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Subject: c++/10893: wrong class mapping for empty bases
Date: Wed, 21 May 2003 02:36:00 -0000	[thread overview]
Message-ID: <> (raw)

>Number:         10893
>Category:       c++
>Synopsis:       wrong class mapping for empty bases
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          wrong-code
>Submitter-Id:   net
>Arrival-Date:   Wed May 21 02:36:00 UTC 2003
>Originator:     Yan Liu
>Release:        unknown-1.0
linuxppc system, version 3.2 32bit mode.

using -fdump-class-hierarchy option to get the class layout of the above testcase. You will find the empty base class  E1 and E are at offset 4 in struct D1 class layout. There is  a another data member also be mapped at the same address, which is wrong according to C++ ABI. 

Content-Type: text/plain; name="kaka.C"
Content-Disposition: inline; filename="kaka.C"

struct E {};
struct E1: public E {};
struct E2: public E {};
struct D: public virtual E1, public E2 {
struct D1: public D {
	int d1;
D1 objd1;

             reply	other threads:[~2003-05-21  2:36 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-05-21  2:36 yanliu [this message]
2003-05-21  3:06 Andrew Pinski
2003-05-21 13:57 bangerth

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