From: "Andreas.Kromke at dreamchip dot de" <sourceware-bugzilla@sourceware.org>
To: elfutils-devel@sourceware.org
Subject: [Bug libdw/23981] New: dwarf_siblingof() fails with attribute form DW_FORM_ref_addr
Date: Thu, 13 Dec 2018 17:06:00 -0000 [thread overview]
Message-ID: <bug-23981-10460@http.sourceware.org/bugzilla/> (raw)
https://sourceware.org/bugzilla/show_bug.cgi?id=23981
Bug ID: 23981
Summary: dwarf_siblingof() fails with attribute form
DW_FORM_ref_addr
Product: elfutils
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: libdw
Assignee: unassigned at sourceware dot org
Reporter: Andreas.Kromke at dreamchip dot de
CC: elfutils-devel at sourceware dot org
Target Milestone: ---
The API function dwarf_siblingof() internally calls __libdw_formref() which is
deprecated and especially does not support DW_FORM_ref_addr, resulting in a
return code of -1 (format error).
Instead dwarf_siblingof() should call dwarf_formref_die() or an internal
variant of that.
A temporary workaround might be:
int my_dwarf_siblingof(Dwarf_Die *die, Dwarf_Die *result) {
int ret = dwarf_siblingof(die, result);
if (ret >= 0) return ret;
Dwarf_Attribute attr_result;
Dwarf_Attribute *attr = dwarf_attr(die, DW_AT_sibling, &attr_result);
if (attr == NULL) return -1;
Dwarf_Die *formref_die = dwarf_formref_die(attr, result);
if (formref_die == NULL) return -1;
return 0;
}
--
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next reply other threads:[~2018-12-13 17:06 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-13 17:06 Andreas.Kromke at dreamchip dot de [this message]
2018-12-25 14:10 ` [Bug libdw/23981] " mark at klomp dot org
2019-01-02 17:06 ` Andreas.Kromke at dreamchip dot de
2019-01-03 17:25 ` Andreas.Kromke at dreamchip dot de
2019-01-13 16:37 ` mark at klomp dot org
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