mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-15 04:31:49 +08:00
9a3c826307
Note: I needed to split this patch in two, otherwise it's too big for the mailing list. This patch adds explicit casts to situations where a void pointer is assigned to a pointer to the "real" type. Building in C++ mode requires those assignments to use an explicit cast. This includes, for example: - callback arguments (cleanups, comparison functions, ...) - data attached to some object (objfile, program space, etc) in the form of a void pointer - "user data" passed to some function This patch comes from the commit "(mostly) auto-generated patch to insert casts needed for C++", taken from Pedro's C++ branch. Only files built on x86 with --enable-targets=all are modified, so the native files for other arches will need to be dealt with separately. I built-tested this with --enable-targets=all and reg-tested. To my surprise, a test case (selftest.exp) had to be adjusted. Here's the ChangeLog entry. Again, this was relatively quick to make despite the length, thanks to David Malcom's script, although I don't believe it's very useful information in that particular case... gdb/ChangeLog: * aarch64-tdep.c (aarch64_make_prologue_cache): Add cast(s). (aarch64_make_stub_cache): Likewise. (value_of_aarch64_user_reg): Likewise. * ada-lang.c (ada_inferior_data_cleanup): Likewise. (get_ada_inferior_data): Likewise. (get_ada_pspace_data): Likewise. (ada_pspace_data_cleanup): Likewise. (ada_complete_symbol_matcher): Likewise. (ada_exc_search_name_matches): Likewise. * ada-tasks.c (get_ada_tasks_pspace_data): Likewise. (get_ada_tasks_inferior_data): Likewise. * addrmap.c (addrmap_mutable_foreach_worker): Likewise. (splay_obstack_alloc): Likewise. (splay_obstack_free): Likewise. * alpha-linux-tdep.c (alpha_linux_supply_gregset): Likewise. (alpha_linux_collect_gregset): Likewise. (alpha_linux_supply_fpregset): Likewise. (alpha_linux_collect_fpregset): Likewise. * alpha-mdebug-tdep.c (alpha_mdebug_frame_unwind_cache): Likewise. * alpha-tdep.c (alpha_lds): Likewise. (alpha_sts): Likewise. (alpha_sigtramp_frame_unwind_cache): Likewise. (alpha_heuristic_frame_unwind_cache): Likewise. (alpha_supply_int_regs): Likewise. (alpha_fill_int_regs): Likewise. (alpha_supply_fp_regs): Likewise. (alpha_fill_fp_regs): Likewise. * alphanbsd-tdep.c (alphanbsd_supply_fpregset): Likewise. (alphanbsd_aout_supply_gregset): Likewise. (alphanbsd_supply_gregset): Likewise. * amd64-linux-tdep.c (amd64_linux_init_abi): Likewise. (amd64_x32_linux_init_abi): Likewise. * amd64-nat.c (amd64_supply_native_gregset): Likewise. (amd64_collect_native_gregset): Likewise. * amd64-tdep.c (amd64_frame_cache): Likewise. (amd64_sigtramp_frame_cache): Likewise. (amd64_epilogue_frame_cache): Likewise. (amd64_supply_fxsave): Likewise. (amd64_supply_xsave): Likewise. (amd64_collect_fxsave): Likewise. (amd64_collect_xsave): Likewise. * amd64-windows-tdep.c (amd64_windows_frame_cache): Likewise. * amd64obsd-tdep.c (amd64obsd_trapframe_cache): Likewise. * arm-linux-tdep.c (arm_linux_supply_gregset): Likewise. (arm_linux_collect_gregset): Likewise. (arm_linux_supply_nwfpe): Likewise. (arm_linux_collect_nwfpe): Likewise. (arm_linux_supply_vfp): Likewise. (arm_linux_collect_vfp): Likewise. * arm-tdep.c (arm_find_mapping_symbol): Likewise. (arm_prologue_unwind_stop_reason): Likewise. (arm_prologue_this_id): Likewise. (arm_prologue_prev_register): Likewise. (arm_exidx_data_free): Likewise. (arm_find_exidx_entry): Likewise. (arm_stub_this_id): Likewise. (arm_m_exception_this_id): Likewise. (arm_m_exception_prev_register): Likewise. (arm_normal_frame_base): Likewise. (gdb_print_insn_arm): Likewise. (arm_objfile_data_free): Likewise. (arm_record_special_symbol): Likewise. (value_of_arm_user_reg): Likewise. * armbsd-tdep.c (armbsd_supply_fpregset): Likewise. (armbsd_supply_gregset): Likewise. * auto-load.c (auto_load_pspace_data_cleanup): Likewise. (get_auto_load_pspace_data): Likewise. (hash_loaded_script_entry): Likewise. (eq_loaded_script_entry): Likewise. (clear_section_scripts): Likewise. (collect_matching_scripts): Likewise. * auxv.c (auxv_inferior_data_cleanup): Likewise. (get_auxv_inferior_data): Likewise. * avr-tdep.c (avr_frame_unwind_cache): Likewise. * ax-general.c (do_free_agent_expr_cleanup): Likewise. * bfd-target.c (target_bfd_xfer_partial): Likewise. (target_bfd_xclose): Likewise. (target_bfd_get_section_table): Likewise. * bfin-tdep.c (bfin_frame_cache): Likewise. * block.c (find_block_in_blockvector): Likewise. (call_site_for_pc): Likewise. (block_find_non_opaque_type_preferred): Likewise. * break-catch-sig.c (signal_catchpoint_insert_location): Likewise. (signal_catchpoint_remove_location): Likewise. (signal_catchpoint_breakpoint_hit): Likewise. (signal_catchpoint_print_one): Likewise. (signal_catchpoint_print_mention): Likewise. (signal_catchpoint_print_recreate): Likewise. * break-catch-syscall.c (get_catch_syscall_inferior_data): Likewise. * breakpoint.c (do_cleanup_counted_command_line): Likewise. (bp_location_compare_addrs): Likewise. (get_first_locp_gte_addr): Likewise. (check_tracepoint_command): Likewise. (do_map_commands_command): Likewise. (get_breakpoint_objfile_data): Likewise. (free_breakpoint_probes): Likewise. (do_captured_breakpoint_query): Likewise. (compare_breakpoints): Likewise. (bp_location_compare): Likewise. (bpstat_remove_breakpoint_callback): Likewise. (do_delete_breakpoint_cleanup): Likewise. * bsd-uthread.c (bsd_uthread_set_supply_uthread): Likewise. (bsd_uthread_set_collect_uthread): Likewise. (bsd_uthread_activate): Likewise. (bsd_uthread_fetch_registers): Likewise. (bsd_uthread_store_registers): Likewise. * btrace.c (check_xml_btrace_version): Likewise. (parse_xml_btrace_block): Likewise. (parse_xml_btrace_pt_config_cpu): Likewise. (parse_xml_btrace_pt_raw): Likewise. (parse_xml_btrace_pt): Likewise. (parse_xml_btrace_conf_bts): Likewise. (parse_xml_btrace_conf_pt): Likewise. (do_btrace_data_cleanup): Likewise. * c-typeprint.c (find_typedef_for_canonicalize): Likewise. * charset.c (cleanup_iconv): Likewise. (do_cleanup_iterator): Likewise. * cli-out.c (cli_uiout_dtor): Likewise. (cli_table_begin): Likewise. (cli_table_body): Likewise. (cli_table_end): Likewise. (cli_table_header): Likewise. (cli_begin): Likewise. (cli_end): Likewise. (cli_field_int): Likewise. (cli_field_skip): Likewise. (cli_field_string): Likewise. (cli_field_fmt): Likewise. (cli_spaces): Likewise. (cli_text): Likewise. (cli_message): Likewise. (cli_wrap_hint): Likewise. (cli_flush): Likewise. (cli_redirect): Likewise. (out_field_fmt): Likewise. (field_separator): Likewise. (cli_out_set_stream): Likewise. * cli/cli-cmds.c (compare_symtabs): Likewise. * cli/cli-dump.c (call_dump_func): Likewise. (restore_section_callback): Likewise. * cli/cli-script.c (clear_hook_in_cleanup): Likewise. (do_restore_user_call_depth): Likewise. (do_free_command_lines_cleanup): Likewise. * coff-pe-read.c (get_section_vmas): Likewise. (pe_as16): Likewise. (pe_as32): Likewise. * coffread.c (coff_symfile_read): Likewise. * common/agent.c (agent_look_up_symbols): Likewise. * common/filestuff.c (do_close_cleanup): Likewise. * common/format.c (free_format_pieces_cleanup): Likewise. * common/vec.c (vec_o_reserve): Likewise. * compile/compile-c-support.c (print_one_macro): Likewise. * compile/compile-c-symbols.c (hash_symbol_error): Likewise. (eq_symbol_error): Likewise. (del_symbol_error): Likewise. (error_symbol_once): Likewise. (gcc_convert_symbol): Likewise. (gcc_symbol_address): Likewise. (hash_symname): Likewise. (eq_symname): Likewise. * compile/compile-c-types.c (hash_type_map_instance): Likewise. (eq_type_map_instance): Likewise. (insert_type): Likewise. (convert_type): Likewise. * compile/compile-object-load.c (munmap_listp_free_cleanup): Likewise. (setup_sections): Likewise. (link_hash_table_free): Likewise. (copy_sections): Likewise. * compile/compile-object-run.c (do_module_cleanup): Likewise. * compile/compile.c (compile_print_value): Likewise. (do_rmdir): Likewise. (cleanup_compile_instance): Likewise. (cleanup_unlink_file): Likewise. * completer.c (free_completion_tracker): Likewise. * corelow.c (add_to_spuid_list): Likewise. * cp-namespace.c (reset_directive_searched): Likewise. * cp-support.c (reset_directive_searched): Likewise. * cris-tdep.c (cris_sigtramp_frame_unwind_cache): Likewise. (cris_frame_unwind_cache): Likewise. * d-lang.c (builtin_d_type): Likewise. * d-namespace.c (reset_directive_searched): Likewise. * dbxread.c (dbx_free_symfile_info): Likewise. (do_free_bincl_list_cleanup): Likewise. * disasm.c (hash_dis_line_entry): Likewise. (eq_dis_line_entry): Likewise. (dis_asm_print_address): Likewise. (fprintf_disasm): Likewise. (do_ui_file_delete): Likewise. * doublest.c (convert_floatformat_to_doublest): Likewise. * dummy-frame.c (pop_dummy_frame_bpt): Likewise. (dummy_frame_prev_register): Likewise. (dummy_frame_this_id): Likewise. * dwarf2-frame-tailcall.c (cache_hash): Likewise. (cache_eq): Likewise. (cache_find): Likewise. (tailcall_frame_this_id): Likewise. (dwarf2_tailcall_prev_register_first): Likewise. (tailcall_frame_prev_register): Likewise. (tailcall_frame_dealloc_cache): Likewise. (tailcall_frame_prev_arch): Likewise. * dwarf2-frame.c (dwarf2_frame_state_free): Likewise. (dwarf2_frame_set_init_reg): Likewise. (dwarf2_frame_init_reg): Likewise. (dwarf2_frame_set_signal_frame_p): Likewise. (dwarf2_frame_signal_frame_p): Likewise. (dwarf2_frame_set_adjust_regnum): Likewise. (dwarf2_frame_adjust_regnum): Likewise. (clear_pointer_cleanup): Likewise. (dwarf2_frame_cache): Likewise. (find_cie): Likewise. (dwarf2_frame_find_fde): Likewise. * dwarf2expr.c (dwarf_expr_address_type): Likewise. (free_dwarf_expr_context_cleanup): Likewise. * dwarf2loc.c (locexpr_find_frame_base_location): Likewise. (locexpr_get_frame_base): Likewise. (loclist_find_frame_base_location): Likewise. (loclist_get_frame_base): Likewise. (dwarf_expr_dwarf_call): Likewise. (dwarf_expr_get_base_type): Likewise. (dwarf_expr_push_dwarf_reg_entry_value): Likewise. (dwarf_expr_get_obj_addr): Likewise. (entry_data_value_coerce_ref): Likewise. (entry_data_value_copy_closure): Likewise. (entry_data_value_free_closure): Likewise. (get_frame_address_in_block_wrapper): Likewise. (dwarf2_evaluate_property): Likewise. (dwarf2_compile_property_to_c): Likewise. (needs_frame_read_addr_from_reg): Likewise. (needs_frame_get_reg_value): Likewise. (needs_frame_frame_base): Likewise. (needs_frame_frame_cfa): Likewise. (needs_frame_tls_address): Likewise. (needs_frame_dwarf_call): Likewise. (needs_dwarf_reg_entry_value): Likewise. (get_ax_pc): Likewise. (locexpr_read_variable): Likewise. (locexpr_read_variable_at_entry): Likewise. (locexpr_read_needs_frame): Likewise. (locexpr_describe_location): Likewise. (locexpr_tracepoint_var_ref): Likewise. (locexpr_generate_c_location): Likewise. (loclist_read_variable): Likewise. (loclist_read_variable_at_entry): Likewise. (loclist_describe_location): Likewise. (loclist_tracepoint_var_ref): Likewise. (loclist_generate_c_location): Likewise. * dwarf2read.c (line_header_hash_voidp): Likewise. (line_header_eq_voidp): Likewise. (dwarf2_has_info): Likewise. (dwarf2_get_section_info): Likewise. (locate_dwz_sections): Likewise. (hash_file_name_entry): Likewise. (eq_file_name_entry): Likewise. (delete_file_name_entry): Likewise. (dw2_setup): Likewise. (dw2_get_file_names_reader): Likewise. (dw2_find_pc_sect_compunit_symtab): Likewise. (hash_signatured_type): Likewise. (eq_signatured_type): Likewise. (add_signatured_type_cu_to_table): Likewise. (create_debug_types_hash_table): Likewise. (lookup_dwo_signatured_type): Likewise. (lookup_dwp_signatured_type): Likewise. (lookup_signatured_type): Likewise. (hash_type_unit_group): Likewise. (eq_type_unit_group): Likewise. (get_type_unit_group): Likewise. (process_psymtab_comp_unit_reader): Likewise. (sort_tu_by_abbrev_offset): Likewise. (process_skeletonless_type_unit): Likewise. (psymtabs_addrmap_cleanup): Likewise. (dwarf2_read_symtab): Likewise. (psymtab_to_symtab_1): Likewise. (die_hash): Likewise. (die_eq): Likewise. (load_full_comp_unit_reader): Likewise. (reset_die_in_process): Likewise. (free_cu_line_header): Likewise. (handle_DW_AT_stmt_list): Likewise. (hash_dwo_file): Likewise. (eq_dwo_file): Likewise. (hash_dwo_unit): Likewise. (eq_dwo_unit): Likewise. (create_dwo_cu_reader): Likewise. (create_dwo_unit_in_dwp_v1): Likewise. (create_dwo_unit_in_dwp_v2): Likewise. (lookup_dwo_unit_in_dwp): Likewise. (dwarf2_locate_dwo_sections): Likewise. (dwarf2_locate_common_dwp_sections): Likewise. (dwarf2_locate_v2_dwp_sections): Likewise. (hash_dwp_loaded_cutus): Likewise. (eq_dwp_loaded_cutus): Likewise. (lookup_dwo_cutu): Likewise. (abbrev_table_free_cleanup): Likewise. (dwarf2_free_abbrev_table): Likewise. (find_partial_die_in_comp_unit): Likewise. (free_line_header_voidp): Likewise. (follow_die_offset): Likewise. (follow_die_sig_1): Likewise. (free_heap_comp_unit): Likewise. (free_stack_comp_unit): Likewise. (dwarf2_free_objfile): Likewise. (per_cu_offset_and_type_hash): Likewise. (per_cu_offset_and_type_eq): Likewise. (get_die_type_at_offset): Likewise. (partial_die_hash): Likewise. (partial_die_eq): Likewise. (dwarf2_per_objfile_free): Likewise. (hash_strtab_entry): Likewise. (eq_strtab_entry): Likewise. (add_string): Likewise. (hash_symtab_entry): Likewise. (eq_symtab_entry): Likewise. (delete_symtab_entry): Likewise. (cleanup_mapped_symtab): Likewise. (add_indices_to_cpool): Likewise. (hash_psymtab_cu_index): Likewise. (eq_psymtab_cu_index): Likewise. (add_address_entry_worker): Likewise. (unlink_if_set): Likewise. (write_one_signatured_type): Likewise. (save_gdb_index_command): Likewise. * elfread.c (elf_symtab_read): Likewise. (elf_gnu_ifunc_cache_hash): Likewise. (elf_gnu_ifunc_cache_eq): Likewise. (elf_gnu_ifunc_record_cache): Likewise. (elf_gnu_ifunc_resolve_by_cache): Likewise. (elf_get_probes): Likewise. (probe_key_free): Likewise. * f-lang.c (builtin_f_type): Likewise. * frame-base.c (frame_base_append_sniffer): Likewise. (frame_base_set_default): Likewise. (frame_base_find_by_frame): Likewise. * frame-unwind.c (frame_unwind_prepend_unwinder): Likewise. (frame_unwind_append_unwinder): Likewise. (frame_unwind_find_by_frame): Likewise. * frame.c (frame_addr_hash): Likewise. (frame_addr_hash_eq): Likewise. (frame_stash_find): Likewise. (do_frame_register_read): Likewise. (unwind_to_current_frame): Likewise. (frame_cleanup_after_sniffer): Likewise. * frv-linux-tdep.c (frv_linux_sigtramp_frame_cache): Likewise. * frv-tdep.c (frv_frame_unwind_cache): Likewise. * ft32-tdep.c (ft32_frame_cache): Likewise. * gcore.c (do_bfd_delete_cleanup): Likewise. (gcore_create_callback): Likewise. * gdb_bfd.c (hash_bfd): Likewise. (eq_bfd): Likewise. (gdb_bfd_open): Likewise. (free_one_bfd_section): Likewise. (gdb_bfd_ref): Likewise. (gdb_bfd_unref): Likewise. (get_section_descriptor): Likewise. (gdb_bfd_map_section): Likewise. (gdb_bfd_crc): Likewise. (gdb_bfd_mark_parent): Likewise. (gdb_bfd_record_inclusion): Likewise. (gdb_bfd_requires_relocations): Likewise. (print_one_bfd): Likewise. * gdbtypes.c (type_pair_hash): Likewise. (type_pair_eq): Likewise. (builtin_type): Likewise. (objfile_type): Likewise. * gnu-v3-abi.c (vtable_ptrdiff_type): Likewise. (vtable_address_point_offset): Likewise. (gnuv3_get_vtable): Likewise. (hash_value_and_voffset): Likewise. (eq_value_and_voffset): Likewise. (compare_value_and_voffset): Likewise. (compute_vtable_size): Likewise. (gnuv3_get_typeid_type): Likewise. * go-lang.c (builtin_go_type): Likewise. * guile/scm-block.c (bkscm_hash_block_smob): Likewise. (bkscm_eq_block_smob): Likewise. (bkscm_objfile_block_map): Likewise. (bkscm_del_objfile_blocks): Likewise. * guile/scm-breakpoint.c (bpscm_build_bp_list): Likewise. * guile/scm-disasm.c (gdbscm_disasm_read_memory_worker): Likewise. (gdbscm_disasm_print_address): Likewise. * guile/scm-frame.c (frscm_hash_frame_smob): Likewise. (frscm_eq_frame_smob): Likewise. (frscm_inferior_frame_map): Likewise. (frscm_del_inferior_frames): Likewise. * guile/scm-gsmob.c (gdbscm_add_objfile_ref): Likewise. * guile/scm-objfile.c (ofscm_handle_objfile_deleted): Likewise. (ofscm_objfile_smob_from_objfile): Likewise. * guile/scm-ports.c (ioscm_write): Likewise. (ioscm_file_port_delete): Likewise. (ioscm_file_port_rewind): Likewise. (ioscm_file_port_put): Likewise. (ioscm_file_port_write): Likewise. * guile/scm-progspace.c (psscm_handle_pspace_deleted): Likewise. (psscm_pspace_smob_from_pspace): Likewise. * guile/scm-safe-call.c (scscm_recording_pre_unwind_handler): Likewise. (scscm_recording_unwind_handler): Likewise. (gdbscm_with_catch): Likewise. (scscm_call_0_body): Likewise. (scscm_call_1_body): Likewise. (scscm_call_2_body): Likewise. (scscm_call_3_body): Likewise. (scscm_call_4_body): Likewise. (scscm_apply_1_body): Likewise. (scscm_eval_scheme_string): Likewise. (gdbscm_safe_eval_string): Likewise. (scscm_source_scheme_script): Likewise. (gdbscm_safe_source_script): Likewise. * guile/scm-string.c (gdbscm_call_scm_to_stringn): Likewise. (gdbscm_call_scm_from_stringn): Likewise. * guile/scm-symbol.c (syscm_hash_symbol_smob): Likewise. (syscm_eq_symbol_smob): Likewise. (syscm_get_symbol_map): Likewise. (syscm_del_objfile_symbols): Likewise. * guile/scm-symtab.c (stscm_hash_symtab_smob): Likewise. (stscm_eq_symtab_smob): Likewise. (stscm_objfile_symtab_map): Likewise. (stscm_del_objfile_symtabs): Likewise. * guile/scm-type.c (tyscm_hash_type_smob): Likewise. (tyscm_eq_type_smob): Likewise. (tyscm_type_map): Likewise. (tyscm_copy_type_recursive): Likewise. (save_objfile_types): Likewise. * guile/scm-utils.c (extract_arg): Likewise. * h8300-tdep.c (h8300_frame_cache): Likewise. * hppa-linux-tdep.c (hppa_linux_sigtramp_frame_unwind_cache): Likewise. * hppa-tdep.c (compare_unwind_entries): Likewise. (find_unwind_entry): Likewise. (hppa_frame_cache): Likewise. (hppa_stub_frame_unwind_cache): Likewise. * hppanbsd-tdep.c (hppanbsd_supply_gregset): Likewise. * hppaobsd-tdep.c (hppaobsd_supply_gregset): Likewise. (hppaobsd_supply_fpregset): Likewise. * i386-cygwin-tdep.c (core_process_module_section): Likewise. * i386-linux-tdep.c (i386_linux_init_abi): Likewise. * i386-tdep.c (i386_frame_cache): Likewise. (i386_epilogue_frame_cache): Likewise. (i386_sigtramp_frame_cache): Likewise. (i386_supply_gregset): Likewise. (i386_collect_gregset): Likewise. (i386_gdbarch_init): Likewise. * i386obsd-tdep.c (i386obsd_aout_supply_regset): Likewise. (i386obsd_trapframe_cache): Likewise. * i387-tdep.c (i387_supply_fsave): Likewise. (i387_collect_fsave): Likewise. (i387_supply_fxsave): Likewise. (i387_collect_fxsave): Likewise. (i387_supply_xsave): Likewise. (i387_collect_xsave): Likewise. * ia64-tdep.c (ia64_frame_cache): Likewise. (ia64_sigtramp_frame_cache): Likewise. * infcmd.c (attach_command_continuation): Likewise. (attach_command_continuation_free_args): Likewise. * inferior.c (restore_inferior): Likewise. (delete_thread_of_inferior): Likewise. * inflow.c (inflow_inferior_data_cleanup): Likewise. (get_inflow_inferior_data): Likewise. (inflow_inferior_exit): Likewise. * infrun.c (displaced_step_clear_cleanup): Likewise. (restore_current_uiout_cleanup): Likewise. (release_stop_context_cleanup): Likewise. (do_restore_infcall_suspend_state_cleanup): Likewise. (do_restore_infcall_control_state_cleanup): Likewise. (restore_inferior_ptid): Likewise. * inline-frame.c (block_starting_point_at): Likewise. * iq2000-tdep.c (iq2000_frame_cache): Likewise. * jit.c (get_jit_objfile_data): Likewise. (get_jit_program_space_data): Likewise. (jit_object_close_impl): Likewise. (jit_find_objf_with_entry_addr): Likewise. (jit_breakpoint_deleted): Likewise. (jit_unwind_reg_set_impl): Likewise. (jit_unwind_reg_get_impl): Likewise. (jit_dealloc_cache): Likewise. (jit_frame_sniffer): Likewise. (jit_frame_prev_register): Likewise. (jit_prepend_unwinder): Likewise. (jit_inferior_exit_hook): Likewise. (free_objfile_data): Likewise. * jv-lang.c (jv_per_objfile_free): Likewise. (get_dynamics_objfile): Likewise. (get_java_class_symtab): Likewise. (builtin_java_type): Likewise. * language.c (language_string_char_type): Likewise. (language_bool_type): Likewise. (language_lookup_primitive_type): Likewise. (language_lookup_primitive_type_as_symbol): Likewise. * linespec.c (hash_address_entry): Likewise. (eq_address_entry): Likewise. (iterate_inline_only): Likewise. (iterate_name_matcher): Likewise. (decode_line_2_compare_items): Likewise. (collect_one_symbol): Likewise. (compare_symbols): Likewise. (compare_msymbols): Likewise. (add_symtabs_to_list): Likewise. (collect_symbols): Likewise. (compare_msyms): Likewise. (add_minsym): Likewise. (cleanup_linespec_result): Likewise. * linux-fork.c (inferior_call_waitpid_cleanup): Likewise. * linux-nat.c (delete_lwp_cleanup): Likewise. (count_events_callback): Likewise. (select_event_lwp_callback): Likewise. (resume_stopped_resumed_lwps): Likewise. * linux-tdep.c (get_linux_gdbarch_data): Likewise. (invalidate_linux_cache_inf): Likewise. (get_linux_inferior_data): Likewise. (linux_find_memory_regions_thunk): Likewise. (linux_make_mappings_callback): Likewise. (linux_corefile_thread_callback): Likewise. (find_mapping_size): Likewise. * linux-thread-db.c (find_new_threads_callback): Likewise. * lm32-tdep.c (lm32_frame_cache): Likewise. * m2-lang.c (builtin_m2_type): Likewise. * m32c-tdep.c (m32c_analyze_frame_prologue): Likewise. * m32r-linux-tdep.c (m32r_linux_sigtramp_frame_cache): Likewise. (m32r_linux_supply_gregset): Likewise. (m32r_linux_collect_gregset): Likewise. * m32r-tdep.c (m32r_frame_unwind_cache): Likewise. * m68hc11-tdep.c (m68hc11_frame_unwind_cache): Likewise. * m68k-tdep.c (m68k_frame_cache): Likewise. * m68kbsd-tdep.c (m68kbsd_supply_fpregset): Likewise. (m68kbsd_supply_gregset): Likewise. * m68klinux-tdep.c (m68k_linux_sigtramp_frame_cache): Likewise. * m88k-tdep.c (m88k_frame_cache): Likewise. (m88k_supply_gregset): Likewise. gdb/gdbserver/ChangeLog: * dll.c (match_dll): Add cast(s). (unloaded_dll): Likewise. * linux-low.c (second_thread_of_pid_p): Likewise. (delete_lwp_callback): Likewise. (count_events_callback): Likewise. (select_event_lwp_callback): Likewise. (linux_set_resume_request): Likewise. * server.c (accumulate_file_name_length): Likewise. (emit_dll_description): Likewise. (handle_qxfer_threads_worker): Likewise. (visit_actioned_threads): Likewise. * thread-db.c (any_thread_of): Likewise. * tracepoint.c (same_process_p): Likewise. (match_blocktype): Likewise. (build_traceframe_info_xml): Likewise. gdb/testsuite/ChangeLog: * gdb.gdb/selftest.exp (do_steps_and_nexts): Adjust expected source line.
1417 lines
45 KiB
C
1417 lines
45 KiB
C
/* Abstraction of GNU v3 abi.
|
|
Contributed by Jim Blandy <jimb@redhat.com>
|
|
|
|
Copyright (C) 2001-2015 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#include "defs.h"
|
|
#include "value.h"
|
|
#include "cp-abi.h"
|
|
#include "cp-support.h"
|
|
#include "demangle.h"
|
|
#include "objfiles.h"
|
|
#include "valprint.h"
|
|
#include "c-lang.h"
|
|
#include "typeprint.h"
|
|
|
|
static struct cp_abi_ops gnu_v3_abi_ops;
|
|
|
|
/* A gdbarch key for std::type_info, in the event that it can't be
|
|
found in the debug info. */
|
|
|
|
static struct gdbarch_data *std_type_info_gdbarch_data;
|
|
|
|
|
|
static int
|
|
gnuv3_is_vtable_name (const char *name)
|
|
{
|
|
return startswith (name, "_ZTV");
|
|
}
|
|
|
|
static int
|
|
gnuv3_is_operator_name (const char *name)
|
|
{
|
|
return startswith (name, "operator");
|
|
}
|
|
|
|
|
|
/* To help us find the components of a vtable, we build ourselves a
|
|
GDB type object representing the vtable structure. Following the
|
|
V3 ABI, it goes something like this:
|
|
|
|
struct gdb_gnu_v3_abi_vtable {
|
|
|
|
/ * An array of virtual call and virtual base offsets. The real
|
|
length of this array depends on the class hierarchy; we use
|
|
negative subscripts to access the elements. Yucky, but
|
|
better than the alternatives. * /
|
|
ptrdiff_t vcall_and_vbase_offsets[0];
|
|
|
|
/ * The offset from a virtual pointer referring to this table
|
|
to the top of the complete object. * /
|
|
ptrdiff_t offset_to_top;
|
|
|
|
/ * The type_info pointer for this class. This is really a
|
|
std::type_info *, but GDB doesn't really look at the
|
|
type_info object itself, so we don't bother to get the type
|
|
exactly right. * /
|
|
void *type_info;
|
|
|
|
/ * Virtual table pointers in objects point here. * /
|
|
|
|
/ * Virtual function pointers. Like the vcall/vbase array, the
|
|
real length of this table depends on the class hierarchy. * /
|
|
void (*virtual_functions[0]) ();
|
|
|
|
};
|
|
|
|
The catch, of course, is that the exact layout of this table
|
|
depends on the ABI --- word size, endianness, alignment, etc. So
|
|
the GDB type object is actually a per-architecture kind of thing.
|
|
|
|
vtable_type_gdbarch_data is a gdbarch per-architecture data pointer
|
|
which refers to the struct type * for this structure, laid out
|
|
appropriately for the architecture. */
|
|
static struct gdbarch_data *vtable_type_gdbarch_data;
|
|
|
|
|
|
/* Human-readable names for the numbers of the fields above. */
|
|
enum {
|
|
vtable_field_vcall_and_vbase_offsets,
|
|
vtable_field_offset_to_top,
|
|
vtable_field_type_info,
|
|
vtable_field_virtual_functions
|
|
};
|
|
|
|
|
|
/* Return a GDB type representing `struct gdb_gnu_v3_abi_vtable',
|
|
described above, laid out appropriately for ARCH.
|
|
|
|
We use this function as the gdbarch per-architecture data
|
|
initialization function. */
|
|
static void *
|
|
build_gdb_vtable_type (struct gdbarch *arch)
|
|
{
|
|
struct type *t;
|
|
struct field *field_list, *field;
|
|
int offset;
|
|
|
|
struct type *void_ptr_type
|
|
= builtin_type (arch)->builtin_data_ptr;
|
|
struct type *ptr_to_void_fn_type
|
|
= builtin_type (arch)->builtin_func_ptr;
|
|
|
|
/* ARCH can't give us the true ptrdiff_t type, so we guess. */
|
|
struct type *ptrdiff_type
|
|
= arch_integer_type (arch, gdbarch_ptr_bit (arch), 0, "ptrdiff_t");
|
|
|
|
/* We assume no padding is necessary, since GDB doesn't know
|
|
anything about alignment at the moment. If this assumption bites
|
|
us, we should add a gdbarch method which, given a type, returns
|
|
the alignment that type requires, and then use that here. */
|
|
|
|
/* Build the field list. */
|
|
field_list = XCNEWVEC (struct field, 4);
|
|
field = &field_list[0];
|
|
offset = 0;
|
|
|
|
/* ptrdiff_t vcall_and_vbase_offsets[0]; */
|
|
FIELD_NAME (*field) = "vcall_and_vbase_offsets";
|
|
FIELD_TYPE (*field) = lookup_array_range_type (ptrdiff_type, 0, -1);
|
|
SET_FIELD_BITPOS (*field, offset * TARGET_CHAR_BIT);
|
|
offset += TYPE_LENGTH (FIELD_TYPE (*field));
|
|
field++;
|
|
|
|
/* ptrdiff_t offset_to_top; */
|
|
FIELD_NAME (*field) = "offset_to_top";
|
|
FIELD_TYPE (*field) = ptrdiff_type;
|
|
SET_FIELD_BITPOS (*field, offset * TARGET_CHAR_BIT);
|
|
offset += TYPE_LENGTH (FIELD_TYPE (*field));
|
|
field++;
|
|
|
|
/* void *type_info; */
|
|
FIELD_NAME (*field) = "type_info";
|
|
FIELD_TYPE (*field) = void_ptr_type;
|
|
SET_FIELD_BITPOS (*field, offset * TARGET_CHAR_BIT);
|
|
offset += TYPE_LENGTH (FIELD_TYPE (*field));
|
|
field++;
|
|
|
|
/* void (*virtual_functions[0]) (); */
|
|
FIELD_NAME (*field) = "virtual_functions";
|
|
FIELD_TYPE (*field) = lookup_array_range_type (ptr_to_void_fn_type, 0, -1);
|
|
SET_FIELD_BITPOS (*field, offset * TARGET_CHAR_BIT);
|
|
offset += TYPE_LENGTH (FIELD_TYPE (*field));
|
|
field++;
|
|
|
|
/* We assumed in the allocation above that there were four fields. */
|
|
gdb_assert (field == (field_list + 4));
|
|
|
|
t = arch_type (arch, TYPE_CODE_STRUCT, offset, NULL);
|
|
TYPE_NFIELDS (t) = field - field_list;
|
|
TYPE_FIELDS (t) = field_list;
|
|
TYPE_TAG_NAME (t) = "gdb_gnu_v3_abi_vtable";
|
|
INIT_CPLUS_SPECIFIC (t);
|
|
|
|
return make_type_with_address_space (t, TYPE_INSTANCE_FLAG_CODE_SPACE);
|
|
}
|
|
|
|
|
|
/* Return the ptrdiff_t type used in the vtable type. */
|
|
static struct type *
|
|
vtable_ptrdiff_type (struct gdbarch *gdbarch)
|
|
{
|
|
struct type *vtable_type
|
|
= (struct type *) gdbarch_data (gdbarch, vtable_type_gdbarch_data);
|
|
|
|
/* The "offset_to_top" field has the appropriate (ptrdiff_t) type. */
|
|
return TYPE_FIELD_TYPE (vtable_type, vtable_field_offset_to_top);
|
|
}
|
|
|
|
/* Return the offset from the start of the imaginary `struct
|
|
gdb_gnu_v3_abi_vtable' object to the vtable's "address point"
|
|
(i.e., where objects' virtual table pointers point). */
|
|
static int
|
|
vtable_address_point_offset (struct gdbarch *gdbarch)
|
|
{
|
|
struct type *vtable_type
|
|
= (struct type *) gdbarch_data (gdbarch, vtable_type_gdbarch_data);
|
|
|
|
return (TYPE_FIELD_BITPOS (vtable_type, vtable_field_virtual_functions)
|
|
/ TARGET_CHAR_BIT);
|
|
}
|
|
|
|
|
|
/* Determine whether structure TYPE is a dynamic class. Cache the
|
|
result. */
|
|
|
|
static int
|
|
gnuv3_dynamic_class (struct type *type)
|
|
{
|
|
int fieldnum, fieldelem;
|
|
|
|
type = check_typedef (type);
|
|
gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT
|
|
|| TYPE_CODE (type) == TYPE_CODE_UNION);
|
|
|
|
if (TYPE_CODE (type) == TYPE_CODE_UNION)
|
|
return 0;
|
|
|
|
if (TYPE_CPLUS_DYNAMIC (type))
|
|
return TYPE_CPLUS_DYNAMIC (type) == 1;
|
|
|
|
ALLOCATE_CPLUS_STRUCT_TYPE (type);
|
|
|
|
for (fieldnum = 0; fieldnum < TYPE_N_BASECLASSES (type); fieldnum++)
|
|
if (BASETYPE_VIA_VIRTUAL (type, fieldnum)
|
|
|| gnuv3_dynamic_class (TYPE_FIELD_TYPE (type, fieldnum)))
|
|
{
|
|
TYPE_CPLUS_DYNAMIC (type) = 1;
|
|
return 1;
|
|
}
|
|
|
|
for (fieldnum = 0; fieldnum < TYPE_NFN_FIELDS (type); fieldnum++)
|
|
for (fieldelem = 0; fieldelem < TYPE_FN_FIELDLIST_LENGTH (type, fieldnum);
|
|
fieldelem++)
|
|
{
|
|
struct fn_field *f = TYPE_FN_FIELDLIST1 (type, fieldnum);
|
|
|
|
if (TYPE_FN_FIELD_VIRTUAL_P (f, fieldelem))
|
|
{
|
|
TYPE_CPLUS_DYNAMIC (type) = 1;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
TYPE_CPLUS_DYNAMIC (type) = -1;
|
|
return 0;
|
|
}
|
|
|
|
/* Find the vtable for a value of CONTAINER_TYPE located at
|
|
CONTAINER_ADDR. Return a value of the correct vtable type for this
|
|
architecture, or NULL if CONTAINER does not have a vtable. */
|
|
|
|
static struct value *
|
|
gnuv3_get_vtable (struct gdbarch *gdbarch,
|
|
struct type *container_type, CORE_ADDR container_addr)
|
|
{
|
|
struct type *vtable_type
|
|
= (struct type *) gdbarch_data (gdbarch, vtable_type_gdbarch_data);
|
|
struct type *vtable_pointer_type;
|
|
struct value *vtable_pointer;
|
|
CORE_ADDR vtable_address;
|
|
|
|
container_type = check_typedef (container_type);
|
|
gdb_assert (TYPE_CODE (container_type) == TYPE_CODE_STRUCT);
|
|
|
|
/* If this type does not have a virtual table, don't read the first
|
|
field. */
|
|
if (!gnuv3_dynamic_class (container_type))
|
|
return NULL;
|
|
|
|
/* We do not consult the debug information to find the virtual table.
|
|
The ABI specifies that it is always at offset zero in any class,
|
|
and debug information may not represent it.
|
|
|
|
We avoid using value_contents on principle, because the object might
|
|
be large. */
|
|
|
|
/* Find the type "pointer to virtual table". */
|
|
vtable_pointer_type = lookup_pointer_type (vtable_type);
|
|
|
|
/* Load it from the start of the class. */
|
|
vtable_pointer = value_at (vtable_pointer_type, container_addr);
|
|
vtable_address = value_as_address (vtable_pointer);
|
|
|
|
/* Correct it to point at the start of the virtual table, rather
|
|
than the address point. */
|
|
return value_at_lazy (vtable_type,
|
|
vtable_address
|
|
- vtable_address_point_offset (gdbarch));
|
|
}
|
|
|
|
|
|
static struct type *
|
|
gnuv3_rtti_type (struct value *value,
|
|
int *full_p, int *top_p, int *using_enc_p)
|
|
{
|
|
struct gdbarch *gdbarch;
|
|
struct type *values_type = check_typedef (value_type (value));
|
|
struct value *vtable;
|
|
struct minimal_symbol *vtable_symbol;
|
|
const char *vtable_symbol_name;
|
|
const char *class_name;
|
|
struct type *run_time_type;
|
|
LONGEST offset_to_top;
|
|
char *atsign;
|
|
|
|
/* We only have RTTI for class objects. */
|
|
if (TYPE_CODE (values_type) != TYPE_CODE_STRUCT)
|
|
return NULL;
|
|
|
|
/* Java doesn't have RTTI following the C++ ABI. */
|
|
if (TYPE_CPLUS_REALLY_JAVA (values_type))
|
|
return NULL;
|
|
|
|
/* Determine architecture. */
|
|
gdbarch = get_type_arch (values_type);
|
|
|
|
if (using_enc_p)
|
|
*using_enc_p = 0;
|
|
|
|
vtable = gnuv3_get_vtable (gdbarch, values_type,
|
|
value_as_address (value_addr (value)));
|
|
if (vtable == NULL)
|
|
return NULL;
|
|
|
|
/* Find the linker symbol for this vtable. */
|
|
vtable_symbol
|
|
= lookup_minimal_symbol_by_pc (value_address (vtable)
|
|
+ value_embedded_offset (vtable)).minsym;
|
|
if (! vtable_symbol)
|
|
return NULL;
|
|
|
|
/* The symbol's demangled name should be something like "vtable for
|
|
CLASS", where CLASS is the name of the run-time type of VALUE.
|
|
If we didn't like this approach, we could instead look in the
|
|
type_info object itself to get the class name. But this way
|
|
should work just as well, and doesn't read target memory. */
|
|
vtable_symbol_name = MSYMBOL_DEMANGLED_NAME (vtable_symbol);
|
|
if (vtable_symbol_name == NULL
|
|
|| !startswith (vtable_symbol_name, "vtable for "))
|
|
{
|
|
warning (_("can't find linker symbol for virtual table for `%s' value"),
|
|
TYPE_SAFE_NAME (values_type));
|
|
if (vtable_symbol_name)
|
|
warning (_(" found `%s' instead"), vtable_symbol_name);
|
|
return NULL;
|
|
}
|
|
class_name = vtable_symbol_name + 11;
|
|
|
|
/* Strip off @plt and version suffixes. */
|
|
atsign = strchr (class_name, '@');
|
|
if (atsign != NULL)
|
|
{
|
|
char *copy;
|
|
|
|
copy = (char *) alloca (atsign - class_name + 1);
|
|
memcpy (copy, class_name, atsign - class_name);
|
|
copy[atsign - class_name] = '\0';
|
|
class_name = copy;
|
|
}
|
|
|
|
/* Try to look up the class name as a type name. */
|
|
/* FIXME: chastain/2003-11-26: block=NULL is bogus. See pr gdb/1465. */
|
|
run_time_type = cp_lookup_rtti_type (class_name, NULL);
|
|
if (run_time_type == NULL)
|
|
return NULL;
|
|
|
|
/* Get the offset from VALUE to the top of the complete object.
|
|
NOTE: this is the reverse of the meaning of *TOP_P. */
|
|
offset_to_top
|
|
= value_as_long (value_field (vtable, vtable_field_offset_to_top));
|
|
|
|
if (full_p)
|
|
*full_p = (- offset_to_top == value_embedded_offset (value)
|
|
&& (TYPE_LENGTH (value_enclosing_type (value))
|
|
>= TYPE_LENGTH (run_time_type)));
|
|
if (top_p)
|
|
*top_p = - offset_to_top;
|
|
return run_time_type;
|
|
}
|
|
|
|
/* Return a function pointer for CONTAINER's VTABLE_INDEX'th virtual
|
|
function, of type FNTYPE. */
|
|
|
|
static struct value *
|
|
gnuv3_get_virtual_fn (struct gdbarch *gdbarch, struct value *container,
|
|
struct type *fntype, int vtable_index)
|
|
{
|
|
struct value *vtable, *vfn;
|
|
|
|
/* Every class with virtual functions must have a vtable. */
|
|
vtable = gnuv3_get_vtable (gdbarch, value_type (container),
|
|
value_as_address (value_addr (container)));
|
|
gdb_assert (vtable != NULL);
|
|
|
|
/* Fetch the appropriate function pointer from the vtable. */
|
|
vfn = value_subscript (value_field (vtable, vtable_field_virtual_functions),
|
|
vtable_index);
|
|
|
|
/* If this architecture uses function descriptors directly in the vtable,
|
|
then the address of the vtable entry is actually a "function pointer"
|
|
(i.e. points to the descriptor). We don't need to scale the index
|
|
by the size of a function descriptor; GCC does that before outputing
|
|
debug information. */
|
|
if (gdbarch_vtable_function_descriptors (gdbarch))
|
|
vfn = value_addr (vfn);
|
|
|
|
/* Cast the function pointer to the appropriate type. */
|
|
vfn = value_cast (lookup_pointer_type (fntype), vfn);
|
|
|
|
return vfn;
|
|
}
|
|
|
|
/* GNU v3 implementation of value_virtual_fn_field. See cp-abi.h
|
|
for a description of the arguments. */
|
|
|
|
static struct value *
|
|
gnuv3_virtual_fn_field (struct value **value_p,
|
|
struct fn_field *f, int j,
|
|
struct type *vfn_base, int offset)
|
|
{
|
|
struct type *values_type = check_typedef (value_type (*value_p));
|
|
struct gdbarch *gdbarch;
|
|
|
|
/* Some simple sanity checks. */
|
|
if (TYPE_CODE (values_type) != TYPE_CODE_STRUCT)
|
|
error (_("Only classes can have virtual functions."));
|
|
|
|
/* Determine architecture. */
|
|
gdbarch = get_type_arch (values_type);
|
|
|
|
/* Cast our value to the base class which defines this virtual
|
|
function. This takes care of any necessary `this'
|
|
adjustments. */
|
|
if (vfn_base != values_type)
|
|
*value_p = value_cast (vfn_base, *value_p);
|
|
|
|
return gnuv3_get_virtual_fn (gdbarch, *value_p, TYPE_FN_FIELD_TYPE (f, j),
|
|
TYPE_FN_FIELD_VOFFSET (f, j));
|
|
}
|
|
|
|
/* Compute the offset of the baseclass which is
|
|
the INDEXth baseclass of class TYPE,
|
|
for value at VALADDR (in host) at ADDRESS (in target).
|
|
The result is the offset of the baseclass value relative
|
|
to (the address of)(ARG) + OFFSET.
|
|
|
|
-1 is returned on error. */
|
|
|
|
static int
|
|
gnuv3_baseclass_offset (struct type *type, int index,
|
|
const bfd_byte *valaddr, int embedded_offset,
|
|
CORE_ADDR address, const struct value *val)
|
|
{
|
|
struct gdbarch *gdbarch;
|
|
struct type *ptr_type;
|
|
struct value *vtable;
|
|
struct value *vbase_array;
|
|
long int cur_base_offset, base_offset;
|
|
|
|
/* Determine architecture. */
|
|
gdbarch = get_type_arch (type);
|
|
ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
|
|
|
|
/* If it isn't a virtual base, this is easy. The offset is in the
|
|
type definition. Likewise for Java, which doesn't really have
|
|
virtual inheritance in the C++ sense. */
|
|
if (!BASETYPE_VIA_VIRTUAL (type, index) || TYPE_CPLUS_REALLY_JAVA (type))
|
|
return TYPE_BASECLASS_BITPOS (type, index) / 8;
|
|
|
|
/* To access a virtual base, we need to use the vbase offset stored in
|
|
our vtable. Recent GCC versions provide this information. If it isn't
|
|
available, we could get what we needed from RTTI, or from drawing the
|
|
complete inheritance graph based on the debug info. Neither is
|
|
worthwhile. */
|
|
cur_base_offset = TYPE_BASECLASS_BITPOS (type, index) / 8;
|
|
if (cur_base_offset >= - vtable_address_point_offset (gdbarch))
|
|
error (_("Expected a negative vbase offset (old compiler?)"));
|
|
|
|
cur_base_offset = cur_base_offset + vtable_address_point_offset (gdbarch);
|
|
if ((- cur_base_offset) % TYPE_LENGTH (ptr_type) != 0)
|
|
error (_("Misaligned vbase offset."));
|
|
cur_base_offset = cur_base_offset / ((int) TYPE_LENGTH (ptr_type));
|
|
|
|
vtable = gnuv3_get_vtable (gdbarch, type, address + embedded_offset);
|
|
gdb_assert (vtable != NULL);
|
|
vbase_array = value_field (vtable, vtable_field_vcall_and_vbase_offsets);
|
|
base_offset = value_as_long (value_subscript (vbase_array, cur_base_offset));
|
|
return base_offset;
|
|
}
|
|
|
|
/* Locate a virtual method in DOMAIN or its non-virtual base classes
|
|
which has virtual table index VOFFSET. The method has an associated
|
|
"this" adjustment of ADJUSTMENT bytes. */
|
|
|
|
static const char *
|
|
gnuv3_find_method_in (struct type *domain, CORE_ADDR voffset,
|
|
LONGEST adjustment)
|
|
{
|
|
int i;
|
|
|
|
/* Search this class first. */
|
|
if (adjustment == 0)
|
|
{
|
|
int len;
|
|
|
|
len = TYPE_NFN_FIELDS (domain);
|
|
for (i = 0; i < len; i++)
|
|
{
|
|
int len2, j;
|
|
struct fn_field *f;
|
|
|
|
f = TYPE_FN_FIELDLIST1 (domain, i);
|
|
len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
|
|
|
|
check_stub_method_group (domain, i);
|
|
for (j = 0; j < len2; j++)
|
|
if (TYPE_FN_FIELD_VOFFSET (f, j) == voffset)
|
|
return TYPE_FN_FIELD_PHYSNAME (f, j);
|
|
}
|
|
}
|
|
|
|
/* Next search non-virtual bases. If it's in a virtual base,
|
|
we're out of luck. */
|
|
for (i = 0; i < TYPE_N_BASECLASSES (domain); i++)
|
|
{
|
|
int pos;
|
|
struct type *basetype;
|
|
|
|
if (BASETYPE_VIA_VIRTUAL (domain, i))
|
|
continue;
|
|
|
|
pos = TYPE_BASECLASS_BITPOS (domain, i) / 8;
|
|
basetype = TYPE_FIELD_TYPE (domain, i);
|
|
/* Recurse with a modified adjustment. We don't need to adjust
|
|
voffset. */
|
|
if (adjustment >= pos && adjustment < pos + TYPE_LENGTH (basetype))
|
|
return gnuv3_find_method_in (basetype, voffset, adjustment - pos);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Decode GNU v3 method pointer. */
|
|
|
|
static int
|
|
gnuv3_decode_method_ptr (struct gdbarch *gdbarch,
|
|
const gdb_byte *contents,
|
|
CORE_ADDR *value_p,
|
|
LONGEST *adjustment_p)
|
|
{
|
|
struct type *funcptr_type = builtin_type (gdbarch)->builtin_func_ptr;
|
|
struct type *offset_type = vtable_ptrdiff_type (gdbarch);
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
CORE_ADDR ptr_value;
|
|
LONGEST voffset, adjustment;
|
|
int vbit;
|
|
|
|
/* Extract the pointer to member. The first element is either a pointer
|
|
or a vtable offset. For pointers, we need to use extract_typed_address
|
|
to allow the back-end to convert the pointer to a GDB address -- but
|
|
vtable offsets we must handle as integers. At this point, we do not
|
|
yet know which case we have, so we extract the value under both
|
|
interpretations and choose the right one later on. */
|
|
ptr_value = extract_typed_address (contents, funcptr_type);
|
|
voffset = extract_signed_integer (contents,
|
|
TYPE_LENGTH (funcptr_type), byte_order);
|
|
contents += TYPE_LENGTH (funcptr_type);
|
|
adjustment = extract_signed_integer (contents,
|
|
TYPE_LENGTH (offset_type), byte_order);
|
|
|
|
if (!gdbarch_vbit_in_delta (gdbarch))
|
|
{
|
|
vbit = voffset & 1;
|
|
voffset = voffset ^ vbit;
|
|
}
|
|
else
|
|
{
|
|
vbit = adjustment & 1;
|
|
adjustment = adjustment >> 1;
|
|
}
|
|
|
|
*value_p = vbit? voffset : ptr_value;
|
|
*adjustment_p = adjustment;
|
|
return vbit;
|
|
}
|
|
|
|
/* GNU v3 implementation of cplus_print_method_ptr. */
|
|
|
|
static void
|
|
gnuv3_print_method_ptr (const gdb_byte *contents,
|
|
struct type *type,
|
|
struct ui_file *stream)
|
|
{
|
|
struct type *self_type = TYPE_SELF_TYPE (type);
|
|
struct gdbarch *gdbarch = get_type_arch (self_type);
|
|
CORE_ADDR ptr_value;
|
|
LONGEST adjustment;
|
|
int vbit;
|
|
|
|
/* Extract the pointer to member. */
|
|
vbit = gnuv3_decode_method_ptr (gdbarch, contents, &ptr_value, &adjustment);
|
|
|
|
/* Check for NULL. */
|
|
if (ptr_value == 0 && vbit == 0)
|
|
{
|
|
fprintf_filtered (stream, "NULL");
|
|
return;
|
|
}
|
|
|
|
/* Search for a virtual method. */
|
|
if (vbit)
|
|
{
|
|
CORE_ADDR voffset;
|
|
const char *physname;
|
|
|
|
/* It's a virtual table offset, maybe in this class. Search
|
|
for a field with the correct vtable offset. First convert it
|
|
to an index, as used in TYPE_FN_FIELD_VOFFSET. */
|
|
voffset = ptr_value / TYPE_LENGTH (vtable_ptrdiff_type (gdbarch));
|
|
|
|
physname = gnuv3_find_method_in (self_type, voffset, adjustment);
|
|
|
|
/* If we found a method, print that. We don't bother to disambiguate
|
|
possible paths to the method based on the adjustment. */
|
|
if (physname)
|
|
{
|
|
char *demangled_name = gdb_demangle (physname,
|
|
DMGL_ANSI | DMGL_PARAMS);
|
|
|
|
fprintf_filtered (stream, "&virtual ");
|
|
if (demangled_name == NULL)
|
|
fputs_filtered (physname, stream);
|
|
else
|
|
{
|
|
fputs_filtered (demangled_name, stream);
|
|
xfree (demangled_name);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
else if (ptr_value != 0)
|
|
{
|
|
/* Found a non-virtual function: print out the type. */
|
|
fputs_filtered ("(", stream);
|
|
c_print_type (type, "", stream, -1, 0, &type_print_raw_options);
|
|
fputs_filtered (") ", stream);
|
|
}
|
|
|
|
/* We didn't find it; print the raw data. */
|
|
if (vbit)
|
|
{
|
|
fprintf_filtered (stream, "&virtual table offset ");
|
|
print_longest (stream, 'd', 1, ptr_value);
|
|
}
|
|
else
|
|
{
|
|
struct value_print_options opts;
|
|
|
|
get_user_print_options (&opts);
|
|
print_address_demangle (&opts, gdbarch, ptr_value, stream, demangle);
|
|
}
|
|
|
|
if (adjustment)
|
|
{
|
|
fprintf_filtered (stream, ", this adjustment ");
|
|
print_longest (stream, 'd', 1, adjustment);
|
|
}
|
|
}
|
|
|
|
/* GNU v3 implementation of cplus_method_ptr_size. */
|
|
|
|
static int
|
|
gnuv3_method_ptr_size (struct type *type)
|
|
{
|
|
struct gdbarch *gdbarch = get_type_arch (type);
|
|
|
|
return 2 * TYPE_LENGTH (builtin_type (gdbarch)->builtin_data_ptr);
|
|
}
|
|
|
|
/* GNU v3 implementation of cplus_make_method_ptr. */
|
|
|
|
static void
|
|
gnuv3_make_method_ptr (struct type *type, gdb_byte *contents,
|
|
CORE_ADDR value, int is_virtual)
|
|
{
|
|
struct gdbarch *gdbarch = get_type_arch (type);
|
|
int size = TYPE_LENGTH (builtin_type (gdbarch)->builtin_data_ptr);
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
|
|
/* FIXME drow/2006-12-24: The adjustment of "this" is currently
|
|
always zero, since the method pointer is of the correct type.
|
|
But if the method pointer came from a base class, this is
|
|
incorrect - it should be the offset to the base. The best
|
|
fix might be to create the pointer to member pointing at the
|
|
base class and cast it to the derived class, but that requires
|
|
support for adjusting pointers to members when casting them -
|
|
not currently supported by GDB. */
|
|
|
|
if (!gdbarch_vbit_in_delta (gdbarch))
|
|
{
|
|
store_unsigned_integer (contents, size, byte_order, value | is_virtual);
|
|
store_unsigned_integer (contents + size, size, byte_order, 0);
|
|
}
|
|
else
|
|
{
|
|
store_unsigned_integer (contents, size, byte_order, value);
|
|
store_unsigned_integer (contents + size, size, byte_order, is_virtual);
|
|
}
|
|
}
|
|
|
|
/* GNU v3 implementation of cplus_method_ptr_to_value. */
|
|
|
|
static struct value *
|
|
gnuv3_method_ptr_to_value (struct value **this_p, struct value *method_ptr)
|
|
{
|
|
struct gdbarch *gdbarch;
|
|
const gdb_byte *contents = value_contents (method_ptr);
|
|
CORE_ADDR ptr_value;
|
|
struct type *self_type, *final_type, *method_type;
|
|
LONGEST adjustment;
|
|
int vbit;
|
|
|
|
self_type = TYPE_SELF_TYPE (check_typedef (value_type (method_ptr)));
|
|
final_type = lookup_pointer_type (self_type);
|
|
|
|
method_type = TYPE_TARGET_TYPE (check_typedef (value_type (method_ptr)));
|
|
|
|
/* Extract the pointer to member. */
|
|
gdbarch = get_type_arch (self_type);
|
|
vbit = gnuv3_decode_method_ptr (gdbarch, contents, &ptr_value, &adjustment);
|
|
|
|
/* First convert THIS to match the containing type of the pointer to
|
|
member. This cast may adjust the value of THIS. */
|
|
*this_p = value_cast (final_type, *this_p);
|
|
|
|
/* Then apply whatever adjustment is necessary. This creates a somewhat
|
|
strange pointer: it claims to have type FINAL_TYPE, but in fact it
|
|
might not be a valid FINAL_TYPE. For instance, it might be a
|
|
base class of FINAL_TYPE. And if it's not the primary base class,
|
|
then printing it out as a FINAL_TYPE object would produce some pretty
|
|
garbage.
|
|
|
|
But we don't really know the type of the first argument in
|
|
METHOD_TYPE either, which is why this happens. We can't
|
|
dereference this later as a FINAL_TYPE, but once we arrive in the
|
|
called method we'll have debugging information for the type of
|
|
"this" - and that'll match the value we produce here.
|
|
|
|
You can provoke this case by casting a Base::* to a Derived::*, for
|
|
instance. */
|
|
*this_p = value_cast (builtin_type (gdbarch)->builtin_data_ptr, *this_p);
|
|
*this_p = value_ptradd (*this_p, adjustment);
|
|
*this_p = value_cast (final_type, *this_p);
|
|
|
|
if (vbit)
|
|
{
|
|
LONGEST voffset;
|
|
|
|
voffset = ptr_value / TYPE_LENGTH (vtable_ptrdiff_type (gdbarch));
|
|
return gnuv3_get_virtual_fn (gdbarch, value_ind (*this_p),
|
|
method_type, voffset);
|
|
}
|
|
else
|
|
return value_from_pointer (lookup_pointer_type (method_type), ptr_value);
|
|
}
|
|
|
|
/* Objects of this type are stored in a hash table and a vector when
|
|
printing the vtables for a class. */
|
|
|
|
struct value_and_voffset
|
|
{
|
|
/* The value representing the object. */
|
|
struct value *value;
|
|
|
|
/* The maximum vtable offset we've found for any object at this
|
|
offset in the outermost object. */
|
|
int max_voffset;
|
|
};
|
|
|
|
typedef struct value_and_voffset *value_and_voffset_p;
|
|
DEF_VEC_P (value_and_voffset_p);
|
|
|
|
/* Hash function for value_and_voffset. */
|
|
|
|
static hashval_t
|
|
hash_value_and_voffset (const void *p)
|
|
{
|
|
const struct value_and_voffset *o = (const struct value_and_voffset *) p;
|
|
|
|
return value_address (o->value) + value_embedded_offset (o->value);
|
|
}
|
|
|
|
/* Equality function for value_and_voffset. */
|
|
|
|
static int
|
|
eq_value_and_voffset (const void *a, const void *b)
|
|
{
|
|
const struct value_and_voffset *ova = (const struct value_and_voffset *) a;
|
|
const struct value_and_voffset *ovb = (const struct value_and_voffset *) b;
|
|
|
|
return (value_address (ova->value) + value_embedded_offset (ova->value)
|
|
== value_address (ovb->value) + value_embedded_offset (ovb->value));
|
|
}
|
|
|
|
/* qsort comparison function for value_and_voffset. */
|
|
|
|
static int
|
|
compare_value_and_voffset (const void *a, const void *b)
|
|
{
|
|
const struct value_and_voffset * const *ova
|
|
= (const struct value_and_voffset * const *) a;
|
|
CORE_ADDR addra = (value_address ((*ova)->value)
|
|
+ value_embedded_offset ((*ova)->value));
|
|
const struct value_and_voffset * const *ovb
|
|
= (const struct value_and_voffset * const *) b;
|
|
CORE_ADDR addrb = (value_address ((*ovb)->value)
|
|
+ value_embedded_offset ((*ovb)->value));
|
|
|
|
if (addra < addrb)
|
|
return -1;
|
|
if (addra > addrb)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/* A helper function used when printing vtables. This determines the
|
|
key (most derived) sub-object at each address and also computes the
|
|
maximum vtable offset seen for the corresponding vtable. Updates
|
|
OFFSET_HASH and OFFSET_VEC with a new value_and_voffset object, if
|
|
needed. VALUE is the object to examine. */
|
|
|
|
static void
|
|
compute_vtable_size (htab_t offset_hash,
|
|
VEC (value_and_voffset_p) **offset_vec,
|
|
struct value *value)
|
|
{
|
|
int i;
|
|
struct type *type = check_typedef (value_type (value));
|
|
void **slot;
|
|
struct value_and_voffset search_vo, *current_vo;
|
|
|
|
gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT);
|
|
|
|
/* If the object is not dynamic, then we are done; as it cannot have
|
|
dynamic base types either. */
|
|
if (!gnuv3_dynamic_class (type))
|
|
return;
|
|
|
|
/* Update the hash and the vec, if needed. */
|
|
search_vo.value = value;
|
|
slot = htab_find_slot (offset_hash, &search_vo, INSERT);
|
|
if (*slot)
|
|
current_vo = (struct value_and_voffset *) *slot;
|
|
else
|
|
{
|
|
current_vo = XNEW (struct value_and_voffset);
|
|
current_vo->value = value;
|
|
current_vo->max_voffset = -1;
|
|
*slot = current_vo;
|
|
VEC_safe_push (value_and_voffset_p, *offset_vec, current_vo);
|
|
}
|
|
|
|
/* Update the value_and_voffset object with the highest vtable
|
|
offset from this class. */
|
|
for (i = 0; i < TYPE_NFN_FIELDS (type); ++i)
|
|
{
|
|
int j;
|
|
struct fn_field *fn = TYPE_FN_FIELDLIST1 (type, i);
|
|
|
|
for (j = 0; j < TYPE_FN_FIELDLIST_LENGTH (type, i); ++j)
|
|
{
|
|
if (TYPE_FN_FIELD_VIRTUAL_P (fn, j))
|
|
{
|
|
int voffset = TYPE_FN_FIELD_VOFFSET (fn, j);
|
|
|
|
if (voffset > current_vo->max_voffset)
|
|
current_vo->max_voffset = voffset;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Recurse into base classes. */
|
|
for (i = 0; i < TYPE_N_BASECLASSES (type); ++i)
|
|
compute_vtable_size (offset_hash, offset_vec, value_field (value, i));
|
|
}
|
|
|
|
/* Helper for gnuv3_print_vtable that prints a single vtable. */
|
|
|
|
static void
|
|
print_one_vtable (struct gdbarch *gdbarch, struct value *value,
|
|
int max_voffset,
|
|
struct value_print_options *opts)
|
|
{
|
|
int i;
|
|
struct type *type = check_typedef (value_type (value));
|
|
struct value *vtable;
|
|
CORE_ADDR vt_addr;
|
|
|
|
vtable = gnuv3_get_vtable (gdbarch, type,
|
|
value_address (value)
|
|
+ value_embedded_offset (value));
|
|
vt_addr = value_address (value_field (vtable,
|
|
vtable_field_virtual_functions));
|
|
|
|
printf_filtered (_("vtable for '%s' @ %s (subobject @ %s):\n"),
|
|
TYPE_SAFE_NAME (type),
|
|
paddress (gdbarch, vt_addr),
|
|
paddress (gdbarch, (value_address (value)
|
|
+ value_embedded_offset (value))));
|
|
|
|
for (i = 0; i <= max_voffset; ++i)
|
|
{
|
|
/* Initialize it just to avoid a GCC false warning. */
|
|
CORE_ADDR addr = 0;
|
|
int got_error = 0;
|
|
struct value *vfn;
|
|
|
|
printf_filtered ("[%d]: ", i);
|
|
|
|
vfn = value_subscript (value_field (vtable,
|
|
vtable_field_virtual_functions),
|
|
i);
|
|
|
|
if (gdbarch_vtable_function_descriptors (gdbarch))
|
|
vfn = value_addr (vfn);
|
|
|
|
TRY
|
|
{
|
|
addr = value_as_address (vfn);
|
|
}
|
|
CATCH (ex, RETURN_MASK_ERROR)
|
|
{
|
|
printf_filtered (_("<error: %s>"), ex.message);
|
|
got_error = 1;
|
|
}
|
|
END_CATCH
|
|
|
|
if (!got_error)
|
|
print_function_pointer_address (opts, gdbarch, addr, gdb_stdout);
|
|
printf_filtered ("\n");
|
|
}
|
|
}
|
|
|
|
/* Implementation of the print_vtable method. */
|
|
|
|
static void
|
|
gnuv3_print_vtable (struct value *value)
|
|
{
|
|
struct gdbarch *gdbarch;
|
|
struct type *type;
|
|
struct value *vtable;
|
|
struct value_print_options opts;
|
|
htab_t offset_hash;
|
|
struct cleanup *cleanup;
|
|
VEC (value_and_voffset_p) *result_vec = NULL;
|
|
struct value_and_voffset *iter;
|
|
int i, count;
|
|
|
|
value = coerce_ref (value);
|
|
type = check_typedef (value_type (value));
|
|
if (TYPE_CODE (type) == TYPE_CODE_PTR)
|
|
{
|
|
value = value_ind (value);
|
|
type = check_typedef (value_type (value));
|
|
}
|
|
|
|
get_user_print_options (&opts);
|
|
|
|
/* Respect 'set print object'. */
|
|
if (opts.objectprint)
|
|
{
|
|
value = value_full_object (value, NULL, 0, 0, 0);
|
|
type = check_typedef (value_type (value));
|
|
}
|
|
|
|
gdbarch = get_type_arch (type);
|
|
|
|
vtable = NULL;
|
|
if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
|
|
vtable = gnuv3_get_vtable (gdbarch, type,
|
|
value_as_address (value_addr (value)));
|
|
|
|
if (!vtable)
|
|
{
|
|
printf_filtered (_("This object does not have a virtual function table\n"));
|
|
return;
|
|
}
|
|
|
|
offset_hash = htab_create_alloc (1, hash_value_and_voffset,
|
|
eq_value_and_voffset,
|
|
xfree, xcalloc, xfree);
|
|
cleanup = make_cleanup_htab_delete (offset_hash);
|
|
make_cleanup (VEC_cleanup (value_and_voffset_p), &result_vec);
|
|
|
|
compute_vtable_size (offset_hash, &result_vec, value);
|
|
|
|
qsort (VEC_address (value_and_voffset_p, result_vec),
|
|
VEC_length (value_and_voffset_p, result_vec),
|
|
sizeof (value_and_voffset_p),
|
|
compare_value_and_voffset);
|
|
|
|
count = 0;
|
|
for (i = 0; VEC_iterate (value_and_voffset_p, result_vec, i, iter); ++i)
|
|
{
|
|
if (iter->max_voffset >= 0)
|
|
{
|
|
if (count > 0)
|
|
printf_filtered ("\n");
|
|
print_one_vtable (gdbarch, iter->value, iter->max_voffset, &opts);
|
|
++count;
|
|
}
|
|
}
|
|
|
|
do_cleanups (cleanup);
|
|
}
|
|
|
|
/* Return a GDB type representing `struct std::type_info', laid out
|
|
appropriately for ARCH.
|
|
|
|
We use this function as the gdbarch per-architecture data
|
|
initialization function. */
|
|
|
|
static void *
|
|
build_std_type_info_type (struct gdbarch *arch)
|
|
{
|
|
struct type *t;
|
|
struct field *field_list, *field;
|
|
int offset;
|
|
struct type *void_ptr_type
|
|
= builtin_type (arch)->builtin_data_ptr;
|
|
struct type *char_type
|
|
= builtin_type (arch)->builtin_char;
|
|
struct type *char_ptr_type
|
|
= make_pointer_type (make_cv_type (1, 0, char_type, NULL), NULL);
|
|
|
|
field_list = XCNEWVEC (struct field, 2);
|
|
field = &field_list[0];
|
|
offset = 0;
|
|
|
|
/* The vtable. */
|
|
FIELD_NAME (*field) = "_vptr.type_info";
|
|
FIELD_TYPE (*field) = void_ptr_type;
|
|
SET_FIELD_BITPOS (*field, offset * TARGET_CHAR_BIT);
|
|
offset += TYPE_LENGTH (FIELD_TYPE (*field));
|
|
field++;
|
|
|
|
/* The name. */
|
|
FIELD_NAME (*field) = "__name";
|
|
FIELD_TYPE (*field) = char_ptr_type;
|
|
SET_FIELD_BITPOS (*field, offset * TARGET_CHAR_BIT);
|
|
offset += TYPE_LENGTH (FIELD_TYPE (*field));
|
|
field++;
|
|
|
|
gdb_assert (field == (field_list + 2));
|
|
|
|
t = arch_type (arch, TYPE_CODE_STRUCT, offset, NULL);
|
|
TYPE_NFIELDS (t) = field - field_list;
|
|
TYPE_FIELDS (t) = field_list;
|
|
TYPE_TAG_NAME (t) = "gdb_gnu_v3_type_info";
|
|
INIT_CPLUS_SPECIFIC (t);
|
|
|
|
return t;
|
|
}
|
|
|
|
/* Implement the 'get_typeid_type' method. */
|
|
|
|
static struct type *
|
|
gnuv3_get_typeid_type (struct gdbarch *gdbarch)
|
|
{
|
|
struct symbol *typeinfo;
|
|
struct type *typeinfo_type;
|
|
|
|
typeinfo = lookup_symbol ("std::type_info", NULL, STRUCT_DOMAIN,
|
|
NULL).symbol;
|
|
if (typeinfo == NULL)
|
|
typeinfo_type
|
|
= (struct type *) gdbarch_data (gdbarch, std_type_info_gdbarch_data);
|
|
else
|
|
typeinfo_type = SYMBOL_TYPE (typeinfo);
|
|
|
|
return typeinfo_type;
|
|
}
|
|
|
|
/* Implement the 'get_typeid' method. */
|
|
|
|
static struct value *
|
|
gnuv3_get_typeid (struct value *value)
|
|
{
|
|
struct type *typeinfo_type;
|
|
struct type *type;
|
|
struct gdbarch *gdbarch;
|
|
struct cleanup *cleanup;
|
|
struct value *result;
|
|
char *type_name, *canonical;
|
|
|
|
/* We have to handle values a bit trickily here, to allow this code
|
|
to work properly with non_lvalue values that are really just
|
|
disguised types. */
|
|
if (value_lval_const (value) == lval_memory)
|
|
value = coerce_ref (value);
|
|
|
|
type = check_typedef (value_type (value));
|
|
|
|
/* In the non_lvalue case, a reference might have slipped through
|
|
here. */
|
|
if (TYPE_CODE (type) == TYPE_CODE_REF)
|
|
type = check_typedef (TYPE_TARGET_TYPE (type));
|
|
|
|
/* Ignore top-level cv-qualifiers. */
|
|
type = make_cv_type (0, 0, type, NULL);
|
|
gdbarch = get_type_arch (type);
|
|
|
|
type_name = type_to_string (type);
|
|
if (type_name == NULL)
|
|
error (_("cannot find typeinfo for unnamed type"));
|
|
cleanup = make_cleanup (xfree, type_name);
|
|
|
|
/* We need to canonicalize the type name here, because we do lookups
|
|
using the demangled name, and so we must match the format it
|
|
uses. E.g., GDB tends to use "const char *" as a type name, but
|
|
the demangler uses "char const *". */
|
|
canonical = cp_canonicalize_string (type_name);
|
|
if (canonical != NULL)
|
|
{
|
|
make_cleanup (xfree, canonical);
|
|
type_name = canonical;
|
|
}
|
|
|
|
typeinfo_type = gnuv3_get_typeid_type (gdbarch);
|
|
|
|
/* We check for lval_memory because in the "typeid (type-id)" case,
|
|
the type is passed via a not_lval value object. */
|
|
if (TYPE_CODE (type) == TYPE_CODE_STRUCT
|
|
&& value_lval_const (value) == lval_memory
|
|
&& gnuv3_dynamic_class (type))
|
|
{
|
|
struct value *vtable, *typeinfo_value;
|
|
CORE_ADDR address = value_address (value) + value_embedded_offset (value);
|
|
|
|
vtable = gnuv3_get_vtable (gdbarch, type, address);
|
|
if (vtable == NULL)
|
|
error (_("cannot find typeinfo for object of type '%s'"), type_name);
|
|
typeinfo_value = value_field (vtable, vtable_field_type_info);
|
|
result = value_ind (value_cast (make_pointer_type (typeinfo_type, NULL),
|
|
typeinfo_value));
|
|
}
|
|
else
|
|
{
|
|
char *sym_name;
|
|
struct bound_minimal_symbol minsym;
|
|
|
|
sym_name = concat ("typeinfo for ", type_name, (char *) NULL);
|
|
make_cleanup (xfree, sym_name);
|
|
minsym = lookup_minimal_symbol (sym_name, NULL, NULL);
|
|
|
|
if (minsym.minsym == NULL)
|
|
error (_("could not find typeinfo symbol for '%s'"), type_name);
|
|
|
|
result = value_at_lazy (typeinfo_type, BMSYMBOL_VALUE_ADDRESS (minsym));
|
|
}
|
|
|
|
do_cleanups (cleanup);
|
|
return result;
|
|
}
|
|
|
|
/* Implement the 'get_typename_from_type_info' method. */
|
|
|
|
static char *
|
|
gnuv3_get_typename_from_type_info (struct value *type_info_ptr)
|
|
{
|
|
struct gdbarch *gdbarch = get_type_arch (value_type (type_info_ptr));
|
|
struct bound_minimal_symbol typeinfo_sym;
|
|
CORE_ADDR addr;
|
|
const char *symname;
|
|
const char *class_name;
|
|
const char *atsign;
|
|
|
|
addr = value_as_address (type_info_ptr);
|
|
typeinfo_sym = lookup_minimal_symbol_by_pc (addr);
|
|
if (typeinfo_sym.minsym == NULL)
|
|
error (_("could not find minimal symbol for typeinfo address %s"),
|
|
paddress (gdbarch, addr));
|
|
|
|
#define TYPEINFO_PREFIX "typeinfo for "
|
|
#define TYPEINFO_PREFIX_LEN (sizeof (TYPEINFO_PREFIX) - 1)
|
|
symname = MSYMBOL_DEMANGLED_NAME (typeinfo_sym.minsym);
|
|
if (symname == NULL || strncmp (symname, TYPEINFO_PREFIX,
|
|
TYPEINFO_PREFIX_LEN))
|
|
error (_("typeinfo symbol '%s' has unexpected name"),
|
|
MSYMBOL_LINKAGE_NAME (typeinfo_sym.minsym));
|
|
class_name = symname + TYPEINFO_PREFIX_LEN;
|
|
|
|
/* Strip off @plt and version suffixes. */
|
|
atsign = strchr (class_name, '@');
|
|
if (atsign != NULL)
|
|
return savestring (class_name, atsign - class_name);
|
|
return xstrdup (class_name);
|
|
}
|
|
|
|
/* Implement the 'get_type_from_type_info' method. */
|
|
|
|
static struct type *
|
|
gnuv3_get_type_from_type_info (struct value *type_info_ptr)
|
|
{
|
|
char *type_name;
|
|
struct cleanup *cleanup;
|
|
struct value *type_val;
|
|
struct expression *expr;
|
|
struct type *result;
|
|
|
|
type_name = gnuv3_get_typename_from_type_info (type_info_ptr);
|
|
cleanup = make_cleanup (xfree, type_name);
|
|
|
|
/* We have to parse the type name, since in general there is not a
|
|
symbol for a type. This is somewhat bogus since there may be a
|
|
mis-parse. Another approach might be to re-use the demangler's
|
|
internal form to reconstruct the type somehow. */
|
|
|
|
expr = parse_expression (type_name);
|
|
make_cleanup (xfree, expr);
|
|
|
|
type_val = evaluate_type (expr);
|
|
result = value_type (type_val);
|
|
|
|
do_cleanups (cleanup);
|
|
return result;
|
|
}
|
|
|
|
/* Determine if we are currently in a C++ thunk. If so, get the address
|
|
of the routine we are thunking to and continue to there instead. */
|
|
|
|
static CORE_ADDR
|
|
gnuv3_skip_trampoline (struct frame_info *frame, CORE_ADDR stop_pc)
|
|
{
|
|
CORE_ADDR real_stop_pc, method_stop_pc, func_addr;
|
|
struct gdbarch *gdbarch = get_frame_arch (frame);
|
|
struct bound_minimal_symbol thunk_sym, fn_sym;
|
|
struct obj_section *section;
|
|
const char *thunk_name, *fn_name;
|
|
|
|
real_stop_pc = gdbarch_skip_trampoline_code (gdbarch, frame, stop_pc);
|
|
if (real_stop_pc == 0)
|
|
real_stop_pc = stop_pc;
|
|
|
|
/* Find the linker symbol for this potential thunk. */
|
|
thunk_sym = lookup_minimal_symbol_by_pc (real_stop_pc);
|
|
section = find_pc_section (real_stop_pc);
|
|
if (thunk_sym.minsym == NULL || section == NULL)
|
|
return 0;
|
|
|
|
/* The symbol's demangled name should be something like "virtual
|
|
thunk to FUNCTION", where FUNCTION is the name of the function
|
|
being thunked to. */
|
|
thunk_name = MSYMBOL_DEMANGLED_NAME (thunk_sym.minsym);
|
|
if (thunk_name == NULL || strstr (thunk_name, " thunk to ") == NULL)
|
|
return 0;
|
|
|
|
fn_name = strstr (thunk_name, " thunk to ") + strlen (" thunk to ");
|
|
fn_sym = lookup_minimal_symbol (fn_name, NULL, section->objfile);
|
|
if (fn_sym.minsym == NULL)
|
|
return 0;
|
|
|
|
method_stop_pc = BMSYMBOL_VALUE_ADDRESS (fn_sym);
|
|
|
|
/* Some targets have minimal symbols pointing to function descriptors
|
|
(powerpc 64 for example). Make sure to retrieve the address
|
|
of the real function from the function descriptor before passing on
|
|
the address to other layers of GDB. */
|
|
func_addr = gdbarch_convert_from_func_ptr_addr (gdbarch, method_stop_pc,
|
|
¤t_target);
|
|
if (func_addr != 0)
|
|
method_stop_pc = func_addr;
|
|
|
|
real_stop_pc = gdbarch_skip_trampoline_code
|
|
(gdbarch, frame, method_stop_pc);
|
|
if (real_stop_pc == 0)
|
|
real_stop_pc = method_stop_pc;
|
|
|
|
return real_stop_pc;
|
|
}
|
|
|
|
/* Return nonzero if a type should be passed by reference.
|
|
|
|
The rule in the v3 ABI document comes from section 3.1.1. If the
|
|
type has a non-trivial copy constructor or destructor, then the
|
|
caller must make a copy (by calling the copy constructor if there
|
|
is one or perform the copy itself otherwise), pass the address of
|
|
the copy, and then destroy the temporary (if necessary).
|
|
|
|
For return values with non-trivial copy constructors or
|
|
destructors, space will be allocated in the caller, and a pointer
|
|
will be passed as the first argument (preceding "this").
|
|
|
|
We don't have a bulletproof mechanism for determining whether a
|
|
constructor or destructor is trivial. For GCC and DWARF2 debug
|
|
information, we can check the artificial flag.
|
|
|
|
We don't do anything with the constructors or destructors,
|
|
but we have to get the argument passing right anyway. */
|
|
static int
|
|
gnuv3_pass_by_reference (struct type *type)
|
|
{
|
|
int fieldnum, fieldelem;
|
|
|
|
type = check_typedef (type);
|
|
|
|
/* We're only interested in things that can have methods. */
|
|
if (TYPE_CODE (type) != TYPE_CODE_STRUCT
|
|
&& TYPE_CODE (type) != TYPE_CODE_UNION)
|
|
return 0;
|
|
|
|
/* A dynamic class has a non-trivial copy constructor.
|
|
See c++98 section 12.8 Copying class objects [class.copy]. */
|
|
if (gnuv3_dynamic_class (type))
|
|
return 1;
|
|
|
|
for (fieldnum = 0; fieldnum < TYPE_NFN_FIELDS (type); fieldnum++)
|
|
for (fieldelem = 0; fieldelem < TYPE_FN_FIELDLIST_LENGTH (type, fieldnum);
|
|
fieldelem++)
|
|
{
|
|
struct fn_field *fn = TYPE_FN_FIELDLIST1 (type, fieldnum);
|
|
const char *name = TYPE_FN_FIELDLIST_NAME (type, fieldnum);
|
|
struct type *fieldtype = TYPE_FN_FIELD_TYPE (fn, fieldelem);
|
|
|
|
/* If this function is marked as artificial, it is compiler-generated,
|
|
and we assume it is trivial. */
|
|
if (TYPE_FN_FIELD_ARTIFICIAL (fn, fieldelem))
|
|
continue;
|
|
|
|
/* If we've found a destructor, we must pass this by reference. */
|
|
if (name[0] == '~')
|
|
return 1;
|
|
|
|
/* If the mangled name of this method doesn't indicate that it
|
|
is a constructor, we're not interested.
|
|
|
|
FIXME drow/2007-09-23: We could do this using the name of
|
|
the method and the name of the class instead of dealing
|
|
with the mangled name. We don't have a convenient function
|
|
to strip off both leading scope qualifiers and trailing
|
|
template arguments yet. */
|
|
if (!is_constructor_name (TYPE_FN_FIELD_PHYSNAME (fn, fieldelem))
|
|
&& !TYPE_FN_FIELD_CONSTRUCTOR (fn, fieldelem))
|
|
continue;
|
|
|
|
/* If this method takes two arguments, and the second argument is
|
|
a reference to this class, then it is a copy constructor. */
|
|
if (TYPE_NFIELDS (fieldtype) == 2)
|
|
{
|
|
struct type *arg_type = TYPE_FIELD_TYPE (fieldtype, 1);
|
|
|
|
if (TYPE_CODE (arg_type) == TYPE_CODE_REF)
|
|
{
|
|
struct type *arg_target_type;
|
|
|
|
arg_target_type = check_typedef (TYPE_TARGET_TYPE (arg_type));
|
|
if (class_types_same_p (arg_target_type, type))
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Even if all the constructors and destructors were artificial, one
|
|
of them may have invoked a non-artificial constructor or
|
|
destructor in a base class. If any base class needs to be passed
|
|
by reference, so does this class. Similarly for members, which
|
|
are constructed whenever this class is. We do not need to worry
|
|
about recursive loops here, since we are only looking at members
|
|
of complete class type. Also ignore any static members. */
|
|
for (fieldnum = 0; fieldnum < TYPE_NFIELDS (type); fieldnum++)
|
|
if (! field_is_static (&TYPE_FIELD (type, fieldnum))
|
|
&& gnuv3_pass_by_reference (TYPE_FIELD_TYPE (type, fieldnum)))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
init_gnuv3_ops (void)
|
|
{
|
|
vtable_type_gdbarch_data
|
|
= gdbarch_data_register_post_init (build_gdb_vtable_type);
|
|
std_type_info_gdbarch_data
|
|
= gdbarch_data_register_post_init (build_std_type_info_type);
|
|
|
|
gnu_v3_abi_ops.shortname = "gnu-v3";
|
|
gnu_v3_abi_ops.longname = "GNU G++ Version 3 ABI";
|
|
gnu_v3_abi_ops.doc = "G++ Version 3 ABI";
|
|
gnu_v3_abi_ops.is_destructor_name =
|
|
(enum dtor_kinds (*) (const char *))is_gnu_v3_mangled_dtor;
|
|
gnu_v3_abi_ops.is_constructor_name =
|
|
(enum ctor_kinds (*) (const char *))is_gnu_v3_mangled_ctor;
|
|
gnu_v3_abi_ops.is_vtable_name = gnuv3_is_vtable_name;
|
|
gnu_v3_abi_ops.is_operator_name = gnuv3_is_operator_name;
|
|
gnu_v3_abi_ops.rtti_type = gnuv3_rtti_type;
|
|
gnu_v3_abi_ops.virtual_fn_field = gnuv3_virtual_fn_field;
|
|
gnu_v3_abi_ops.baseclass_offset = gnuv3_baseclass_offset;
|
|
gnu_v3_abi_ops.print_method_ptr = gnuv3_print_method_ptr;
|
|
gnu_v3_abi_ops.method_ptr_size = gnuv3_method_ptr_size;
|
|
gnu_v3_abi_ops.make_method_ptr = gnuv3_make_method_ptr;
|
|
gnu_v3_abi_ops.method_ptr_to_value = gnuv3_method_ptr_to_value;
|
|
gnu_v3_abi_ops.print_vtable = gnuv3_print_vtable;
|
|
gnu_v3_abi_ops.get_typeid = gnuv3_get_typeid;
|
|
gnu_v3_abi_ops.get_typeid_type = gnuv3_get_typeid_type;
|
|
gnu_v3_abi_ops.get_type_from_type_info = gnuv3_get_type_from_type_info;
|
|
gnu_v3_abi_ops.get_typename_from_type_info
|
|
= gnuv3_get_typename_from_type_info;
|
|
gnu_v3_abi_ops.skip_trampoline = gnuv3_skip_trampoline;
|
|
gnu_v3_abi_ops.pass_by_reference = gnuv3_pass_by_reference;
|
|
}
|
|
|
|
extern initialize_file_ftype _initialize_gnu_v3_abi; /* -Wmissing-prototypes */
|
|
|
|
void
|
|
_initialize_gnu_v3_abi (void)
|
|
{
|
|
init_gnuv3_ops ();
|
|
|
|
register_cp_abi (&gnu_v3_abi_ops);
|
|
set_cp_abi_as_auto_default (gnu_v3_abi_ops.shortname);
|
|
}
|