#!/bin/bash
#
# Runner for an individual run-test.

msg() {
    if [ "$QUIET" = "n" ]; then
        echo "$@"
    fi
}

ANDROID_ROOT="/system"
ARCHITECTURES_32="(arm|x86|mips|none)"
ARCHITECTURES_64="(arm64|x86_64|mips64|none)"
ARCHITECTURES_PATTERN="${ARCHITECTURES_32}"
BOOT_IMAGE=""
COMPILE_FLAGS=""
DALVIKVM="dalvikvm32"
DEBUGGER="n"
DEV_MODE="n"
DEX2OAT=""
EXPERIMENTAL=""
FALSE_BIN="/system/bin/false"
FLAGS=""
GDB=""
GDB_ARGS=""
GDB_SERVER="gdbserver"
HAVE_IMAGE="y"
HOST="n"
INTERPRETER="n"
JIT="n"
INVOKE_WITH=""
ISA=x86
LIBRARY_DIRECTORY="lib"
MAIN=""
OPTIMIZE="y"
PATCHOAT=""
PREBUILD="y"
QUIET="n"
RELOCATE="y"
STRIP_DEX="n"
SECONDARY_DEX=""
TIME_OUT="gdb"  # "n" (disabled), "timeout" (use timeout), "gdb" (use gdb)
# Value in seconds
if [ "$ART_USE_READ_BARRIER" = "true" ]; then
  TIME_OUT_VALUE=1800  # 30 minutes.
else
  TIME_OUT_VALUE=1200  # 20 minutes.
fi
USE_GDB="n"
USE_JVM="n"
VERIFY="y" # y=yes,n=no,s=softfail
ZYGOTE=""
DEX_VERIFY=""
USE_DEX2OAT_AND_PATCHOAT="y"
INSTRUCTION_SET_FEATURES=""
ARGS=""

while true; do
    if [ "x$1" = "x--quiet" ]; then
        QUIET="y"
        shift
    elif [ "x$1" = "x--lib" ]; then
        shift
        if [ "x$1" = "x" ]; then
            echo "$0 missing argument to --lib" 1>&2
            exit 1
        fi
        LIB="$1"
        shift
    elif [ "x$1" = "x--gc-stress" ]; then
        # Give an extra 5 mins if we are gc-stress.
        TIME_OUT_VALUE=$((${TIME_OUT_VALUE} + 300))
        shift
    elif [ "x$1" = "x--testlib" ]; then
        shift
        if [ "x$1" = "x" ]; then
            echo "$0 missing argument to --testlib" 1>&2
            exit 1
        fi
        ARGS="${ARGS} $1"
        shift
    elif [ "x$1" = "x--args" ]; then
        shift
        if [ "x$1" = "x" ]; then
            echo "$0 missing argument to --args" 1>&2
            exit 1
        fi
        ARGS="${ARGS} $1"
        shift
    elif [ "x$1" = "x-Xcompiler-option" ]; then
        shift
        option="$1"
        FLAGS="${FLAGS} -Xcompiler-option $option"
        COMPILE_FLAGS="${COMPILE_FLAGS} $option"
        shift
    elif [ "x$1" = "x--runtime-option" ]; then
        shift
        option="$1"
        FLAGS="${FLAGS} $option"
        shift
    elif [ "x$1" = "x--boot" ]; then
        shift
        BOOT_IMAGE="$1"
        shift
    elif [ "x$1" = "x--no-dex2oat" ]; then
        DEX2OAT="-Xcompiler:${FALSE_BIN}"
        USE_DEX2OAT_AND_PATCHOAT="n"
        shift
    elif [ "x$1" = "x--no-patchoat" ]; then
        PATCHOAT="-Xpatchoat:${FALSE_BIN}"
        USE_DEX2OAT_AND_PATCHOAT="n"
        shift
    elif [ "x$1" = "x--relocate" ]; then
        RELOCATE="y"
        shift
    elif [ "x$1" = "x--no-relocate" ]; then
        RELOCATE="n"
        shift
    elif [ "x$1" = "x--prebuild" ]; then
        PREBUILD="y"
        shift
    elif [ "x$1" = "x--strip-dex" ]; then
        STRIP_DEX="y"
        shift
    elif [ "x$1" = "x--host" ]; then
        HOST="y"
        ANDROID_ROOT="$ANDROID_HOST_OUT"
        shift
    elif [ "x$1" = "x--no-prebuild" ]; then
        PREBUILD="n"
        shift
    elif [ "x$1" = "x--no-image" ]; then
        HAVE_IMAGE="n"
        shift
    elif [ "x$1" = "x--secondary" ]; then
        SECONDARY_DEX=":$DEX_LOCATION/$TEST_NAME-ex.jar"
        # Enable cfg-append to make sure we get the dump for both dex files.
        # (otherwise the runtime compilation of the secondary dex will overwrite
        # the dump of the first one)
        FLAGS="${FLAGS} -Xcompiler-option --dump-cfg-append"
        COMPILE_FLAGS="${COMPILE_FLAGS} --dump-cfg-append"
        shift
    elif [ "x$1" = "x--debug" ]; then
        DEBUGGER="y"
        TIME_OUT="n"
        shift
    elif [ "x$1" = "x--gdb" ]; then
        USE_GDB="y"
        DEV_MODE="y"
        TIME_OUT="n"
        shift
    elif [ "x$1" = "x--gdb-arg" ]; then
        shift
        gdb_arg="$1"
        GDB_ARGS="${GDB_ARGS} $gdb_arg"
        shift
    elif [ "x$1" = "x--zygote" ]; then
        ZYGOTE="-Xzygote"
        msg "Spawning from zygote"
        shift
    elif [ "x$1" = "x--dev" ]; then
        DEV_MODE="y"
        shift
    elif [ "x$1" = "x--interpreter" ]; then
        INTERPRETER="y"
        shift
    elif [ "x$1" = "x--jit" ]; then
        JIT="y"
        shift
    elif [ "x$1" = "x--jvm" ]; then
        USE_JVM="y"
        shift
    elif [ "x$1" = "x--invoke-with" ]; then
        shift
        if [ "x$1" = "x" ]; then
            echo "$0 missing argument to --invoke-with" 1>&2
            exit 1
        fi
        if [ "x$INVOKE_WITH" = "x" ]; then
            INVOKE_WITH="$1"
        else
            INVOKE_WITH="$INVOKE_WITH $1"
        fi
        shift
    elif [ "x$1" = "x--no-verify" ]; then
        VERIFY="n"
        shift
    elif [ "x$1" = "x--verify-soft-fail" ]; then
        VERIFY="s"
        shift
    elif [ "x$1" = "x--no-optimize" ]; then
        OPTIMIZE="n"
        shift
    elif [ "x$1" = "x--android-root" ]; then
        shift
        ANDROID_ROOT="$1"
        shift
    elif [ "x$1" = "x--instruction-set-features" ]; then
        shift
        INSTRUCTION_SET_FEATURES="$1"
        shift
    elif [ "x$1" = "x--timeout" ]; then
        shift
        TIME_OUT_VALUE="$1"
        shift
    elif [ "x$1" = "x--" ]; then
        shift
        break
    elif [ "x$1" = "x--64" ]; then
        ISA="x86_64"
        GDB_SERVER="gdbserver64"
        DALVIKVM="dalvikvm64"
        LIBRARY_DIRECTORY="lib64"
        ARCHITECTURES_PATTERN="${ARCHITECTURES_64}"
        shift
    elif [ "x$1" = "x--pic-test" ]; then
        FLAGS="${FLAGS} -Xcompiler-option --compile-pic"
        COMPILE_FLAGS="${COMPILE_FLAGS} --compile-pic"
        shift
    elif [ "x$1" = "x--experimental" ]; then
        if [ "$#" -lt 2 ]; then
            echo "missing --experimental option" 1>&2
            exit 1
        fi
        EXPERIMENTAL="$EXPERIMENTAL $2"
        shift 2
    elif expr "x$1" : "x--" >/dev/null 2>&1; then
        echo "unknown $0 option: $1" 1>&2
        exit 1
    else
        break
    fi
done

if [ "$USE_JVM" = "n" ]; then
    for feature in ${EXPERIMENTAL}; do
        FLAGS="${FLAGS} -Xexperimental:${feature} -Xcompiler-option --runtime-arg -Xcompiler-option -Xexperimental:${feature}"
        COMPILE_FLAGS="${COMPILE_FLAGS} --runtime-arg -Xexperimental:${feature}"
    done
fi

if [ "x$1" = "x" ] ; then
  MAIN="Main"
else
  MAIN="$1"
  shift
fi

if [ "$ZYGOTE" = "" ]; then
    if [ "$OPTIMIZE" = "y" ]; then
        if [ "$VERIFY" = "y" ]; then
            DEX_OPTIMIZE="-Xdexopt:verified"
        else
            DEX_OPTIMIZE="-Xdexopt:all"
        fi
        msg "Performing optimizations"
    else
        DEX_OPTIMIZE="-Xdexopt:none"
        msg "Skipping optimizations"
    fi

    if [ "$VERIFY" = "y" ]; then
        JVM_VERIFY_ARG="-Xverify:all"
        msg "Performing verification"
    elif [ "$VERIFY" = "s" ]; then
        JVM_VERIFY_ARG="Xverify:all"
        DEX_VERIFY="-Xverify:softfail"
        msg "Forcing verification to be soft fail"
    else # VERIFY = "n"
        DEX_VERIFY="-Xverify:none"
        JVM_VERIFY_ARG="-Xverify:none"
        msg "Skipping verification"
    fi
fi

msg "------------------------------"

if [ "$DEBUGGER" = "y" ]; then
  # Use this instead for ddms and connect by running 'ddms':
  # DEBUGGER_OPTS="-agentlib:jdwp=transport=dt_android_adb,server=y,suspend=y"
  # TODO: add a separate --ddms option?

  PORT=12345
  msg "Waiting for jdb to connect:"
  if [ "$HOST" = "n" ]; then
    msg "    adb forward tcp:$PORT tcp:$PORT"
  fi
  msg "    jdb -attach localhost:$PORT"
  DEBUGGER_OPTS="-agentlib:jdwp=transport=dt_socket,address=$PORT,server=y,suspend=y"
fi

if [ "$USE_JVM" = "y" ]; then
  # Xmx is necessary since we don't pass down the ART flags to JVM.
  cmdline="${JAVA} ${DEBUGGER_OPTS} ${JVM_VERIFY_ARG} -Xmx256m -classpath classes ${FLAGS} $MAIN $@"
  if [ "$DEV_MODE" = "y" ]; then
    echo $cmdline
  fi
  $cmdline
  exit
fi


if [ "$HAVE_IMAGE" = "n" ]; then
    DALVIKVM_BOOT_OPT="-Ximage:/system/non-existant/core.art"
else
    DALVIKVM_BOOT_OPT="-Ximage:${BOOT_IMAGE}"
fi


if [ "$USE_GDB" = "y" ]; then
  if [ "$HOST" = "n" ]; then
    GDB="$GDB_SERVER :5039"
  else
    if [ `uname` = "Darwin" ]; then
        GDB=lldb
        GDB_ARGS="$GDB_ARGS -- $DALVIKVM"
        DALVIKVM=
    else
        GDB=gdb
        GDB_ARGS="$GDB_ARGS --args $DALVIKVM"
        # Enable for Emacs "M-x gdb" support. TODO: allow extra gdb arguments on command line.
        # gdbargs="--annotate=3 $gdbargs"
    fi
  fi
fi

if [ "$INTERPRETER" = "y" ]; then
    INT_OPTS="-Xint"
    if [ "$VERIFY" = "y" ] ; then
      INT_OPTS="${INT_OPTS} -Xcompiler-option --compiler-filter=interpret-only"
      COMPILE_FLAGS="${COMPILE_FLAGS} --compiler-filter=interpret-only"
    elif [ "$VERIFY" = "s" ]; then
      INT_OPTS="${INT_OPTS} -Xcompiler-option --compiler-filter=verify-at-runtime"
      COMPILE_FLAGS="${COMPILE_FLAGS} --compiler-filter=verify-at-runtime"
      DEX_VERIFY="${DEX_VERIFY} -Xverify:softfail"
    else # VERIFY = "n"
      INT_OPTS="${INT_OPTS} -Xcompiler-option --compiler-filter=verify-none"
      COMPILE_FLAGS="${COMPILE_FLAGS} --compiler-filter=verify-none"
      DEX_VERIFY="${DEX_VERIFY} -Xverify:none"
    fi
fi

if [ "$JIT" = "y" ]; then
    INT_OPTS="-Xusejit:true"
    if [ "$VERIFY" = "y" ] ; then
      INT_OPTS="${INT_OPTS} -Xcompiler-option --compiler-filter=verify-at-runtime"
      COMPILE_FLAGS="${COMPILE_FLAGS} --compiler-filter=verify-at-runtime"
    else
      INT_OPTS="${INT_OPTS} -Xcompiler-option --compiler-filter=verify-none"
      COMPILE_FLAGS="${COMPILE_FLAGS} --compiler-filter=verify-none"
      DEX_VERIFY="${DEX_VERIFY} -Xverify:none"
    fi
fi

JNI_OPTS="-Xjnigreflimit:512 -Xcheck:jni"

if [ "$RELOCATE" = "y" ]; then
    COMPILE_FLAGS="${COMPILE_FLAGS} --include-patch-information --runtime-arg -Xnorelocate"
    FLAGS="${FLAGS} -Xrelocate -Xcompiler-option --include-patch-information"
    if [ "$HOST" = "y" ]; then
        # Run test sets a fairly draconian ulimit that we will likely blow right over
        # since we are relocating. Get the total size of the /system/framework directory
        # in 512 byte blocks and set it as the ulimit. This should be more than enough
        # room.
        if [ ! `uname` = "Darwin" ]; then  # TODO: Darwin doesn't support "du -B..."
          ulimit -S $(du -c -B512 ${ANDROID_HOST_OUT}/framework 2>/dev/null | tail -1 | cut -f1) || exit 1
        fi
    fi
else
    FLAGS="$FLAGS -Xnorelocate"
    COMPILE_FLAGS="${COMPILE_FLAGS} --runtime-arg -Xnorelocate"
    if [ "$HOST" = "y" ]; then
        # Increase ulimit to 64MB in case we are running hprof test.
        ulimit -S 64000 || exit 1
    fi
fi

if [ "$HOST" = "n" ]; then
  ISA=$(adb shell ls -F /data/dalvik-cache | grep -Ewo "${ARCHITECTURES_PATTERN}")
  if [ x"$ISA" = "x" ]; then
    echo "Unable to determine architecture"
    exit 1
  fi
fi

dex2oat_cmdline="true"
mkdir_cmdline="mkdir -p ${DEX_LOCATION}/dalvik-cache/$ISA"
strip_cmdline="true"

# Pick a base that will force the app image to get relocated.
app_image="--base=0x4000 --app-image-file=$DEX_LOCATION/oat/$ISA/$TEST_NAME.art"

if [ "$PREBUILD" = "y" ]; then
  mkdir_cmdline="${mkdir_cmdline} && mkdir -p ${DEX_LOCATION}/oat/$ISA"
  dex2oat_cmdline="$INVOKE_WITH $ANDROID_ROOT/bin/dex2oatd \
                      $COMPILE_FLAGS \
                      --boot-image=${BOOT_IMAGE} \
                      --dex-file=$DEX_LOCATION/$TEST_NAME.jar \
                      --oat-file=$DEX_LOCATION/oat/$ISA/$TEST_NAME.odex \
                      ${app_image} \
                      --instruction-set=$ISA"
  if [ "x$INSTRUCTION_SET_FEATURES" != "x" ] ; then
    dex2oat_cmdline="${dex2oat_cmdline} --instruction-set-features=${INSTRUCTION_SET_FEATURES}"
  fi

  # Add in a timeout. This is important for testing the compilation/verification time of
  # pathological cases.
  # Note: as we don't know how decent targets are (e.g., emulator), only do this on the host for
  #       now. We should try to improve this.
  #       The current value is rather arbitrary. run-tests should compile quickly.
  if [ "$HOST" != "n" ]; then
    # Use SIGRTMIN+2 to try to dump threads.
    # Use -k 1m to SIGKILL it a minute later if it hasn't ended.
    dex2oat_cmdline="timeout -k 1m -s SIGRTMIN+2 1m ${dex2oat_cmdline}"
  fi
fi

if [ "$STRIP_DEX" = "y" ]; then
  strip_cmdline="zip --quiet --delete $DEX_LOCATION/$TEST_NAME.jar classes.dex"
fi

DALVIKVM_ISA_FEATURES_ARGS=""
if [ "x$INSTRUCTION_SET_FEATURES" != "x" ] ; then
  DALVIKVM_ISA_FEATURES_ARGS="-Xcompiler-option --instruction-set-features=${INSTRUCTION_SET_FEATURES}"
fi

# java.io.tmpdir can only be set at launch time.
TMP_DIR_OPTION=""
if [ "$HOST" = "n" ]; then
  TMP_DIR_OPTION="-Djava.io.tmpdir=/data/local/tmp"
fi

# We set DumpNativeStackOnSigQuit to false to avoid stressing libunwind.
# b/27185632
# b/24664297
dalvikvm_cmdline="$INVOKE_WITH $GDB $ANDROID_ROOT/bin/$DALVIKVM \
                  $GDB_ARGS \
                  $FLAGS \
                  $DEX_VERIFY \
                  -XXlib:$LIB \
                  $PATCHOAT \
                  $DEX2OAT \
                  $DALVIKVM_ISA_FEATURES_ARGS \
                  $ZYGOTE \
                  $JNI_OPTS \
                  $INT_OPTS \
                  $DEBUGGER_OPTS \
                  $DALVIKVM_BOOT_OPT \
                  $TMP_DIR_OPTION \
                  -XX:DumpNativeStackOnSigQuit:false \
                  -cp $DEX_LOCATION/$TEST_NAME.jar$SECONDARY_DEX $MAIN $ARGS"

# Remove whitespace.
dex2oat_cmdline=$(echo $dex2oat_cmdline)
dalvikvm_cmdline=$(echo $dalvikvm_cmdline)

if [ "$HOST" = "n" ]; then
    adb root > /dev/null
    adb wait-for-device
    if [ "$QUIET" = "n" ]; then
      adb shell rm -r $DEX_LOCATION
      adb shell mkdir -p $DEX_LOCATION
      adb push $TEST_NAME.jar $DEX_LOCATION
      adb push $TEST_NAME-ex.jar $DEX_LOCATION
    else
      adb shell rm -r $DEX_LOCATION >/dev/null 2>&1
      adb shell mkdir -p $DEX_LOCATION >/dev/null 2>&1
      adb push $TEST_NAME.jar $DEX_LOCATION >/dev/null 2>&1
      adb push $TEST_NAME-ex.jar $DEX_LOCATION >/dev/null 2>&1
    fi

    LD_LIBRARY_PATH=
    if [ "$ANDROID_ROOT" != "/system" ]; then
      # Current default installation is dalvikvm 64bits and dex2oat 32bits,
      # so we can only use LD_LIBRARY_PATH when testing on a local
      # installation.
      LD_LIBRARY_PATH=$ANDROID_ROOT/$LIBRARY_DIRECTORY
    fi

    PUBLIC_LIBS=libart.so:libartd.so

    # Create a script with the command. The command can get longer than the longest
    # allowed adb command and there is no way to get the exit status from a adb shell
    # command.
    cmdline="cd $DEX_LOCATION && \
             export ANDROID_DATA=$DEX_LOCATION && \
             export ANDROID_ADDITIONAL_PUBLIC_LIBRARIES=$PUBLIC_LIBS && \
             export DEX_LOCATION=$DEX_LOCATION && \
             export ANDROID_ROOT=$ANDROID_ROOT && \
             $mkdir_cmdline && \
             export LD_LIBRARY_PATH=$LD_LIBRARY_PATH && \
             export PATH=$ANDROID_ROOT/bin:$PATH && \
             $dex2oat_cmdline && \
             $strip_cmdline && \
             $dalvikvm_cmdline"

    cmdfile=$(tempfile -p "cmd-" -s "-$TEST_NAME")
    echo "$cmdline" > $cmdfile

    if [ "$DEV_MODE" = "y" ]; then
      echo $cmdline
    fi

    if [ "$QUIET" = "n" ]; then
      adb push $cmdfile $DEX_LOCATION/cmdline.sh
    else
      adb push $cmdfile $DEX_LOCATION/cmdline.sh > /dev/null 2>&1
    fi

    adb shell sh $DEX_LOCATION/cmdline.sh

    rm -f $cmdfile
else
    export ANDROID_PRINTF_LOG=brief

    # By default, and for prebuild dex2oat, we are interested in errors being logged. In dev mode
    # we want debug messages.
    if [ "$DEV_MODE" = "y" ]; then
        export ANDROID_LOG_TAGS='*:d'
    else
        export ANDROID_LOG_TAGS='*:e'
    fi

    export ANDROID_DATA="$DEX_LOCATION"
    export ANDROID_ROOT="${ANDROID_ROOT}"
    export LD_LIBRARY_PATH="${ANDROID_ROOT}/lib"
    export DYLD_LIBRARY_PATH="${ANDROID_ROOT}/lib"
    export PATH="$PATH:${ANDROID_ROOT}/bin"

    # Temporarily disable address space layout randomization (ASLR).
    # This is needed on the host so that the linker loads core.oat at the necessary address.
    export LD_USE_LOAD_BIAS=1

    cmdline="$dalvikvm_cmdline"

    if [ "$TIME_OUT" = "gdb" ]; then
      if [ `uname` = "Darwin" ]; then
        # Fall back to timeout on Mac.
        TIME_OUT="timeout"
      elif [ "$ISA" = "x86" ]; then
        # prctl call may fail in 32-bit on an older (3.2) 64-bit Linux kernel. Fall back to timeout.
        TIME_OUT="timeout"
      else
        # Check if gdb is available.
        gdb --eval-command="quit" > /dev/null 2>&1
        if [ $? != 0 ]; then
          # gdb isn't available. Fall back to timeout.
          TIME_OUT="timeout"
        fi
      fi
    fi

    if [ "$TIME_OUT" = "timeout" ]; then
      # Add timeout command if time out is desired.
      #
      # Note: We use nested timeouts. The inner timeout sends SIGRTMIN+2 (usually 36) to ART, which
      #       will induce a full thread dump before abort. However, dumping threads might deadlock,
      #       so the outer timeout sends the regular SIGTERM after an additional minute to ensure
      #       termination (without dumping all threads).
      TIME_PLUS_ONE=$(($TIME_OUT_VALUE + 60))
      cmdline="timeout ${TIME_PLUS_ONE}s timeout -s SIGRTMIN+2 ${TIME_OUT_VALUE}s $cmdline"
    fi

    if [ "$DEV_MODE" = "y" ]; then
      echo "$mkdir_cmdline && $dex2oat_cmdline && $strip_cmdline && $cmdline"
    fi

    cd $ANDROID_BUILD_TOP

    rm -rf ${DEX_LOCATION}/dalvik-cache/
    $mkdir_cmdline || exit 1
    $dex2oat_cmdline || { echo "Dex2oat failed." >&2 ; exit 2; }
    $strip_cmdline || { echo "Strip failed." >&2 ; exit 3; }

    # For running, we must turn off logging when dex2oat or patchoat are missing. Otherwise we use
    # the same defaults as for prebuilt: everything when --dev, otherwise errors and above only.
    if [ "$DEV_MODE" = "y" ]; then
        export ANDROID_LOG_TAGS='*:d'
    elif [ "$USE_DEX2OAT_AND_PATCHOAT" = "n" ]; then
        # All tests would log the error of failing dex2oat/patchoat. Be silent here and only
        # log fatal events.
        export ANDROID_LOG_TAGS='*:s'
    else
        # We are interested in LOG(ERROR) output.
        export ANDROID_LOG_TAGS='*:e'
    fi

    if [ "$USE_GDB" = "y" ]; then
      # When running under gdb, we cannot do piping and grepping...
      $cmdline "$@"
    else
      if [ "$TIME_OUT" != "gdb" ]; then
        trap 'kill -INT -$pid' INT
        $cmdline "$@" 2>&1 & pid=$!
        wait $pid
        # Add extra detail if time out is enabled.
        if [ ${PIPESTATUS[0]} = 124 ] && [ "$TIME_OUT" = "timeout" ]; then
          echo -e "\e[91mTEST TIMED OUT!\e[0m" >&2
        fi
      else
        # With a thread dump that uses gdb if a timeout.
        trap 'kill -INT -$pid' INT
        $cmdline "$@" 2>&1 & pid=$!
        # Spawn a watcher process.
        ( sleep $TIME_OUT_VALUE && \
          echo "##### Thread dump using gdb on test timeout" && \
          ( gdb -q -p $pid --eval-command="info thread" --eval-command="thread apply all bt" \
                           --eval-command="call exit(124)" --eval-command=quit || \
            kill $pid )) 2> /dev/null & watcher=$!
        wait $pid
        test_exit_status=$?
        pkill -P $watcher 2> /dev/null # kill the sleep which will in turn end the watcher as well
        if [ $test_exit_status = 0 ]; then
          # The test finished normally.
          exit 0
        else
          # The test failed or timed out.
          if [ $test_exit_status = 124 ]; then
            # The test timed out.
            echo -e "\e[91mTEST TIMED OUT!\e[0m" >&2
          fi
        fi
      fi
    fi
fi