validation-test/BuildSystem/LTO/host-libraries-do-have-bitcode.test-sh

#!/usr/bin/env bash

# This test makes sure that if lto is enabled and that all host libraries
# contain only bitcode.
#
# *NOTE* This will not trigger for embedded bitcode sections since to file those
# are still mach-o files and come up as such.

set -e
set -u

# REQUIRES: lto
# REQUIRES: OS=macosx
# RUN: %s %swift_obj_root %t

function check_thin_archive_for_bitcode() {
    set -e
    set -u
    set -o pipefail

    pushd . 1>/dev/null

    local BASE_TEMPDIR=$1
    local ARCHIVE=$2

    local LIB_NAME=$(basename ${ARCHIVE})
    local LIB_ARCH=$(basename $(dirname ${ARCHIVE}))
    local LIB_PLATFORM=$(basename $(dirname $(dirname ${ARCHIVE})))

    LIB_TEMP_DIR="${BASE_TEMPDIR}/${LIB_PLATFORM}-${LIB_ARCH}-${LIB_NAME}"
    mkdir -p "${LIB_TEMP_DIR}"
    cd "${LIB_TEMP_DIR}"
    ar -x ${ARCHIVE}
    if [[ -n "$(find ./ -iname '*.o' -exec file {} \; | grep -e bitcode -e bit-code)" ]]; then
        echo "Found bitcode file in thin archive: ${ARCHIVE}"
    else
        echo "No bitcode in thin archive: ${ARCHIVE}"
        exit 1
    fi
    popd 1>/dev/null

    set +o pipefail
    set +u
    set +e
}
export -f check_thin_archive_for_bitcode

function check_thick_archive_for_bitcode() {
    set -e
    set -u
    set -o pipefail

    pushd . 1>/dev/null

    local BASE_TEMPDIR=$1
    local ARCHIVE=$2

    local LIB_NAME=$(basename ${ARCHIVE})
    local LIB_PLATFORM=$(basename $(dirname ${ARCHIVE}))

    LIB_TEMP_DIR="${BASE_TEMPDIR}/${LIB_PLATFORM}-thick-${LIB_NAME}"
    LIB_ARCHIVE_DIR="${LIB_TEMP_DIR}/archive"
    LIB_OBJECT_DIR="${LIB_TEMP_DIR}/object"

    mkdir -p "${LIB_TEMP_DIR}"
    mkdir -p "${LIB_ARCHIVE_DIR}"
    mkdir -p "${LIB_OBJECT_DIR}"

    ARCHS=( $(lipo -info ${ARCHIVE} | cut -f 3 -d ":" ) )
    cd ${LIB_OBJECT_DIR}
    for arch in "${ARCHS[@]}"; do
        pushd . 1>/dev/null
        local THIN_ARCHIVE="${LIB_NAME}.${arch}"
        lipo -thin "${arch}" -output "${LIB_ARCHIVE_DIR}/${THIN_ARCHIVE}" "${ARCHIVE}"
        mkdir ${arch}
        cd ${arch}
        ar -x "${LIB_ARCHIVE_DIR}/${THIN_ARCHIVE}"

        if [[ -n "$(find ./ -iname '*.o' -exec file {} \; | grep -e bitcode -e bit-code)" ]]; then
            echo "Found bitcode file in thin archive: ${THIN_ARCHIVE}. Taken from thick archive: ${ARCHIVE}"
        else
            echo "No bitcode in thin archive: ${THIN_ARCHIVE}. Taken from thick archive: ${ARCHIVE}"
            exit 1
        fi

        popd 1>/dev/null
    done
    popd 1>/dev/null

    set +o pipefail
    set +u
    set +e
}
export -f check_thick_archive_for_bitcode

OBJROOT=$(cd ${1} && pwd)
TEMPDIR=${2}

rm -rf $TEMPDIR
mkdir -p $TEMPDIR

THIN_ARCHIVES=( \
    $(find ${OBJROOT}/lib -depth 1 -iname '*.a' -exec lipo -info {} \; | grep "Non-fat file" | cut -f 3 -d " ") \
)

if [[ ${#THIN_ARCHIVES[@]} -gt 0 ]]; then
    echo "${THIN_ARCHIVES[@]}" | xargs -n 1 -P 8 bash -c "check_thin_archive_for_bitcode \"${TEMPDIR}\" \${1}" --
fi

THICK_ARCHIVES=( \
   $(find ${OBJROOT}/lib -depth 1 -iname '*.a' -exec lipo -info {} \; | grep "Architectures in the fat file" | cut -f 6 -d " ") \
)

if [[ ${#THICK_ARCHIVES[@]} -gt 0 ]]; then
    echo "${THICK_ARCHIVES[@]}" | xargs -n 1 -P 8 bash -c "check_thick_archive_for_bitcode \"${TEMPDIR}\" \${1}" --
fi

set +o pipefail
set +u
set +e