https://sourceware.org/bugzilla/show_bug.cgi?id=30264
Bug ID: 30264
Summary: offsets of fields in unnamed structures/unions are
wrong
Product: binutils
Version: 2.36
Status: NEW
Severity: normal
Priority: P2
Component: libctf
Assignee: unassigned at sourceware dot org
Reporter: nick.alcock at oracle dot com
Target Milestone: ---
In e.g.
struct A
{
int a;
char *b;
struct
{
struct
{
char *one;
int two;
};
};
};
offsetof (struct A, one) is most unlikely to be zero; but
ctf_member_info (CTF_type_corresponding_to_A, "one") returns zero every time.
This is obviously wrong: ctf_member_info() recurses to anonymous struct
children but does not add the offset of the anonymous struct to the offset it
returns.
(A secondary but much less significant problem is that ctf_add_member() of
fields to such structures should return ECTF_DUPLICATE if the name exists in
any of the containing structures or in any underlying anonymous ones. Of course
this is only likely to happen if the compiler is buggy or something very
strange is being hand-built using the ctf_add*() functions.)
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