/* Peel type aliases and qualifier tags from a type DIE.
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Copyright (C) 2014, 2015, 2016 Red Hat, Inc.
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This file is part of elfutils.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "libdwP.h"
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#include <dwarf.h>
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#include <string.h>
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int
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dwarf_peel_type (Dwarf_Die *die, Dwarf_Die *result)
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{
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int tag;
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/* Ignore previous errors. */
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if (die == NULL)
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return -1;
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*result = *die;
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tag = INTUSE (dwarf_tag) (result);
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/* Stack 8 of all these modifiers, after that it gets silly. */
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#define MAX_DEPTH (8 * 8)
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int max_depth = MAX_DEPTH;
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while ((tag == DW_TAG_typedef
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|| tag == DW_TAG_const_type
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|| tag == DW_TAG_volatile_type
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|| tag == DW_TAG_restrict_type
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|| tag == DW_TAG_atomic_type
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|| tag == DW_TAG_immutable_type
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|| tag == DW_TAG_packed_type
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|| tag == DW_TAG_shared_type)
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&& max_depth-- > 0)
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{
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Dwarf_Attribute attr_mem;
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Dwarf_Attribute *attr = INTUSE (dwarf_attr_integrate) (result, DW_AT_type,
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&attr_mem);
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if (attr == NULL)
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return 1;
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if (INTUSE (dwarf_formref_die) (attr, result) == NULL)
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return -1;
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tag = INTUSE (dwarf_tag) (result);
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}
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if (tag == DW_TAG_invalid || max_depth <= 0)
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return -1;
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return 0;
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}
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INTDEF(dwarf_peel_type)
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