Package: binutils
Version: 2.20.1-16
Severity: important
The following small example fails
---
$ cat test.c
static __thread int x, a[8];
int main() { return a[x++]++; }
$ gcc -m32 -O1 -fPIC -pie test.c -o local
$ ./local
Segmentation fault
---
I see the problem has been addressed via [1] (higher optimisation
levels make these tls variables local-dynamic and indroduce the
problem). I have confirmed the fix provided in [2/3] fixes this issue
when applied against 2.20.1. I can make a dpatch from that if you
would like.
It would be really nice if this could make it into a stable update;
unlike a BFD assert or something obvious like that, this is a real
PITA to track down when it subtly corrupts your code :)
Thanks,
-i
[1] https://bugs.launchpad.net/ubuntu/+source/binutils/+bug/663294
[2] http://sourceware.org/bugzilla/show_bug.cgi?id=12654
[3]
http://sourceware.org/git/?p=binutils.git;a=commitdiff;h=394c20f3cb2295d278f2b25a59bd123bc310dfa1
-- System Information:
Debian Release: 6.0.2
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.32-5-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages binutils depends on:
ii libc6 2.11.2-10 Embedded GNU C Library: Shared lib
ii libgcc1 1:4.4.5-8 GCC support library
ii libstdc++6 4.4.5-8 The GNU Standard C++ Library v3
ii zlib1g 1:1.2.3.4.dfsg-3 compression library - runtime
binutils recommends no packages.
Versions of packages binutils suggests:
pn binutils-doc <none> (no description available)
-- no debconf information
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