tools/perf/util/dso.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __PERF_DSO
   3 #define __PERF_DSO
   4
   5 #include <linux/refcount.h>
   6 #include <linux/types.h>
   7 #include <linux/rbtree.h>
   8 #include <sys/types.h>
   9 #include <stdbool.h>
  10 #include "rwsem.h"
  11 #include <linux/types.h>
  12 #include <linux/bitops.h>
  13 #include "map.h"
  14 #include "namespaces.h"
  15 #include "build-id.h"
  16
  17 enum dso_binary_type {
  18         DSO_BINARY_TYPE__KALLSYMS = 0,
  19         DSO_BINARY_TYPE__GUEST_KALLSYMS,
  20         DSO_BINARY_TYPE__VMLINUX,
  21         DSO_BINARY_TYPE__GUEST_VMLINUX,
  22         DSO_BINARY_TYPE__JAVA_JIT,
  23         DSO_BINARY_TYPE__DEBUGLINK,
  24         DSO_BINARY_TYPE__BUILD_ID_CACHE,
  25         DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO,
  26         DSO_BINARY_TYPE__FEDORA_DEBUGINFO,
  27         DSO_BINARY_TYPE__UBUNTU_DEBUGINFO,
  28         DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO,
  29         DSO_BINARY_TYPE__BUILDID_DEBUGINFO,
  30         DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
  31         DSO_BINARY_TYPE__GUEST_KMODULE,
  32         DSO_BINARY_TYPE__GUEST_KMODULE_COMP,
  33         DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE,
  34         DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP,
  35         DSO_BINARY_TYPE__KCORE,
  36         DSO_BINARY_TYPE__GUEST_KCORE,
  37         DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO,
  38         DSO_BINARY_TYPE__NOT_FOUND,
  39 };
  40
  41 enum dso_kernel_type {
  42         DSO_TYPE_USER = 0,
  43         DSO_TYPE_KERNEL,
  44         DSO_TYPE_GUEST_KERNEL
  45 };
  46
  47 enum dso_swap_type {
  48         DSO_SWAP__UNSET,
  49         DSO_SWAP__NO,
  50         DSO_SWAP__YES,
  51 };
  52
  53 enum dso_data_status {
  54         DSO_DATA_STATUS_ERROR   = -1,
  55         DSO_DATA_STATUS_UNKNOWN = 0,
  56         DSO_DATA_STATUS_OK      = 1,
  57 };
  58
  59 enum dso_data_status_seen {
  60         DSO_DATA_STATUS_SEEN_ITRACE,
  61 };
  62
  63 enum dso_type {
  64         DSO__TYPE_UNKNOWN,
  65         DSO__TYPE_64BIT,
  66         DSO__TYPE_32BIT,
  67         DSO__TYPE_X32BIT,
  68 };
  69
  70 enum dso_load_errno {
  71         DSO_LOAD_ERRNO__SUCCESS         = 0,
  72
  73         /*
  74          * Choose an arbitrary negative big number not to clash with standard
  75          * errno since SUS requires the errno has distinct positive values.
  76          * See 'Issue 6' in the link below.
  77          *
  78          * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
  79          */
  80         __DSO_LOAD_ERRNO__START         = -10000,
  81
  82         DSO_LOAD_ERRNO__INTERNAL_ERROR  = __DSO_LOAD_ERRNO__START,
  83
  84         /* for symsrc__init() */
  85         DSO_LOAD_ERRNO__INVALID_ELF,
  86         DSO_LOAD_ERRNO__CANNOT_READ_BUILDID,
  87         DSO_LOAD_ERRNO__MISMATCHING_BUILDID,
  88
  89         /* for decompress_kmodule */
  90         DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE,
  91
  92         __DSO_LOAD_ERRNO__END,
  93 };
  94
  95 #define DSO__SWAP(dso, type, val)                       \
  96 ({                                                      \
  97         type ____r = val;                               \
  98         BUG_ON(dso->needs_swap == DSO_SWAP__UNSET);     \
  99         if (dso->needs_swap == DSO_SWAP__YES) {         \
 100                 switch (sizeof(____r)) {                \
 101                 case 2:                                 \
 102                         ____r = bswap_16(val);          \
 103                         break;                          \
 104                 case 4:                                 \
 105                         ____r = bswap_32(val);          \
 106                         break;                          \
 107                 case 8:                                 \
 108                         ____r = bswap_64(val);          \
 109                         break;                          \
 110                 default:                                \
 111                         BUG_ON(1);                      \
 112                 }                                       \
 113         }                                               \
 114         ____r;                                          \
 115 })
 116
 117 #define DSO__DATA_CACHE_SIZE 4096
 118 #define DSO__DATA_CACHE_MASK ~(DSO__DATA_CACHE_SIZE - 1)
 119
 120 struct dso_cache {
 121         struct rb_node  rb_node;
 122         u64 offset;
 123         u64 size;
 124         char data[0];
 125 };
 126
 127 /*
 128  * DSOs are put into both a list for fast iteration and rbtree for fast
 129  * long name lookup.
 130  */
 131 struct dsos {
 132         struct list_head head;
 133         struct rb_root   root;  /* rbtree root sorted by long name */
 134         struct rw_semaphore lock;
 135 };
 136
 137 struct auxtrace_cache;
 138
 139 struct dso {
 140         pthread_mutex_t  lock;
 141         struct list_head node;
 142         struct rb_node   rb_node;       /* rbtree node sorted by long name */
 143         struct rb_root   *root;         /* root of rbtree that rb_node is in */
 144         struct rb_root   symbols;
 145         struct rb_root   symbol_names;
 146         struct rb_root   inlined_nodes;
 147         struct rb_root   srclines;
 148         struct {
 149                 u64             addr;
 150                 struct symbol   *symbol;
 151         } last_find_result;
 152         void             *a2l;
 153         char             *symsrc_filename;
 154         unsigned int     a2l_fails;
 155         enum dso_kernel_type    kernel;
 156         enum dso_swap_type      needs_swap;
 157         enum dso_binary_type    symtab_type;
 158         enum dso_binary_type    binary_type;
 159         enum dso_load_errno     load_errno;
 160         u8               adjust_symbols:1;
 161         u8               has_build_id:1;
 162         u8               has_srcline:1;
 163         u8               hit:1;
 164         u8               annotate_warned:1;
 165         u8               short_name_allocated:1;
 166         u8               long_name_allocated:1;
 167         u8               is_64_bit:1;
 168         bool             sorted_by_name;
 169         bool             loaded;
 170         u8               rel;
 171         u8               build_id[BUILD_ID_SIZE];
 172         u64              text_offset;
 173         const char       *short_name;
 174         const char       *long_name;
 175         u16              long_name_len;
 176         u16              short_name_len;
 177         void            *dwfl;                  /* DWARF debug info */
 178         struct auxtrace_cache *auxtrace_cache;
 179         int              comp;
 180
 181         /* dso data file */
 182         struct {
 183                 struct rb_root   cache;
 184                 int              fd;
 185                 int              status;
 186                 u32              status_seen;
 187                 size_t           file_size;
 188                 struct list_head open_entry;
 189                 u64              debug_frame_offset;
 190                 u64              eh_frame_hdr_offset;
 191         } data;
 192
 193         union { /* Tool specific area */
 194                 void     *priv;
 195                 u64      db_id;
 196         };
 197         struct nsinfo   *nsinfo;
 198         refcount_t       refcnt;
 199         char             name[0];
 200 };
 201
 202 /* dso__for_each_symbol - iterate over the symbols of given type
 203  *
 204  * @dso: the 'struct dso *' in which symbols itereated
 205  * @pos: the 'struct symbol *' to use as a loop cursor
 206  * @n: the 'struct rb_node *' to use as a temporary storage
 207  */
 208 #define dso__for_each_symbol(dso, pos, n)       \
 209         symbols__for_each_entry(&(dso)->symbols, pos, n)
 210
 211 static inline void dso__set_loaded(struct dso *dso)
 212 {
 213         dso->loaded = true;
 214 }
 215
 216 struct dso *dso__new(const char *name);
 217 void dso__delete(struct dso *dso);
 218
 219 void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated);
 220 void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated);
 221
 222 int dso__name_len(const struct dso *dso);
 223
 224 struct dso *dso__get(struct dso *dso);
 225 void dso__put(struct dso *dso);
 226
 227 static inline void __dso__zput(struct dso **dso)
 228 {
 229         dso__put(*dso);
 230         *dso = NULL;
 231 }
 232
 233 #define dso__zput(dso) __dso__zput(&dso)
 234
 235 bool dso__loaded(const struct dso *dso);
 236
 237 static inline bool dso__has_symbols(const struct dso *dso)
 238 {
 239         return !RB_EMPTY_ROOT(&dso->symbols);
 240 }
 241
 242 bool dso__sorted_by_name(const struct dso *dso);
 243 void dso__set_sorted_by_name(struct dso *dso);
 244 void dso__sort_by_name(struct dso *dso);
 245
 246 void dso__set_build_id(struct dso *dso, void *build_id);
 247 bool dso__build_id_equal(const struct dso *dso, u8 *build_id);
 248 void dso__read_running_kernel_build_id(struct dso *dso,
 249                                        struct machine *machine);
 250 int dso__kernel_module_get_build_id(struct dso *dso, const char *root_dir);
 251
 252 char dso__symtab_origin(const struct dso *dso);
 253 int dso__read_binary_type_filename(const struct dso *dso, enum dso_binary_type type,
 254                                    char *root_dir, char *filename, size_t size);
 255 bool is_kernel_module(const char *pathname, int cpumode);
 256 bool dso__needs_decompress(struct dso *dso);
 257 int dso__decompress_kmodule_fd(struct dso *dso, const char *name);
 258 int dso__decompress_kmodule_path(struct dso *dso, const char *name,
 259                                  char *pathname, size_t len);
 260
 261 #define KMOD_DECOMP_NAME  "/tmp/perf-kmod-XXXXXX"
 262 #define KMOD_DECOMP_LEN   sizeof(KMOD_DECOMP_NAME)
 263
 264 struct kmod_path {
 265         char *name;
 266         int   comp;
 267         bool  kmod;
 268 };
 269
 270 int __kmod_path__parse(struct kmod_path *m, const char *path,
 271                      bool alloc_name);
 272
 273 #define kmod_path__parse(__m, __p)      __kmod_path__parse(__m, __p, false)
 274 #define kmod_path__parse_name(__m, __p) __kmod_path__parse(__m, __p, true)
 275
 276 void dso__set_module_info(struct dso *dso, struct kmod_path *m,
 277                           struct machine *machine);
 278
 279 /*
 280  * The dso__data_* external interface provides following functions:
 281  *   dso__data_get_fd
 282  *   dso__data_put_fd
 283  *   dso__data_close
 284  *   dso__data_size
 285  *   dso__data_read_offset
 286  *   dso__data_read_addr
 287  *
 288  * Please refer to the dso.c object code for each function and
 289  * arguments documentation. Following text tries to explain the
 290  * dso file descriptor caching.
 291  *
 292  * The dso__data* interface allows caching of opened file descriptors
 293  * to speed up the dso data accesses. The idea is to leave the file
 294  * descriptor opened ideally for the whole life of the dso object.
 295  *
 296  * The current usage of the dso__data_* interface is as follows:
 297  *
 298  * Get DSO's fd:
 299  *   int fd = dso__data_get_fd(dso, machine);
 300  *   if (fd >= 0) {
 301  *       USE 'fd' SOMEHOW
 302  *       dso__data_put_fd(dso);
 303  *   }
 304  *
 305  * Read DSO's data:
 306  *   n = dso__data_read_offset(dso_0, &machine, 0, buf, BUFSIZE);
 307  *   n = dso__data_read_addr(dso_0, &machine, 0, buf, BUFSIZE);
 308  *
 309  * Eventually close DSO's fd:
 310  *   dso__data_close(dso);
 311  *
 312  * It is not necessary to close the DSO object data file. Each time new
 313  * DSO data file is opened, the limit (RLIMIT_NOFILE/2) is checked. Once
 314  * it is crossed, the oldest opened DSO object is closed.
 315  *
 316  * The dso__delete function calls close_dso function to ensure the
 317  * data file descriptor gets closed/unmapped before the dso object
 318  * is freed.
 319  *
 320  * TODO
 321 */
 322 int dso__data_get_fd(struct dso *dso, struct machine *machine);
 323 void dso__data_put_fd(struct dso *dso);
 324 void dso__data_close(struct dso *dso);
 325
 326 off_t dso__data_size(struct dso *dso, struct machine *machine);
 327 ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
 328                               u64 offset, u8 *data, ssize_t size);
 329 ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
 330                             struct machine *machine, u64 addr,
 331                             u8 *data, ssize_t size);
 332 bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by);
 333
 334 struct map *dso__new_map(const char *name);
 335 struct dso *machine__findnew_kernel(struct machine *machine, const char *name,
 336                                     const char *short_name, int dso_type);
 337
 338 void __dsos__add(struct dsos *dsos, struct dso *dso);
 339 void dsos__add(struct dsos *dsos, struct dso *dso);
 340 struct dso *__dsos__addnew(struct dsos *dsos, const char *name);
 341 struct dso *__dsos__find(struct dsos *dsos, const char *name, bool cmp_short);
 342 struct dso *dsos__find(struct dsos *dsos, const char *name, bool cmp_short);
 343 struct dso *__dsos__findnew(struct dsos *dsos, const char *name);
 344 struct dso *dsos__findnew(struct dsos *dsos, const char *name);
 345 bool __dsos__read_build_ids(struct list_head *head, bool with_hits);
 346
 347 void dso__reset_find_symbol_cache(struct dso *dso);
 348
 349 size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
 350                                bool (skip)(struct dso *dso, int parm), int parm);
 351 size_t __dsos__fprintf(struct list_head *head, FILE *fp);
 352
 353 size_t dso__fprintf_buildid(struct dso *dso, FILE *fp);
 354 size_t dso__fprintf_symbols_by_name(struct dso *dso, FILE *fp);
 355 size_t dso__fprintf(struct dso *dso, FILE *fp);
 356
 357 static inline bool dso__is_vmlinux(struct dso *dso)
 358 {
 359         return dso->binary_type == DSO_BINARY_TYPE__VMLINUX ||
 360                dso->binary_type == DSO_BINARY_TYPE__GUEST_VMLINUX;
 361 }
 362
 363 static inline bool dso__is_kcore(struct dso *dso)
 364 {
 365         return dso->binary_type == DSO_BINARY_TYPE__KCORE ||
 366                dso->binary_type == DSO_BINARY_TYPE__GUEST_KCORE;
 367 }
 368
 369 static inline bool dso__is_kallsyms(struct dso *dso)
 370 {
 371         return dso->kernel && dso->long_name[0] != '/';
 372 }
 373
 374 void dso__free_a2l(struct dso *dso);
 375
 376 enum dso_type dso__type(struct dso *dso, struct machine *machine);
 377
 378 int dso__strerror_load(struct dso *dso, char *buf, size_t buflen);
 379
 380 void reset_fd_limit(void);
 381
 382 #endif /* __PERF_DSO */