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#!/bin/sh
# allocfail.sh -- Test for libbacktrace library.
# Copyright (C) 2018-2022 Free Software Foundation, Inc.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
# (1) Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# (2) Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# (3) The name of the author may not be used to
# endorse or promote products derived from this software without
# specific prior written permission.
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
# IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
set -e
if [ ! -f ./allocfail ]; then
# Hard failure.
exit 99
fi
allocs=$(./allocfail 2>&1)
if [ "$allocs" = "" ]; then
# Hard failure.
exit 99
fi
# This generates the following output:
# ...
# $ allocfail.sh
# allocs: 80495
# Status changed to 0 at 1
# Status changed to 1 at 3
# Status changed to 0 at 11
# Status changed to 1 at 12
# Status changed to 0 at 845
# ...
#
# We have status 0 for an allocation failure at:
# - 1 because backtrace_create_state handles failure robustly
# - 2 because the fail switches backtrace_full to !can_alloc mode.
# - 11 because failure of elf_open_debugfile_by_buildid does not generate an
# error callback beyond the one for the allocation failure itself.
echo "allocs: $allocs"
step=1
i=1
passes=0
prev_status=-1
while [ $i -le $allocs ]; do
if ./allocfail $i >/dev/null 2>&1; status=$?; then
true
fi
if [ $status -gt 1 ]; then
echo "Unallowed fail found: $i"
# Failure.
exit 1
fi
# The test-case would run too long if we would excercise all allocs.
# So, run with step 1 initially, and increase the step once we have 10
# subsequent passes, and drop back to step 1 once we encounter another
# failure. This takes ~2.6 seconds on an i7-6600U CPU @ 2.60GHz.
if [ $status -eq 0 ]; then
passes=$(($passes + 1))
if [ $passes -ge 10 ]; then
step=$((step * 10))
passes=0
fi
elif [ $status -eq 1 ]; then
passes=0
step=1
fi
if [ $status -ne $prev_status ]; then
echo "Status changed to $status at $i"
fi
prev_status=$status
i=$(($i + $step))
done
# Success.
exit 0
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