PR symtab/12984:
* dwarf2read.c (dwarf2_section_info_def): New typedef. (struct dwarf2_per_objfile) <types>: Change to a VEC. (struct dwarf2_per_cu_data) <from_debug_types>: Remove. <debug_type_section>: New field. (dwarf2_locate_sections): Push .debug_types sections onto VEC. (load_cu): Use appropriate section. (create_signatured_type_table_from_index): Add 'section' argument. (dwarf2_read_index): Only allow a single .debug_types section. (dw2_get_file_names): Use appropriate section. (read_type_comp_unit_head): Add 'section' argument. (create_debug_types_hash_table): Loop over all .debug_types sections. (init_cu_die_reader): Use appropriate section. (process_psymtab_comp_unit, load_partial_comp_unit) (load_full_comp_unit, read_die_and_children, find_partial_die) (lookup_die_type, determine_prefix, follow_die_offset): Update. (lookup_signatured_type_at_offset): Add 'section' argument. (read_signatured_type_at_offset): Add 'sect' argument. (read_signatured_type): Use appropriate section. (set_die_type, get_die_type_at_offset): Update. (dwarf2_per_objfile_free): Free all .debug_types sections, and VEC. (write_psymtabs_to_index): Don't allow index with more than one .debug_types section.
This commit is contained in:
parent
2275a1a744
commit
8b70b953ba
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@ -1,3 +1,32 @@
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2011-07-20 Tom Tromey <tromey@redhat.com>
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PR symtab/12984:
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* dwarf2read.c (dwarf2_section_info_def): New typedef.
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(struct dwarf2_per_objfile) <types>: Change to a VEC.
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(struct dwarf2_per_cu_data) <from_debug_types>: Remove.
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<debug_type_section>: New field.
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(dwarf2_locate_sections): Push .debug_types sections onto VEC.
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(load_cu): Use appropriate section.
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(create_signatured_type_table_from_index): Add 'section'
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argument.
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(dwarf2_read_index): Only allow a single .debug_types section.
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(dw2_get_file_names): Use appropriate section.
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(read_type_comp_unit_head): Add 'section' argument.
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(create_debug_types_hash_table): Loop over all .debug_types
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sections.
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(init_cu_die_reader): Use appropriate section.
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(process_psymtab_comp_unit, load_partial_comp_unit)
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(load_full_comp_unit, read_die_and_children, find_partial_die)
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(lookup_die_type, determine_prefix, follow_die_offset): Update.
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(lookup_signatured_type_at_offset): Add 'section' argument.
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(read_signatured_type_at_offset): Add 'sect' argument.
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(read_signatured_type): Use appropriate section.
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(set_die_type, get_die_type_at_offset): Update.
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(dwarf2_per_objfile_free): Free all .debug_types sections, and
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VEC.
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(write_psymtabs_to_index): Don't allow index with more than one
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.debug_types section.
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2011-07-19 Jan Kratochvil <jan.kratochvil@redhat.com>
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Fix crash if referenced CU is aged out.
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176
gdb/dwarf2read.c
176
gdb/dwarf2read.c
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@ -145,6 +145,9 @@ struct dwarf2_section_info
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int readin;
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};
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typedef struct dwarf2_section_info dwarf2_section_info_def;
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DEF_VEC_O (dwarf2_section_info_def);
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/* All offsets in the index are of this type. It must be
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architecture-independent. */
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typedef uint32_t offset_type;
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@ -186,11 +189,12 @@ struct dwarf2_per_objfile
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struct dwarf2_section_info macinfo;
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struct dwarf2_section_info str;
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struct dwarf2_section_info ranges;
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struct dwarf2_section_info types;
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struct dwarf2_section_info frame;
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struct dwarf2_section_info eh_frame;
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struct dwarf2_section_info gdb_index;
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VEC (dwarf2_section_info_def) *types;
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/* Back link. */
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struct objfile *objfile;
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@ -447,9 +451,9 @@ struct dwarf2_per_cu_data
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hash table and don't find it. */
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unsigned int load_all_dies : 1;
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/* Non-zero if this CU is from .debug_types.
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Otherwise it's from .debug_info. */
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unsigned int from_debug_types : 1;
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/* Non-null if this CU is from .debug_types; in which case it points
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to the section. Otherwise it's from .debug_info. */
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struct dwarf2_section_info *debug_type_section;
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/* Set to non-NULL iff this CU is currently loaded. When it gets freed out
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of the CU cache it gets reset to NULL again. */
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@ -1204,6 +1208,7 @@ static struct die_info *follow_die_sig (struct die_info *,
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struct dwarf2_cu **);
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static void read_signatured_type_at_offset (struct objfile *objfile,
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struct dwarf2_section_info *sect,
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unsigned int offset);
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static void read_signatured_type (struct objfile *,
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@ -1455,8 +1460,14 @@ dwarf2_locate_sections (bfd *abfd, asection *sectp, void *vnames)
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}
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else if (section_is_p (sectp->name, &names->types))
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{
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dwarf2_per_objfile->types.asection = sectp;
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dwarf2_per_objfile->types.size = bfd_get_section_size (sectp);
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struct dwarf2_section_info type_section;
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memset (&type_section, 0, sizeof (type_section));
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type_section.asection = sectp;
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type_section.size = bfd_get_section_size (sectp);
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VEC_safe_push (dwarf2_section_info_def, dwarf2_per_objfile->types,
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&type_section);
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}
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else if (section_is_p (sectp->name, &names->gdb_index))
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{
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@ -1798,8 +1809,10 @@ create_quick_file_names_table (unsigned int nr_initial_entries)
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static void
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load_cu (struct dwarf2_per_cu_data *per_cu)
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{
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if (per_cu->from_debug_types)
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read_signatured_type_at_offset (per_cu->objfile, per_cu->offset);
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if (per_cu->debug_type_section)
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read_signatured_type_at_offset (per_cu->objfile,
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per_cu->debug_type_section,
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per_cu->offset);
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else
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load_full_comp_unit (per_cu, per_cu->objfile);
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@ -1929,6 +1942,7 @@ create_cus_from_index (struct objfile *objfile, const gdb_byte *cu_list,
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static int
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create_signatured_type_table_from_index (struct objfile *objfile,
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struct dwarf2_section_info *section,
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const gdb_byte *bytes,
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offset_type elements)
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{
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@ -1959,7 +1973,7 @@ create_signatured_type_table_from_index (struct objfile *objfile,
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struct signatured_type);
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type_sig->signature = signature;
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type_sig->type_offset = type_offset;
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type_sig->per_cu.from_debug_types = 1;
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type_sig->per_cu.debug_type_section = section;
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type_sig->per_cu.offset = offset;
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type_sig->per_cu.objfile = objfile;
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type_sig->per_cu.v.quick
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@ -2187,10 +2201,23 @@ dwarf2_read_index (struct objfile *objfile)
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if (!create_cus_from_index (objfile, cu_list, cu_list_elements))
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return 0;
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if (types_list_elements
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&& !create_signatured_type_table_from_index (objfile, types_list,
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if (types_list_elements)
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{
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struct dwarf2_section_info *section;
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/* We can only handle a single .debug_types when we have an
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index. */
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if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1)
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return 0;
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section = VEC_index (dwarf2_section_info_def,
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dwarf2_per_objfile->types, 0);
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if (!create_signatured_type_table_from_index (objfile, section,
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types_list,
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types_list_elements))
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return 0;
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}
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create_addrmap_from_index (objfile, map);
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init_one_comp_unit (&cu, objfile);
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cleanups = make_cleanup (free_stack_comp_unit, &cu);
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if (this_cu->from_debug_types)
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sec = &dwarf2_per_objfile->types;
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if (this_cu->debug_type_section)
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sec = this_cu->debug_type_section;
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else
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sec = &dwarf2_per_objfile->info;
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dwarf2_read_section (objfile, sec);
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dwarf2_read_abbrevs (abfd, &cu);
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make_cleanup (dwarf2_free_abbrev_table, &cu);
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if (this_cu->from_debug_types)
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if (this_cu->debug_type_section)
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info_ptr += 8 /*signature*/ + cu.header.offset_size;
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init_cu_die_reader (&reader_specs, &cu);
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read_full_die (&reader_specs, &comp_unit_die, info_ptr,
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@ -2936,14 +2963,14 @@ partial_read_comp_unit_head (struct comp_unit_head *header, gdb_byte *info_ptr,
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static gdb_byte *
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read_type_comp_unit_head (struct comp_unit_head *cu_header,
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struct dwarf2_section_info *section,
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ULONGEST *signature,
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gdb_byte *types_ptr, bfd *abfd)
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{
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gdb_byte *initial_types_ptr = types_ptr;
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dwarf2_read_section (dwarf2_per_objfile->objfile,
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&dwarf2_per_objfile->types);
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cu_header->offset = types_ptr - dwarf2_per_objfile->types.buffer;
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dwarf2_read_section (dwarf2_per_objfile->objfile, section);
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cu_header->offset = types_ptr - section->buffer;
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types_ptr = read_comp_unit_head (cu_header, types_ptr, abfd);
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@ -3071,26 +3098,38 @@ add_signatured_type_cu_to_list (void **slot, void *datum)
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static int
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create_debug_types_hash_table (struct objfile *objfile)
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{
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gdb_byte *info_ptr;
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htab_t types_htab;
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htab_t types_htab = NULL;
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struct dwarf2_per_cu_data **iter;
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int ix;
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struct dwarf2_section_info *section;
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dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
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info_ptr = dwarf2_per_objfile->types.buffer;
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if (info_ptr == NULL)
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if (VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types))
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{
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dwarf2_per_objfile->signatured_types = NULL;
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return 0;
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}
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for (ix = 0;
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VEC_iterate (dwarf2_section_info_def, dwarf2_per_objfile->types,
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ix, section);
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++ix)
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{
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gdb_byte *info_ptr, *end_ptr;
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dwarf2_read_section (objfile, section);
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info_ptr = section->buffer;
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if (info_ptr == NULL)
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continue;
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if (types_htab == NULL)
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types_htab = allocate_signatured_type_table (objfile);
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if (dwarf2_die_debug)
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fprintf_unfiltered (gdb_stdlog, "Signatured types:\n");
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while (info_ptr < dwarf2_per_objfile->types.buffer
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+ dwarf2_per_objfile->types.size)
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end_ptr = info_ptr + section->size;
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while (info_ptr < end_ptr)
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{
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unsigned int offset;
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unsigned int offset_size;
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void **slot;
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gdb_byte *ptr = info_ptr;
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offset = ptr - dwarf2_per_objfile->types.buffer;
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offset = ptr - section->buffer;
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/* We need to read the type's signature in order to build the hash
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table, but we don't need to read anything else just yet. */
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/* Sanity check to ensure entire cu is present. */
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length = read_initial_length (objfile->obfd, ptr, &initial_length_size);
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if (ptr + length + initial_length_size
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> dwarf2_per_objfile->types.buffer + dwarf2_per_objfile->types.size)
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length = read_initial_length (objfile->obfd, ptr,
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&initial_length_size);
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if (ptr + length + initial_length_size > end_ptr)
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{
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complaint (&symfile_complaints,
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_("debug type entry runs off end "
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type_sig->signature = signature;
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type_sig->type_offset = type_offset;
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type_sig->per_cu.objfile = objfile;
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type_sig->per_cu.from_debug_types = 1;
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type_sig->per_cu.debug_type_section = section;
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type_sig->per_cu.offset = offset;
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slot = htab_find_slot (types_htab, type_sig, INSERT);
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@ -3157,6 +3196,7 @@ create_debug_types_hash_table (struct objfile *objfile)
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info_ptr = info_ptr + initial_length_size + length;
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}
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}
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dwarf2_per_objfile->signatured_types = types_htab;
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@ -3201,10 +3241,10 @@ init_cu_die_reader (struct die_reader_specs *reader,
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{
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reader->abfd = cu->objfile->obfd;
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reader->cu = cu;
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if (cu->per_cu->from_debug_types)
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if (cu->per_cu->debug_type_section)
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{
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gdb_assert (dwarf2_per_objfile->types.readin);
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reader->buffer = dwarf2_per_objfile->types.buffer;
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gdb_assert (cu->per_cu->debug_type_section->readin);
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reader->buffer = cu->per_cu->debug_type_section->buffer;
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}
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else
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{
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@ -3305,13 +3345,13 @@ process_psymtab_comp_unit (struct objfile *objfile,
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make_cleanup (dwarf2_free_abbrev_table, &cu);
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/* Read the compilation unit die. */
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if (this_cu->from_debug_types)
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if (this_cu->debug_type_section)
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info_ptr += 8 /*signature*/ + cu.header.offset_size;
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init_cu_die_reader (&reader_specs, &cu);
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info_ptr = read_full_die (&reader_specs, &comp_unit_die, info_ptr,
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&has_children);
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if (this_cu->from_debug_types)
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if (this_cu->debug_type_section)
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{
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/* LENGTH has not been set yet for type units. */
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gdb_assert (this_cu->offset == cu.header.offset);
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@ -3407,7 +3447,7 @@ process_psymtab_comp_unit (struct objfile *objfile,
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info_ptr = (beg_of_comp_unit + cu.header.length
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+ cu.header.initial_length_size);
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if (this_cu->from_debug_types)
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if (this_cu->debug_type_section)
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{
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/* It's not clear we want to do anything with stmt lists here.
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Waiting to see what gcc ultimately does. */
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@ -3436,11 +3476,12 @@ process_type_comp_unit (void **slot, void *info)
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this_cu = &entry->per_cu;
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gdb_assert (dwarf2_per_objfile->types.readin);
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gdb_assert (this_cu->debug_type_section->readin);
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process_psymtab_comp_unit (objfile, this_cu,
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dwarf2_per_objfile->types.buffer,
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dwarf2_per_objfile->types.buffer + this_cu->offset,
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dwarf2_per_objfile->types.size);
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this_cu->debug_type_section->buffer,
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(this_cu->debug_type_section->buffer
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+ this_cu->offset),
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this_cu->debug_type_section->size);
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return 1;
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}
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@ -3549,7 +3590,7 @@ load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu,
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struct die_reader_specs reader_specs;
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int read_cu = 0;
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gdb_assert (! this_cu->from_debug_types);
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gdb_assert (! this_cu->debug_type_section);
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gdb_assert (dwarf2_per_objfile->info.readin);
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info_ptr = dwarf2_per_objfile->info.buffer + this_cu->offset;
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@ -4548,7 +4589,7 @@ load_full_comp_unit (struct dwarf2_per_cu_data *per_cu,
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struct attribute *attr;
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int read_cu = 0;
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gdb_assert (! per_cu->from_debug_types);
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gdb_assert (! per_cu->debug_type_section);
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/* Set local variables from the partial symbol table info. */
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offset = per_cu->offset;
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@ -8790,11 +8831,9 @@ read_die_and_children (const struct die_reader_specs *reader,
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{
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fprintf_unfiltered (gdb_stdlog,
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"\nRead die from %s of %s:\n",
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reader->buffer == dwarf2_per_objfile->info.buffer
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? ".debug_info"
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: reader->buffer == dwarf2_per_objfile->types.buffer
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(reader->cu->per_cu->debug_type_section
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? ".debug_types"
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: "unknown section",
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: ".debug_info"),
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reader->abfd->filename);
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dump_die (result, dwarf2_die_debug);
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}
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@ -9580,7 +9619,7 @@ find_partial_die (unsigned int offset, struct dwarf2_cu *cu)
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struct dwarf2_per_cu_data *per_cu = NULL;
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struct partial_die_info *pd = NULL;
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if (cu->per_cu->from_debug_types)
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if (cu->per_cu->debug_type_section)
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{
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pd = find_partial_die_in_comp_unit (offset, cu);
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if (pd != NULL)
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@ -9743,7 +9782,7 @@ fixup_partial_die (struct partial_die_info *part_die,
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NOTE: We need to do this even if cu->has_namespace_info != 0.
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gcc-4.5 -gdwarf-4 can drop the enclosing namespace. */
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if (cu->language == language_cplus
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&& dwarf2_per_objfile->types.asection != NULL
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&& !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types)
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&& part_die->die_parent == NULL
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&& part_die->has_children
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&& (part_die->tag == DW_TAG_class_type
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@ -11920,7 +11959,7 @@ lookup_die_type (struct die_info *die, struct attribute *attr,
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"at 0x%x [in module %s]"),
|
||||
die->offset, cu->objfile->name);
|
||||
|
||||
gdb_assert (sig_type->per_cu.from_debug_types);
|
||||
gdb_assert (sig_type->per_cu.debug_type_section);
|
||||
offset = sig_type->per_cu.offset + sig_type->type_offset;
|
||||
this_type = get_die_type_at_offset (offset, &sig_type->per_cu);
|
||||
}
|
||||
|
@ -12262,7 +12301,7 @@ determine_prefix (struct die_info *die, struct dwarf2_cu *cu)
|
|||
case DW_TAG_compile_unit:
|
||||
/* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
|
||||
if (cu->language == language_cplus
|
||||
&& dwarf2_per_objfile->types.asection != NULL
|
||||
&& !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types)
|
||||
&& die->child != NULL
|
||||
&& (die->tag == DW_TAG_class_type
|
||||
|| die->tag == DW_TAG_structure_type
|
||||
|
@ -13774,7 +13813,7 @@ follow_die_offset (unsigned int offset, struct dwarf2_cu **ref_cu)
|
|||
|
||||
target_cu = cu;
|
||||
|
||||
if (cu->per_cu->from_debug_types)
|
||||
if (cu->per_cu->debug_type_section)
|
||||
{
|
||||
/* .debug_types CUs cannot reference anything outside their CU.
|
||||
If they need to, they have to reference a signatured type via
|
||||
|
@ -13949,9 +13988,11 @@ follow_die_sig (struct die_info *src_die, struct attribute *attr,
|
|||
/* Given an offset of a signatured type, return its signatured_type. */
|
||||
|
||||
static struct signatured_type *
|
||||
lookup_signatured_type_at_offset (struct objfile *objfile, unsigned int offset)
|
||||
lookup_signatured_type_at_offset (struct objfile *objfile,
|
||||
struct dwarf2_section_info *section,
|
||||
unsigned int offset)
|
||||
{
|
||||
gdb_byte *info_ptr = dwarf2_per_objfile->types.buffer + offset;
|
||||
gdb_byte *info_ptr = section->buffer + offset;
|
||||
unsigned int length, initial_length_size;
|
||||
unsigned int sig_offset;
|
||||
struct signatured_type find_entry, *type_sig;
|
||||
|
@ -13976,15 +14017,16 @@ lookup_signatured_type_at_offset (struct objfile *objfile, unsigned int offset)
|
|||
|
||||
static void
|
||||
read_signatured_type_at_offset (struct objfile *objfile,
|
||||
struct dwarf2_section_info *sect,
|
||||
unsigned int offset)
|
||||
{
|
||||
struct signatured_type *type_sig;
|
||||
|
||||
dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
|
||||
dwarf2_read_section (objfile, sect);
|
||||
|
||||
/* We have the section offset, but we need the signature to do the
|
||||
hash table lookup. */
|
||||
type_sig = lookup_signatured_type_at_offset (objfile, offset);
|
||||
type_sig = lookup_signatured_type_at_offset (objfile, sect, offset);
|
||||
|
||||
gdb_assert (type_sig->per_cu.cu == NULL);
|
||||
|
||||
|
@ -14004,9 +14046,10 @@ read_signatured_type (struct objfile *objfile,
|
|||
struct dwarf2_cu *cu;
|
||||
ULONGEST signature;
|
||||
struct cleanup *back_to, *free_cu_cleanup;
|
||||
struct dwarf2_section_info *section = type_sig->per_cu.debug_type_section;
|
||||
|
||||
dwarf2_read_section (objfile, &dwarf2_per_objfile->types);
|
||||
types_ptr = dwarf2_per_objfile->types.buffer + type_sig->per_cu.offset;
|
||||
dwarf2_read_section (objfile, section);
|
||||
types_ptr = section->buffer + type_sig->per_cu.offset;
|
||||
|
||||
gdb_assert (type_sig->per_cu.cu == NULL);
|
||||
|
||||
|
@ -14019,7 +14062,7 @@ read_signatured_type (struct objfile *objfile,
|
|||
/* If an error occurs while loading, release our storage. */
|
||||
free_cu_cleanup = make_cleanup (free_one_comp_unit, cu);
|
||||
|
||||
types_ptr = read_type_comp_unit_head (&cu->header, &signature,
|
||||
types_ptr = read_type_comp_unit_head (&cu->header, section, &signature,
|
||||
types_ptr, objfile->obfd);
|
||||
gdb_assert (signature == type_sig->signature);
|
||||
|
||||
|
@ -15387,7 +15430,7 @@ set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
|
|||
&& !HAVE_GNAT_AUX_INFO (type))
|
||||
INIT_GNAT_SPECIFIC (type);
|
||||
|
||||
if (cu->per_cu->from_debug_types)
|
||||
if (cu->per_cu->debug_type_section)
|
||||
type_hash_ptr = &dwarf2_per_objfile->debug_types_type_hash;
|
||||
else
|
||||
type_hash_ptr = &dwarf2_per_objfile->debug_info_type_hash;
|
||||
|
@ -15427,7 +15470,7 @@ get_die_type_at_offset (unsigned int offset,
|
|||
struct dwarf2_offset_and_type *slot, ofs;
|
||||
htab_t type_hash;
|
||||
|
||||
if (per_cu->from_debug_types)
|
||||
if (per_cu->debug_type_section)
|
||||
type_hash = dwarf2_per_objfile->debug_types_type_hash;
|
||||
else
|
||||
type_hash = dwarf2_per_objfile->debug_info_type_hash;
|
||||
|
@ -15584,6 +15627,8 @@ static void
|
|||
dwarf2_per_objfile_free (struct objfile *objfile, void *d)
|
||||
{
|
||||
struct dwarf2_per_objfile *data = d;
|
||||
int ix;
|
||||
struct dwarf2_section_info *section;
|
||||
|
||||
/* This is sorted according to the order they're defined in to make it easier
|
||||
to keep in sync. */
|
||||
|
@ -15594,10 +15639,16 @@ dwarf2_per_objfile_free (struct objfile *objfile, void *d)
|
|||
munmap_section_buffer (&data->macinfo);
|
||||
munmap_section_buffer (&data->str);
|
||||
munmap_section_buffer (&data->ranges);
|
||||
munmap_section_buffer (&data->types);
|
||||
munmap_section_buffer (&data->frame);
|
||||
munmap_section_buffer (&data->eh_frame);
|
||||
munmap_section_buffer (&data->gdb_index);
|
||||
|
||||
for (ix = 0;
|
||||
VEC_iterate (dwarf2_section_info_def, data->types, ix, section);
|
||||
++ix)
|
||||
munmap_section_buffer (section);
|
||||
|
||||
VEC_free (dwarf2_section_info_def, data->types);
|
||||
}
|
||||
|
||||
|
||||
|
@ -16185,6 +16236,9 @@ write_psymtabs_to_index (struct objfile *objfile, const char *dir)
|
|||
if (dwarf2_per_objfile->using_index)
|
||||
error (_("Cannot use an index to create the index"));
|
||||
|
||||
if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1)
|
||||
error (_("Cannot make an index when the file has multiple .debug_types sections"));
|
||||
|
||||
if (stat (objfile->name, &st) < 0)
|
||||
perror_with_name (objfile->name);
|
||||
|
||||
|
|
Loading…
Reference in New Issue