https://sourceware.org/bugzilla/show_bug.cgi?id=21330
Bug ID: 21330
Summary: dwarf_peel_type() loops infinitely for typedef const
struct ...
Product: elfutils
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: libdw
Assignee: unassigned at sourceware dot org
Reporter: kubo at jiubao dot org
CC: elfutils-devel at sourceware dot org
Target Milestone: ---
When a type is defined as "typedef const struct foo foo_t", dwarf_peel_type()
for foo_t loops infinitely.
38 int
39 dwarf_peel_type (Dwarf_Die *die, Dwarf_Die *result)
40 {
41 int tag;
42
43 /* Ignore previous errors. */
44 if (die == NULL)
45 return -1;
46
47 *result = *die;
48 tag = INTUSE (dwarf_tag) (result);
49 while (tag == DW_TAG_typedef
50 || tag == DW_TAG_const_type
51 || tag == DW_TAG_volatile_type
52 || tag == DW_TAG_restrict_type
53 || tag == DW_TAG_atomic_type)
54 {
55 Dwarf_Attribute attr_mem;
56 Dwarf_Attribute *attr = INTUSE (dwarf_attr_integrate) (die,
DW_AT_type,
57 &attr_mem);
58 if (attr == NULL)
59 return 1;
60
61 if (INTUSE (dwarf_formref_die) (attr, result) == NULL)
62 return -1;
63
64 tag = INTUSE (dwarf_tag) (result);
65 }
...
dwarf_tag() at line 48 returns DW_TAG_typedef.
dwarf_attr_integrate() and dwarf_formref_die() sets DW_AT_type of die to
result.
dwarf_tag() at line 64 returns DW_TAG_const.
dwarf_attr_integrate() and dwarf_formref_die() sets same value to result
because the first argument of dwarf_attr_integrate() is unchanged.
dwarf_tag() at line 64 returns same value forever.
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