Bug#219949: gcc: linux-2.6/sound/core/oss/rate.c miscompiled

2003-11-10 Thread herbert 
Package: gcc
Version: 4:3.3.1-2
Severity: normal

gcc -march=i386 -fomit-frame-pointer -O2

miscompiles sound/core/oss/rate.c in Linux 2.6.0-test9.

I've attached the preprocessed source that demonstrates the
problem.

In the assembly output with -S, look for the 5th label in
get_s16_labels.0.  That label should do a word load, but
instead it does a double word load:

.L4:
movl(%ebp), %eax
jmp .L111

-- System Information
Debian Release: testing/unstable
Kernel Version: Linux gondolin 2.4.22-1-686-smp #5 SMP Sat Oct 4 14:35:05 EST 
2003 i686 GNU/Linux

Versions of the packages gcc depends on:
ii  cpp3.3.1-2The GNU C preprocessor.
ii  cpp-3.33.3.2-1The GNU C preprocessor
ii  gcc-3.33.3.2-1The GNU C compiler
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Bug#219949: gcc: linux-2.6/sound/core/oss/rate.c miscompiled

2003-11-10 Thread Falk Hueffner 
<[EMAIL PROTECTED]> writes:

> gcc -march=i386 -fomit-frame-pointer -O2
> 
> miscompiles sound/core/oss/rate.c in Linux 2.6.0-test9.
> 
> I've attached the preprocessed source that demonstrates the
> problem.

The attachment seems corrupted, can you please resend it or put it
somewhere?

-- 
Falk

Bug#220000: libstdc++5: largefile support (LFS) missing

2003-11-10 Thread giuseppe bonacci 
Package: libstdc++5
Version: 1:3.3.2-1
Severity: normal

In libstdc++5-3.3.2 large file support has disappeared (with respect to 
libstdc++2.10-glibc2.2).

C++ applications that manipulate large files, recompiled with g++-3.3,
might cause massive data corruption, unless they carefully test streams
for goodness before reading/writing.

The gcc team has fixed the bug, and the fix will ship with the 3.4
release.  See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=8610 for
reference.

Some code to show the bug:

# build a large file that actually occupies only a few disk blocks

$ echo 12 > large_file
$ dd if=/dev/zero of=large_file bs=1k count=1 seek=3000k conv=notrunc

# make C++ code for reading it:

$ cat > testlfs.cc <
#include 

int main() {
int i = -1;
std::ifstream f("large_file");
std::cout << "File is good? " << f.good() << std::endl;
if ( f.good() ) f >> i;
std::cout << "Value of i? " << i << std::endl;
}
EOF

# try different libraries:

$ g++-3.3  -Wall -D_FILE_OFFSET_BITS=64 testlfs.cc -o testlfs-3; ./testlfs-3
File is good? 0
Value of i? -1

$ g++-2.95 -Wall -D_FILE_OFFSET_BITS=64 testlfs.cc -o testlfs-2; ./testlfs-2
File is good? 1
Value of i? 12


-- System Information:
Debian Release: testing/unstable
Architecture: i386
Kernel: Linux bonacci 2.4.22-1-686 #6 Sat Oct 4 14:09:08 EST 2003 i686
Locale: LANG=C, LC_CTYPE=C

Versions of packages libstdc++5 depends on:
ii  gcc-3.3-base  1:3.3.2-1  The GNU Compiler Collection (base 
ii  libc6 2.3.2-9GNU C Library: Shared libraries an
ii  libgcc1   1:3.3.2-1  GCC support library

-- no debconf information

Bug#219949: gcc: linux-2.6/sound/core/oss/rate.c miscompiled

2003-11-10 Thread Herbert Xu 
On Mon, Nov 10, 2003 at 02:49:28PM +0100, Falk Hueffner wrote:
> 
> The attachment seems corrupted, can you please resend it or put it
> somewhere?

Sure.  I've just put it up at

http://gondor.apana.org.au/~herbert/bugs/rate.i.bz2
-- 
Debian GNU/Linux 3.0 is out! ( http://www.debian.org/ )
Email:  Herbert Xu ~{PmV>HI~} <[EMAIL PROTECTED]>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt