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* Re: c++/3006: bad code for complicated virtual inheritance (regression from 2.95)
@ 2001-06-08 7:32 nathan
0 siblings, 0 replies; 3+ messages in thread
From: nathan @ 2001-06-08 7:32 UTC (permalink / raw)
To: gcc-bugs, gcc-prs, jason, snyder
Synopsis: bad code for complicated virtual inheritance (regression from 2.95)
State-Changed-From-To: analyzed->closed
State-Changed-By: nathan
State-Changed-When: Fri Jun 8 07:32:41 2001
State-Changed-Why:
my mistake. I'd updated the ChangeLog, but not class.c. doh!
2001-06-08 Nathan Sidwell <nathan@codesourcery.com>
* g++.old-deja/g++.abi/vbase2.C: New test.
* g++.old-deja/g++.abi/vbase3.C: New test.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=3006&database=gcc
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: c++/3006: bad code for complicated virtual inheritance (regression from 2.95)
@ 2001-06-08 6:57 nathan
0 siblings, 0 replies; 3+ messages in thread
From: nathan @ 2001-06-08 6:57 UTC (permalink / raw)
To: gcc-bugs, gcc-prs, jason, snyder
Synopsis: bad code for complicated virtual inheritance (regression from 2.95)
State-Changed-From-To: feedback->analyzed
State-Changed-By: nathan
State-Changed-When: Fri Jun 8 06:57:19 2001
State-Changed-Why:
this is still failing. I attach the testcase I'm using (and
was about to commit!)do you still want to work on it, or shall
I?
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=3006&database=gcc
^ permalink raw reply [flat|nested] 3+ messages in thread
* c++/3006: bad code for complicated virtual inheritance (regression from 2.95)
@ 2001-05-30 13:36 snyder
0 siblings, 0 replies; 3+ messages in thread
From: snyder @ 2001-05-30 13:36 UTC (permalink / raw)
To: gcc-gnats
>Number: 3006
>Category: c++
>Synopsis: bad code for complicated virtual inheritance (regression from 2.95)
>Confidential: no
>Severity: critical
>Priority: medium
>Responsible: unassigned
>State: open
>Class: wrong-code
>Submitter-Id: net
>Arrival-Date: Wed May 30 13:36:02 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator: scott snyder
>Release: 3.0 20010529 (prerelease)
>Organization:
>Environment:
System: Linux karma 2.2.16-22 #1 Tue Aug 22 16:49:06 EDT 2000 i686 unknown
Architecture: i686
host: i686-pc-linux-gnu
build: i686-pc-linux-gnu
target: i686-pc-linux-gnu
configured with: ../egcs/configure --prefix=/usr/local/egcs --enable-threads=posix --enable-long-long
>Description:
When the program below is compiled with gcc 3, it crashes with a SEGV
when run. When compiled with gcc 2.95, it executes normally.
>How-To-Repeat:
-----------------------------------------------------
struct CORBA_Object
{
virtual ~CORBA_Object() {}
};
class CORBA_Object_skel : public virtual CORBA_Object {};
class CORBA_IRObject_skel : virtual public CORBA_Object_skel {};
class CORBA_Container_skel : virtual public CORBA_IRObject_skel {};
class CORBA_IRObject_impl : public virtual CORBA_IRObject_skel {};
class CORBA_Repository_impl
: public virtual CORBA_Container_skel,
public virtual CORBA_IRObject_impl
{
};
int
main(int argc, char* argv[])
{
new CORBA_Repository_impl;
return 0;
}
-----------------------------------------------------
[sss@karma translator]$ g++ -g -o xidl xidl.cpp
[sss@karma translator]$ ./xidl
Segmentation fault (core dumped)
Here's the stack trace where it crashed:
#0 0x804990d in _ZN19CORBA_IRObject_implC2Ev (this=0x804b62c,
__vtt_parm=0x804ae3c) at xidl.cpp:21
#1 0x80488c8 in _ZN21CORBA_Repository_implC1Ev (__vtt_parm=0x804b628)
at xidl.cpp:21
#2 0x80487c1 in main (argc=1, argv=0xbfffd3b4) at xidl.cpp:21
(gdb) x/i $pc
0x804990d <_ZN19CORBA_IRObject_implC2Ev+109>: mov (%edx),%edx
(gdb) p/x $edx
$1 = 0x10094048
(gdb) x/x 0x10094048
0x10094048: Cannot access memory at address 0x10094048
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
^ permalink raw reply [flat|nested] 3+ messages in thread
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2001-06-08 7:32 c++/3006: bad code for complicated virtual inheritance (regression from 2.95) nathan
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2001-06-08 6:57 nathan
2001-05-30 13:36 snyder
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