1 /* DWARF CU data structure
3 Copyright (C) 2021-2022 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
21 #include "dwarf2/cu.h"
22 #include "dwarf2/read.h"
24 /* Initialize dwarf2_cu to read PER_CU, in the context of PER_OBJFILE. */
26 dwarf2_cu::dwarf2_cu (dwarf2_per_cu_data *per_cu,
27 dwarf2_per_objfile *per_objfile)
29 per_objfile (per_objfile),
32 checked_producer (false),
33 producer_is_gxx_lt_4_6 (false),
34 producer_is_gcc_lt_4_3 (false),
35 producer_is_gcc_11 (false),
36 producer_is_icc (false),
37 producer_is_icc_lt_14 (false),
38 producer_is_codewarrior (false),
39 processing_has_namespace_info (false),
47 dwarf2_cu::addr_sized_int_type (bool unsigned_p) const
49 int addr_size = this->per_cu->addr_size ();
50 return objfile_int_type (this->per_objfile->objfile, addr_size, unsigned_p);
53 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
54 buildsym_compunit constructor. */
56 struct compunit_symtab *
57 dwarf2_cu::start_symtab (const char *name, const char *comp_dir,
60 gdb_assert (m_builder == nullptr);
62 m_builder.reset (new struct buildsym_compunit
63 (this->per_objfile->objfile,
64 name, comp_dir, per_cu->lang, low_pc));
66 list_in_scope = get_builder ()->get_file_symbols ();
68 /* DWARF versions are restricted to [2, 5], thanks to the check in
69 read_comp_unit_head. */
70 gdb_assert (this->header.version >= 2 && this->header.version <= 5);
71 static const char *debugformat_strings[] = {
77 const char *debugformat = debugformat_strings[this->header.version - 2];
79 get_builder ()->record_debugformat (debugformat);
80 get_builder ()->record_producer (producer);
82 processing_has_namespace_info = false;
84 return get_builder ()->get_compunit_symtab ();
90 dwarf2_cu::addr_type () const
92 struct objfile *objfile = this->per_objfile->objfile;
93 struct type *void_type = objfile_type (objfile)->builtin_void;
94 struct type *addr_type = lookup_pointer_type (void_type);
95 int addr_size = this->per_cu->addr_size ();
97 if (TYPE_LENGTH (addr_type) == addr_size)
100 addr_type = addr_sized_int_type (addr_type->is_unsigned ());
104 /* A hashtab traversal function that marks the dependent CUs. */
107 dwarf2_mark_helper (void **slot, void *data)
109 dwarf2_per_cu_data *per_cu = (dwarf2_per_cu_data *) *slot;
110 dwarf2_per_objfile *per_objfile = (dwarf2_per_objfile *) data;
111 dwarf2_cu *cu = per_objfile->get_cu (per_cu);
113 /* cu->m_dependencies references may not yet have been ever read if
114 QUIT aborts reading of the chain. As such dependencies remain
115 valid it is not much useful to track and undo them during QUIT
122 /* See dwarf2/cu.h. */
130 if (m_dependencies != nullptr)
131 htab_traverse (m_dependencies, dwarf2_mark_helper, per_objfile);
135 /* See dwarf2/cu.h. */
138 dwarf2_cu::add_dependence (struct dwarf2_per_cu_data *ref_per_cu)
142 if (m_dependencies == nullptr)
144 = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer,
145 NULL, &comp_unit_obstack,
146 hashtab_obstack_allocate,
147 dummy_obstack_deallocate);
149 slot = htab_find_slot (m_dependencies, ref_per_cu, INSERT);
150 if (*slot == nullptr)
154 /* See dwarf2/cu.h. */
157 dwarf2_cu::get_builder ()
159 /* If this CU has a builder associated with it, use that. */
160 if (m_builder != nullptr)
161 return m_builder.get ();
163 if (per_objfile->sym_cu != nullptr)
164 return per_objfile->sym_cu->m_builder.get ();
166 gdb_assert_not_reached ("");