[Bug c/39394] gcc 4.4.0 20090306 segfaults at argp-help.c in glibc 2.7 and 2.9
--- Comment #2 from cneil at yahoo dot com 2009-03-09 09:58 --- I think I'm hitting the same bug as the reporter. i686-pc-linux-gnu-gcc argp-help.c -c -std=gnu99 -fgnu89-inline -O2 -Wall -Winline -Wwrite-strings -fmerge-all-constants -fno-strict-aliasing -ggdb -march=i686 -pipe -Wstrict-prototypes -mpreferred-stack-boundary=2 -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES -fexceptions -mpreferred-stack-boundary=4 -fexceptions -I../include -I/var/tmp/portage/sys-libs/glibc-2.9_p20081201-r2/work/build-default-i686-pc-linux-gnu-nptl/argp -I/var/tmp/portage/sys-libs/glibc-2.9_p20081201-r2/work/build-default-i686-pc-linux-gnu-nptl -I../sysdeps/i386/elf -I../nptl/sysdeps/unix/sysv/linux/i386/i686 -I../nptl/sysdeps/unix/sysv/linux/i386 -I../sysdeps/unix/sysv/linux/i386 -I../nptl/sysdeps/unix/sysv/linux -I../nptl/sysdeps/pthread -I../sysdeps/pthread -I../ports/sysdeps/unix/sysv/linux -I../sysdeps/unix/sysv/linux -I../sysdeps/gnu -I../sysdeps/unix/common -I../sysdeps/unix/mman -I../sysdeps/unix/inet -I../ports/sysdeps/unix/sysv/i386 -I../sysdeps/unix/sysv/i386 -I../nptl/sysdeps/unix/sysv -I../ports/sysdeps/unix/sysv-I../sysdeps/unix/sysv -I../sysdeps/unix/i386 -I../nptl/sysdeps/unix -I../ports/sysdeps/unix -I../sysdeps/unix -I../sysdeps/posix -I../sysdeps/i386/i686/fpu -I../nptl/sysdeps/i386/i686 -I../sysdeps/i386/i686 -I../sysdeps/i386/i486 -I../nptl/sysdeps/i386/i486 -I../sysdeps/i386/fpu -I../nptl/sysdeps/i386 -I../sysdeps/i386 -I../sysdeps/wordsize-32 -I../sysdeps/ieee754/ldbl-96 -I../sysdeps/ieee754/dbl-64 -I../sysdeps/ieee754/flt-32 -I../sysdeps/ieee754 -I../sysdeps/generic/elf -I../sysdeps/generic -I../nptl -I../ports -I.. -I../libio -I. -nostdinc -isystem /usr/lib/gcc/i686-pc-linux-gnu/4.4.0-alpha20090306/include -isystem /usr/lib/gcc/i686-pc-linux-gnu/4.4.0-alpha20090306/include-fixed -isystem /usr/include -D_LIBC_REENTRANT -include ../include/libc-symbols.h -U_FORTIFY_SOURCE -U_FORTIFY_SOURCE -o /var/tmp/portage/sys-libs/glibc-2.9_p20081201-r2/work/build-default-i686-pc-linux-gnu-nptl/argp/argp-help.o -MD -MP -MF /var/tmp/portage/sys-libs/glibc-2.9_p20081201-r2/work/build-default-i686-pc-linux-gnu-nptl/argp/argp-help.o.dt -MT /var/tmp/portage/sys-libs/glibc-2.9_p20081201-r2/work/build-default-i686-pc-linux-gnu-nptl/argp/argp-help.o argp-help.c: In function #8216;print_header#8217;: argp-help.c:1024: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See http://bugs.gentoo.org/ for instructions. This is from a gentoo ebuild, but no patches are being applied. I'm using the gcc-4.4 snapshot from 20090306, and argp-help.c is from a glibc-2.9 snapshot from 20091201. I used -save-temps to get a preprocessed file (I'll attach momentarily) and did a little trial-and-error experimenting. Here's what I found: gcc -c argp-help.i -o argp-help.o -O0 : succeeds gcc -c argp-help.i -o argp-help.o -O1 : fails gcc -c argp-help.i -o argp-help.o -O1 -fno-inline : succeeds This is on an i686 (athlon-xp) machine, but I get the same failure on my x86_64 (amdfam10) machine. Here's my output from gcc -v (on the athlon-xp machine): Using built-in specs. Target: i686-pc-linux-gnu Configured with: /var/tmp/portage/sys-devel/gcc-4.4.0_alpha20090306/work/gcc-4.4-20090306/configure --prefix=/usr --bindir=/usr/i686-pc-linux-gnu/gcc-bin/4.4.0-alpha20090306 --includedir=/usr/lib/gcc/i686-pc-linux-gnu/4.4.0-alpha20090306/include --datadir=/usr/share/gcc-data/i686-pc-linux-gnu/4.4.0-alpha20090306 --mandir=/usr/share/gcc-data/i686-pc-linux-gnu/4.4.0-alpha20090306/man --infodir=/usr/share/gcc-data/i686-pc-linux-gnu/4.4.0-alpha20090306/info --with-gxx-include-dir=/usr/lib/gcc/i686-pc-linux-gnu/4.4.0-alpha20090306/include/g++-v4 --host=i686-pc-linux-gnu --build=i686-pc-linux-gnu --disable-altivec --disable-fixed-point --enable-nls --without-included-gettext --with-system-zlib --disable-checking --disable-werror --enable-secureplt --disable-multilib --enable-libmudflap --disable-libssp --enable-libgomp --enable-cld --enable-java-awt=gtk --with-arch=i686 --enable-objc-gc --enable-languages=c,c++,java,objc,obj-c++,fortran --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu --with-bugurl=http://bugs.gentoo.org/ --with-pkgversion='Gentoo 4.4.0_alpha20090306' --without-ppl --without-cloog --disable-ppl-version-check --disable-cloog-version-check Thread model: posix gcc version 4.4.0-alpha20090306 (experimental) (Gentoo 4.4.0_alpha20090306) -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39394
[Bug c/39394] gcc 4.4.0 20090306 segfaults at argp-help.c in glibc 2.7 and 2.9
--- Comment #3 from cneil at yahoo dot com 2009-03-09 10:00 --- Created an attachment (id=17427) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17427action=view) preprocessed argp-help.c If any additional information is needed, I'll do my best to provide it. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39394
[Bug c/39394] gcc 4.4.0 20090306 segfaults at argp-help.c in glibc 2.7 and 2.9
--- Comment #4 from cneil at yahoo dot com 2009-03-09 10:14 --- OK, maybe I should slept before I submitted this. 1. The glibc-2.9 snapshot is from 20081201. I am not capable of time travel. 2. I successfully compiled this same glibc-2.9 snapshot with the gcc-4.4 snapshot from 20090220. Hopefully this helps. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39394
[Bug c/39394] gcc 4.4.0 20090306 segfaults at argp-help.c in glibc 2.7 and 2.9
--- Comment #6 from jakub at gcc dot gnu dot org 2009-03-09 11:09 ---
Confirmed. Simplified testcase:
extern inline void *
asmfn (void *dest, const void *src, unsigned long n)
{
asm volatile (
: =m (*(struct { char x[n]; } *) dest)
: r (n), r (dest), r (src),
m (*(struct { char x[n]; } *) src)
: cc);
return dest;
}
extern inline void
baz (char *dest, const char *str, unsigned long len)
{
if (__builtin_constant_p (len))
asmfn (dest, str, len + 1);
else
asmfn (dest, str, len);
}
extern inline void
bar (char *dest, const char *str)
{
baz (dest, str, __builtin_strlen (str));
}
void
foo (char *dest, const char *str)
{
bar (dest, str);
}
--
jakub at gcc dot gnu dot org changed:
What|Removed |Added
Component|tree-optimization |c
Keywords|ice-on-valid-code |
Known to fail|4.4.0 |
Known to work|4.3.1 |
Priority|P3 |P1
Last reconfirmed|-00-00 00:00:00 |2009-03-09 11:09:57
date||
Summary|[4.4 regression] ICE in |gcc 4.4.0 20090306 segfaults
|copy_tree_body_r|at argp-help.c in glibc 2.7
||and 2.9
Target Milestone|--- |4.4.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39394
[Bug c/39394] gcc 4.4.0 20090306 segfaults at argp-help.c in glibc 2.7 and 2.9
--- Comment #1 from kdebugs at hotmail dot com 2009-03-08 09:18 --- I don't know if these lines (from my memory) might be useful: In fuction 'print_header' argp-help.c:1024 -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39394
