gdb/ctfread.c

   1 /* Compact ANSI-C Type Format (CTF) support in GDB.
   2
   3    Copyright (C) 2019-2021 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 /* This file format can be used to compactly represent the information needed
  21    by a debugger to interpret the ANSI-C types used by a given program.
  22    Traditionally, this kind of information is generated by the compiler when
  23    invoked with the -g flag and is stored in "stabs" strings or in the more
  24    modern DWARF format. A new -gtLEVEL option has been added in gcc to generate
  25    such information. CTF provides a representation of only the information
  26    that is relevant to debugging a complex, optimized C program such as the
  27    operating system kernel in a form that is significantly more compact than
  28    the equivalent stabs or DWARF representation.  The format is data-model
  29    independent, so consumers do not need different code depending on whether
  30    they are 32-bit or 64-bit programs.  CTF assumes that a standard ELF symbol
  31    table is available for use in the debugger, and uses the structure and data
  32    of the symbol table to avoid storing redundant information.  The CTF data
  33    may be compressed on disk or in memory, indicated by a bit in the header.
  34    CTF may be interpreted in a raw disk file, or it may be stored in an ELF
  35    section, typically named .ctf.  Data structures are aligned so that a raw
  36    CTF file or CTF ELF section may be manipulated using mmap(2).
  37
  38    The CTF file or section itself has the following structure:
  39
  40    +--------+--------+---------+----------+----------+-------+--------+
  41    |  file  |  type  |  data   | function | variable | data  | string |
  42    | header | labels | objects |   info   |   info   | types | table  |
  43    +--------+--------+---------+----------+----------+-------+--------+
  44
  45    The file header stores a magic number and version information, encoding
  46    flags, and the byte offset of each of the sections relative to the end of the
  47    header itself.  If the CTF data has been uniquified against another set of
  48    CTF data, a reference to that data also appears in the header.  This
  49    reference is the name of the label corresponding to the types uniquified
  50    against.
  51
  52    Following the header is a list of labels, used to group the types included in
  53    the data types section.  Each label is accompanied by a type ID i.  A given
  54    label refers to the group of types whose IDs are in the range [0, i].
  55
  56    Data object and function records are stored in the same order as they appear
  57    in the corresponding symbol table, except that symbols marked SHN_UNDEF are
  58    not stored and symbols that have no type data are padded out with zeroes.
  59    For each data object, the type ID (a small integer) is recorded.  For each
  60    function, the type ID of the return type and argument types is recorded.
  61
  62    Variable records (as distinct from data objects) provide a modicum of support
  63    for non-ELF systems, mapping a variable name to a CTF type ID.  The variable
  64    names are sorted into ASCIIbetical order, permitting binary searching.
  65
  66    The data types section is a list of variable size records that represent each
  67    type, in order by their ID.  The types themselves form a directed graph,
  68    where each node may contain one or more outgoing edges to other type nodes,
  69    denoted by their ID.
  70
  71    Strings are recorded as a string table ID (0 or 1) and a byte offset into the
  72    string table.  String table 0 is the internal CTF string table.  String table
  73    1 is the external string table, which is the string table associated with the
  74    ELF symbol table for this object.  CTF does not record any strings that are
  75    already in the symbol table, and the CTF string table does not contain any
  76    duplicated strings.  */
  77
  78 #include "defs.h"
  79 #include "buildsym.h"
  80 #include "complaints.h"
  81 #include "block.h"
  82 #include "ctfread.h"
  83 #include "psympriv.h"
  84
  85 #if ENABLE_LIBCTF
  86
  87 #include "ctf.h"
  88 #include "ctf-api.h"
  89
  90 static const struct objfile_key<htab, htab_deleter> ctf_tid_key;
  91
  92 struct ctf_fp_info
  93 {
  94   explicit ctf_fp_info (ctf_dict_t *cfp) : fp (cfp) {}
  95   ~ctf_fp_info ();
  96   ctf_dict_t *fp;
  97 };
  98
  99 /* Cleanup function for the ctf_dict_key data.  */
 100 ctf_fp_info::~ctf_fp_info ()
 101 {
 102   if (fp == nullptr)
 103     return;
 104
 105   ctf_archive_t *arc = ctf_get_arc (fp);
 106   ctf_dict_close (fp);
 107   ctf_close (arc);
 108 }
 109
 110 static const objfile_key<ctf_fp_info> ctf_dict_key;
 111
 112 /* A CTF context consists of a file pointer and an objfile pointer.  */
 113
 114 struct ctf_context
 115 {
 116   ctf_dict_t *fp;
 117   struct objfile *of;
 118   psymtab_storage *partial_symtabs;
 119   partial_symtab *pst;
 120   struct buildsym_compunit *builder;
 121 };
 122
 123 /* A partial symtab, specialized for this module.  */
 124 struct ctf_psymtab : public standard_psymtab
 125 {
 126   ctf_psymtab (const char *filename,
 127                psymtab_storage *partial_symtabs,
 128                struct objfile *objfile,
 129                CORE_ADDR addr)
 130     : standard_psymtab (filename, partial_symtabs, objfile, addr)
 131   {
 132   }
 133
 134   void read_symtab (struct objfile *) override;
 135   void expand_psymtab (struct objfile *) override;
 136
 137   struct ctf_context *context;
 138 };
 139
 140 /* The routines that read and process fields/members of a C struct, union,
 141    or enumeration, pass lists of data member fields in an instance of a
 142    ctf_field_info structure. It is derived from dwarf2read.c.  */
 143
 144 struct ctf_nextfield
 145 {
 146   struct field field {};
 147 };
 148
 149 struct ctf_field_info
 150 {
 151   /* List of data member fields.  */
 152   std::vector<struct ctf_nextfield> fields;
 153
 154   /* Context.  */
 155   struct ctf_context *cur_context;
 156
 157   /* Parent type.  */
 158   struct type *ptype;
 159
 160   /* typedefs defined inside this class.  TYPEDEF_FIELD_LIST contains head
 161      of a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements.  */
 162   std::vector<struct decl_field> typedef_field_list;
 163
 164   /* Nested types defined by this struct and the number of elements in
 165      this list.  */
 166   std::vector<struct decl_field> nested_types_list;
 167 };
 168
 169
 170 /* Local function prototypes */
 171
 172 static int ctf_add_type_cb (ctf_id_t tid, void *arg);
 173
 174 static struct type *read_array_type (struct ctf_context *cp, ctf_id_t tid);
 175
 176 static struct type *read_pointer_type (struct ctf_context *cp, ctf_id_t tid,
 177                                        ctf_id_t btid);
 178
 179 static struct type *read_structure_type (struct ctf_context *cp, ctf_id_t tid);
 180
 181 static struct type *read_enum_type (struct ctf_context *cp, ctf_id_t tid);
 182
 183 static struct type *read_typedef_type (struct ctf_context *cp, ctf_id_t tid,
 184                                        ctf_id_t btid, const char *name);
 185
 186 static struct type *read_type_record (struct ctf_context *cp, ctf_id_t tid);
 187
 188 static void process_structure_type (struct ctf_context *cp, ctf_id_t tid);
 189
 190 static void process_struct_members (struct ctf_context *cp, ctf_id_t tid,
 191                                     struct type *type);
 192
 193 static struct symbol *new_symbol (struct ctf_context *cp, struct type *type,
 194                                   ctf_id_t tid);
 195
 196 struct ctf_tid_and_type
 197 {
 198   ctf_id_t tid;
 199   struct type *type;
 200 };
 201
 202 /* Hash function for a ctf_tid_and_type.  */
 203
 204 static hashval_t
 205 tid_and_type_hash (const void *item)
 206 {
 207   const struct ctf_tid_and_type *ids
 208     = (const struct ctf_tid_and_type *) item;
 209
 210   return ids->tid;
 211 }
 212
 213 /* Equality function for a ctf_tid_and_type.  */
 214
 215 static int
 216 tid_and_type_eq (const void *item_lhs, const void *item_rhs)
 217 {
 218   const struct ctf_tid_and_type *ids_lhs
 219     = (const struct ctf_tid_and_type *) item_lhs;
 220   const struct ctf_tid_and_type *ids_rhs
 221     = (const struct ctf_tid_and_type *) item_rhs;
 222
 223   return ids_lhs->tid == ids_rhs->tid;
 224 }
 225
 226 /* Set the type associated with TID to TYP.  */
 227
 228 static struct type *
 229 set_tid_type (struct objfile *of, ctf_id_t tid, struct type *typ)
 230 {
 231   htab_t htab;
 232
 233   htab = (htab_t) ctf_tid_key.get (of);
 234   if (htab == NULL)
 235     {
 236       htab = htab_create_alloc (1, tid_and_type_hash,
 237                                 tid_and_type_eq,
 238                                 NULL, xcalloc, xfree);
 239       ctf_tid_key.set (of, htab);
 240     }
 241
 242   struct ctf_tid_and_type **slot, ids;
 243   ids.tid = tid;
 244   ids.type = typ;
 245   slot = (struct ctf_tid_and_type **) htab_find_slot (htab, &ids, INSERT);
 246   if (*slot)
 247     complaint (_("An internal GDB problem: ctf_ id_t %ld type already set"),
 248                (tid));
 249   *slot = XOBNEW (&of->objfile_obstack, struct ctf_tid_and_type);
 250   **slot = ids;
 251   return typ;
 252 }
 253
 254 /* Look up the type for TID in tid_and_type hash, return NULL if hash is
 255    empty or TID does not have a saved type.  */
 256
 257 static struct type *
 258 get_tid_type (struct objfile *of, ctf_id_t tid)
 259 {
 260   struct ctf_tid_and_type *slot, ids;
 261   htab_t htab;
 262
 263   htab = (htab_t) ctf_tid_key.get (of);
 264   if (htab == NULL)
 265     return nullptr;
 266
 267   ids.tid = tid;
 268   ids.type = nullptr;
 269   slot = (struct ctf_tid_and_type *) htab_find (htab, &ids);
 270   if (slot)
 271     return slot->type;
 272   else
 273     return nullptr;
 274 }
 275
 276 /* Return the size of storage in bits for INTEGER, FLOAT, or ENUM.  */
 277
 278 static int
 279 get_bitsize (ctf_dict_t *fp, ctf_id_t tid, uint32_t kind)
 280 {
 281   ctf_encoding_t cet;
 282
 283   if ((kind == CTF_K_INTEGER || kind == CTF_K_ENUM
 284       || kind == CTF_K_FLOAT)
 285       && ctf_type_reference (fp, tid) != CTF_ERR
 286       && ctf_type_encoding (fp, tid, &cet) != CTF_ERR)
 287     return cet.cte_bits;
 288
 289   return 0;
 290 }
 291
 292 /* Set SYM's address, with NAME, from its minimal symbol entry.  */
 293
 294 static void
 295 set_symbol_address (struct objfile *of, struct symbol *sym, const char *name)
 296 {
 297   struct bound_minimal_symbol msym;
 298
 299   msym = lookup_minimal_symbol (name, nullptr, of);
 300   if (msym.minsym != NULL)
 301     {
 302       SET_SYMBOL_VALUE_ADDRESS (sym, BMSYMBOL_VALUE_ADDRESS (msym));
 303       SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
 304       sym->set_section_index (msym.minsym->section_index ());
 305     }
 306 }
 307
 308 /* Create the vector of fields, and attach it to TYPE.  */
 309
 310 static void
 311 attach_fields_to_type (struct ctf_field_info *fip, struct type *type)
 312 {
 313   int nfields = fip->fields.size ();
 314
 315   if (nfields == 0)
 316     return;
 317
 318   /* Record the field count, allocate space for the array of fields.  */
 319   type->set_num_fields (nfields);
 320   type->set_fields
 321     ((struct field *) TYPE_ZALLOC (type, sizeof (struct field) * nfields));
 322
 323   /* Copy the saved-up fields into the field vector.  */
 324   for (int i = 0; i < nfields; ++i)
 325     {
 326       struct ctf_nextfield &field = fip->fields[i];
 327       type->field (i) = field.field;
 328     }
 329 }
 330
 331 /* Allocate a floating-point type of size BITS and name NAME.  Pass NAME_HINT
 332    (which may be different from NAME) to the architecture back-end to allow
 333    it to guess the correct format if necessary.  */
 334
 335 static struct type *
 336 ctf_init_float_type (struct objfile *objfile,
 337                      int bits,
 338                      const char *name,
 339                      const char *name_hint)
 340 {
 341   struct gdbarch *gdbarch = objfile->arch ();
 342   const struct floatformat **format;
 343   struct type *type;
 344
 345   format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits);
 346   if (format != nullptr)
 347     type = init_float_type (objfile, bits, name, format);
 348   else
 349     type = init_type (objfile, TYPE_CODE_ERROR, bits, name);
 350
 351   return type;
 352 }
 353
 354 /* Callback to add member NAME to a struct/union type. TID is the type
 355    of struct/union member, OFFSET is the offset of member in bits,
 356    and ARG contains the ctf_field_info.  */
 357
 358 static int
 359 ctf_add_member_cb (const char *name,
 360                    ctf_id_t tid,
 361                    unsigned long offset,
 362                    void *arg)
 363 {
 364   struct ctf_field_info *fip = (struct ctf_field_info *) arg;
 365   struct ctf_context *ccp = fip->cur_context;
 366   struct ctf_nextfield new_field;
 367   struct field *fp;
 368   struct type *t;
 369   uint32_t kind;
 370
 371   fp = &new_field.field;
 372   FIELD_NAME (*fp) = name;
 373
 374   kind = ctf_type_kind (ccp->fp, tid);
 375   t = get_tid_type (ccp->of, tid);
 376   if (t == nullptr)
 377     {
 378       t = read_type_record (ccp, tid);
 379       if (t == nullptr)
 380         {
 381           complaint (_("ctf_add_member_cb: %s has NO type (%ld)"), name, tid);
 382           t = objfile_type (ccp->of)->builtin_error;
 383           set_tid_type (ccp->of, tid, t);
 384         }
 385     }
 386
 387   if (kind == CTF_K_STRUCT || kind == CTF_K_UNION)
 388     process_struct_members (ccp, tid, t);
 389
 390   fp->set_type (t);
 391   SET_FIELD_BITPOS (*fp, offset / TARGET_CHAR_BIT);
 392   FIELD_BITSIZE (*fp) = get_bitsize (ccp->fp, tid, kind);
 393
 394   fip->fields.emplace_back (new_field);
 395
 396   return 0;
 397 }
 398
 399 /* Callback to add member NAME of EVAL to an enumeration type.
 400    ARG contains the ctf_field_info.  */
 401
 402 static int
 403 ctf_add_enum_member_cb (const char *name, int enum_value, void *arg)
 404 {
 405   struct ctf_field_info *fip = (struct ctf_field_info *) arg;
 406   struct ctf_nextfield new_field;
 407   struct field *fp;
 408   struct ctf_context *ccp = fip->cur_context;
 409
 410   fp = &new_field.field;
 411   FIELD_NAME (*fp) = name;
 412   fp->set_type (nullptr);
 413   SET_FIELD_ENUMVAL (*fp, enum_value);
 414   FIELD_BITSIZE (*fp) = 0;
 415
 416   if (name != nullptr)
 417     {
 418       struct symbol *sym = new (&ccp->of->objfile_obstack) symbol;
 419       OBJSTAT (ccp->of, n_syms++);
 420
 421       sym->set_language (language_c, &ccp->of->objfile_obstack);
 422       sym->compute_and_set_names (name, false, ccp->of->per_bfd);
 423       SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
 424       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
 425       SYMBOL_TYPE (sym) = fip->ptype;
 426       add_symbol_to_list (sym, ccp->builder->get_global_symbols ());
 427     }
 428
 429   fip->fields.emplace_back (new_field);
 430
 431   return 0;
 432 }
 433
 434 /* Add a new symbol entry, with its name from TID, its access index and
 435    domain from TID's kind, and its type from TYPE.  */
 436
 437 static struct symbol *
 438 new_symbol (struct ctf_context *ccp, struct type *type, ctf_id_t tid)
 439 {
 440   struct objfile *objfile = ccp->of;
 441   ctf_dict_t *fp = ccp->fp;
 442   struct symbol *sym = nullptr;
 443
 444   gdb::unique_xmalloc_ptr<char> name (ctf_type_aname_raw (fp, tid));
 445   if (name != nullptr)
 446     {
 447       sym = new (&objfile->objfile_obstack) symbol;
 448       OBJSTAT (objfile, n_syms++);
 449
 450       sym->set_language (language_c, &objfile->objfile_obstack);
 451       sym->compute_and_set_names (name.get (), true, objfile->per_bfd);
 452       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
 453       SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT;
 454
 455       if (type != nullptr)
 456         SYMBOL_TYPE (sym) = type;
 457
 458       uint32_t kind = ctf_type_kind (fp, tid);
 459       switch (kind)
 460         {
 461           case CTF_K_STRUCT:
 462           case CTF_K_UNION:
 463           case CTF_K_ENUM:
 464             SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
 465             SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
 466             break;
 467           case CTF_K_FUNCTION:
 468             SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
 469             break;
 470           case CTF_K_CONST:
 471             if (SYMBOL_TYPE (sym)->code () == TYPE_CODE_VOID)
 472               SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int;
 473             break;
 474           case CTF_K_TYPEDEF:
 475           case CTF_K_INTEGER:
 476           case CTF_K_FLOAT:
 477             SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
 478             SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
 479             break;
 480           case CTF_K_POINTER:
 481             break;
 482           case CTF_K_VOLATILE:
 483           case CTF_K_RESTRICT:
 484             break;
 485           case CTF_K_SLICE:
 486           case CTF_K_ARRAY:
 487           case CTF_K_UNKNOWN:
 488             break;
 489         }
 490
 491       add_symbol_to_list (sym, ccp->builder->get_global_symbols ());
 492     }
 493
 494   return sym;
 495 }
 496
 497 /* Given a TID of kind CTF_K_INTEGER or CTF_K_FLOAT, find a representation
 498    and create the symbol for it.  */
 499
 500 static struct type *
 501 read_base_type (struct ctf_context *ccp, ctf_id_t tid)
 502 {
 503   struct objfile *of = ccp->of;
 504   ctf_dict_t *fp = ccp->fp;
 505   ctf_encoding_t cet;
 506   struct type *type = nullptr;
 507   char *name;
 508   uint32_t kind;
 509
 510   if (ctf_type_encoding (fp, tid, &cet))
 511     {
 512       complaint (_("ctf_type_encoding read_base_type failed - %s"),
 513                  ctf_errmsg (ctf_errno (fp)));
 514       return nullptr;
 515     }
 516
 517   gdb::unique_xmalloc_ptr<char> copied_name (ctf_type_aname_raw (fp, tid));
 518   if (copied_name == nullptr || strlen (copied_name.get ()) == 0)
 519     {
 520       name = ctf_type_aname (fp, tid);
 521       if (name == nullptr)
 522         complaint (_("ctf_type_aname read_base_type failed - %s"),
 523                    ctf_errmsg (ctf_errno (fp)));
 524     }
 525   else
 526     name = obstack_strdup (&of->objfile_obstack, copied_name.get ());
 527
 528   kind = ctf_type_kind (fp, tid);
 529   if (kind == CTF_K_INTEGER)
 530     {
 531       uint32_t issigned, ischar, isbool;
 532       struct gdbarch *gdbarch = of->arch ();
 533
 534       issigned = cet.cte_format & CTF_INT_SIGNED;
 535       ischar = cet.cte_format & CTF_INT_CHAR;
 536       isbool = cet.cte_format & CTF_INT_BOOL;
 537       if (ischar)
 538         type = init_character_type (of, TARGET_CHAR_BIT, !issigned, name);
 539       else if (isbool)
 540         type = init_boolean_type (of, gdbarch_int_bit (gdbarch),
 541                                   !issigned, name);
 542       else
 543         {
 544           int bits;
 545           if (cet.cte_bits && ((cet.cte_bits % TARGET_CHAR_BIT) == 0))
 546             bits = cet.cte_bits;
 547           else
 548             bits = gdbarch_int_bit (gdbarch);
 549           type = init_integer_type (of, bits, !issigned, name);
 550         }
 551     }
 552   else if (kind == CTF_K_FLOAT)
 553     {
 554       uint32_t isflt;
 555       isflt = !((cet.cte_format & CTF_FP_IMAGRY) == CTF_FP_IMAGRY
 556                  || (cet.cte_format & CTF_FP_DIMAGRY) == CTF_FP_DIMAGRY
 557                  || (cet.cte_format & CTF_FP_LDIMAGRY) == CTF_FP_LDIMAGRY);
 558       if (isflt)
 559         type = ctf_init_float_type (of, cet.cte_bits, name, name);
 560       else
 561         {
 562           struct type *t
 563             = ctf_init_float_type (of, cet.cte_bits / 2, NULL, name);
 564           type = init_complex_type (name, t);
 565         }
 566     }
 567   else
 568     {
 569       complaint (_("read_base_type: unsupported base kind (%d)"), kind);
 570       type = init_type (of, TYPE_CODE_ERROR, cet.cte_bits, name);
 571     }
 572
 573   if (name != nullptr && strcmp (name, "char") == 0)
 574     type->set_has_no_signedness (true);
 575
 576   return set_tid_type (of, tid, type);
 577 }
 578
 579 static void
 580 process_base_type (struct ctf_context *ccp, ctf_id_t tid)
 581 {
 582   struct type *type;
 583
 584   type = read_base_type (ccp, tid);
 585   new_symbol (ccp, type, tid);
 586 }
 587
 588 /* Start a structure or union scope (definition) with TID to create a type
 589    for the structure or union.
 590
 591    Fill in the type's name and general properties. The members will not be
 592    processed, nor a symbol table entry be done until process_structure_type
 593    (assuming the type has a name).  */
 594
 595 static struct type *
 596 read_structure_type (struct ctf_context *ccp, ctf_id_t tid)
 597 {
 598   struct objfile *of = ccp->of;
 599   ctf_dict_t *fp = ccp->fp;
 600   struct type *type;
 601   uint32_t kind;
 602
 603   type = alloc_type (of);
 604
 605   gdb::unique_xmalloc_ptr<char> name (ctf_type_aname_raw (fp, tid));
 606   if (name != nullptr && strlen (name.get ()) != 0)
 607     type->set_name (obstack_strdup (&of->objfile_obstack, name.get ()));
 608
 609   kind = ctf_type_kind (fp, tid);
 610   if (kind == CTF_K_UNION)
 611     type->set_code (TYPE_CODE_UNION);
 612   else
 613     type->set_code (TYPE_CODE_STRUCT);
 614
 615   TYPE_LENGTH (type) = ctf_type_size (fp, tid);
 616   set_type_align (type, ctf_type_align (fp, tid));
 617
 618   return set_tid_type (ccp->of, tid, type);
 619 }
 620
 621 /* Given a tid of CTF_K_STRUCT or CTF_K_UNION, process all its members
 622    and create the symbol for it.  */
 623
 624 static void
 625 process_struct_members (struct ctf_context *ccp,
 626                         ctf_id_t tid,
 627                         struct type *type)
 628 {
 629   struct ctf_field_info fi;
 630
 631   fi.cur_context = ccp;
 632   if (ctf_member_iter (ccp->fp, tid, ctf_add_member_cb, &fi) == CTF_ERR)
 633     complaint (_("ctf_member_iter process_struct_members failed - %s"),
 634                ctf_errmsg (ctf_errno (ccp->fp)));
 635
 636   /* Attach fields to the type.  */
 637   attach_fields_to_type (&fi, type);
 638
 639   new_symbol (ccp, type, tid);
 640 }
 641
 642 static void
 643 process_structure_type (struct ctf_context *ccp, ctf_id_t tid)
 644 {
 645   struct type *type;
 646
 647   type = read_structure_type (ccp, tid);
 648   process_struct_members (ccp, tid, type);
 649 }
 650
 651 /* Create a function type for TID and set its return type.  */
 652
 653 static struct type *
 654 read_func_kind_type (struct ctf_context *ccp, ctf_id_t tid)
 655 {
 656   struct objfile *of = ccp->of;
 657   ctf_dict_t *fp = ccp->fp;
 658   struct type *type, *rettype, *atype;
 659   ctf_funcinfo_t cfi;
 660   uint32_t argc;
 661
 662   type = alloc_type (of);
 663
 664   gdb::unique_xmalloc_ptr<char> name (ctf_type_aname_raw (fp, tid));
 665   if (name != nullptr && strlen (name.get ()) != 0)
 666     type->set_name (obstack_strdup (&of->objfile_obstack, name.get ()));
 667
 668   type->set_code (TYPE_CODE_FUNC);
 669   ctf_func_type_info (fp, tid, &cfi);
 670   rettype = get_tid_type (of, cfi.ctc_return);
 671   TYPE_TARGET_TYPE (type) = rettype;
 672   set_type_align (type, ctf_type_align (fp, tid));
 673
 674   /* Set up function's arguments.  */
 675   argc = cfi.ctc_argc;
 676   type->set_num_fields (argc);
 677   if ((cfi.ctc_flags & CTF_FUNC_VARARG) != 0)
 678     type->set_has_varargs (true);
 679
 680   if (argc != 0)
 681     {
 682       std::vector<ctf_id_t> argv (argc);
 683       if (ctf_func_type_args (fp, tid, argc, argv.data ()) == CTF_ERR)
 684         return nullptr;
 685
 686       type->set_fields
 687         ((struct field *) TYPE_ZALLOC (type, argc * sizeof (struct field)));
 688       struct type *void_type = objfile_type (of)->builtin_void;
 689       /* If failed to find the argument type, fill it with void_type.  */
 690       for (int iparam = 0; iparam < argc; iparam++)
 691         {
 692           atype = get_tid_type (of, argv[iparam]);
 693           if (atype != nullptr)
 694             type->field (iparam).set_type (atype);
 695           else
 696             type->field (iparam).set_type (void_type);
 697         }
 698     }
 699
 700   return set_tid_type (of, tid, type);
 701 }
 702
 703 /* Given a TID of CTF_K_ENUM, process all the members of the
 704    enumeration, and create the symbol for the enumeration type.  */
 705
 706 static struct type *
 707 read_enum_type (struct ctf_context *ccp, ctf_id_t tid)
 708 {
 709   struct objfile *of = ccp->of;
 710   ctf_dict_t *fp = ccp->fp;
 711   struct type *type, *target_type;
 712   ctf_funcinfo_t fi;
 713
 714   type = alloc_type (of);
 715
 716   gdb::unique_xmalloc_ptr<char> name (ctf_type_aname_raw (fp, tid));
 717   if (name != nullptr && strlen (name.get ()) != 0)
 718     type->set_name (obstack_strdup (&of->objfile_obstack, name.get ()));
 719
 720   type->set_code (TYPE_CODE_ENUM);
 721   TYPE_LENGTH (type) = ctf_type_size (fp, tid);
 722   ctf_func_type_info (fp, tid, &fi);
 723   target_type = get_tid_type (of, fi.ctc_return);
 724   TYPE_TARGET_TYPE (type) = target_type;
 725   set_type_align (type, ctf_type_align (fp, tid));
 726
 727   return set_tid_type (of, tid, type);
 728 }
 729
 730 static void
 731 process_enum_type (struct ctf_context *ccp, ctf_id_t tid)
 732 {
 733   struct type *type;
 734   struct ctf_field_info fi;
 735
 736   type = read_enum_type (ccp, tid);
 737
 738   fi.cur_context = ccp;
 739   fi.ptype = type;
 740   if (ctf_enum_iter (ccp->fp, tid, ctf_add_enum_member_cb, &fi) == CTF_ERR)
 741     complaint (_("ctf_enum_iter process_enum_type failed - %s"),
 742                ctf_errmsg (ctf_errno (ccp->fp)));
 743
 744   /* Attach fields to the type.  */
 745   attach_fields_to_type (&fi, type);
 746
 747   new_symbol (ccp, type, tid);
 748 }
 749
 750 /* Add given cv-qualifiers CNST+VOLTL to the BASE_TYPE of array TID.  */
 751
 752 static struct type *
 753 add_array_cv_type (struct ctf_context *ccp,
 754                    ctf_id_t tid,
 755                    struct type *base_type,
 756                    int cnst,
 757                    int voltl)
 758 {
 759   struct type *el_type, *inner_array;
 760
 761   base_type = copy_type (base_type);
 762   inner_array = base_type;
 763
 764   while (TYPE_TARGET_TYPE (inner_array)->code () == TYPE_CODE_ARRAY)
 765     {
 766       TYPE_TARGET_TYPE (inner_array)
 767         = copy_type (TYPE_TARGET_TYPE (inner_array));
 768       inner_array = TYPE_TARGET_TYPE (inner_array);
 769     }
 770
 771   el_type = TYPE_TARGET_TYPE (inner_array);
 772   cnst |= TYPE_CONST (el_type);
 773   voltl |= TYPE_VOLATILE (el_type);
 774   TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, nullptr);
 775
 776   return set_tid_type (ccp->of, tid, base_type);
 777 }
 778
 779 /* Read all information from a TID of CTF_K_ARRAY.  */
 780
 781 static struct type *
 782 read_array_type (struct ctf_context *ccp, ctf_id_t tid)
 783 {
 784   struct objfile *objfile = ccp->of;
 785   ctf_dict_t *fp = ccp->fp;
 786   struct type *element_type, *range_type, *idx_type;
 787   struct type *type;
 788   ctf_arinfo_t ar;
 789
 790   if (ctf_array_info (fp, tid, &ar) == CTF_ERR)
 791     {
 792       complaint (_("ctf_array_info read_array_type failed - %s"),
 793                  ctf_errmsg (ctf_errno (fp)));
 794       return nullptr;
 795     }
 796
 797   element_type = get_tid_type (objfile, ar.ctr_contents);
 798   if (element_type == nullptr)
 799     return nullptr;
 800
 801   idx_type = get_tid_type (objfile, ar.ctr_index);
 802   if (idx_type == nullptr)
 803     idx_type = objfile_type (objfile)->builtin_int;
 804
 805   range_type = create_static_range_type (NULL, idx_type, 0, ar.ctr_nelems - 1);
 806   type = create_array_type (NULL, element_type, range_type);
 807   if (ar.ctr_nelems <= 1)       /* Check if undefined upper bound.  */
 808     {
 809       range_type->bounds ()->high.set_undefined ();
 810       TYPE_LENGTH (type) = 0;
 811       type->set_target_is_stub (true);
 812     }
 813   else
 814     TYPE_LENGTH (type) = ctf_type_size (fp, tid);
 815
 816   set_type_align (type, ctf_type_align (fp, tid));
 817
 818   return set_tid_type (objfile, tid, type);
 819 }
 820
 821 /* Read TID of kind CTF_K_CONST with base type BTID.  */
 822
 823 static struct type *
 824 read_const_type (struct ctf_context *ccp, ctf_id_t tid, ctf_id_t btid)
 825 {
 826   struct objfile *objfile = ccp->of;
 827   struct type *base_type, *cv_type;
 828
 829   base_type = get_tid_type (objfile, btid);
 830   if (base_type == nullptr)
 831     {
 832       base_type = read_type_record (ccp, btid);
 833       if (base_type == nullptr)
 834         {
 835           complaint (_("read_const_type: NULL base type (%ld)"), btid);
 836           base_type = objfile_type (objfile)->builtin_error;
 837         }
 838     }
 839   cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0);
 840
 841   return set_tid_type (objfile, tid, cv_type);
 842 }
 843
 844 /* Read TID of kind CTF_K_VOLATILE with base type BTID.  */
 845
 846 static struct type *
 847 read_volatile_type (struct ctf_context *ccp, ctf_id_t tid, ctf_id_t btid)
 848 {
 849   struct objfile *objfile = ccp->of;
 850   ctf_dict_t *fp = ccp->fp;
 851   struct type *base_type, *cv_type;
 852
 853   base_type = get_tid_type (objfile, btid);
 854   if (base_type == nullptr)
 855     {
 856       base_type = read_type_record (ccp, btid);
 857       if (base_type == nullptr)
 858         {
 859           complaint (_("read_volatile_type: NULL base type (%ld)"), btid);
 860           base_type = objfile_type (objfile)->builtin_error;
 861         }
 862     }
 863
 864   if (ctf_type_kind (fp, btid) == CTF_K_ARRAY)
 865     return add_array_cv_type (ccp, tid, base_type, 0, 1);
 866   cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0);
 867
 868   return set_tid_type (objfile, tid, cv_type);
 869 }
 870
 871 /* Read TID of kind CTF_K_RESTRICT with base type BTID.  */
 872
 873 static struct type *
 874 read_restrict_type (struct ctf_context *ccp, ctf_id_t tid, ctf_id_t btid)
 875 {
 876   struct objfile *objfile = ccp->of;
 877   struct type *base_type, *cv_type;
 878
 879   base_type = get_tid_type (objfile, btid);
 880   if (base_type == nullptr)
 881     {
 882       base_type = read_type_record (ccp, btid);
 883       if (base_type == nullptr)
 884         {
 885           complaint (_("read_restrict_type: NULL base type (%ld)"), btid);
 886           base_type = objfile_type (objfile)->builtin_error;
 887         }
 888     }
 889   cv_type = make_restrict_type (base_type);
 890
 891   return set_tid_type (objfile, tid, cv_type);
 892 }
 893
 894 /* Read TID of kind CTF_K_TYPEDEF with its NAME and base type BTID.  */
 895
 896 static struct type *
 897 read_typedef_type (struct ctf_context *ccp, ctf_id_t tid,
 898                    ctf_id_t btid, const char *name)
 899 {
 900   struct objfile *objfile = ccp->of;
 901   struct type *this_type, *target_type;
 902
 903   char *aname = obstack_strdup (&objfile->objfile_obstack, name);
 904   this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, aname);
 905   set_tid_type (objfile, tid, this_type);
 906   target_type = get_tid_type (objfile, btid);
 907   if (target_type != this_type)
 908     TYPE_TARGET_TYPE (this_type) = target_type;
 909   else
 910     TYPE_TARGET_TYPE (this_type) = nullptr;
 911
 912   this_type->set_target_is_stub (TYPE_TARGET_TYPE (this_type) != nullptr);
 913
 914   return set_tid_type (objfile, tid, this_type);
 915 }
 916
 917 /* Read TID of kind CTF_K_POINTER with base type BTID.  */
 918
 919 static struct type *
 920 read_pointer_type (struct ctf_context *ccp, ctf_id_t tid, ctf_id_t btid)
 921 {
 922   struct objfile *of = ccp->of;
 923   struct type *target_type, *type;
 924
 925   target_type = get_tid_type (of, btid);
 926   if (target_type == nullptr)
 927     {
 928       target_type = read_type_record (ccp, btid);
 929       if (target_type == nullptr)
 930         {
 931           complaint (_("read_pointer_type: NULL target type (%ld)"), btid);
 932           target_type = objfile_type (ccp->of)->builtin_error;
 933         }
 934     }
 935
 936   type = lookup_pointer_type (target_type);
 937   set_type_align (type, ctf_type_align (ccp->fp, tid));
 938
 939   return set_tid_type (of, tid, type);
 940 }
 941
 942 /* Read information associated with type TID.  */
 943
 944 static struct type *
 945 read_type_record (struct ctf_context *ccp, ctf_id_t tid)
 946 {
 947   ctf_dict_t *fp = ccp->fp;
 948   uint32_t kind;
 949   struct type *type = nullptr;
 950   ctf_id_t btid;
 951
 952   kind = ctf_type_kind (fp, tid);
 953   switch (kind)
 954     {
 955       case CTF_K_STRUCT:
 956       case CTF_K_UNION:
 957         type = read_structure_type (ccp, tid);
 958         break;
 959       case CTF_K_ENUM:
 960         type = read_enum_type (ccp, tid);
 961         break;
 962       case CTF_K_FUNCTION:
 963         type = read_func_kind_type (ccp, tid);
 964         break;
 965       case CTF_K_CONST:
 966         btid = ctf_type_reference (fp, tid);
 967         type = read_const_type (ccp, tid, btid);
 968         break;
 969       case CTF_K_TYPEDEF:
 970         {
 971           gdb::unique_xmalloc_ptr<char> name (ctf_type_aname_raw (fp, tid));
 972           btid = ctf_type_reference (fp, tid);
 973           type = read_typedef_type (ccp, tid, btid, name.get ());
 974         }
 975         break;
 976       case CTF_K_VOLATILE:
 977         btid = ctf_type_reference (fp, tid);
 978         type = read_volatile_type (ccp, tid, btid);
 979         break;
 980       case CTF_K_RESTRICT:
 981         btid = ctf_type_reference (fp, tid);
 982         type = read_restrict_type (ccp, tid, btid);
 983         break;
 984       case CTF_K_POINTER:
 985         btid = ctf_type_reference (fp, tid);
 986         type = read_pointer_type (ccp, tid, btid);
 987         break;
 988       case CTF_K_INTEGER:
 989       case CTF_K_FLOAT:
 990         type = read_base_type (ccp, tid);
 991         break;
 992       case CTF_K_ARRAY:
 993         type = read_array_type (ccp, tid);
 994         break;
 995       case CTF_K_UNKNOWN:
 996         break;
 997       default:
 998         break;
 999     }
1000
1001   return type;
1002 }
1003
1004 /* Callback to add type TID to the symbol table.  */
1005
1006 static int
1007 ctf_add_type_cb (ctf_id_t tid, void *arg)
1008 {
1009   struct ctf_context *ccp = (struct ctf_context *) arg;
1010   struct type *type;
1011   uint32_t kind;
1012
1013   /* Check if tid's type has already been defined.  */
1014   type = get_tid_type (ccp->of, tid);
1015   if (type != nullptr)
1016     return 0;
1017
1018   ctf_id_t btid = ctf_type_reference (ccp->fp, tid);
1019   kind = ctf_type_kind (ccp->fp, tid);
1020   switch (kind)
1021     {
1022       case CTF_K_STRUCT:
1023       case CTF_K_UNION:
1024         process_structure_type (ccp, tid);
1025         break;
1026       case CTF_K_ENUM:
1027         process_enum_type (ccp, tid);
1028         break;
1029       case CTF_K_FUNCTION:
1030         type = read_func_kind_type (ccp, tid);
1031         new_symbol (ccp, type, tid);
1032         break;
1033       case CTF_K_INTEGER:
1034       case CTF_K_FLOAT:
1035         process_base_type (ccp, tid);
1036         break;
1037       case CTF_K_TYPEDEF:
1038         new_symbol (ccp, read_type_record (ccp, tid), tid);
1039         break;
1040       case CTF_K_CONST:
1041         type = read_const_type (ccp, tid, btid);
1042         new_symbol (ccp, type, tid);
1043         break;
1044       case CTF_K_VOLATILE:
1045         type = read_volatile_type (ccp, tid, btid);
1046         new_symbol (ccp, type, tid);
1047         break;
1048       case CTF_K_RESTRICT:
1049         type = read_restrict_type (ccp, tid, btid);
1050         new_symbol (ccp, type, tid);
1051         break;
1052       case CTF_K_POINTER:
1053         type = read_pointer_type (ccp, tid, btid);
1054         new_symbol (ccp, type, tid);
1055         break;
1056       case CTF_K_ARRAY:
1057         type = read_array_type (ccp, tid);
1058         new_symbol (ccp, type, tid);
1059         break;
1060       case CTF_K_UNKNOWN:
1061         break;
1062       default:
1063         break;
1064     }
1065
1066   return 0;
1067 }
1068
1069 /* Callback to add variable NAME with TID to the symbol table.  */
1070
1071 static int
1072 ctf_add_var_cb (const char *name, ctf_id_t id, void *arg)
1073 {
1074   struct ctf_context *ccp = (struct ctf_context *) arg;
1075   struct symbol *sym = nullptr;
1076   struct type *type;
1077   uint32_t kind;
1078
1079   type = get_tid_type (ccp->of, id);
1080
1081   kind = ctf_type_kind (ccp->fp, id);
1082   switch (kind)
1083     {
1084       case CTF_K_FUNCTION:
1085         if (name != nullptr && strcmp (name, "main") == 0)
1086           set_objfile_main_name (ccp->of, name, language_c);
1087         break;
1088       case CTF_K_INTEGER:
1089       case CTF_K_FLOAT:
1090       case CTF_K_VOLATILE:
1091       case CTF_K_RESTRICT:
1092       case CTF_K_TYPEDEF:
1093       case CTF_K_CONST:
1094       case CTF_K_POINTER:
1095       case CTF_K_ARRAY:
1096         if (type)
1097           {
1098             sym = new_symbol (ccp, type, id);
1099             sym->compute_and_set_names (name, false, ccp->of->per_bfd);
1100           }
1101         break;
1102       case CTF_K_STRUCT:
1103       case CTF_K_UNION:
1104       case CTF_K_ENUM:
1105         if (type == nullptr)
1106         {
1107           complaint (_("ctf_add_var_cb: %s has NO type (%ld)"), name, id);
1108           type = objfile_type (ccp->of)->builtin_error;
1109         }
1110         sym = new (&ccp->of->objfile_obstack) symbol;
1111         OBJSTAT (ccp->of, n_syms++);
1112         SYMBOL_TYPE (sym) = type;
1113         SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
1114         SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT;
1115         sym->compute_and_set_names (name, false, ccp->of->per_bfd);
1116         add_symbol_to_list (sym, ccp->builder->get_global_symbols ());
1117         break;
1118       default:
1119         complaint (_("ctf_add_var_cb: kind unsupported (%d)"), kind);
1120         break;
1121     }
1122
1123   if (sym != nullptr)
1124     set_symbol_address (ccp->of, sym, name);
1125
1126   return 0;
1127 }
1128
1129 /* Add an ELF STT_OBJ symbol with index IDX to the symbol table.  */
1130
1131 static struct symbol *
1132 add_stt_obj (struct ctf_context *ccp, unsigned long idx)
1133 {
1134   struct symbol *sym;
1135   struct type *type;
1136   ctf_id_t tid;
1137
1138   if ((tid = ctf_lookup_by_symbol (ccp->fp, idx)) == CTF_ERR)
1139     return nullptr;
1140
1141   type = get_tid_type (ccp->of, tid);
1142   if (type == nullptr)
1143     return nullptr;
1144
1145   sym = new_symbol (ccp, type, tid);
1146
1147   return sym;
1148 }
1149
1150 /* Add an ELF STT_FUNC symbol with index IDX to the symbol table.  */
1151
1152 static struct symbol *
1153 add_stt_func (struct ctf_context *ccp, unsigned long idx)
1154 {
1155   struct type *ftype, *atyp, *rettyp;
1156   struct symbol *sym;
1157   ctf_funcinfo_t finfo;
1158   ctf_id_t argv[32];
1159   uint32_t argc;
1160   ctf_id_t tid;
1161   struct type *void_type = objfile_type (ccp->of)->builtin_void;
1162
1163   if (ctf_func_info (ccp->fp, idx, &finfo) == CTF_ERR)
1164     return nullptr;
1165
1166   argc = finfo.ctc_argc;
1167   if (ctf_func_args (ccp->fp, idx, argc, argv) == CTF_ERR)
1168     return nullptr;
1169
1170   gdb::unique_xmalloc_ptr<char> name (ctf_type_aname_raw (ccp->fp, idx));
1171   if (name == nullptr)
1172     return nullptr;
1173
1174   tid = ctf_lookup_by_symbol (ccp->fp, idx);
1175   ftype = get_tid_type (ccp->of, tid);
1176   if ((finfo.ctc_flags & CTF_FUNC_VARARG) != 0)
1177     ftype->set_has_varargs (true);
1178   ftype->set_num_fields (argc);
1179
1180   /* If argc is 0, it has a "void" type.  */
1181   if (argc != 0)
1182     ftype->set_fields
1183       ((struct field *) TYPE_ZALLOC (ftype, argc * sizeof (struct field)));
1184
1185   /* TYPE_FIELD_TYPE must never be NULL.  Fill it with void_type, if failed
1186      to find the argument type.  */
1187   for (int iparam = 0; iparam < argc; iparam++)
1188     {
1189       atyp = get_tid_type (ccp->of, argv[iparam]);
1190       if (atyp)
1191         ftype->field (iparam).set_type (atyp);
1192       else
1193         ftype->field (iparam).set_type (void_type);
1194     }
1195
1196   sym = new_symbol (ccp, ftype, tid);
1197   rettyp = get_tid_type (ccp->of, finfo.ctc_return);
1198   if (rettyp != nullptr)
1199     SYMBOL_TYPE (sym) = rettyp;
1200   else
1201     SYMBOL_TYPE (sym) = void_type;
1202
1203   return sym;
1204 }
1205
1206 /* Get text segment base for OBJFILE, TSIZE contains the segment size.  */
1207
1208 static CORE_ADDR
1209 get_objfile_text_range (struct objfile *of, int *tsize)
1210 {
1211   bfd *abfd = of->obfd;
1212   const asection *codes;
1213
1214   codes = bfd_get_section_by_name (abfd, ".text");
1215   *tsize = codes ? bfd_section_size (codes) : 0;
1216   return of->text_section_offset ();
1217 }
1218
1219 /* Start a symtab for OBJFILE in CTF format.  */
1220
1221 static void
1222 ctf_start_symtab (ctf_psymtab *pst,
1223                   struct objfile *of, CORE_ADDR text_offset)
1224 {
1225   struct ctf_context *ccp;
1226
1227   ccp = pst->context;
1228   ccp->builder = new buildsym_compunit
1229                        (of, of->original_name, nullptr,
1230                        language_c, text_offset);
1231   ccp->builder->record_debugformat ("ctf");
1232 }
1233
1234 /* Finish reading symbol/type definitions in CTF format.
1235    END_ADDR is the end address of the file's text.  SECTION is
1236    the .text section number.  */
1237
1238 static struct compunit_symtab *
1239 ctf_end_symtab (ctf_psymtab *pst,
1240                 CORE_ADDR end_addr, int section)
1241 {
1242   struct ctf_context *ccp;
1243
1244   ccp = pst->context;
1245   struct compunit_symtab *result
1246     = ccp->builder->end_symtab (end_addr, section);
1247   delete ccp->builder;
1248   ccp->builder = nullptr;
1249   return result;
1250 }
1251
1252 /* Add all members of an enum with type TID to partial symbol table.  */
1253
1254 static void
1255 ctf_psymtab_add_enums (struct ctf_context *ccp, ctf_id_t tid)
1256 {
1257   int val;
1258   const char *ename;
1259   ctf_next_t *i = nullptr;
1260
1261   while ((ename = ctf_enum_next (ccp->fp, tid, &i, &val)) != nullptr)
1262     {
1263       ccp->pst->add_psymbol (ename, true,
1264                              VAR_DOMAIN, LOC_CONST, -1,
1265                              psymbol_placement::GLOBAL,
1266                              0, language_c, ccp->partial_symtabs, ccp->of);
1267     }
1268   if (ctf_errno (ccp->fp) != ECTF_NEXT_END)
1269     complaint (_("ctf_enum_next ctf_psymtab_add_enums failed - %s"),
1270                ctf_errmsg (ctf_errno (ccp->fp)));
1271 }
1272
1273 /* Read in full symbols for PST, and anything it depends on.  */
1274
1275 void
1276 ctf_psymtab::expand_psymtab (struct objfile *objfile)
1277 {
1278   struct symbol *sym;
1279   struct ctf_context *ccp;
1280
1281   gdb_assert (!readin);
1282
1283   ccp = context;
1284
1285   /* Iterate over entries in data types section.  */
1286   if (ctf_type_iter (ccp->fp, ctf_add_type_cb, ccp) == CTF_ERR)
1287     complaint (_("ctf_type_iter psymtab_to_symtab failed - %s"),
1288                ctf_errmsg (ctf_errno (ccp->fp)));
1289
1290
1291   /* Iterate over entries in variable info section.  */
1292   if (ctf_variable_iter (ccp->fp, ctf_add_var_cb, ccp) == CTF_ERR)
1293     complaint (_("ctf_variable_iter psymtab_to_symtab failed - %s"),
1294                ctf_errmsg (ctf_errno (ccp->fp)));
1295
1296   /* Add entries in data objects and function info sections.  */
1297   for (unsigned long i = 0; ; i++)
1298     {
1299       sym = add_stt_obj (ccp, i);
1300       if (sym == nullptr)
1301         {
1302           if (ctf_errno (ccp->fp) == EINVAL
1303               || ctf_errno (ccp->fp) == ECTF_NOSYMTAB)
1304             break;
1305           sym = add_stt_func (ccp, i);
1306         }
1307       if (sym == nullptr)
1308         continue;
1309
1310       set_symbol_address (ccp->of, sym, sym->linkage_name ());
1311     }
1312
1313   readin = true;
1314 }
1315
1316 /* Expand partial symbol table PST into a full symbol table.
1317    PST is not NULL.  */
1318
1319 void
1320 ctf_psymtab::read_symtab (struct objfile *objfile)
1321 {
1322   if (readin)
1323     warning (_("bug: psymtab for %s is already read in."), filename);
1324   else
1325     {
1326       if (info_verbose)
1327         {
1328           printf_filtered (_("Reading in CTF data for %s..."), filename);
1329           gdb_flush (gdb_stdout);
1330         }
1331
1332       /* Start a symtab.  */
1333       CORE_ADDR offset;        /* Start of text segment.  */
1334       int tsize;
1335
1336       offset = get_objfile_text_range (objfile, &tsize);
1337       ctf_start_symtab (this, objfile, offset);
1338       expand_psymtab (objfile);
1339
1340       set_text_low (offset);
1341       set_text_high (offset + tsize);
1342       compunit_symtab = ctf_end_symtab (this, offset + tsize,
1343                                         SECT_OFF_TEXT (objfile));
1344
1345       /* Finish up the debug error message.  */
1346       if (info_verbose)
1347         printf_filtered (_("done.\n"));
1348     }
1349 }
1350
1351 /* Allocate a new partial_symtab NAME.
1352
1353    Each source file that has not been fully read in is represented by
1354    a partial_symtab.  This contains the information on where in the
1355    executable the debugging symbols for a specific file are, and a
1356    list of names of global symbols which are located in this file.
1357    They are all chained on partial symtab lists.
1358
1359    Even after the source file has been read into a symtab, the
1360    partial_symtab remains around.  They are allocated on an obstack,
1361    objfile_obstack.  */
1362
1363 static ctf_psymtab *
1364 create_partial_symtab (const char *name,
1365                        ctf_dict_t *cfp,
1366                        psymtab_storage *partial_symtabs,
1367                        struct objfile *objfile)
1368 {
1369   ctf_psymtab *pst;
1370   struct ctf_context *ccx;
1371
1372   pst = new ctf_psymtab (name, partial_symtabs, objfile, 0);
1373
1374   ccx = XOBNEW (&objfile->objfile_obstack, struct ctf_context);
1375   ccx->fp = cfp;
1376   ccx->of = objfile;
1377   ccx->partial_symtabs = partial_symtabs;
1378   ccx->pst = pst;
1379   ccx->builder = nullptr;
1380   pst->context = ccx;
1381
1382   return pst;
1383 }
1384
1385 /* Callback to add type TID to partial symbol table.  */
1386
1387 static int
1388 ctf_psymtab_type_cb (ctf_id_t tid, void *arg)
1389 {
1390   struct ctf_context *ccp;
1391   uint32_t kind;
1392   short section = -1;
1393
1394   ccp = (struct ctf_context *) arg;
1395   gdb::unique_xmalloc_ptr<char> name (ctf_type_aname_raw (ccp->fp, tid));
1396
1397   domain_enum domain = UNDEF_DOMAIN;
1398   enum address_class aclass = LOC_UNDEF;
1399   kind = ctf_type_kind (ccp->fp, tid);
1400   switch (kind)
1401     {
1402       case CTF_K_ENUM:
1403         ctf_psymtab_add_enums (ccp, tid);
1404         /* FALL THROUGH */
1405       case CTF_K_STRUCT:
1406       case CTF_K_UNION:
1407         domain = STRUCT_DOMAIN;
1408         aclass = LOC_TYPEDEF;
1409         break;
1410       case CTF_K_FUNCTION:
1411       case CTF_K_FORWARD:
1412         domain = VAR_DOMAIN;
1413         aclass = LOC_STATIC;
1414         section = SECT_OFF_TEXT (ccp->of);
1415         break;
1416       case CTF_K_CONST:
1417         domain = VAR_DOMAIN;
1418         aclass = LOC_STATIC;
1419         break;
1420       case CTF_K_TYPEDEF:
1421       case CTF_K_POINTER:
1422       case CTF_K_VOLATILE:
1423       case CTF_K_RESTRICT:
1424         domain = VAR_DOMAIN;
1425         aclass = LOC_TYPEDEF;
1426         break;
1427       case CTF_K_INTEGER:
1428       case CTF_K_FLOAT:
1429         domain = VAR_DOMAIN;
1430         aclass = LOC_TYPEDEF;
1431         break;
1432       case CTF_K_ARRAY:
1433       case CTF_K_UNKNOWN:
1434         return 0;
1435     }
1436
1437   if (name == nullptr || strlen (name.get ()) == 0)
1438     return 0;
1439
1440   ccp->pst->add_psymbol (name.get (), true,
1441                          domain, aclass, section,
1442                          psymbol_placement::GLOBAL,
1443                          0, language_c, ccp->partial_symtabs, ccp->of);
1444
1445   return 0;
1446 }
1447
1448 /* Callback to add variable NAME with ID to partial symbol table.  */
1449
1450 static int
1451 ctf_psymtab_var_cb (const char *name, ctf_id_t id, void *arg)
1452 {
1453   struct ctf_context *ccp = (struct ctf_context *) arg;
1454
1455   ccp->pst->add_psymbol (name, true,
1456                          VAR_DOMAIN, LOC_STATIC, -1,
1457                          psymbol_placement::GLOBAL,
1458                          0, language_c, ccp->partial_symtabs, ccp->of);
1459   return 0;
1460 }
1461
1462 /* Setup partial_symtab's describing each source file for which
1463    debugging information is available.  */
1464
1465 static void
1466 scan_partial_symbols (ctf_dict_t *cfp, psymtab_storage *partial_symtabs,
1467                       struct objfile *of)
1468 {
1469   bfd *abfd = of->obfd;
1470   const char *name = bfd_get_filename (abfd);
1471   ctf_psymtab *pst = create_partial_symtab (name, cfp, partial_symtabs, of);
1472
1473   struct ctf_context *ccx = pst->context;
1474
1475   if (ctf_type_iter (cfp, ctf_psymtab_type_cb, ccx) == CTF_ERR)
1476     complaint (_("ctf_type_iter scan_partial_symbols failed - %s"),
1477                ctf_errmsg (ctf_errno (cfp)));
1478
1479   if (ctf_variable_iter (cfp, ctf_psymtab_var_cb, ccx) == CTF_ERR)
1480     complaint (_("ctf_variable_iter scan_partial_symbols failed - %s"),
1481                ctf_errmsg (ctf_errno (cfp)));
1482
1483   /* Scan CTF object and function sections which correspond to each
1484      STT_FUNC or STT_OBJECT entry in the symbol table,
1485      pick up what init_symtab has done.  */
1486   for (unsigned long idx = 0; ; idx++)
1487     {
1488       ctf_id_t tid;
1489       if ((tid = ctf_lookup_by_symbol (cfp, idx)) == CTF_ERR)
1490         {
1491         if (ctf_errno (cfp) == EINVAL || ctf_errno (cfp) == ECTF_NOSYMTAB)
1492           break;        // Done, reach end of the section.
1493         else
1494           continue;
1495         }
1496       gdb::unique_xmalloc_ptr<char> tname (ctf_type_aname_raw (cfp, tid));
1497       uint32_t kind = ctf_type_kind (cfp, tid);
1498       address_class aclass;
1499       domain_enum tdomain;
1500       switch (kind)
1501         {
1502           case CTF_K_STRUCT:
1503           case CTF_K_UNION:
1504           case CTF_K_ENUM:
1505             tdomain = STRUCT_DOMAIN;
1506             break;
1507           default:
1508             tdomain = VAR_DOMAIN;
1509             break;
1510         }
1511
1512       if (kind == CTF_K_FUNCTION)
1513         aclass = LOC_STATIC;
1514       else if (kind == CTF_K_CONST)
1515         aclass = LOC_CONST;
1516       else
1517         aclass = LOC_TYPEDEF;
1518
1519       pst->add_psymbol (tname.get (), true,
1520                         tdomain, aclass, -1,
1521                         psymbol_placement::STATIC,
1522                         0, language_c, partial_symtabs, of);
1523     }
1524
1525   pst->end ();
1526 }
1527
1528 /* Read CTF debugging information from a BFD section.  This is
1529    called from elfread.c.  It does a quick pass through the
1530    .ctf section to set up the partial symbol table.  */
1531
1532 void
1533 elfctf_build_psymtabs (struct objfile *of)
1534 {
1535   bfd *abfd = of->obfd;
1536   int err;
1537
1538   ctf_archive_t *arc = ctf_bfdopen (abfd, &err);
1539   if (arc == nullptr)
1540     error (_("ctf_bfdopen failed on %s - %s"),
1541            bfd_get_filename (abfd), ctf_errmsg (err));
1542
1543   ctf_dict_t *fp = ctf_dict_open (arc, NULL, &err);
1544   if (fp == nullptr)
1545     error (_("ctf_dict_open failed on %s - %s"),
1546            bfd_get_filename (abfd), ctf_errmsg (err));
1547   ctf_dict_key.emplace (of, fp);
1548
1549   psymbol_functions *psf = new psymbol_functions ();
1550   psymtab_storage *partial_symtabs = psf->get_partial_symtabs ().get ();
1551   of->qf.emplace_front (psf);
1552   scan_partial_symbols (fp, partial_symtabs, of);
1553 }
1554
1555 #else
1556
1557 void
1558 elfctf_build_psymtabs (struct objfile *of)
1559 {
1560   /* Nothing to do if CTF is disabled.  */
1561 }
1562
1563 #endif /* ENABLE_LIBCTF */