Re: c++/5453: Compiled program crash - inheritance/template/friend class problem

Re: c++/5453: Compiled program crash - inheritance/template/friend class problem

[Karel Gardas]

The following reply was made to PR c++/5453; it has been noted by GNATS.

From: Karel Gardas <kgardas@iol.cz>
To: jason@gcc.gnu.org,  <gcc-bugs@gcc.gnu.org>,  <gcc-prs@gcc.gnu.org>, 
     <jason@gcc.gnu.org>,  <nobody@gcc.gnu.org>,  <gcc-gnats@gcc.gnu.org>
Cc:  
Subject: Re: c++/5453: Compiled program crash - inheritance/template/friend
 class problem
Date: Wed, 23 Jan 2002 07:41:50 +0100 (CET)

 On 22 Jan 2002 jason@gcc.gnu.org wrote:
 
 > Synopsis: Compiled program crash - inheritance/template/friend class problem
 >
 > Responsible-Changed-From-To: unassigned->jason
 > Responsible-Changed-By: jason
 > Responsible-Changed-When: Tue Jan 22 09:28:08 2002
 > Responsible-Changed-Why:
 >     mine
 >
 > http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5453
 >
 
 I would like to update this bug report.
 
 I heard that some gcc3.1 in the past doesn't have this bug and so I've
 tried to find the first version in which it appeared.
 
 The result is that version gcc version 3.1 20011212 (experimental) is
 correct ie without this bug and next version gcc version 3.1 20011213
 (experimental) has this bug.
 
 Diff between changelogs in gcc/cp/ looks:
 
 thinkpad:~/cvs/gcc$ diff -c gcc3.1-2001-12-12/gcc/cp/ChangeLog gcc3.1-2001-12-13/gcc/cp/ChangeLog
 *** gcc3.1-2001-12-12/gcc/cp/ChangeLog  Tue Jan 22 23:20:55 2002
 --- gcc3.1-2001-12-13/gcc/cp/ChangeLog  Tue Jan 22 21:39:33 2002
 ***************
 *** 1,3 ****
 --- 1,33 ----
 + 2001-12-13  Jason Merrill  <jason@redhat.com>
 +
 +       * optimize.c (maybe_clone_body): Fix parameter updating.
 +
 + 2001-12-12  Jason Merrill  <jason@redhat.com>
 +
 +       * decl.c (store_parm_decls): Remove parms_have_cleanups cruft.
 +       * semantics.c (genrtl_start_function): Don't pass
 +       parms_have_cleanups or push an extra binding level.
 +       (genrtl_finish_function): Lose cleanup_label cruft.
 +
 +       * cp-tree.h (struct cp_language_function): Remove x_ctor_label.
 +       (ctor_label): Remove.
 +       * semantics.c (finish_return_stmt): Lose ctor_label support.
 +       * decl.c (finish_constructor_body, mark_lang_function): Likewise.
 +       * typeck.c (check_return_expr): Check DECL_DESTRUCTOR_P, not
 +       dtor_label.
 +
 +       * call.c (build_new_method_call): Let resolves_to_fixed_type_p
 +       check for [cd]tors.
 +       * class.c (fixed_type_or_null, case INDIRECT_REF): Fix.
 +
 +       * decl.c (finish_function): Check VMS_TARGET, not VMS.
 +
 +       * decl.c (start_cleanup_fn): Remove redundant pushlevel.
 +       (end_cleanup_fn): And poplevel.
 +
 +       * semantics.c (setup_vtbl_ptr): Always build a CTOR_INITIALIZER
 +       if we're in a template.
 +
   2001-12-12  Jakub Jelinek  <jakub@redhat.com>
 
         * cp-tree.h (DESTRUCTOR_DECL_PREFIX, DESTRUCTOR_NAME_P,
 thinkpad:~/cvs/gcc$
 
 
 
 
 Cheers,
 
 Karel
 --
  Karel Gardas                           e-mail: kgardas@iol.cz
 
 

Re: c++/5453: Compiled program crash - inheritance/template/friend class problem

[jason]

Synopsis: Compiled program crash - inheritance/template/friend class problem

State-Changed-From-To: open->closed
State-Changed-By: jason
State-Changed-When: Wed Jan 23 04:51:50 2002
State-Changed-Why:
    fixed by
    
            PR c++/5453
            * class.c (fixed_type_or_null): Fix thinko.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5453

Re: c++/5453: Compiled program crash - inheritance/template/friend class problem

[jason]

Synopsis: Compiled program crash - inheritance/template/friend class problem

Responsible-Changed-From-To: unassigned->jason
Responsible-Changed-By: jason
Responsible-Changed-When: Tue Jan 22 09:28:08 2002
Responsible-Changed-Why:
    mine

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5453

c++/5453: Compiled program crash - inheritance/template/friend class problem

[kgardas]

>Number:         5453
>Category:       c++
>Synopsis:       Compiled program crash - inheritance/template/friend class problem
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jan 22 06:46:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     kgardas@iol.cz
>Release:        gcc version 3.1 20020121 (experimental)
>Organization:
>Environment:
Debian GNU/Linux 3.0 on x86 machine
>Description:

 I've compiled attached program with:

thinkpad:~/mujprog/c-cc/tests/gcc31/crash-out-types$ c++ -v -o crash2 crash2.cc 
Reading specs from /home/karel/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/specs
Configured with: ./../gcc3.1/configure --prefix=/home/karel/usr/local --enable-shared --enable-threads --enable-languages=c++
Thread model: posix
gcc version 3.1 20020121 (experimental)
 /home/karel/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/cc1plus -v -D__GNUC__=3 -D__GNUC_MINOR__=1 -D__GNUC_PATCHLEVEL__=0 -D__ELF__ -Dunix -Dlinux -D__ELF__ -D__unix__ -D__linux__ -D__unix -D__linux -Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -D_GNU_SOURCE -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i686__ -D__tune_pentiumpro__ crash2.cc -D__GNUG__=3 -D__DEPRECATED -D__EXCEPTIONS -D__GXX_ABI_VERSION=100 -quiet -dumpbase crash2.cc -version -o /tmp/ccddBPcT.s
GNU CPP version 3.1 20020121 (experimental) (cpplib) (i386 Linux/ELF)
GNU C++ version 3.1 20020121 (experimental) (i686-pc-linux-gnu)
        compiled by GNU C version 3.1 20020121 (experimental).
ignoring nonexistent directory "/home/karel/usr/local/i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /home/karel/usr/local/include/g++-v3
 /home/karel/usr/local/include/g++-v3/i686-pc-linux-gnu
 /home/karel/usr/local/include/g++-v3/backward
 /usr/local/include
 /home/karel/usr/local/include
 /home/karel/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/include
 /usr/include
End of search list.
 as -V -Qy -o /tmp/ccozjyyR.o /tmp/ccddBPcT.s
GNU assembler version 2.11.92.0.12.3 (i386-linux) using BFD version 2.11.92.0.12.3 20011121 Debian/GNU Linux
 /home/karel/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/collect2 -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 -o crash2 /usr/lib/crt1.o /usr/lib/crti.o /home/karel/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/crtbegin.o -L/home/karel/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1 -L/home/karel/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/../../.. /tmp/ccozjyyR.o -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /home/karel/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/crtend.o /usr/lib/crtn.o


Then I started it and it crashed!


thinkpad:~/mujprog/c-cc/tests/gcc31/crash-out-types$ ./crash2 
RefCntObject::RefCntObject()
CORBA::Object::Object()
B::B()
B_impl::B_impl()
Segmentation fault
thinkpad:~/mujprog/c-cc/tests/gcc31/crash-out-types$ 


This code works well with my standard gcc 2.95.4 (Debian prerelease) - the output is below:


ReaRefCntObject::RefCntObject()
CORBA::Object::Object()
B::B()
B_impl::B_impl()
RefCntObject::RefCntObject()
CORBA::Object::Object()
A::A()
A_impl::A_impl()
RefCntObject::_deref() <- 1
RefCntObject::_deref() -> 0
A_impl::~A_impl()
A::~A()
CORBA::Object::~Object()
RefCntObject::~RefCntObject()
_refcnt(): 0
RefCntObject::_deref() <- 1
RefCntObject::_deref() -> 0
B_impl::~B_impl()
B::~B()
CORBA::Object::~Object()
RefCntObject::~RefCntObject()
_refcnt(): 0
thinkpad:~/mujprog/c-cc/tests/gcc31/crash-out-types$ 


Cheers,

Karel
>How-To-Repeat:

>Fix:

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