Re: Bug#563882: git-core FTBFS on ia64: t1001-read-tree-m-2way.sh test fails
On Tue, Jan 26, 2010 at 04:06:32PM -0600, Jonathan Nieder wrote:
> Bastian Blank wrote:
>
> > The following program shows the cause:
> >
> > | #include <sys/stat.h>
> > | #include <sys/mman.h>
> > | #include <fcntl.h>
> > |
> > | int main(int argc, const char * const argv[])
> > | {
> > | struct stat st;
> > | lstat(argv[1], &st);
> > |
> > | int fd = open(argv[1], O_RDONLY);
> > | void *data = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
> > | void *t = memchr(data, 0, st.st_size);
> > | printf("ptr: %p, ret: %p, len: 0x%zx\n", data, t, st.st_size);
> > | return 0;
> > | }
> >
> > Example output:
> > | % ./test /etc/passwd
> > | ptr: 0x2000000000050000, ret: 0x200000000005040e, len: 0x40e
> >
> > The found location is already after the buffer. memchr is AFAIK expanded
> > by gcc.
>
> FYI: http://sourceware.org/bugzilla/show_bug.cgi?id=10162
> Maybe glibc 2.11.1 (which includes a cherry-pick of commit 6622141)
> will fix this.
>
This patch is already included in the Debian libc6 package. It actually
may be the cause of the problem you reported.
--
Aurelien Jarno GPG: 1024D/F1BCDB73
aurelien@aurel32.net http://www.aurel32.net
Reply to: