Bug #12118
Updated by naruse (Yui NARUSE) over 8 years ago
Hello! On Motorola 680x0, ruby2.2 and ruby2.3 segfault when running the Ruby interpretor: ./miniruby -I./lib -I. -I.ext/common ./tool/runruby.rb --extout=.ext -- --disable-gems -r./m68k-linux-gnu-fake ./tool/rbinstall.rb --make="/usr/bin/make" --dest-dir="/<<PKGBUILDDIR>>/debian/tmp" --extout=".ext" --mflags="-w" --make-flags="w -- DESTDIR=/<<PKGBUILDDIR>>/debian/tmp" --data-mode=0644 --prog-mode=0755 --installed-list .installed.list --mantype="doc" installing binary commands: /usr/bin /<<PKGBUILDDIR>>/lib/fileutils.rb:250: [BUG] Segmentation fault at 0x5f583332 ruby 2.3.0p0 (2015-12-25) [m68k-linux-gnu] This happens while building ruby2.3 on Debian, for example [1]. Andreas Schwab has already investigated into this issue and he came up with the following patch for ruby2.2 [2]: ```diff Index: ruby-2.2.3/thread_pthread.c =================================================================== --- ruby-2.2.3.orig/thread_pthread.c +++ ruby-2.2.3/thread_pthread.c @@ -678,15 +678,14 @@ reserve_stack(volatile char *limit, size limit += size; if (limit > end) { size = limit - end; - limit = alloca(size); + limit = alloca(stack_check_margin+size); limit[stack_check_margin+size-1] = 0; } } else { limit -= size; if (buf > limit) { - limit = alloca(buf - limit); - limit -= stack_check_margin; + limit = alloca(buf - limit + stack_check_margin); limit[0] = 0; } } ``` The same patch works fine on ruby2.3, I although I had to modify it so it still applies the same way in ruby2.3. The bug can be reproduced in a qemu-m68k chroot environment which can be set up quite easily [3]. It would be very important for Debian's Motorola 680x0 port to get this issue fixed. Thanks, Adrian > [1] https://buildd.debian.org/status/fetch.php?pkg=ruby2.3&arch=m68k&ver=2.3.0-2&stamp=1455092994 > [2] https://lists.debian.org/debian-68k/2015/11/msg00057.html > [3] https://wiki.debian.org/M68k/sbuildQEMU