On Sun, Aug 31, 2014 at 12:39:12AM +0200, Axel Beckert wrote: > Control: retitle -1 gcc-4.9: Compiles zsh endlessly with > -fstack-protector-strong on s390x > > Hi, > > Matthias Klose wrote: > > if it's just zsh, then it's not serious. > > I doubt that it's only zsh. > > > Apparently there are some stability issues with some s390 machines, > > Looks rather like a regression than stability issues to me. It fails > _always_ with gcc-4.9 and default buildflags on s390x. But works fine > with gcc-4.8: > > $ debuild -eCC=gcc-4.8 > -eDEB_BUILD_MAINT_OPTIONS=hardening=-stackprotectorstrong -uc -us -B > > (Had to remove stackprotectorstrong as it doesn't seem to be available > with gcc-4.8.) > > > CC'ing the s390 porters. > > JFTR: I already X-Debbugs-Cc'ed them. > > I was able to to reproduce it in a sid chroot of zelenka, too. gcc-4.9 > hangs at this position: > > […].0.5-dev-2/obj/Src → gcc -c -I. -I../Src -I../../Src -I../../Src/Zle > -I../../Src -D_FORTIFY_SOURCE=2 -Q -DHAVE_CONFIG_H -g -O2 > -fstack-protector-strong -Wformat -Werror=format-security -Wall -g -o > builtin.o ../../Src/builtin.c > gnu_dev_major gnu_dev_minor gnu_dev_makedev read pread pread64 readlink > readlinkat getcwd getwd confstr getgroups ttyname_r getlogin_r gethostname > getdomainname getchar fgetc_unlocked getc_unlocked getchar_unlocked putchar > fputc_unlocked putc_unlocked putchar_unlocked getline feof_unlocked > ferror_unlocked sprintf vsprintf snprintf vsnprintf fprintf printf vprintf > vfprintf dprintf vdprintf asprintf __asprintf obstack_printf vasprintf > obstack_vprintf fgets fread fgets_unlocked fread_unlocked tolower toupper > stat lstat fstat fstatat mknod mknodat stat64 lstat64 fstat64 fstatat64 > __sigismember __sigaddset __sigdelset atoi atol atoll bsearch atof realpath > ptsname_r wctomb mbstowcs wcstombs __strcspn_c1 __strcspn_c2 __strcspn_c3 > __strspn_c1 __strspn_c2 __strspn_c3 __strpbrk_c2 __strpbrk_c3 __strtok_r_1c > __strsep_1c __strsep_2c __strsep_3c memcpy memmove mempcpy memset bcopy bzero > strcpy stpcpy strncpy stpncpy strcat strncat open open64 openat openat64 > btowc wctob mbrlen wmemcpy wmemmove wmempcpy wmemset wcscpy wcpcpy wcsncpy > wcpncpy wcscat wcsncat swprintf vswprintf wprintf fwprintf vwprintf vfwprintf > fgetws fgetws_unlocked wcrtomb mbsrtowcs wcsrtombs mbsnrtowcs wcsnrtombs > createbuiltintable printbuiltinnode freebuiltinnode init_builtins new_optarg > execbuiltin bin_enable bin_set bin_pwd bin_dirs set_pwd_env bin_cd > cd_get_dest cd_do_chdir cd_able_vars cd_try_chdir cd_new_pwd printdirstack > fixdir printqt printif bin_fc fcgetcomm fcsubs fclist fcedit getasg > typeset_setbase typeset_setwidth typeset_single bin_typeset eval_autoload > listusermathfunc bin_functions mkautofn bin_unset bin_whence bin_hash > bin_unhash bin_alias bin_true bin_false bin_print bin_shift bin_getopts > bin_break checkjobs zexit bin_dot eval bin_emulate bin_eval bin_read zread > testlex bin_test bin_times bin_trap bin_ttyctl bin_let bin_umask bin_notavail > Analyzing compilation unit > Performing interprocedural optimizations > <*free_lang_data> <visibility> <early_local_cleanups> <*free_inline_summary> > <whole-program> <profile_estimate> <devirt> <cp> <inline> <pure-const> > <static-var>Assembling functions: > bin_true bin_false testlex bin_enable bin_set listusermathfunc bin_dirs > bin_unhash fclist bin_unset bin_whence bin_shift bin_let bin_getopts bin_dot > eval bin_emulate bin_eval bin_times bin_trap bin_umask printbuiltinnode > bin_ttyctl freebuiltinnode bin_pwd typeset_setwidth.isra.4 > typeset_setbase.isra.5 fcgetcomm bin_fc typeset_single.isra.7 getasg bin_hash > bin_alias bin_print zread bin_read bin_test createbuiltintable init_builtins > execbuiltin set_pwd_env cd_able_vars fixdir > > As waldi noticed, it suffices to replace -fstack-protector-strong by > -fstack-protector (which was necessary for compiling with gcc-4.8 anyways) > and it does no more go into the endless loop: > > […].0.5-dev-2/obj/Src → gcc -c -I. -I../Src -I../../Src -I../../Src/Zle > -I../../Src -D_FORTIFY_SOURCE=2 -DHAVE_CONFIG_H -g -O2 -fstack-protector > -Wformat -Werror=format-security -Wall -g -o builtin.o ../../Src/builtin.c > > HTH > > I'll likely use > DEB_BUILD_MAINT_OPTIONS=hardening=-stackprotectorstrong to get zsh > building on s390x again for now, but I still think endless loops like > this one are a bug in the compiler. > > With this workaround, I'm also ok with the lowered severity as there > is a workaround which likely also works for other affected packages. >
Please note that the problem is fixed in upstream trunk as well as in the gcc-snapshot debian package. I'll try to identify the commit fixing it. -- Aurelien Jarno GPG: 4096R/1DDD8C9B aurel...@aurel32.net http://www.aurel32.net -- To UNSUBSCRIBE, email to debian-gcc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/20140903161335.gg15...@hall.aurel32.net
