* dwarf2read.c (struct dwarf2_per_objfile) <dwz_file>: New field.

	(struct dwarf2_per_cu_data) <length>: No longer bitfield.
	<is_dwz>: New field.
	(struct dwz_file): New.
	(struct partial_die_info) <is_dwz, spec_is_dwz>: New fields.
	(locate_dwz_sections, dwarf2_get_dwz_file)
	(get_abbrev_section_for_cu): New functions.
	(error_check_comp_unit_head, read_and_check_comp_unit_head)
	(read_and_check_type_unit_head): Add abbrev_section argument.
	(create_debug_types_hash_table): Update.
	(init_cutu_and_read_dies): Use proper abbrev section.
	(init_cutu_and_read_dies_no_follow): Likewise.
	(set_partial_user): Do nothing if PST==NULL.
	(read_comp_units_from_section): New function.
	(create_all_comp_units): Use it.
	(scan_partial_symbols, partial_die_parent_scope): Update.
	(skip_one_die): Handle DW_FORM_GNU_ref_alt, DW_FORM_GNU_strp_alt.
	(process_imported_unit_die, read_partial_die): Handle .dwz files.
	(find_partial_die): Add offset_in_dwz argument.  Update.
	(guess_partial_die_structure_name, fixup_partial_die): Update.
	(read_attribute_value): Handle DW_FORM_GNU_ref_alt,
	DW_FORM_GNU_strp_alt.
	(read_indirect_string_from_dwz): New function.
	(dwarf2_const_value_attr): Handle DW_FORM_GNU_strp_alt.
	(dump_die_shallow): Handle DW_FORM_GNU_ref_alt, DW_FORM_GNU_strp_alt.
	(is_ref_attr): Handle DW_FORM_GNU_ref_alt.
	(follow_die_offset): Add offset_in_dwz argument.
	(follow_die_ref, dwarf2_fetch_die_location_block): Update.
	(skip_form_bytes): Handle DW_FORM_GNU_strp_alt.
	(dwarf_decode_macro_bytes): Add section_is_dwz argument.
	Handle new macro forms.
	(dwarf_decode_macros): Update.
	(dwarf2_find_containing_comp_unit): Add offset_in_dwz argument.
	(dwarf2_per_objfile_free): Unref dwz_bfd, if it exists
	(lookup_die_type): Handle DW_FORM_GNU_ref_alt.
	(create_debug_types_hash_table): Use correct abbrev section.
	(get_debug_line_section): New function.
	(dwarf_decode_line_header, dwarf_decode_lines_1): Use it.
	(process_full_comp_unit): Pass 'required' argument to
	end_symtab_get_static_block.
	* buildsym.h (end_symtab_get_static_block): Update.
	* buildsym.c (end_symtab_get_static_block): Add 'required'
	argument.
	(end_symtab, end_expandable_symtab): Update.

1 files changed, 9 insertions, 5 deletions

diff --git a/gdb/buildsym.c b/gdb/buildsym.c
index d547012..e4882fb 100644
--- a/gdb/buildsym.c
+++ b/gdb/buildsym.c
@@ -966,11 +966,14 @@ reset_symtab_globals (void)
    file's text.
 
    If EXPANDABLE is non-zero the STATIC_BLOCK dictionary is made
-   expandable.  */
+   expandable.
+
+   If REQUIRED is non-zero, then a symtab is created even if it does
+   not contain any symbols.  */
 
 struct block *
 end_symtab_get_static_block (CORE_ADDR end_addr, struct objfile *objfile,
-			     int expandable)
+			     int expandable, int required)
 {
   /* Finish the lexical context of the last function in the file; pop
      the context stack.  */
@@ -1038,7 +1041,8 @@ end_symtab_get_static_block (CORE_ADDR end_addr, struct objfile *objfile,
   cleanup_undefined_stabs_types (objfile);
   finish_global_stabs (objfile);
 
-  if (pending_blocks == NULL
+  if (!required
+      && pending_blocks == NULL
       && file_symbols == NULL
       && global_symbols == NULL
       && have_line_numbers == 0
@@ -1296,7 +1300,7 @@ end_symtab (CORE_ADDR end_addr, struct objfile *objfile, int section)
 {
   struct block *static_block;
 
-  static_block = end_symtab_get_static_block (end_addr, objfile, 0);
+  static_block = end_symtab_get_static_block (end_addr, objfile, 0, 0);
   return end_symtab_from_static_block (static_block, objfile, section, 0);
 }
 
@@ -1308,7 +1312,7 @@ end_expandable_symtab (CORE_ADDR end_addr, struct objfile *objfile,
 {
   struct block *static_block;
 
-  static_block = end_symtab_get_static_block (end_addr, objfile, 1);
+  static_block = end_symtab_get_static_block (end_addr, objfile, 1, 0);
   return end_symtab_from_static_block (static_block, objfile, section, 1);
 }