arch__compare_symbol_names(const char *namea, const char *nameb)
 326 {
 327         return strcmp(namea, nameb);
 328 }
 329
 330 struct symbol *map__find_symbol(struct map *map, u64 addr,
 331                                 symbol_filter_t filter)
 332 {
 333         if (map__load(map, filter) < 0)
 334                 return NULL;
 335
 336         return dso__find_symbol(map->dso, map->type, addr);
 337 }
 338
 339 struct symbol *map__find_symbol_by_name(struct map *map, const char *name,
 340                                         symbol_filter_t filter)
 341 {
 342         if (map__load(map, filter) < 0)
 343                 return NULL;
 344
 345         if (!dso__sorted_by_name(map->dso, map->type))
 346                 dso__sort_by_name(map->dso, map->type);
 347
 348         return dso__find_symbol_by_name(map->dso, map->type, name);
 349 }
 350
 351 struct map *map__clone(struct map *from)
 352 {
 353         struct map *map = memdup(from, sizeof(*map));
 354
 355         if (map != NULL) {
 356                 atomic_set(&map->refcnt, 1);
 357                 RB_CLEAR_NODE(&map->rb_node);
 358                 dso__get(map->dso);
 359                 map->groups = NULL;
 360         }
 361
 362         return map;
 363 }
 364
 365 int map__overlap(struct map *l, struct map *r)
 366 {
 367         if (l->start > r->start) {
 368                 struct map *t = l;
 369                 l = r;
 370                 r = t;
 371         }
 372
 373         if (l->end > r->start)
 374                 return 1;
 375
 376         return 0;
 377 }
 378
 379 size_t map__fprintf(struct map *map, FILE *fp)
 380 {
 381         return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s\n",
 382                        map->start, map->end, map->pgoff, map->dso->name);
 383 }
 384
 385 size_t map__fprintf_dsoname(struct map *map, FILE *fp)
 386 {
 387         const char *dsoname = "[unknown]";
 388
 389         if (map && map->dso && (map->dso->name || map->dso->long_name)) {
 390                 if (symbol_conf.show_kernel_path && map->dso->long_name)
 391                         dsoname = map->dso->long_name;
 392                 else if (map->dso->name)
 393                         dsoname = map->dso->name;
 394         }
 395
 396         return fprintf(fp, "%s", dsoname);
 397 }
 398
 399 int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
 400                          FILE *fp)
 401 {
 402         char *srcline;
 403         int ret = 0;
 404
 405         if (map && map->dso) {
 406                 srcline = get_srcline(map->dso,
 407                                       map__rip_2objdump(map, addr), NULL, true);
 408                 if (srcline != SRCLINE_UNKNOWN)
 409                         ret = fprintf(fp, "%s%s", prefix, srcline);
 410                 free_srcline(srcline);
 411         }
 412         return ret;
 413 }
 414
 415 /**
 416  * map__rip_2objdump - convert symbol start address to objdump address.
 417  * @map: memory map
 418  * @rip: symbol start address
 419  *
 420  * objdump wants/reports absolute IPs for ET_EXEC, and RIPs for ET_DYN.
 421  * map->dso->adjust_symbols==1 for ET_EXEC-like cases except ET_REL which is
 422  * relative to section start.
 423  *
 424  * Return: Address suitable for passing to "objdump --start-address="
 425  */
 426 u64 map__rip_2objdump(struct map *map, u64 rip)
 427 {
 428         if (!map->dso->adjust_symbols)
 429                 return rip;
 430
 431         if (map->dso->rel)
 432                 return rip - map->pgoff;
 433
 434         return map->unmap_ip(map, rip) - map->reloc;
 435 }
 436
 437 /**
 438  * map__objdump_2mem - convert objdump address to a memory address.
 439  * @map: memory map
 440  * @ip: objdump address
 441  *
 442  * Closely related to map__rip_2objdump(), this function takes an address from
 443  * objdump and converts it to a memory address.  Note this assumes that @map
 444  * contains the address.  To be sure the result is valid, check it forwards
 445  * e.g. map__rip_2objdump(map->map_ip(map, map__objdump_2mem(map, ip))) == ip
 446  *
 447  * Return: Memory address.
 448  */
 449 u64 map__objdump_2mem(struct map *map, u64 ip)
 450 {
 451         if (!map->dso->adjust_symbols)
 452                 return map->unmap_ip(map, ip);
 453
 454         if (map->dso->rel)
 455                 return map->unmap_ip(map, ip + map->pgoff);
 456
 457         return ip + map->reloc;
 458 }
 459
 460 static void maps__init(struct maps *maps)
 461 {
 462         maps->entries = RB_ROOT;
 463         pthread_rwlock_init(&maps->lock, NULL);
 464 }
 465
 466 void map_groups__init(struct map_groups *mg, struct machine *machine)
 467 {
 468         int i;
 469         for (i = 0; i < MAP__NR_TYPES; ++i) {
 470                 maps__init(&mg->maps[i]);
 471         }
 472         mg->machine = machine;
 473         atomic_set(&mg->refcnt, 1);
 474 }
 475
 476 static void __maps__purge(struct maps *maps)
 477 {
 478         struct rb_root *root = &maps->entries;
 479         struct rb_node *next = rb_first(root);
 480
 481         while (next) {
 482                 struct map *pos = rb_entry(next, struct map, rb_node);
 483
 484                 next = rb_next(&pos->rb_node);
 485                 rb_erase_init(&pos->rb_node, root);
 486                 map__put(pos);
 487         }
 488 }
 489
 490 static void maps__exit(struct maps *maps)
 491 {
 492         pthread_rwlock_wrlock(&maps->lock);
 493         __maps__purge(maps);
 494         pthread_rwlock_unlock(&maps->lock);
 495 }
 496
 497 void map_groups__exit(struct map_groups *mg)
 498 {
 499         int i;
 500
 501         for (i = 0; i < MAP__NR_TYPES; ++i)
 502                 maps__exit(&mg->maps[i]);
 503 }
 504
 505 bool map_groups__empty(struct map_groups *mg)
 506 {
 507         int i;
 508
 509         for (i = 0; i < MAP__NR_TYPES; ++i) {
 510                 if (maps__first(&mg->maps[i]))
 511                         return false;
 512         }
 513
 514         return true;
 515 }
 516
 517 struct map_groups *map_groups__new(struct machine *machine)
 518 {
 519         struct map_groups *mg = malloc(sizeof(*mg));
 520
 521         if (mg != NULL)
 522                 map_groups__init(mg, machine);
 523
 524         return mg;
 525 }
 526
 527 void map_groups__delete(struct map_groups *mg)
 528 {
 529         map_groups__exit(mg);
 530         free(mg);
 531 }
 532
 533 void map_groups__put(struct map_groups *mg)
 534 {
 535         if (mg && atomic_dec_and_test(&mg->refcnt))
 536                 map_groups__delete(mg);
 537 }
 538
 539 struct symbol *map_groups__find_symbol(struct map_groups *mg,
 540                                        enum map_type type, u64 addr,
 541                                        struct map **mapp,
 542                                        symbol_filter_t filter)
 543 {
 544         struct map *map = map_groups__find(mg, type, addr);
 545
 546         /* Ensure map is loaded before using map->map_ip */
 547         if (map != NULL && map__load(map, filter) >= 0) {
 548                 if (mapp != NULL)
 549                         *mapp = map;
 550                 return map__find_symbol(map, map->map_ip(map, addr), filter);
 551         }
 552
 553         return NULL;
 554 }
 555
 556 struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name,
 557                                          struct map **mapp, symbol_filter_t filter)
 558 {
 559         struct symbol *sym;
 560         struct rb_node *nd;
 561
 562         pthread_rwlock_rdlock(&maps->lock);
 563
 564         for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
 565                 struct map *pos = rb_entry(nd, struct map, rb_node);
 566
 567                 sym = map__find_symbol_by_name(pos, name, filter);
 568
 569                 if (sym == NULL)
 570                         continue;
 571                 if (mapp != NULL)
 572                         *mapp = pos;
 573                 goto out;
 574         }
 575
 576         sym = NULL;
 577 out:
 578         pthread_rwlock_unlock(&maps->lock);
 579         return sym;
 580 }
 581
 582 struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg,
 583                                                enum map_type type,
 584                                                const char *name,
 585                                                struct map **mapp,
 586                                                symbol_filter_t filter)
 587 {
 588         struct symbol *sym = maps__find_symbol_by_name(&mg->maps[type], name, mapp, filter);
 589
 590         return sym;
 591 }
 592
 593 int map_groups__find_ams(struct addr_map_symbol *ams, symbol_filter_t filter)
 594 {
 595         if (ams->addr < ams->map->start || ams->addr >= ams->map->end) {
 596                 if (ams->map->groups == NULL)
 597                         return -1;
 598                 ams->map = map_groups__find(ams->map->groups, ams->map->type,
 599                                             ams->addr);
 600                 if (ams->map == NULL)
 601                         return -1;
 602         }
 603
 604         ams->al_addr = ams->map->map_ip(ams->map, ams->addr);
 605         ams->sym = map__find_symbol(ams->map, ams->al_addr, filter);
 606
 607         return ams->sym ? 0 : -1;
 608 }
 609
 610 static size_t maps__fprintf(struct maps *maps, FILE *fp)
 611 {
 612         size_t printed = 0;
 613         struct rb_node *nd;
 614
 615         pthread_rwlock_rdlock(&maps->lock);
 616
 617         for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
 618                 struct map *pos = rb_entry(nd, struct map, rb_node);
 619                 printed += fprintf(fp, "Map:");
 620                 printed += map__fprintf(pos, fp);
 621                 if (verbose > 2) {
 622                         printed += dso__fprintf(pos->dso, pos->type, fp);
 623                         printed += fprintf(fp, "--\n");
 624                 }
 625         }
 626
 627         pthread_rwlock_unlock(&maps->lock);
 628
 629         return printed;
 630 }
 631
 632 size_t __map_groups__fprintf_maps(struct map_groups *mg, enum map_type type,
 633                                   FILE *fp)
 634 {
 635         size_t printed = fprintf(fp, "%s:\n", map_type__name[type]);
 636         return printed += maps__fprintf(&mg->maps[type], fp);
 637 }
 638
 639 size_t map_groups__fprintf(struct map_groups *mg, FILE *fp)
 640 {
 641         size_t printed = 0, i;
 642         for (i = 0; i < MAP__NR_TYPES; ++i)
 643                 printed += __map_groups__fprintf_maps(mg, i, fp);
 644         return printed;
 645 }
 646
 647 static void __map_groups__insert(struct map_groups *mg, struct map *map)
 648 {
 649         __maps__insert(&mg->maps[map->type], map);
 650         map->groups = mg;
 651 }
 652
 653 static int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp)
 654 {
 655         struct rb_root *root;
 656         struct rb_node *next;
 657         int err = 0;
 658
 659         pthread_rwlock_wrlock(&maps->lock);
 660
 661         root = &maps->entries;
 662         next = rb_first(root);
 663
 664         while (next) {
 665                 struct map *pos = rb_entry(next, struct map, rb_node);
 666                 next = rb_next(&pos->rb_node);
 667
 668                 if (!map__overlap(pos, map))
 669                         continue;
 670
 671                 if (verbose >= 2) {
 672                         fputs("overlapping maps:\n", fp);
 673                         map__fprintf(map, fp);
 674                         map__fprintf(pos, fp);
 675                 }
 676
 677                 rb_erase_init(&pos->rb_node, root);
 678                 /*
 679                  * Now check if we need to create new maps for areas not
 680                  * overlapped by the new map:
 681                  */
 682                 if (map->start > pos->start) {
 683                         struct map *before = map__clone(pos);
 684
 685                         if (before == NULL) {
 686                                 err = -ENOMEM;
 687                                 goto put_map;
 688                         }
 689
 690                         before->end = map->start;
 691                         __map_groups__insert(pos->groups, before);
 692                         if (verbose >= 2)
 693                                 map__fprintf(before, fp);
 694                 }
 695
 696                 if (map->end < pos->end) {
 697                         struct map *after = map__clone(pos);
 698
 699                         if (after == NULL) {
 700                                 err = -ENOMEM;
 701                                 goto put_map;
 702                         }
 703
 704                         after->start = map->end;
 705                         __map_groups__insert(pos->groups, after);
 706                         if (verbose >= 2)
 707                                 map__fprintf(after, fp);
 708                 }
 709 put_map:
 710                 map__put(pos);
 711
 712                 if (err)
 713                         goto out;
 714         }
 715
 716         err = 0;
 717 out:
 718         pthread_rwlock_unlock(&maps->lock);
 719         return err;
 720 }
 721
 722 int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map,
 723                                    FILE *fp)
 724 {
 725         return maps__fixup_overlappings(&mg->maps[map->type], map, fp);
 726 }
 727
 728 /*
 729  * XXX This should not really _copy_ te maps, but refcount them.
 730  */
 731 int map_groups__clone(struct map_groups *mg,
 732                       struct map_groups *parent, enum map_type type)
 733 {
 734         int err = -ENOMEM;
 735         struct map *map;
 736         struct maps *maps = &parent->maps[type];
 737
 738         pthread_rwlock_rdlock(&maps->lock);
 739
 740         for (map = maps__first(maps); map; map = map__next(map)) {
 741                 struct map *new = map__clone(map);
 742                 if (new == NULL)
 743                         goto out_unlock;
 744                 map_groups__insert(mg, new);
 745         }
 746
 747         err = 0;
 748 out_unlock:
 749         pthread_rwlock_unlock(&maps->lock);
 750         return err;
 751 }
 752
 753 static void __maps__insert(struct maps *maps, struct map *map)
 754 {
 755         struct rb_node **p = &maps->entries.rb_node;
 756         struct rb_node *parent = NULL;
 757         const u64 ip = map->start;
 758         struct map *m;
 759
 760         while (*p != NULL) {
 761                 parent = *p;
 762                 m = rb_entry(parent, struct map, rb_node);
 763                 if (ip < m->start)
 764                         p = &(*p)->rb_left;
 765                 else
 766                         p = &(*p)->rb_right;
 767         }
 768
 769         rb_link_node(&map->rb_node, parent, p);
 770         rb_insert_color(&map->rb_node, &maps->entries);
 771         map__get(map);
 772 }
 773
 774 void maps__insert(struct maps *maps, struct map *map)
 775 {
 776         pthread_rwlock_wrlock(&maps->lock);
 777         __maps__insert(maps, map);
 778         pthread_rwlock_unlock(&maps->lock);
 779 }
 780
 781 static void __maps__remove(struct maps *maps, struct map *map)
 782 {
 783         rb_erase_init(&map->rb_node, &maps->entries);
 784         map__put(map);
 785 }
 786
 787 void maps__remove(struct maps *maps, struct map *map)
 788 {
 789         pthread_rwlock_wrlock(&maps->lock);
 790         __maps__remove(maps, map);
 791         pthread_rwlock_unlock(&maps->lock);
 792 }
 793
 794 struct map *maps__find(struct maps *maps, u64 ip)
 795 {
 796         struct rb_node **p, *parent = NULL;
 797         struct map *m;
 798
 799         pthread_rwlock_rdlock(&maps->lock);
 800
 801         p = &maps->entries.rb_node;
 802         while (*p != NULL) {
 803                 parent = *p;
 804                 m = rb_entry(parent, struct map, rb_node);
 805                 if (ip < m->start)
 806                         p = &(*p)->rb_left;
 807                 else if (ip >= m->end)
 808                         p = &(*p)->rb_right;
 809                 else
 810                         goto out;
 811         }
 812
 813         m = NULL;
 814 out:
 815         pthread_rwlock_unlock(&maps->lock);
 816         return m;
 817 }
 818
 819 struct map *maps__first(struct maps *maps)
 820 {
 821         struct rb_node *first = rb_first(&maps->entries);
 822
 823         if (first)
 824                 return rb_entry(first, struct map, rb_node);
 825         return NULL;
 826 }
 827
 828 struct map *map__next(struct map *map)
 829 {
 830         struct rb_node *next = rb_next(&map->rb_node);
 831
 832         if (next)
 833                 return rb_entry(next, struct map, rb_node);
 834         return NULL;
 835 }
 836
 837 struct kmap *map__kmap(struct map *map)
 838 {
 839         if (!map->dso || !map->dso->kernel) {
 840                 pr_err("Internal error: map__kmap with a non-kernel map\n");
 841                 return NULL;
 842         }
 843         return (struct kmap *)(map + 1);
 844 }
 845
 846 struct map_groups *map__kmaps(struct map *map)
 847 {
 848         struct kmap *kmap = map__kmap(map);
 849
 850         if (!kmap || !kmap->kmaps) {
 851                 pr_err("Internal error: map__kmaps with a non-kernel map\n");
 852                 return NULL;
 853         }
 854         return kmap->kmaps;
 855 }