guile/test-suite/standalone/test-fast-slot-ref.in

#!/bin/sh

# Copyright (C) 2006 Free Software Foundation, Inc.
#
# This library is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or (at
# your option) any later version.
#
# This library is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
# License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

# Test for %fast-slot-ref, which was previously implemented such that
# an out-of-range slot index could escape being properly detected, and
# could then cause a segmentation fault.
#
# Prior to the change in this commit to goops.c, the following
# sequence reliably causes a segmentation fault on my GNU/Linux when
# executing the (%fast-slot-ref i 3) line.  For reasons as yet
# unknown, it does not cause a segmentation fault if the same code is
# loaded as a script; that is why we run it here using "guile -q <<EOF".
exec guile -q -l @top_builddir_absolute@/libguile/stack-limit-calibration.scm >/dev/null 2>&1 <<EOF
(use-modules (oop goops))
(define-module (oop goops))
(define-class <c> () (a #:init-value 1) (b #:init-value 2) (c #:init-value 3))
(define i (make <c>))
(%fast-slot-ref i 1)
(%fast-slot-ref i 0)
(%fast-slot-ref i 3)
(%fast-slot-ref i -1)
(%fast-slot-ref i 2)
(exit 0)
EOF