Bug#325739: gcc-4.0: Segfault with gcc4 (and above) when using LD_PRELOAD
Package: gcc-4.0
Version: 4.0.1-2
Severity: important
Hi,
Description:
I am running a program that is outputing a file. The very same program
when run with LD_PRELOAD set to libGL.so, is segfaulting. The segfault
does not occur when using gcc2.95, gcc3.2, gcc3.3 and gcc3.4 (debian
package). The segfault also does not occur when 'unset'ing the env var
LD_PRELOAD.
The backtrace can be found here:
http://www.creatis.insa-lyon.fr/~malaterre/gcc/gdb.log
And I ran also strace with/ and without LD_PRELOAD set:
$ export LD_PRELOAD=/usr/X11R6/lib/libGL.so
$ strace /home/mathieu/Dashboards/MyTests/VTK-gcc4/bin/vtkParseOGLExt
/home/mathieu/Dashboards/MyTests/VTK-gcc4/Rendering
/home/mathieu/Dashboards/MyTests/ParaView/VTK/Utilities/ParseOGLExt/headers/glext.h /home/mathieu/Dashboards/MyTests/ParaView/VTK/Utilities/ParseOGLExt/headers/glxext.h /home/mathieu/Dashboards/MyTests/ParaView/VTK/Utilities/ParseOGLExt/headers/wglext.h >& /tmp/log1
$ unset LD_PRELOAD
$ strace /home/mathieu/Dashboards/MyTests/VTK-gcc4/bin/vtkParseOGLExt
/home/mathieu/Dashboards/MyTests/VTK-gcc4/Rendering
/home/mathieu/Dashboards/MyTests/ParaView/VTK/Utilities/ParseOGLExt/headers/glext.h /home/mathieu/Dashboards/MyTests/ParaView/VTK/Utilities/ParseOGLExt/headers/glxext.h /home/mathieu/Dashboards/MyTests/ParaView/VTK/Utilities/ParseOGLExt/headers/wglext.h >& /tmp/log2
Those logs files can be found here:
http://www.creatis.insa-lyon.fr/~malaterre/gcc/log1
and
http://www.creatis.insa-lyon.fr/~malaterre/gcc/log2
-----------------------------------------------------------------------------------
Anyone interested in reproducing the bug need a debian testing with
gcc4:
(assuming gcc points to gcc 4.0.1)
$ sudo apt-get install cmake
$ cvs -d:pserver:anoncvs@vtk.org:2401/cvsroot/VTK login
$ cvs -d:pserver:anoncvs@vtk.org:2401/cvsroot/VTK co VTK
$ mkdir VTK-gcc
$ cd VTK-gcc
$ cmake ../VTK
$ make
...
It should take a while to compile, but when entering in
VTK-gcc/Rendering the segfault should occur.
Mathieu
Ps: Previous post can also be found on gcc mailing list:
http://gcc.gnu.org/ml/gcc/2005-08/msg00883.html
and
http://gcc.gnu.org/ml/gcc/2005-08/msg00836.html
-- System Information:
Debian Release: testing/unstable
APT prefers testing
APT policy: (989, 'testing')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.8-2-386
Locale: LANG=en_US, LC_CTYPE=en_US (charmap=ISO-8859-1)
Versions of packages gcc-4.0 depends on:
ii binutils 2.16.1-2 The GNU assembler, linker and bina
ii cpp-4.0 4.0.1-2 The GNU C preprocessor
ii gcc-4.0-base 4.0.1-2 The GNU Compiler Collection (base
ii libc6 2.3.2.ds1-22 GNU C Library: Shared libraries an
ii libgcc1 1:4.0.1-2 GCC support library
Versions of packages gcc-4.0 recommends:
ii libc6-dev 2.3.2.ds1-22 GNU C Library: Development Librari
pn libmudflap0-dev <none> (no description available)
-- no debconf information
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