Bug#212048: g++-3.3: a statically compiled c++ binary which references syslog(3) SEGFAULTs on an exception

[bert hubert <ahu@ds9a.nl>]

Package: g++-3.3
Version: 1:3.3.2-0pre4
Severity: important
Tags: sid

When compiled with "g++ static.cc -o static -static", this program segfaults
on execution. I spent 6 hours narrowing this down as it is a very unlikely
bug. Some speculation below.

#include <syslog.h>
#include <iostream>

using namespace std;

int func()
{
  syslog(LOG_INFO,"","");
}

int main(int argc, char **argv)
{
  try {
    throw(10);
  }
  catch(...) {
    cout<<"Smells like a 10"<<endl;
  }
}

Commenting out syslog solves the problem. The backtrace:

#0  0x0808c7e0 in get_cie_encoding ()
#1  0x0808cc3a in classify_object_over_fdes ()
#2  0x0808daa9 in init_object ()
#3  0x0808d1e8 in search_object ()
#4  0x0808d298 in _Unwind_Find_registered_FDE ()
#5  0x0808d79c in _Unwind_Find_FDE ()
#6  0x0808b314 in uw_frame_state_for ()
#7  0x0808b84f in uw_init_context_1 ()
#8  0x0808bad8 in _Unwind_RaiseException ()
#9  0x0807d999 in __cxa_throw ()
#10 0x08048253 in main ()

The following may be interesting:
$ nm -C static.o
00000110 t global constructors keyed to func()

The problem exists even when syslog is, in fact, never called. So I suspect
the problem must lie in these 'global constructors keyed to func()'. In the
glibc-2.3.2 sources we find:

/* Define the lock.  */
__libc_lock_define_initialized (static, syslog_lock)

Which may well lead to a global initializer.

-- System Information:
Debian Release: testing/unstable
Architecture: i386
Kernel: Linux d800.ds9a.nl 2.6.0-test4 #2 Sat Aug 23 15:40:41 CEST 2003 i686
Locale: LANG=C, LC_CTYPE=

Versions of packages g++-3.3 depends on:
ii  gcc-3.3                    1:3.3.2-0pre4 The GNU C compiler
ii  gcc-3.3-base               1:3.3.2-0pre4 The GNU Compiler Collection (base 
ii  libc6                      2.3.2-7       GNU C Library: Shared libraries an
ii  libstdc++5-3.3-dev         1:3.3.2-0pre4 The GNU Standard C++ Library v3 (d

-- no debconf information