#!/bin/bash

set -e

# file:///usr/share/doc/clang/html/UsersManual.html#controlling-code-generation

sanitize=${sanitize:-memory}

sanitize_other="bounds,bool,enum,null"

compiler_flags=""

build_dir=build-clang-$sanitize

utils_dir=$(dirname $(readlink -f "$0"))

src_dir=$utils_dir/..

steps=(

    clean

    cmake

    make

    run

    )

if [ -n "$CLANG_ROOT" ]; then

    export PATH=$CLANG_ROOT:$PATH

fi

CXX=${CXX:-clang++}

if [ "$sanitize" == "address" ]; then

    sanitize_other="$sanitize_other,address-full,init-order"

    export ASAN_SYMBOLIZER_PATH=${ASAN_SYMBOLIZER_PATH:-$(which llvm-symbolizer)}

    export ASAN_OPTIONS=${ASAN_OPTIONS:-"detect_leaks=1 detect_stack_use_after_return=1 print_stats=1"}

elif [ "$sanitize" == "memory" ]; then

    compiler_flags="$compiler_flags -fsanitize-memory-track-origins"

    # from https://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/msan/msan.cc

    export MSAN_SYMBOLIZER_PATH=${MSAN_SYMBOLIZER_PATH:-$(which llvm-symbolizer)}

    export MSAN_OPTIONS=${MSAN_OPTIONS:-"keep_going=1 halt_on_error=0 report_umrs=0"}

elif [ "$sanitize" == "thread" ]; then

    echo

fi

echo "=== Using $sanitize sanitizer (directory \"$build_dir\") ==="

step=2

if [ -d "$build_dir" ]; then

    echo "Select starting point:"

    select step in "${steps[@]}"; do step=$REPLY; break; done

fi

has_step () {

    [[ $step -le $1 ]]

}

has_step "${#steps[*]}"

if has_step 1; then

    rm -r "$build_dir" || exit 1

fi

mkdir -p "$build_dir"

cd "$build_dir"

if has_step 2; then

    cmake \

        -DCMAKE_INSTALL_PREFIX="$PWD/install" \

        -DCMAKE_CXX_COMPILER="$CXX" \

        -DCMAKE_CXX_FLAGS="-fsanitize=$sanitize,$sanitize_other $compiler_flags -fno-omit-frame-pointer" \

        -DCMAKE_BUILD_TYPE=Debug \

        "$src_dir"

fi

if has_step 3; then

    make -j4 install

fi

if has_step 4; then

    ./copyq -s test1 "$@"

fi