gdb
* breakpoint.c (save_cmdlist): No longer static. * gdbcmd.h (save_cmdlist): Declare. * symfile.c (symbol_file_add_with_addrs_or_offsets): Set OBJF_READNOW on objfile if readnow_symbol_files. * elfread.c (elf_symfile_read): Use dwarf2_initialize_objfile. (elf_sym_fns_gdb_index): New global. * dwarf2read.c: Include exceptions.h. (offset_type): New. (struct mapped_index): New. (dwarf2_per_cu_data_ptr): New typedef. (struct dwarf2_per_objfile) <using_index, index_table, gdb_index>: New fields. (GDB_INDEX_SECTION): New define. (struct dwarf2_per_cu_quick_data): New. (struct dwarf2_per_cu_data) <objfile>: New field. <psymtab>: Removed. <v>: New field. (byte_swap): New function. (MAYBE_SWAP): New macro. (INDEX_SUFFIX): New macro. (dw2_do_instantiate_symtab): New function. (dw2_instantiate_symtab): Likewise. (create_cus_from_index): Likewise. (create_addrmap_from_index): Likewise. (mapped_index_string_hash): Likewise. (find_slot_in_mapped_hash): Likewise. (dwarf2_read_index): Likewise. (dw2_setup): Likewise. (dw2_require_line_header): Likewise. (dw2_require_full_path): Likewise. (dw2_find_last_source_symtab): Likewise. (dw2_forget_cached_source_info): Likewise. (dw2_lookup_symtab): Likewise. (dw2_lookup_symbol): Likewise. (dw2_do_expand_symtabs_matching): Likewise. (dw2_pre_expand_symtabs_matching): Likewise. (dw2_print_stats): Likewise. (dw2_dump): Likewise. (dw2_relocate): Likewise. (dw2_expand_symtabs_for_function): Likewise. (dw2_expand_all_symtabs): Likewise. (dw2_expand_symtabs_with_filename): Likewise. (dw2_find_symbol_file): Likewise. (dw2_map_ada_symtabs): Likewise. (dw2_expand_symtabs_matching): Likewise. (dw2_find_pc_sect_symtab): Likewise. (dw2_map_symbol_names): Likewise. (dw2_map_symbol_filenames): Likewise. (dw2_has_symbols): Likewise. (dwarf2_gdb_index_functions): New global. (dwarf2_initialize_objfile): New function. (process_psymtab_comp_unit): Update. (add_partial_subprogram): Likewise. (dwarf2_psymtab_to_symtab): Likewise. (psymtab_to_symtab_1): Use dw2_do_instantiate_symtab. (process_full_comp_unit): Update. (find_file_and_directory): New function. (read_file_scope): Use find_file_and_directory. (dwarf2_per_cu_objfile): Update. (dwarf2_per_cu_addr_size): Update. (dwarf2_per_cu_offset_size): Update. (dwarf2_free_objfile): Free the index, if needed. (dwarf2_per_objfile_free): Unmap the index, if needed. (struct strtab_entry): New. (hash_strtab_entry): New function. (eq_strtab_entry): Likewise. (create_strtab): Likewise. (add_string): Likewise. (struct symtab_index_entry): New. (struct mapped_symtab): New. (hash_symtab_entry): New function. (eq_symtab_entry): Likewise. (delete_symtab_entry): Likewise. (create_index_table): Likewise. (create_mapped_symtab): Likewise. (cleanup_mapped_symtab): Likewise. (find_slot): Likewise. (hash_expand): Likewise. (add_index_entry): Likewise. (add_indices_to_cpool): Likewise. (write_hash_table): Likewise. (add_address_entry): Likewise. (write_psymbols): Likewise. (write_obstack): Likewise. (unlink_if_set): Likewise. (write_psymtabs_to_index): Likewise. (save_gdb_index_command): Likewise. (_initialize_dwarf2_read): Install "save gdb-index" command. (create_all_comp_units): Initialize 'objfile' field of CU. (dwarf2_locate_sections): Check for .gdb_index. * psymtab.h (dwarf2_gdb_index_functions): Declare. * symfile.h (dwarf2_initialize_objfile): Declare. gdb/doc * gdb.texinfo (Index Files): New node.
This commit is contained in:
Tom Tromey
parent
58b6ab1339
commit
9291a0cd80
10 changed files with 1813 additions and 68 deletions
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@ -1,3 +1,99 @@
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2010-07-13 Tom Tromey <tromey@redhat.com>
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* breakpoint.c (save_cmdlist): No longer static.
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* gdbcmd.h (save_cmdlist): Declare.
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* symfile.c (symbol_file_add_with_addrs_or_offsets): Set
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OBJF_READNOW on objfile if readnow_symbol_files.
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* elfread.c (elf_symfile_read): Use dwarf2_initialize_objfile.
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(elf_sym_fns_gdb_index): New global.
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* dwarf2read.c: Include exceptions.h.
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(offset_type): New.
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(struct mapped_index): New.
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(dwarf2_per_cu_data_ptr): New typedef.
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(struct dwarf2_per_objfile) <using_index, index_table, gdb_index>:
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New fields.
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(GDB_INDEX_SECTION): New define.
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(struct dwarf2_per_cu_quick_data): New.
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(struct dwarf2_per_cu_data) <objfile>: New field.
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<psymtab>: Removed.
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<v>: New field.
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(byte_swap): New function.
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(MAYBE_SWAP): New macro.
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(INDEX_SUFFIX): New macro.
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(dw2_do_instantiate_symtab): New function.
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(dw2_instantiate_symtab): Likewise.
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(create_cus_from_index): Likewise.
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(create_addrmap_from_index): Likewise.
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(mapped_index_string_hash): Likewise.
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(find_slot_in_mapped_hash): Likewise.
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(dwarf2_read_index): Likewise.
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(dw2_setup): Likewise.
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(dw2_require_line_header): Likewise.
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(dw2_require_full_path): Likewise.
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(dw2_find_last_source_symtab): Likewise.
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(dw2_forget_cached_source_info): Likewise.
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(dw2_lookup_symtab): Likewise.
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(dw2_lookup_symbol): Likewise.
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(dw2_do_expand_symtabs_matching): Likewise.
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(dw2_pre_expand_symtabs_matching): Likewise.
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(dw2_print_stats): Likewise.
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(dw2_dump): Likewise.
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(dw2_relocate): Likewise.
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(dw2_expand_symtabs_for_function): Likewise.
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(dw2_expand_all_symtabs): Likewise.
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(dw2_expand_symtabs_with_filename): Likewise.
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(dw2_find_symbol_file): Likewise.
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(dw2_map_ada_symtabs): Likewise.
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(dw2_expand_symtabs_matching): Likewise.
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(dw2_find_pc_sect_symtab): Likewise.
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(dw2_map_symbol_names): Likewise.
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(dw2_map_symbol_filenames): Likewise.
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(dw2_has_symbols): Likewise.
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(dwarf2_gdb_index_functions): New global.
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(dwarf2_initialize_objfile): New function.
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(process_psymtab_comp_unit): Update.
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(add_partial_subprogram): Likewise.
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(dwarf2_psymtab_to_symtab): Likewise.
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(psymtab_to_symtab_1): Use dw2_do_instantiate_symtab.
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(process_full_comp_unit): Update.
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(find_file_and_directory): New function.
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(read_file_scope): Use find_file_and_directory.
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(dwarf2_per_cu_objfile): Update.
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(dwarf2_per_cu_addr_size): Update.
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(dwarf2_per_cu_offset_size): Update.
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(dwarf2_free_objfile): Free the index, if needed.
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(dwarf2_per_objfile_free): Unmap the index, if needed.
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(struct strtab_entry): New.
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(hash_strtab_entry): New function.
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(eq_strtab_entry): Likewise.
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(create_strtab): Likewise.
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(add_string): Likewise.
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(struct symtab_index_entry): New.
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(struct mapped_symtab): New.
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(hash_symtab_entry): New function.
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(eq_symtab_entry): Likewise.
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(delete_symtab_entry): Likewise.
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(create_index_table): Likewise.
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(create_mapped_symtab): Likewise.
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(cleanup_mapped_symtab): Likewise.
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(find_slot): Likewise.
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(hash_expand): Likewise.
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(add_index_entry): Likewise.
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(add_indices_to_cpool): Likewise.
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(write_hash_table): Likewise.
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(add_address_entry): Likewise.
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(write_psymbols): Likewise.
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(write_obstack): Likewise.
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(unlink_if_set): Likewise.
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(write_psymtabs_to_index): Likewise.
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(save_gdb_index_command): Likewise.
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(_initialize_dwarf2_read): Install "save gdb-index"
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command.
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(create_all_comp_units): Initialize 'objfile' field of CU.
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(dwarf2_locate_sections): Check for .gdb_index.
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* psymtab.h (dwarf2_gdb_index_functions): Declare.
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* symfile.h (dwarf2_initialize_objfile): Declare.
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2010-07-13 Tom Tromey <tromey@redhat.com>
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* symtab.c (lookup_symbol_aux_symtabs): Call pre-expand hook.
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@ -430,7 +430,7 @@ static int tracepoint_count;
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static struct cmd_list_element *breakpoint_set_cmdlist;
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static struct cmd_list_element *breakpoint_show_cmdlist;
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static struct cmd_list_element *save_cmdlist;
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struct cmd_list_element *save_cmdlist;
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/* Return whether a breakpoint is an active enabled breakpoint. */
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static int
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@ -1,3 +1,7 @@
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2010-07-13 Tom Tromey <tromey@redhat.com>
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* gdb.texinfo (Index Files): New node.
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2010-07-13 Tom Tromey <tromey@redhat.com>
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* gdb.texinfo (GDB/MI Variable Objects): Remove extra 'for'.
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@ -14289,6 +14289,7 @@ program. To debug a core dump of a previous run, you must also tell
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@menu
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* Files:: Commands to specify files
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* Separate Debug Files:: Debugging information in separate files
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* Index Files:: Index files speed up GDB
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* Symbol Errors:: Errors reading symbol files
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* Data Files:: GDB data files
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@end menu
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@ -15178,6 +15179,46 @@ gnu_debuglink_crc32 (unsigned long crc,
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This computation does not apply to the ``build ID'' method.
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@node Index Files
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@section Index Files Speed Up @value{GDBN}
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@cindex index files
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@cindex @samp{.gdb_index} section
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When @value{GDBN} finds a symbol file, it scans the symbols in the
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file in order to construct an internal symbol table. This lets most
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@value{GDBN} operations work quickly---at the cost of a delay early
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on. For large programs, this delay can be quite lengthy, so
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@value{GDBN} provides a way to build an index, which speeds up
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startup.
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The index is stored as a section in the symbol file. @value{GDBN} can
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write the index to a file, then you can put it into the symbol file
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using @command{objcopy}.
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To create an index file, use the @code{save gdb-index} command:
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@table @code
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@item save gdb-index @var{directory}
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@kindex save gdb-index
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Create an index file for each symbol file currently known by
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@value{GDBN}. Each file is named after its corresponding symbol file,
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with @samp{.gdb-index} appended, and is written into the given
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@var{directory}.
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@end table
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Once you have created an index file you can merge it into your symbol
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file, here named @file{symfile}, using @command{objcopy}:
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@smallexample
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$ objcopy --add-section .gdb_index=symfile.gdb-index \
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--set-section-flags .gdb_index=readonly symfile symfile
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@end smallexample
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There are currently some limitation on indices. They only work when
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for DWARF debugging information, not stabs. And, they do not
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currently work for programs using Ada.
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@node Symbol Errors
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@section Errors Reading Symbol Files
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1695
gdb/dwarf2read.c
1695
gdb/dwarf2read.c
File diff suppressed because it is too large
Load diff
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@ -40,6 +40,9 @@
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extern void _initialize_elfread (void);
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/* Forward declaration. */
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static struct sym_fns elf_sym_fns_gdb_index;
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/* The struct elfinfo is available only during ELF symbol table and
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psymtab reading. It is destroyed at the completion of psymtab-reading.
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It's local to elf_symfile_read. */
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@ -869,11 +872,9 @@ elf_symfile_read (struct objfile *objfile, int symfile_flags)
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str_sect->filepos,
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bfd_section_size (abfd, str_sect));
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}
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if (dwarf2_has_info (objfile))
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{
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/* DWARF 2 sections */
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dwarf2_build_psymtabs (objfile);
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}
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if (dwarf2_has_info (objfile) && dwarf2_initialize_objfile (objfile))
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objfile->sf = &elf_sym_fns_gdb_index;
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/* If the file has its own symbol tables it has no separate debug info.
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`.dynsym'/`.symtab' go to MSYMBOLS, `.debug_info' goes to SYMTABS/PSYMTABS.
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NULL /* next: pointer to next struct sym_fns */
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};
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/* The same as elf_sym_fns, but not registered and uses the
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DWARF-specific GNU index rather than psymtab. */
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static struct sym_fns elf_sym_fns_gdb_index =
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{
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bfd_target_elf_flavour,
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elf_new_init, /* sym_new_init: init anything gbl to entire symab */
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elf_symfile_init, /* sym_init: read initial info, setup for sym_red() */
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elf_symfile_read, /* sym_read: read a symbol file into symtab */
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elf_symfile_finish, /* sym_finish: finished with file, cleanup */
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default_symfile_offsets, /* sym_offsets: Translate ext. to int. relocatin */
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elf_symfile_segments, /* sym_segments: Get segment information from
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a file. */
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NULL, /* sym_read_linetable */
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default_symfile_relocate, /* sym_relocate: Relocate a debug section. */
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&dwarf2_gdb_index_functions,
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NULL /* next: pointer to next struct sym_fns */
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};
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void
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_initialize_elfread (void)
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{
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extern struct cmd_list_element *showchecklist;
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/* Chain containing all defined "save" subcommands. */
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extern struct cmd_list_element *save_cmdlist;
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extern void execute_command (char *, int);
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enum command_control_type execute_control_command (struct command_line *);
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@ -1,6 +1,6 @@
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/* Public partial symbol table definitions.
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Copyright (C) 2009 Free Software Foundation, Inc.
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Copyright (C) 2009, 2010 Free Software Foundation, Inc.
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This file is part of GDB.
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@ -28,4 +28,6 @@ void map_partial_symbol_filenames (void (*) (const char *, const char *,
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extern const struct quick_symbol_functions psym_functions;
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extern const struct quick_symbol_functions dwarf2_gdb_index_functions;
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#endif /* PSYMTAB_H */
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const char *name = bfd_get_filename (abfd);
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const int from_tty = add_flags & SYMFILE_VERBOSE;
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if (readnow_symbol_files)
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flags |= OBJF_READNOW;
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my_cleanups = make_cleanup_bfd_close (abfd);
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/* Give user a chance to burp if we'd be
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the gdb startup command line or on a per symbol file basis. Expand
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all partial symbol tables for this objfile if so. */
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if ((flags & OBJF_READNOW) || readnow_symbol_files)
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if ((flags & OBJF_READNOW))
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{
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if (from_tty || info_verbose)
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{
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@ -575,6 +575,7 @@ extern struct cleanup *increment_reading_symtab (void);
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extern int dwarf2_has_info (struct objfile *);
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extern int dwarf2_initialize_objfile (struct objfile *);
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extern void dwarf2_build_psymtabs (struct objfile *);
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extern void dwarf2_build_frame_info (struct objfile *);
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