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eeb647814f
This rewrites the two new die_info methods to iterate over attributes rather than to do two separate searches. gdb/ChangeLog 2020-03-26 Tom Tromey <tom@tromey.com> * dwarf2/die.h (struct die_info) <addr_base, ranges_base>: Rewrite.
104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
/* DWARF DIEs
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Copyright (C) 2003-2020 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef GDB_DWARF2_DIE_H
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#define GDB_DWARF2_DIE_H
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/* This data structure holds a complete die structure. */
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struct die_info
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{
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/* Return the named attribute or NULL if not there, but do not
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follow DW_AT_specification, etc. */
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struct attribute *attr (dwarf_attribute name)
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{
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for (unsigned i = 0; i < num_attrs; ++i)
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if (attrs[i].name == name)
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return &attrs[i];
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return NULL;
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}
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/* Return the address base of the compile unit, which, if exists, is
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stored either at the attribute DW_AT_GNU_addr_base, or
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DW_AT_addr_base. */
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gdb::optional<ULONGEST> addr_base ()
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{
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for (unsigned i = 0; i < num_attrs; ++i)
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if (attrs[i].name == DW_AT_addr_base
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|| attrs[i].name == DW_AT_GNU_addr_base)
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{
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/* If both exist, just use the first one. */
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return DW_UNSND (&attrs[i]);
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}
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return gdb::optional<ULONGEST> ();
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}
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/* Return range lists base of the compile unit, which, if exists, is
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stored either at the attribute DW_AT_rnglists_base or
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DW_AT_GNU_ranges_base. */
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ULONGEST ranges_base ()
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{
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for (unsigned i = 0; i < num_attrs; ++i)
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if (attrs[i].name == DW_AT_rnglists_base
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|| attrs[i].name == DW_AT_GNU_ranges_base)
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{
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/* If both exist, just use the first one. */
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return DW_UNSND (&attrs[i]);
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}
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return 0;
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}
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/* DWARF-2 tag for this DIE. */
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ENUM_BITFIELD(dwarf_tag) tag : 16;
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/* Number of attributes */
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unsigned char num_attrs;
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/* True if we're presently building the full type name for the
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type derived from this DIE. */
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unsigned char building_fullname : 1;
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/* True if this die is in process. PR 16581. */
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unsigned char in_process : 1;
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/* True if this DIE has children. */
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unsigned char has_children : 1;
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/* Abbrev number */
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unsigned int abbrev;
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/* Offset in .debug_info or .debug_types section. */
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sect_offset sect_off;
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/* The dies in a compilation unit form an n-ary tree. PARENT
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points to this die's parent; CHILD points to the first child of
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this node; and all the children of a given node are chained
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together via their SIBLING fields. */
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struct die_info *child; /* Its first child, if any. */
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struct die_info *sibling; /* Its next sibling, if any. */
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struct die_info *parent; /* Its parent, if any. */
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/* An array of attributes, with NUM_ATTRS elements. There may be
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zero, but it's not common and zero-sized arrays are not
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sufficiently portable C. */
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struct attribute attrs[1];
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};
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#endif /* GDB_DWARF2_DIE_H */
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