#!/bin/bash

# Build Skia with one of Clang's many sanitizers.
#
# $ tools/xsan_build {address,thread,undefined,etc.} [any other flags to pass to make...]
#
# This script assumes the use of Clang >=3.2.
#
# For more information, see:
#   http://clang.llvm.org/docs/UsersManual.html#controlling-code-generation

set -e
set -x

here=$(cd `dirname $0`; echo `pwd`)
cores=48

echo "Bootstrapping CMake"
pushd $here/../third_party/externals/cmake
./bootstrap --parallel=$cores
make -j $cores cmake
popd

cmake=$here/../third_party/externals/cmake/bin/cmake

echo "Building Clang"
pushd $here/../third_party/externals/llvm
mkdir -p out/
cd out/
rm -f CMakeCache.txt   # Force CMake to re-configure, in case DEPS has changed.
$cmake -DCMAKE_BUILD_TYPE=Release -G Ninja ..
ninja
popd

export CC=$here/../third_party/externals/llvm/out/bin/clang
export CXX=$here/../third_party/externals/llvm/out/bin/clang++
$CC --version

if [[ "$1" == "memory" ]]; then
    echo "Building libc++ with MSAN"
    pushd $here/../third_party/externals/llvm
    mkdir -p msan_out/
    cd msan_out/
    rm -f CMakeCache.txt   # Force CMake to re-configure, in case DEPS has changed.
    $cmake -DLLVM_USE_SANITIZER=MemoryWithOrigins -DCMAKE_BUILD_TYPE=Release -G Ninja ..
    ninja cxx cxxabi   # No need to build all of LLVM+Clang with MSAN, just libc++.
    popd

    msan_out=$here/../third_party/externals/llvm/msan_out

    export GYP_DEFINES="skia_gpu=0 skia_no_fontconfig=1 skia_freetype_static=1 ${GYP_DEFINES}"
    export CXXFLAGS="-stdlib=libc++ -I$msan_out/include ${CXX_FLAGS}"
    export LDFLAGS="-stdlib=libc++ -L$msan_out/lib -Wl,-rpath,$msan_out/lib ${LDFLAGS}"
fi
export GYP_DEFINES="skia_sanitizer=$1 ${GYP_DEFINES}"

shift
make $@