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1 #!/bin/sh
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2
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3 # allocfail.sh -- Test for libbacktrace library.
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4 # Copyright (C) 2018-2020 Free Software Foundation, Inc.
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5
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6 # Redistribution and use in source and binary forms, with or without
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7 # modification, are permitted provided that the following conditions are
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8 # met:
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9
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10 # (1) Redistributions of source code must retain the above copyright
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11 # notice, this list of conditions and the following disclaimer.
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12
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13 # (2) Redistributions in binary form must reproduce the above copyright
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14 # notice, this list of conditions and the following disclaimer in
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15 # the documentation and/or other materials provided with the
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16 # distribution.
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17
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18 # (3) The name of the author may not be used to
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19 # endorse or promote products derived from this software without
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20 # specific prior written permission.
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21
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22 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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23 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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24 # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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25 # DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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26 # INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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27 # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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28 # SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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29 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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30 # STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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31 # IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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32 # POSSIBILITY OF SUCH DAMAGE.
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33
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34 set -e
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35
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36 if [ ! -f ./allocfail ]; then
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37 # Hard failure.
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38 exit 99
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39 fi
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40
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41 allocs=$(./allocfail 2>&1)
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42 if [ "$allocs" = "" ]; then
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43 # Hard failure.
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44 exit 99
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45 fi
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46
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47 # This generates the following output:
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48 # ...
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49 # $ allocfail.sh
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50 # allocs: 80495
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51 # Status changed to 0 at 1
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52 # Status changed to 1 at 3
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53 # Status changed to 0 at 11
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54 # Status changed to 1 at 12
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55 # Status changed to 0 at 845
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56 # ...
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57 #
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58 # We have status 0 for an allocation failure at:
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59 # - 1 because backtrace_create_state handles failure robustly
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60 # - 2 because the fail switches backtrace_full to !can_alloc mode.
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61 # - 11 because failure of elf_open_debugfile_by_buildid does not generate an
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62 # error callback beyond the one for the allocation failure itself.
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63
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64 echo "allocs: $allocs"
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65
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66 step=1
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67 i=1
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68 passes=0
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69 prev_status=-1
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70 while [ $i -le $allocs ]; do
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71 if ./allocfail $i >/dev/null 2>&1; status=$?; then
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72 true
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73 fi
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74 if [ $status -gt 1 ]; then
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75 echo "Unallowed fail found: $i"
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76 # Failure.
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77 exit 1
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78 fi
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79
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80 # The test-case would run too long if we would excercise all allocs.
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81 # So, run with step 1 initially, and increase the step once we have 10
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82 # subsequent passes, and drop back to step 1 once we encounter another
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83 # failure. This takes ~2.6 seconds on an i7-6600U CPU @ 2.60GHz.
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84 if [ $status -eq 0 ]; then
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85 passes=$(($passes + 1))
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86 if [ $passes -ge 10 ]; then
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87 step=$((step * 10))
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88 passes=0
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89 fi
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90 elif [ $status -eq 1 ]; then
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91 passes=0
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92 step=1
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93 fi
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94
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95 if [ $status -ne $prev_status ]; then
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96 echo "Status changed to $status at $i"
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97 fi
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98 prev_status=$status
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99
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100 i=$(($i + $step))
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101 done
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102
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103 # Success.
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104 exit 0
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