gdb/dwarf2/cu.c

   1 /* DWARF CU data structure
   2
   3    Copyright (C) 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 #include "defs.h"
  21 #include "dwarf2/cu.h"
  22 #include "dwarf2/read.h"
  23
  24 /* Initialize dwarf2_cu to read PER_CU, in the context of PER_OBJFILE.  */
  25
  26 dwarf2_cu::dwarf2_cu (dwarf2_per_cu_data *per_cu,
  27                       dwarf2_per_objfile *per_objfile)
  28   : per_cu (per_cu),
  29     per_objfile (per_objfile),
  30     mark (false),
  31     has_loclist (false),
  32     checked_producer (false),
  33     producer_is_gxx_lt_4_6 (false),
  34     producer_is_gcc_lt_4_3 (false),
  35     producer_is_icc (false),
  36     producer_is_icc_lt_14 (false),
  37     producer_is_codewarrior (false),
  38     processing_has_namespace_info (false)
  39 {
  40 }
  41
  42 /* See cu.h.  */
  43
  44 struct type *
  45 dwarf2_cu::addr_sized_int_type (bool unsigned_p) const
  46 {
  47   int addr_size = this->per_cu->addr_size ();
  48   return this->per_objfile->int_type (addr_size, unsigned_p);
  49 }
  50
  51 /* Start a symtab for DWARF.  NAME, COMP_DIR, LOW_PC are passed to the
  52    buildsym_compunit constructor.  */
  53
  54 struct compunit_symtab *
  55 dwarf2_cu::start_symtab (const char *name, const char *comp_dir,
  56                          CORE_ADDR low_pc)
  57 {
  58   gdb_assert (m_builder == nullptr);
  59
  60   m_builder.reset (new struct buildsym_compunit
  61                    (this->per_objfile->objfile,
  62                     name, comp_dir, language, low_pc));
  63
  64   list_in_scope = get_builder ()->get_file_symbols ();
  65
  66   get_builder ()->record_debugformat ("DWARF 2");
  67   get_builder ()->record_producer (producer);
  68
  69   processing_has_namespace_info = false;
  70
  71   return get_builder ()->get_compunit_symtab ();
  72 }
  73
  74 /* See read.h.  */
  75
  76 struct type *
  77 dwarf2_cu::addr_type () const
  78 {
  79   struct objfile *objfile = this->per_objfile->objfile;
  80   struct type *void_type = objfile_type (objfile)->builtin_void;
  81   struct type *addr_type = lookup_pointer_type (void_type);
  82   int addr_size = this->per_cu->addr_size ();
  83
  84   if (TYPE_LENGTH (addr_type) == addr_size)
  85     return addr_type;
  86
  87   addr_type = addr_sized_int_type (addr_type->is_unsigned ());
  88   return addr_type;
  89 }