[Bug gdb/13498] save-index makes gdb slow with dwarf4

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=13498

--- Comment #11 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> 2012-07-10 20:28:38 UTC ---
CVSROOT:    /cvs/src
Module name:    src
Changes by:    devans@sourceware.org    2012-07-10 20:28:34

Modified files:
    gdb            : ChangeLog dwarf2read.c 

Log message:
    PR gdb/13498
    * dwarf2read.c (dwarf2_per_objfile): New members n_type_unit_groups,
    all_type_unit_groups, type_unit_groups, tu_stats.
    (dwarf2_per_cu_data): Move "imported_symtabs" into new union "s".
    All uses updated.  Add type_unit_group to union "s".
    (type_unit_group): New struct.
    (IS_TYPE_UNIT_GROUP): New macro.
    (abbrev_table): Delete unused member "section".
    (dw2_do_instantiate_symtab): Early exit if type_unit_group.
    (dw2_get_cu): Assert not used with type_unit_group.
    (dw2_get_primary_cu): New function.
    (dw2_build_type_unit_groups_reader): New function.
    (dw2_build_type_unit_groups): New function.
    (dw2_get_file_names): Assert not called on type units.
    (dw2_map_symtabs_matching_filename): Call dw2_build_type_unit_groups.
    Redo loop to iterate over type unit groups instead of type units.
    (dw2_expand_symtabs_matching, dw2_map_symbol_filenames): Ditto.
    (read_abbrev_offset): New function.
    (init_cutu_and_read_dies): New arg "abbrev_table".  All callers
    updated.
    (create_partial_symtab): New function.
    (process_psymtab_comp_unit_reader): Assert not used with type units.
    Call create_partial_symtab.
    (process_psymtab_type_unit): Delete.
    (hash_type_unit_group, eq_type_unit_group): New functions.
    (allocate_type_unit_groups_table): New function.
    (NO_STMT_LIST_TYPE_UNIT_PSYMTAB): New macro.
    (NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE): New macro.
    (create_type_unit_group, get_type_unit_group): New functions.
    (tu_abbrev_offset): New struct.
    (sort_tu_by_abbrev_offset): New function.
    (add_type_unit_group_to_table): New function.
    (build_type_unit_groups): New function.
    (build_type_psymtabs_reader): New function.
    (build_type_psymtab_dependencies): New function.
    (build_type_psymtabs): Rewrite.
    (scan_partial_symbols): Flag an error if a DW_TAG_imported_unit
    is seen in a type unit.
    (process_queue): Move symtab expansion debugging printfs here.
    Call process_full_type_unit for type units.
    (compute_symtab_includes): Assert not called for type units.
    (process_cu_includes): Don't call compute_symtab_includes for
    type units.
    (process_full_type_unit): New function.
    (process_imported_unit_die): Flag an error if called for type units.
    (handle_DW_AT_stmt_list): Delete arg "want_line_info".  All callers
    updated.  Assert not called for type units.
    (read_file_scope): Call dwarf2_start_symtab.
    (setup_type_unit_groups): New function.
    (read_type_unit_scope): Rewrite.
    (abbrev_table_read_table): Initialize abbrev_table->offset.
    (abbrev_table_free_cleanup): New function.
    (dwarf2_start_symtab): New function.
    (load_full_type_unit): Assert not called for type unit groups.

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/ChangeLog.diff?cvsroot=src&r1=1.14457&r2=1.14458
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/dwarf2read.c.diff?cvsroot=src&r1=1.683&r2=1.684

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