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d665cd9b13
Add test-case that forces alloc.c functions to fail, and check whether fail handling is robust. This is the test-case for "[libbacktrace] Fix segfault upon allocation failure". Without that patch, this test-case fails like this: ... allocfail.sh: line 71: 26041 Segmentation fault (core dumped) \ ./allocfail $i > /dev/null 2>&1 Unallowed fail found: 13 FAIL allocfail.sh (exit status: 1) ... This is a seperate patch because the test-case is nontrivial. Bootstrapped and reg-tested on x86_64. 2018-12-12 Tom de Vries <tdevries@suse.de> * Makefile.am (TESTS): Add allocfail.sh. (check_PROGRAMS): Add allocfail. * Makefile.in: Regenerate. * instrumented_alloc.c: New file. Redefine malloc and realloc. Include alloc.c. * allocfail.c: New file. * allocfail.sh: New file. From-SVN: r267054
106 lines
3.1 KiB
Bash
Executable File
106 lines
3.1 KiB
Bash
Executable File
#!/bin/sh
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# allocfail.sh -- Test for libbacktrace library.
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# Copyright (C) 2018 Free Software Foundation, Inc.
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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# (1) Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# (2) Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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# (3) The name of the author may not be used to
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# endorse or promote products derived from this software without
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# specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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# IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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set -e
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set -o pipefail
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if [ ! -f ./allocfail ]; then
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# Hard failure.
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exit 99
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fi
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allocs=$(./allocfail 2>&1)
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if [ "$allocs" = "" ]; then
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# Hard failure.
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exit 99
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fi
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# This generates the following output:
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# ...
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# $ allocfail.sh
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# allocs: 80495
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# Status changed to 0 at 1
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# Status changed to 1 at 3
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# Status changed to 0 at 11
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# Status changed to 1 at 12
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# Status changed to 0 at 845
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# ...
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#
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# We have status 0 for an allocation failure at:
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# - 1 because backtrace_create_state handles failure robustly
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# - 2 because the fail switches backtrace_full to !can_alloc mode.
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# - 11 because failure of elf_open_debugfile_by_buildid does not generate an
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# error callback beyond the one for the allocation failure itself.
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echo "allocs: $allocs"
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step=1
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i=1
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passes=0
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prev_status=-1
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while [ $i -le $allocs ]; do
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if ./allocfail $i >/dev/null 2>&1; status=$?; then
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true
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fi
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if [ $status -gt 1 ]; then
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echo "Unallowed fail found: $i"
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# Failure.
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exit 1
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fi
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# The test-case would run too long if we would excercise all allocs.
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# So, run with step 1 initially, and increase the step once we have 10
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# subsequent passes, and drop back to step 1 once we encounter another
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# failure. This takes ~2.6 seconds on an i7-6600U CPU @ 2.60GHz.
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if [ $status -eq 0 ]; then
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passes=$(($passes + 1))
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if [ $passes -ge 10 ]; then
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step=$((step * 10))
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passes=0
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fi
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elif [ $status -eq 1 ]; then
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passes=0
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step=1
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fi
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if [ $status -ne $prev_status ]; then
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echo "Status changed to $status at $i"
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fi
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prev_status=$status
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i=$(($i + $step))
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done
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# Success.
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exit 0
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