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#!/usr/bin/env bash
if [ $# -eq 0 ]; then
echo "Script for enabling CLang sanitizers for debug builds."
echo "*Only tested on Ubuntu x64."
echo "*This script must be 'sourced' (via dot+space) so that changes to environment variables are preserved. Run like this:"
if [ "$(dirname $0)" = "." ]; then
echo " . enablesanitizers.sh [options]"
else
echo " cd $(dirname $0);. enablesanitizers.sh [options]; cd -"
fi
echo "Usage: [asan] [ubsan] [lsan] [all] [off] [clangx.y]"
echo " asan: optional argument to enable Address Sanitizer."
echo " ubsan: optional argument to enable Undefined Behavior Sanitizer."
echo " lsan - optional argument to enable memory Leak Sanitizer."
echo " all - optional argument to enable asan, ubsan and lsan."
echo " off - optional argument to turn off all sanitizers."
echo " clangx.y - optional argument to specify clang version x.y. which is used to resolve stack traces. Default is 3.6"
else
# default to clang 3.6 instead of 3.5 because it supports print_stacktrace (otherwise only one stack frame)
__ClangMajorVersion=3
__ClangMinorVersion=6
__EnableASan=0
__EnableUBSan=0
__EnableLSan=0
__TurnOff=0
__Options=
__ExportSymbolizerPath=1
for i in "$@"
do
lowerI="$(echo $i | awk '{print tolower($0)}')"
case $lowerI in
asan)
__EnableASan=1
;;
ubsan)
__EnableUBSan=1
;;
lsan)
__EnableASan=1
__EnableLSan=1
;;
all)
__EnableASan=1
__EnableUBSan=1
__EnableLSan=1
;;
off)
__TurnOff=1
;;
clang3.5)
__ClangMajorVersion=3
__ClangMinorVersion=5
;;
clang3.6)
__ClangMajorVersion=3
__ClangMinorVersion=6
;;
clang3.7)
__ClangMajorVersion=3
__ClangMinorVersion=7
__ExportSymbolizerPath=0
;;
clang3.8)
__ClangMajorVersion=3
__ClangMinorVersion=8
__ExportSymbolizerPath=0
;;
clang3.9)
__ClangMajorVersion=3
__ClangMinorVersion=9
__ExportSymbolizerPath=0
;;
*)
echo "Unknown arg: $i"
return 1
esac
done
if [ $__TurnOff == 1 ]; then
unset DEBUG_SANITIZERS
echo "Setting DEBUG_SANITIZERS="
else
# for now, specify alloc_dealloc_mismatch=0 as there are too many error reports that are not an issue
ASAN_OPTIONS="symbolize=1 alloc_dealloc_mismatch=0"
# when Clang 3.8 available, add: suppressions=$(readlink -f sanitizersuppressions.txt)
UBSAN_OPTIONS="print_stacktrace=1"
if [ $__EnableASan == 1 ]; then
__Options="$__Options asan"
fi
if [ $__EnableUBSan == 1 ]; then
__Options="$__Options ubsan"
fi
if [ $__EnableLSan == 1 ]; then
ASAN_OPTIONS="$ASAN_OPTIONS detect_leaks=1"
else
ASAN_OPTIONS="$ASAN_OPTIONS detect_leaks=0"
fi
# passed to build.sh
DEBUG_SANITIZERS="$__Options"
export DEBUG_SANITIZERS
echo "Setting DEBUG_SANITIZERS=$DEBUG_SANITIZERS"
# used by ASan at run-time
export ASAN_OPTIONS
echo "Setting ASAN_OPTIONS=\"$ASAN_OPTIONS\""
export UBSAN_OPTIONS
echo "Setting UBSAN_OPTIONS=\"$UBSAN_OPTIONS\""
# for compiler-rt > 3.6 Asan check that binary name is 'llvm-symbolizer', 'addr2line' or
# 'atos' (for Darwin) otherwise it returns error
if [ $__ExportSymbolizerPath == 1 ]; then
# used by ASan at run-time
ASAN_SYMBOLIZER_PATH="/usr/bin/llvm-symbolizer-$__ClangMajorVersion.$__ClangMinorVersion"
export ASAN_SYMBOLIZER_PATH
echo "Setting ASAN_SYMBOLIZER_PATH=$ASAN_SYMBOLIZER_PATH"
else
unset ASAN_SYMBOLIZER_PATH
fi
echo "Done. You can now run: build.sh Debug clang$__ClangMajorVersion.$__ClangMinorVersion"
fi
unset __ClangMajorVersion
unset __ClangMinorVersion
unset __EnableASan
unset __EnableUBSan
unset __EnableLSan
unset __TurnOff
unset __Options
fi
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