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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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