Bug#212048: marked as done (g++-3.3: a statically compiled c++ binary which references syslog(3) SEGFAULTs on an exception)
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From: bert hubert <ahu@ds9a.nl>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: g++-3.3: a statically compiled c++ binary which references syslog(3)
SEGFAULTs on an exception
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Date: Sun, 21 Sep 2003 23:57:35 +0200
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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
---------------------------------------
Received: (at 212048-done) by bugs.debian.org; 12 Oct 2003 15:09:18 +0000
>From james@ruari-quinn.demon.co.uk Sun Oct 12 10:09:16 2003
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To: 212048-done@bugs.debian.org
Subject: Re: g++-3.3: a statically compiled c++ binary which references
syslog(3) SEGFAULTs on an exception
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From: James Troup <james@nocrew.org>
Date: Sun, 12 Oct 2003 16:09:15 +0100
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Hi,
This has been fixed by binutils 2.14.90.0.6-4 which has just been
uploaded to the archive.
The .changes file is below for reference.
--
James
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Format: 1.7
Date: Sun, 12 Oct 2003 14:26:26 +0100
Source: binutils
Binary: binutils-dev binutils-multiarch binutils binutils-doc
Architecture: source all i386
Version: 2.14.90.0.6-4
Distribution: unstable
Urgency: low
Maintainer: James Troup <james@nocrew.org>
Changed-By: James Troup <james@nocrew.org>
Description:
binutils - The GNU assembler, linker and binary utilities
binutils-dev - The GNU binary utilities (BFD development files)
binutils-doc - Documentation for the GNU assembler, linker and binary utilities
binutils-multiarch - Binary utilities that support multi-arch targets
Closes: 213448
Changes:
binutils (2.14.90.0.6-4) unstable; urgency=low
.
* 103_static_linking_elf_eh_frame.dpatch: new patch from H.J. Lu
<hongjiu.lu@intel.com> to fix static linking of C++ binaries.
.
* 200_alpha_null_got_ld_fix.dpatch: renamed...
* 102_alpha_null_got_ld_fix.dpatch: to this.
.
* debian/rules: patch from Guido Guenther <agx@debian.org> to enable
mips64 support. Closes: #213448
Files:
aeb2e36623db380479b7ae967a1e4258 826 devel standard binutils_2.14.90.0.6-4.dsc
877332975ed2b6ed5c0679cb696fa164 35954 devel standard binutils_2.14.90.0.6-4.diff.gz
57c1c2b67f418601fc7d0a8a3de71792 418330 doc optional binutils-doc_2.14.90.0.6-4_all.deb
509f48745ace50e2b911823f50ae6dc2 2429690 devel standard binutils_2.14.90.0.6-4_i386.deb
b0114dbdffa77443d933c844e7a4e140 2816932 devel extra binutils-dev_2.14.90.0.6-4_i386.deb
8b463c8cb9b7c584e9be94d75cb32d9f 7961190 devel extra binutils-multiarch_2.14.90.0.6-4_i386.deb
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