From 529908cbd0afc2524044b7df3626c09d0bdae12d Mon Sep 17 00:00:00 2001 From: Tom Tromey Date: Tue, 29 Sep 2020 18:49:08 -0600 Subject: [PATCH] Remove DW_UNSND This removes DW_UNSND, replacing uses with either as_unsigned or constant_value, depending primarily on whether or not the form is already known to be appropriate. gdb/ChangeLog 2020-09-29 Tom Tromey * dwarf2/read.c (lookup_dwo_id, get_type_unit_group) (read_file_scope, dwarf2_get_pc_bounds) (dwarf2_record_block_ranges, dwarf2_add_field, get_alignment) (read_structure_type, handle_struct_member_die) (read_enumeration_type, read_array_type, read_set_type) (read_tag_pointer_type, read_tag_reference_type) (read_subroutine_type, read_base_type, read_subrange_type) (read_full_die_1, partial_die_info::read) (partial_die_info::read, by, new_symbol) (dwarf2_const_value_data, dwarf2_const_value_attr) (dump_die_shallow, dwarf2_fetch_constant_bytes) (prepare_one_comp_unit): Update. * dwarf2/attribute.h (DW_UNSND): Remove. --- gdb/ChangeLog | 16 ++++ gdb/dwarf2/attribute.h | 4 - gdb/dwarf2/read.c | 171 +++++++++++++++++++++-------------------- 3 files changed, 102 insertions(+), 89 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 27a77f1d52d..9c802c57ef4 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,19 @@ +2020-09-29 Tom Tromey + + * dwarf2/read.c (lookup_dwo_id, get_type_unit_group) + (read_file_scope, dwarf2_get_pc_bounds) + (dwarf2_record_block_ranges, dwarf2_add_field, get_alignment) + (read_structure_type, handle_struct_member_die) + (read_enumeration_type, read_array_type, read_set_type) + (read_tag_pointer_type, read_tag_reference_type) + (read_subroutine_type, read_base_type, read_subrange_type) + (read_full_die_1, partial_die_info::read) + (partial_die_info::read, by, new_symbol) + (dwarf2_const_value_data, dwarf2_const_value_attr) + (dump_die_shallow, dwarf2_fetch_constant_bytes) + (prepare_one_comp_unit): Update. + * dwarf2/attribute.h (DW_UNSND): Remove. + 2020-09-29 Tom Tromey * dwarf2/read.c (read_func_scope, prototyped_function_p) diff --git a/gdb/dwarf2/attribute.h b/gdb/dwarf2/attribute.h index f8969c90e41..aded129764a 100644 --- a/gdb/dwarf2/attribute.h +++ b/gdb/dwarf2/attribute.h @@ -305,8 +305,4 @@ private: void get_ref_die_offset_complaint () const; }; -/* Get at parts of an attribute structure. */ - -#define DW_UNSND(attr) ((attr)->u.unsnd) - #endif /* GDB_DWARF2_ATTRIBUTE_H */ diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c index d1c4cd8e400..bcac94ed36a 100644 --- a/gdb/dwarf2/read.c +++ b/gdb/dwarf2/read.c @@ -6985,9 +6985,9 @@ lookup_dwo_id (struct dwarf2_cu *cu, struct die_info* comp_unit_die) return cu->header.signature; struct attribute *attr; attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); - if (attr == nullptr) + if (attr == nullptr || !attr->form_is_unsigned ()) return gdb::optional (); - return DW_UNSND (attr); + return attr->as_unsigned (); } /* Subroutine of cutu_reader to simplify it. @@ -7471,9 +7471,9 @@ get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) /* Do we need to create a new group, or can we use an existing one? */ - if (stmt_list) + if (stmt_list != nullptr && stmt_list->form_is_unsigned ()) { - line_offset = DW_UNSND (stmt_list); + line_offset = stmt_list->as_unsigned (); ++tu_stats->nr_symtab_sharers; } else @@ -11147,19 +11147,19 @@ read_file_scope (struct die_info *die, struct dwarf2_cu *cu) attr = dwarf2_attr (die, DW_AT_macros, cu); if (attr == NULL) attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); - if (attr && cu->line_header) + if (attr != nullptr && attr->form_is_unsigned () && cu->line_header) { if (dwarf2_attr (die, DW_AT_macro_info, cu)) complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info")); - dwarf_decode_macros (cu, DW_UNSND (attr), 1); + dwarf_decode_macros (cu, attr->as_unsigned (), 1); } else { attr = dwarf2_attr (die, DW_AT_macro_info, cu); - if (attr && cu->line_header) + if (attr != nullptr && attr->form_is_unsigned () && cu->line_header) { - unsigned int macro_offset = DW_UNSND (attr); + unsigned int macro_offset = attr->as_unsigned (); dwarf_decode_macros (cu, macro_offset, 0); } @@ -14586,7 +14586,7 @@ dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, else { attr = dwarf2_attr (die, DW_AT_ranges, cu); - if (attr != NULL) + if (attr != nullptr && attr->form_is_unsigned ()) { /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton. We take advantage of the fact that DW_AT_ranges does not appear @@ -14598,7 +14598,7 @@ dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, either. */ int need_ranges_base = (die->tag != DW_TAG_compile_unit && attr->form != DW_FORM_rnglistx); - unsigned int ranges_offset = (DW_UNSND (attr) + unsigned int ranges_offset = (attr->as_unsigned () + (need_ranges_base ? cu->ranges_base : 0)); @@ -14764,7 +14764,7 @@ dwarf2_record_block_ranges (struct die_info *die, struct block *block, } attr = dwarf2_attr (die, DW_AT_ranges, cu); - if (attr != nullptr) + if (attr != nullptr && attr->form_is_unsigned ()) { /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton. We take advantage of the fact that DW_AT_ranges does not appear @@ -14779,7 +14779,7 @@ dwarf2_record_block_ranges (struct die_info *die, struct block *block, /* The value of the DW_AT_ranges attribute is the offset of the address range list in the .debug_ranges section. */ - unsigned long offset = (DW_UNSND (attr) + unsigned long offset = (attr->as_unsigned () + (need_ranges_base ? cu->ranges_base : 0)); std::vector blockvec; @@ -15040,7 +15040,7 @@ dwarf2_add_field (struct field_info *fip, struct die_info *die, attr = dwarf2_attr (die, DW_AT_bit_size, cu); if (attr != nullptr) { - FIELD_BITSIZE (*fp) = DW_UNSND (attr); + FIELD_BITSIZE (*fp) = attr->constant_value (0); } else { @@ -15050,7 +15050,7 @@ dwarf2_add_field (struct field_info *fip, struct die_info *die, /* Get bit offset of field. */ handle_data_member_location (die, cu, fp); attr = dwarf2_attr (die, DW_AT_bit_offset, cu); - if (attr != nullptr) + if (attr != nullptr && attr->form_is_unsigned ()) { if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) { @@ -15059,7 +15059,8 @@ dwarf2_add_field (struct field_info *fip, struct die_info *die, anonymous object to the MSB of the field. We don't have to do anything special since we don't need to know the size of the anonymous object. */ - SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); + SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) + + attr->as_unsigned ())); } else { @@ -15070,15 +15071,15 @@ dwarf2_add_field (struct field_info *fip, struct die_info *die, the field itself. The result is the bit offset of the LSB of the field. */ int anonymous_size; - int bit_offset = DW_UNSND (attr); + int bit_offset = attr->as_unsigned (); attr = dwarf2_attr (die, DW_AT_byte_size, cu); - if (attr != nullptr) + if (attr != nullptr && attr->form_is_unsigned ()) { /* The size of the anonymous object containing the bit field is explicit, so use the indicated size (in bytes). */ - anonymous_size = DW_UNSND (attr); + anonymous_size = attr->as_unsigned (); } else { @@ -15845,22 +15846,16 @@ get_alignment (struct dwarf2_cu *cu, struct die_info *die) return 0; } - ULONGEST align; - if (attr->form == DW_FORM_sdata) + LONGEST val = attr->constant_value (0); + if (val < 0) { - LONGEST val = attr->as_signed (); - if (val < 0) - { - complaint (_("DW_AT_alignment value must not be negative" - " - DIE at %s [in module %s]"), - sect_offset_str (die->sect_off), - objfile_name (cu->per_objfile->objfile)); - return 0; - } - align = val; + complaint (_("DW_AT_alignment value must not be negative" + " - DIE at %s [in module %s]"), + sect_offset_str (die->sect_off), + objfile_name (cu->per_objfile->objfile)); + return 0; } - else - align = DW_UNSND (attr); + ULONGEST align = val; if (align == 0) { @@ -16023,18 +16018,18 @@ read_structure_type (struct die_info *die, struct dwarf2_cu *cu) the default value DW_CC_normal. */ attr = dwarf2_attr (die, DW_AT_calling_convention, cu); if (attr != nullptr - && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr))) + && is_valid_DW_AT_calling_convention_for_type (attr->constant_value (0))) { ALLOCATE_CPLUS_STRUCT_TYPE (type); TYPE_CPLUS_CALLING_CONVENTION (type) - = (enum dwarf_calling_convention) (DW_UNSND (attr)); + = (enum dwarf_calling_convention) (attr->constant_value (0)); } attr = dwarf2_attr (die, DW_AT_byte_size, cu); if (attr != nullptr) { if (attr->form_is_constant ()) - TYPE_LENGTH (type) = DW_UNSND (attr); + TYPE_LENGTH (type) = attr->constant_value (0); else { struct dynamic_prop prop; @@ -16192,7 +16187,7 @@ handle_variant (struct die_info *die, struct type *type, variant.discr_list_data = discr->as_block (); } else - variant.discriminant_value = DW_UNSND (discr); + variant.discriminant_value = discr->as_unsigned (); for (die_info *variant_child = die->child; variant_child != NULL; @@ -16589,7 +16584,7 @@ read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) attr = dwarf2_attr (die, DW_AT_byte_size, cu); if (attr != nullptr) { - TYPE_LENGTH (type) = DW_UNSND (attr); + TYPE_LENGTH (type) = attr->constant_value (0); } else { @@ -16749,7 +16744,7 @@ read_array_type (struct die_info *die, struct dwarf2_cu *cu) attr = dwarf2_attr (die, DW_AT_bit_stride, cu); if (attr != NULL) - bit_stride = DW_UNSND (attr); + bit_stride = attr->constant_value (0); /* Irix 6.2 native cc creates array types without children for arrays with unspecified length. */ @@ -16815,10 +16810,10 @@ read_array_type (struct die_info *die, struct dwarf2_cu *cu) implementation may choose to implement triple vectors using this attribute. */ attr = dwarf2_attr (die, DW_AT_byte_size, cu); - if (attr != nullptr) + if (attr != nullptr && attr->form_is_unsigned ()) { - if (DW_UNSND (attr) >= TYPE_LENGTH (type)) - TYPE_LENGTH (type) = DW_UNSND (attr); + if (attr->as_unsigned () >= TYPE_LENGTH (type)) + TYPE_LENGTH (type) = attr->as_unsigned (); else complaint (_("DW_AT_byte_size for array type smaller " "than the total size of elements")); @@ -16895,8 +16890,8 @@ read_set_type (struct die_info *die, struct dwarf2_cu *cu) set_type = create_set_type (NULL, domain_type); attr = dwarf2_attr (die, DW_AT_byte_size, cu); - if (attr != nullptr) - TYPE_LENGTH (set_type) = DW_UNSND (attr); + if (attr != nullptr && attr->form_is_unsigned ()) + TYPE_LENGTH (set_type) = attr->as_unsigned (); maybe_set_alignment (cu, die, set_type); @@ -17252,13 +17247,13 @@ read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); if (attr_byte_size) - byte_size = DW_UNSND (attr_byte_size); + byte_size = attr_byte_size->constant_value (cu_header->addr_size); else byte_size = cu_header->addr_size; attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); if (attr_address_class) - addr_class = DW_UNSND (attr_address_class); + addr_class = attr_address_class->constant_value (DW_ADDR_none); else addr_class = DW_ADDR_none; @@ -17362,7 +17357,7 @@ read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, attr = dwarf2_attr (die, DW_AT_byte_size, cu); if (attr != nullptr) { - TYPE_LENGTH (type) = DW_UNSND (attr); + TYPE_LENGTH (type) = attr->constant_value (cu_header->addr_size); } else { @@ -17649,9 +17644,9 @@ read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) the default value DW_CC_normal. */ attr = dwarf2_attr (die, DW_AT_calling_convention, cu); if (attr != nullptr - && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr))) + && is_valid_DW_AT_calling_convention_for_subroutine (attr->constant_value (0))) TYPE_CALLING_CONVENTION (ftype) - = (enum dwarf_calling_convention) (DW_UNSND (attr)); + = (enum dwarf_calling_convention) attr->constant_value (0); else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; else @@ -17920,11 +17915,11 @@ read_base_type (struct die_info *die, struct dwarf2_cu *cu) gdbarch *arch; attr = dwarf2_attr (die, DW_AT_encoding, cu); - if (attr != nullptr) - encoding = DW_UNSND (attr); + if (attr != nullptr && attr->form_is_constant ()) + encoding = attr->constant_value (0); attr = dwarf2_attr (die, DW_AT_byte_size, cu); if (attr != nullptr) - bits = DW_UNSND (attr) * TARGET_CHAR_BIT; + bits = attr->constant_value (0) * TARGET_CHAR_BIT; name = dwarf2_name (die, cu); if (!name) complaint (_("DW_AT_name missing from DW_TAG_base_type")); @@ -17933,9 +17928,9 @@ read_base_type (struct die_info *die, struct dwarf2_cu *cu) enum bfd_endian byte_order = gdbarch_byte_order (arch); attr = dwarf2_attr (die, DW_AT_endianity, cu); - if (attr) + if (attr != nullptr && attr->form_is_constant ()) { - int endianity = DW_UNSND (attr); + int endianity = attr->constant_value (0); switch (endianity) { @@ -18045,19 +18040,20 @@ read_base_type (struct die_info *die, struct dwarf2_cu *cu) if (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_INT) { attr = dwarf2_attr (die, DW_AT_bit_size, cu); - if (attr != nullptr && DW_UNSND (attr) <= 8 * TYPE_LENGTH (type)) + if (attr != nullptr && attr->as_unsigned () <= 8 * TYPE_LENGTH (type)) { - unsigned real_bit_size = DW_UNSND (attr); + unsigned real_bit_size = attr->as_unsigned (); attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); /* Only use the attributes if they make sense together. */ if (attr == nullptr - || DW_UNSND (attr) + real_bit_size <= 8 * TYPE_LENGTH (type)) + || (attr->as_unsigned () + real_bit_size + <= 8 * TYPE_LENGTH (type))) { TYPE_MAIN_TYPE (type)->type_specific.int_stuff.bit_size = real_bit_size; if (attr != nullptr) TYPE_MAIN_TYPE (type)->type_specific.int_stuff.bit_offset - = DW_UNSND (attr); + = attr->as_unsigned (); } } } @@ -18420,7 +18416,7 @@ read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) attr = dwarf2_attr (die, DW_AT_byte_size, cu); if (attr != nullptr) - TYPE_LENGTH (range_type) = DW_UNSND (attr); + TYPE_LENGTH (range_type) = attr->constant_value (0); maybe_set_alignment (cu, die, range_type); @@ -18603,12 +18599,12 @@ read_full_die_1 (const struct die_reader_specs *reader, } struct attribute *attr = die->attr (DW_AT_str_offsets_base); - if (attr != nullptr) - cu->str_offsets_base = DW_UNSND (attr); + if (attr != nullptr && attr->form_is_unsigned ()) + cu->str_offsets_base = attr->as_unsigned (); attr = die->attr (DW_AT_loclists_base); if (attr != nullptr) - cu->loclist_base = DW_UNSND (attr); + cu->loclist_base = attr->as_unsigned (); auto maybe_addr_base = die->addr_base (); if (maybe_addr_base.has_value ()) @@ -18616,7 +18612,7 @@ read_full_die_1 (const struct die_reader_specs *reader, attr = die->attr (DW_AT_rnglists_base); if (attr != nullptr) - cu->ranges_base = DW_UNSND (attr); + cu->ranges_base = attr->as_unsigned (); if (any_need_reprocess) { @@ -19108,14 +19104,17 @@ partial_die_info::read (const struct die_reader_specs *reader, Although DWARF now specifies a way to provide this information, we support this practice for backward compatibility. */ - if (DW_UNSND (&attr) == DW_CC_program + if (attr.constant_value (0) == DW_CC_program && cu->language == language_fortran) main_subprogram = 1; break; case DW_AT_inline: - if (DW_UNSND (&attr) == DW_INL_inlined - || DW_UNSND (&attr) == DW_INL_declared_inlined) - may_be_inlined = 1; + { + LONGEST value = attr.constant_value (-1); + if (value == DW_INL_inlined + || value == DW_INL_declared_inlined) + may_be_inlined = 1; + } break; case DW_AT_import: @@ -19143,7 +19142,10 @@ partial_die_info::read (const struct die_reader_specs *reader, base, either. */ int need_ranges_base = (tag != DW_TAG_compile_unit && attr.form != DW_FORM_rnglistx); - unsigned int ranges_offset = (DW_UNSND (&attr) + /* It would be nice to reuse dwarf2_get_pc_bounds here, + but that requires a full DIE, so instead we just + reimplement it. */ + unsigned int ranges_offset = (attr.constant_value (0) + (need_ranges_base ? cu->ranges_base : 0)); @@ -19622,10 +19624,10 @@ read_attribute_reprocess (const struct die_reader_specs *reader, attr->as_unsigned_reprocess ())); break; case DW_FORM_loclistx: - DW_UNSND (attr) = read_loclist_index (cu, DW_UNSND (attr)); + attr->set_address (read_loclist_index (cu, attr->as_unsigned ())); break; case DW_FORM_rnglistx: - DW_UNSND (attr) = read_rnglist_index (cu, DW_UNSND (attr), tag); + attr->set_address (read_rnglist_index (cu, attr->as_unsigned (), tag)); break; case DW_FORM_strx: case DW_FORM_strx1: @@ -19918,11 +19920,11 @@ read_attribute_value (const struct die_reader_specs *reader, treat them as zero by default. */ if (attr->name == DW_AT_byte_size && form == DW_FORM_data4 - && DW_UNSND (attr) >= 0xffffffff) + && attr->as_unsigned () >= 0xffffffff) { complaint (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"), - hex_string (DW_UNSND (attr))); + hex_string (attr->as_unsigned ())); attr->set_unsigned (0); } @@ -21420,16 +21422,15 @@ new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu, inlined_func ? DW_AT_call_line : DW_AT_decl_line, cu); if (attr != nullptr) - { - SYMBOL_LINE (sym) = DW_UNSND (attr); - } + SYMBOL_LINE (sym) = attr->constant_value (0); attr = dwarf2_attr (die, inlined_func ? DW_AT_call_file : DW_AT_decl_file, cu); - if (attr != nullptr) + if (attr != nullptr && attr->form_is_unsigned ()) { - file_name_index file_index = (file_name_index) DW_UNSND (attr); + file_name_index file_index + = (file_name_index) attr->as_unsigned (); struct file_entry *fe; if (cu->line_header != NULL) @@ -21781,7 +21782,7 @@ dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, struct objfile *objfile = cu->per_objfile->objfile; enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; - LONGEST l = DW_UNSND (attr); + LONGEST l = attr->constant_value (0); if (bits < sizeof (*value) * 8) { @@ -21900,7 +21901,7 @@ dwarf2_const_value_attr (const struct attribute *attr, struct type *type, break; case DW_FORM_udata: - *value = DW_UNSND (attr); + *value = attr->as_unsigned (); break; default: @@ -22738,11 +22739,11 @@ dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) break; case DW_FORM_ref_addr: fprintf_unfiltered (f, "ref address: "); - fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); + fputs_filtered (hex_string (die->attrs[i].as_unsigned ()), f); break; case DW_FORM_GNU_ref_alt: fprintf_unfiltered (f, "alt ref address: "); - fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); + fputs_filtered (hex_string (die->attrs[i].as_unsigned ()), f); break; case DW_FORM_ref1: case DW_FORM_ref2: @@ -22750,7 +22751,7 @@ dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) case DW_FORM_ref8: case DW_FORM_ref_udata: fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", - (long) (DW_UNSND (&die->attrs[i]))); + (long) (die->attrs[i].as_unsigned ())); break; case DW_FORM_data1: case DW_FORM_data2: @@ -22758,11 +22759,11 @@ dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) case DW_FORM_data8: case DW_FORM_udata: fprintf_unfiltered (f, "constant: %s", - pulongest (DW_UNSND (&die->attrs[i]))); + pulongest (die->attrs[i].as_unsigned ())); break; case DW_FORM_sec_offset: fprintf_unfiltered (f, "section offset: %s", - pulongest (DW_UNSND (&die->attrs[i]))); + pulongest (die->attrs[i].as_unsigned ())); break; case DW_FORM_ref_sig8: fprintf_unfiltered (f, "signature: %s", @@ -23238,7 +23239,7 @@ dwarf2_fetch_constant_bytes (sect_offset sect_off, case DW_FORM_udata: type = die_type (die, cu); result = write_constant_as_bytes (obstack, byte_order, - type, DW_UNSND (attr), len); + type, attr->as_unsigned (), len); break; default: @@ -24248,7 +24249,7 @@ prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, /* Set the language we're debugging. */ attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); if (attr != nullptr) - set_cu_language (DW_UNSND (attr), cu); + set_cu_language (attr->constant_value (0), cu); else { cu->language = pretend_language; -- 2.30.2