c++/9143: 64BIT: Error in dump class hiearchy file generated for basic inheritance

[lei@ca.ibm.com]

>Number:         9143
>Category:       c++
>Synopsis:       64BIT: Error in dump class hiearchy file generated for basic inheritance
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Jan 02 11:46:00 PST 2003
>Closed-Date:
>Last-Modified:
>Originator:     Lei Huang
>Release:        3.2.0
>Organization:
>Environment:
Linux Version 2.4.19 SuSE SLES 8 (ppc) - Kernel 2.4.19-ul1-ppc64-SMP (36).
                  GNU assembler version 2.12.90.0.15 (powerpc-suse-linux) using BFD version 2.12.90.0.15 20020717 (SuSE)
>Description:
Error in dump class hiearchy file generated for basic inheritance in 64bit
compile.

Options given when GCC was configured/built:
Configured with: /usr/src/packages/BUILD/cross-ppc64-gcc-3.2/gcc-3.2/configure --enable-languages=c,c++,f77 --prefix=/opt/cross --host=powerpc-suse-linux --target=powerpc64-linux --enable-threads=posix --disable-nls --enable-shared --with-headers=/usr/src/packages/BUILD/cross-ppc64-gcc-3.2/include-ppc64-glibc-2.2.5
Thread model: posix
gcc version 3.2

Sourc code for a.cpp:
------------------------------------------------
struct A {
        int a;
        virtual void f(){};
} ;
struct B: virtual A {};

B d;
------------------------------------------------


Actual class hierarchy file (a.cpp.class):
------------------------------------------------
Vtable for A
A::_ZTV1A: 3 entries
0     0
8     &_ZTI1A
16    A::f()

Class A
   size=16 align=8
A (0x40066100) 0
    vptr=((&A::_ZTV1A) + 16)

Vtable for B
B::_ZTV1B: 7 entries
0     8
8     0
16    &_ZTI1B
24    0
32    000000000                 //ERR: expect this to be a none-zero offset
40    &_ZTI1B
48    A::f()

VTT for B
B::_ZTT1B: 2 entries
0     ((&B::_ZTV1B) + 24)
8     ((&B::_ZTV1B) + 48)

Class B
   size=24 align=8
B (0x40066680) 0 nearly-empty
    vptridx=0 vptr=((&B::_ZTV1B) + 24)
  A (0x400666c0) 8 virtual canonical
      vptridx=8 vbaseoffset=-24 vptr=((&B::_ZTV1B) + 48)
-----------------------------------------------------------


Expected Behaviour:
- see comment in dump file above


a.ii generated with -save-temps option
------------------------------------------------
# 1 "a.cpp"
# 1 "<built-in>"
# 1 "<command line>"
# 1 "a.cpp"
struct A {
        int a;
        virtual void f(){};
} ;
struct B: virtual A {};

B d;
------------------------------------------------
>How-To-Repeat:
1. g++ -fdump-class-hierarchy -c a.cpp
2. cat a.cpp.class
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: