# Copyright (C) 2011 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# This script is used on host and device. It uses a common subset
# shell dialect that should work on the host (e.g. bash), and
# Android (e.g. mksh).

######################################
# Functions
######################################
function find_libdir() {
  # Get the actual file, $1 is the ART_BINARY_PATH and may be a symbolic link.
  # Use realpath instead of readlink because Android does not have a readlink.
  if [[ "$(realpath "$1")" == *dalvikvm64 ]]; then
    echo "lib64"
  else
    echo "lib"
  fi
}

function usage() {
  cat 1>&2 <<EOF
Usage: art [OPTIONS] [--] [ART_OPTIONS] CLASS

Supported OPTIONS include:
  --32                     Use the 32-bit Android Runtime.
  --64                     Use the 64-bit Android Runtime.
  -d                       Use the debug ART library (libartd.so).
  --debug                  Equivalent to -d.
  --gdb                    Launch the Android Runtime in gdb.
  --gdbserver <comms>      Launch the Android Runtime in gdbserver using the
                           supplied communication channel.
  --help                   Display usage message.
  --invoke-with <program>  Launch the Android Runtime in <program>.
  --perf                   Launch the Android Runtime with perf recording.
  --perf-report            Launch the Android Runtime with perf recording with
                           report upon completion.
  --profile                Run with profiling, then run using profile data.
  --verbose                Run script verbosely.
  --no-clean               Don't cleanup oat directories.
  --no-compile             Don't invoke dex2oat before running.
  --allow-default-jdwp     Don't automatically put in -XjdwpProvider:none.
                           You probably do not want this.

The ART_OPTIONS are passed directly to the Android Runtime.

Example:
  art --32 -cp my_classes.dex MainClass

Common errors:
  1) Not having core.art available (see $ANDROID_BUILD_TOP/art/Android.mk).
     eg m -j32 build-art-host
  2) Not having boot.art available (see $ANDROID_BUILD_TOP/build/make/core/dex_preopt_libart_boot.mk)
     eg m -j32 out/target/product/generic_x86_64/dex_bootjars/system/framework/x86_64/boot.art
EOF
}

function clean_android_data() {
  if [ "$DELETE_ANDROID_DATA" = "yes" ]; then
    rm -rf $ANDROID_DATA
  fi
}

# Given 'VAR1=VAL VAR2=VAL2 ... cmd arg1 arg2 ... argN' run the 'cmd' with the args
# with the modified environment {VAR1=VAL,VAL2=,...}.
#
# Also prints the command to be run if verbose mode is enabled.
function verbose_run() {
  if [ "$VERBOSE" = "yes" ]; then
    echo "$@"
  fi

  env "$@"
}

# Parse a colon-separated list into an array (e.g. "foo.dex:bar.dex" -> (foo.dex bar.dex))
PARSE_CLASSPATH_RESULT=()  # Return value will be here due to shell limitations.
parse_classpath() {
  local cp="$1"
  local oldifs=$IFS

  local cp_array
  cp_array=()

  IFS=":"
  for part in $cp; do
    cp_array+=("$part")
  done
  IFS=$oldifs

  PARSE_CLASSPATH_RESULT=("${cp_array[@]}")
}

# Sets 'PARSE_CLASSPATH_RESULT' to an array of class path dex files.
# e.g. (-cp foo/classes.dex:bar/classes.dex) -> (foo/classes.dex bar/classes.dex)
find_cp_in_args() {
  local found="false"
  local index=0
  local what

  while [[ $# -gt 0 ]]; do
    case "$1" in
      -cp|-classpath)
        parse_classpath "$2"
        # Sets 'PARSE_CLASSPATH_RESULT' to an array of class path dex files.
        # Subsequent parses will overwrite the preceding.
        shift
        ;;
    esac
    shift
  done
}

# Delete the 'oat' directories relative to the classpath's dex files.
# e.g. (foo/classes.dex bar/classes.dex) would delete (foo/oat bar/oat) directories.
cleanup_oat_directory() {
  local classpath
  classpath=("$@")

  local dirpath

  for path in "${classpath[@]}"; do
    dirpath="$(dirname "$path")"
    [[ -d "$dirpath" ]] && verbose_run rm -rf "$dirpath/oat"
  done
}

# Parse -cp <CP>, -classpath <CP>, and $CLASSPATH to find the dex files.
# Each dex file's directory will have an 'oat' file directory, delete it.
# Input: Command line arguments to the art script.
# e.g. -cp foo/classes.dex:bar/classes.dex would delete (foo/oat bar/oat) directories.
cleanup_oat_directory_for_classpath() {
  if [ "$CLEAN_OAT_FILES" = "yes" ]; then
    # First try: Use $CLASSPATH environment variable.
    parse_classpath "$CLASSPATH"
    # Second try: Look for latest -cp or -classpath arg which will take precedence.
    find_cp_in_args "$@"

    cleanup_oat_directory "${PARSE_CLASSPATH_RESULT[@]}"
  fi
}

# Attempt to find $ANDROID_ROOT/framework/<isa>/core.art' without knowing what <isa> is.
function check_if_boot_image_file_exists() {
  local image_location_dir="$1"
  local image_location_name="$2"

  # Expand image_files to a list of existing image files on the disk.
  # If no such files exist, it expands to single element 'dir/*/file' with a literal '*'.
  local image_files
  image_files=("$image_location_dir"/*/"$image_location_name") # avoid treating "*" as literal.

  # Array always has at least 1 element. Test explicitly whether the file exists.
  [[ -e "${image_files[0]}" ]]
}

# Automatically find the boot image location. It uses core.art by default.
# On a real device, it might only have a boot.art, so use that instead when core.art does not exist.
function detect_boot_image_location() {
  local image_location_dir="$ANDROID_ROOT/framework"
  local image_location_name="core.art"

  # If there are no existing core.art, try to find boot.art.
  # If there is no boot.art then leave it as-is, assumes -Ximage is explicitly used.
  # Otherwise let dalvikvm give the error message about an invalid image file.
  if ! check_if_boot_image_file_exists "$image_location_dir" "core.art" && \
       check_if_boot_image_file_exists "$image_location_dir" "boot.art"; then
    image_location_name="boot.art"
  fi

  local image_location="$image_location_dir/$image_location_name"
  echo "$image_location"
}

function run_dex2oat() {
  local class_loader_context=
  for dex_file in "${DEX2OAT_CLASSPATH[@]}"
  do
    while [ -h "$dex_file" ]; do
      # On Mac OS, readlink -f doesn't work.
      dex_file="$(readlink "$dex_file")"
    done
    # Create oat file directory.
    verbose_run mkdir -p $(dirname "$dex_file")/oat/$ISA
    local oat_file=$(basename "$dex_file")
    local oat_file=$(dirname "$dex_file")/oat/$ISA/${oat_file%.*}.odex
    # When running dex2oat use the exact same context as when running dalvikvm.
    # (see run_art function)
    verbose_run ANDROID_DATA=$ANDROID_DATA                    \
          ANDROID_ROOT=$ANDROID_ROOT                          \
          ANDROID_RUNTIME_ROOT=$ANDROID_RUNTIME_ROOT          \
          ANDROID_TZDATA_ROOT=$ANDROID_TZDATA_ROOT            \
          LD_LIBRARY_PATH=$LD_LIBRARY_PATH                    \
          PATH=$ANDROID_ROOT/bin:$PATH                        \
          LD_USE_LOAD_BIAS=1                                  \
          ANDROID_LOG_TAGS=$ANDROID_LOG_TAGS                  \
          $DEX2OAT_BINARY_PATH                                \
          --runtime-arg -Xnorelocate                          \
          --boot-image=$DEX2OAT_BOOT_IMAGE                    \
          --instruction-set=$ISA                              \
          --class-loader-context="PCL[$class_loader_context]" \
          "${DEX2OAT_FLAGS[@]}"                               \
          --dex-file=$dex_file                                \
          --oat-file=$oat_file
    if [[ -n $class_loader_context ]]; then
      class_loader_context+=":"
    fi
    class_loader_context+="$dex_file"
  done
}

# Extract the dex2oat flags from the list of arguments.
# -Xcompiler-options arguments are stored in DEX2OAT_FLAGS array
# -cp argument is split by ':' and stored in DEX2OAT_CLASSPATH
# -Ximage argument is stored in DEX2OAT_BOOT_IMAGE
# -Xbootclasspath argument is stored in DEX2OAT_BCP
# -Xbootclasspath-locations argument is stored in DEX2OAT_BCP_LOCS
function extract_dex2oat_flags() {
  while [ $# -gt 0 ]; do
    case $1 in
      -Xcompiler-option)
        DEX2OAT_FLAGS+=("$2")
        shift
        ;;
      -Ximage:*)
        DEX2OAT_BOOT_IMAGE=$1
        # Remove '-Ximage:' from the argument.
        DEX2OAT_BOOT_IMAGE=${DEX2OAT_BOOT_IMAGE##-Ximage:}
        ;;
      -Xbootclasspath:*)
        DEX2OAT_BCP=$1
        # Remove '-Xbootclasspath:' from the argument.
        DEX2OAT_BCP=${DEX2OAT_BCP##-Xbootclasspath:}
        ;;
      -Xbootclasspath-locations:*)
        DEX2OAT_BCP_LOCS=$1
        # Remove '-Xbootclasspath-locations:' from the argument.
        DEX2OAT_BCP_LOCS=${DEX2OAT_BCP_LOCS##-Xbootclasspath-locations:}
        ;;
      -cp)
        # Reset any previously parsed classpath, just like dalvikvm
        # only supports one -cp argument.
        DEX2OAT_CLASSPATH=()
        # TODO: support -classpath and CLASSPATH
        local oifs=$IFS
        IFS=':'
        for classpath_elem in $2
        do
          DEX2OAT_CLASSPATH+=("$classpath_elem")
        done
        shift
        IFS=$oifs
        ;;
    esac
    shift
  done
}

# Runs dalvikvm, returns its exit code.
# (Oat directories are cleaned up in between runs)
function run_art() {
  local ret

  # Run dalvikvm.
  verbose_run ANDROID_DATA="$ANDROID_DATA"                  \
              ANDROID_ROOT="$ANDROID_ROOT"                  \
              ANDROID_RUNTIME_ROOT="$ANDROID_RUNTIME_ROOT"  \
              ANDROID_TZDATA_ROOT="$ANDROID_TZDATA_ROOT"    \
              LD_LIBRARY_PATH="$LD_LIBRARY_PATH"            \
              PATH="$ANDROID_ROOT/bin:$PATH"                \
              LD_USE_LOAD_BIAS=1                            \
              ANDROID_LOG_TAGS="$ANDROID_LOG_TAGS"          \
              $LAUNCH_WRAPPER $ART_BINARY_PATH $lib         \
              -XXlib:"$LIBART"                              \
              -Xnorelocate                                  \
              -Ximage:"$DEFAULT_IMAGE_LOCATION"             \
              "$@"
  ret=$?

  # Avoid polluting disk with 'oat' files after dalvikvm has finished.
  cleanup_oat_directory_for_classpath "$@"

  # Forward exit code of dalvikvm.
  return $ret
}

######################################
# Globals
######################################
ART_BINARY=dalvikvm
DEX2OAT_BINARY=dex2oat
DELETE_ANDROID_DATA="no"
LAUNCH_WRAPPER=
LIBART=libart.so
JIT_PROFILE="no"
ALLOW_DEFAULT_JDWP="no"
VERBOSE="no"
CLEAN_OAT_FILES="yes"
RUN_DEX2OAT="yes"
EXTRA_OPTIONS=()
DEX2OAT_FLAGS=()
DEX2OAT_CLASSPATH=()

# Parse arguments
while [[ "$1" = "-"* ]]; do
  case "$1" in
  --)
    # No more arguments for this script.
    shift
    break
    ;;
  --32)
    ART_BINARY=dalvikvm32
    ;;
  --64)
    ART_BINARY=dalvikvm64
    ;;
  -d)
    ;& # Fallthrough
  --debug)
    LIBART="libartd.so"
    DEX2OAT_BINARY=dex2oatd
    # Expect that debug mode wants all checks.
    EXTRA_OPTIONS+=(-XX:SlowDebug=true)
    ;;
  --gdbserver)
    LAUNCH_WRAPPER="gdbserver $2"
    shift
    ;;
  --gdb)
    LIBART="libartd.so"
    LAUNCH_WRAPPER="gdb --args"
    ;;
  --help)
    usage
    exit 0
    ;;
  --invoke-with)
    LAUNCH_WRAPPER=$2
    shift
    ;;
  --perf)
    PERF="record"
    ;;
  --perf-report)
    PERF="report"
    ;;
  --profile)
    JIT_PROFILE="yes"
    ;;
  --verbose)
    VERBOSE="yes"
    ;;
  --no-clean)
    CLEAN_OAT_FILES="no"
    ;;
  --no-compile)
    CLEAN_OAT_FILES="no"
    RUN_DEX2OAT="no"
    ;;
  --allow-default-jdwp)
    ALLOW_DEFAULT_JDWP="yes"
    ;;
  --*)
    echo "unknown option: $1" 1>&2
    usage
    exit 1
    ;;
  *)
    break
    ;;
  esac
  shift
done

if [ $# -eq 0 ]; then
  usage
  exit 1
fi

# Follow all sym links to get the program name.
if [[ -n "$BASH_SOURCE" ]]; then
  PROG_NAME="$BASH_SOURCE"
else
  PROG_NAME="$0"
fi
while [ -h "$PROG_NAME" ]; do
  # On Mac OS, readlink -f doesn't work.
  PROG_NAME="$(readlink "$PROG_NAME")"
done

PROG_DIR="$(cd "${PROG_NAME%/*}" ; pwd -P)"
ANDROID_ROOT="$(cd $PROG_DIR/..; pwd -P)"

# If ANDROID_RUNTIME_ROOT is not set, try to detect whether we are running on
# target or host and set that environment variable to the usual default value.
if [ -z "$ANDROID_RUNTIME_ROOT" ]; then
  # This script is used on host and target (device). However, the (expected)
  # default value `ANDROID_RUNTIME_ROOT` is not the same on host and target:
  # - on host, `ANDROID_RUNTIME_ROOT` is expected to be "$ANDROID_ROOT/com.android.apex";
  # - on target, `ANDROID_RUNTIME_ROOT` is expected to be "$ANDROID_ROOT/../apex/com.android.apex".
  #
  # We use the presence/absence of the `$ANDROID_ROOT/../apex` directory to
  # determine whether we are on target or host (this is brittle, but simple).
  if [ -d "$ANDROID_ROOT/../apex" ]; then
    # Target case.
    #
    # We should be setting `ANDROID_RUNTIME_ROOT` to
    # "$ANDROID_ROOT/../apex/com.android.runtime" here. However, the Runtime APEX
    # is not (yet) supported by the ART Buildbot setup (see b/121117762); and yet
    # ICU code depends on `ANDROID_RUNTIME_ROOT` to find ICU .dat files.
    #
    # As a temporary workaround, we:
    # - make the ART Buildbot build script (art/tools/buildbot-build.sh) also
    #   generate the ICU .dat files in `/system/etc/icu` on device (these files
    #   are normally only put in the Runtime APEX on device);
    # - set `ANDROID_RUNTIME_ROOT` to `$ANDROID_ROOT` (i.e. "/system") here.
    #
    # TODO(b/121117762): Set `ANDROID_RUNTIME_ROOT` to
    # "$ANDROID_ROOT/../apex/com.android.runtime" when the Runtime APEX is fully
    # supported on the ART Buildbot and Golem.
    ANDROID_RUNTIME_ROOT=$ANDROID_ROOT
  else
    # Host case.
    ANDROID_RUNTIME_ROOT="$ANDROID_ROOT/com.android.runtime"
  fi
fi

# If ANDROID_TZDATA_ROOT is not set point it to somewhere safe. Android code
# currently treats the module as optional so it does not require the path exists.
if [ -z "$ANDROID_TZDATA_ROOT" ]; then
  # Safe stubbed location that we don't need to exist.
  ANDROID_TZDATA_ROOT="$ANDROID_ROOT/com.android.tzdata_doesnotexist"
fi

ART_BINARY_PATH=$ANDROID_ROOT/bin/$ART_BINARY

if [ ! -x "$ART_BINARY_PATH" ]; then
  cat 1>&2 <<EOF
Android Runtime not found: $ART_BINARY_PATH
This script should be in the same directory as the Android Runtime ($ART_BINARY).
EOF
  exit 1
fi

DEX2OAT_BINARY_PATH=$ANDROID_ROOT/bin/$DEX2OAT_BINARY

if [ ! -x "$DEX2OAT_BINARY_PATH" ]; then
  echo "Warning: Android Compiler not found: $DEX2OAT_BINARY_PATH"
fi

######################################
# Main program
######################################

# If android logging is not explicitly set, only print warnings and errors.
if [ -z "$ANDROID_LOG_TAGS" ]; then
  ANDROID_LOG_TAGS='*:w'
fi

LIBDIR="$(find_libdir $ART_BINARY_PATH)"
LD_LIBRARY_PATH=$ANDROID_ROOT/$LIBDIR
DEFAULT_IMAGE_LOCATION="$(detect_boot_image_location)"
DEX2OAT_BOOT_IMAGE="$DEFAULT_IMAGE_LOCATION"
ISA=$(LD_LIBRARY_PATH=$LD_LIBRARY_PATH $ART_BINARY_PATH -showversion | (read art version number isa && echo $isa))

# Extract the dex2oat flags from the list of arguments.
# -Xcompiler-options arguments are stored in DEX2OAT_FLAGS array
# -cp argument is split by ':' and stored in DEX2OAT_CLASSPATH
# -Ximage argument is stored in DEX2OAT_BOOT_IMAGE
extract_dex2oat_flags "$@"

# If ANDROID_DATA is the system ANDROID_DATA or is not set, use our own,
# and ensure we delete it at the end.
if [ "$ANDROID_DATA" = "/data" ] || [ "$ANDROID_DATA" = "" ]; then
  if [[ $PWD != / ]]; then
    ANDROID_DATA="$PWD/android-data$$"
  else
    # Use /data/local/tmp when running this from adb shell, since it starts out in /
    # by default.
    ANDROID_DATA="$ANDROID_DATA/local/tmp/android-data$$"
  fi
  mkdir -p "$ANDROID_DATA"
  DELETE_ANDROID_DATA="yes"
fi

if [[ "$DEX2OAT_BCP" = "" && "$DEX2OAT_BCP_LOCS" != "" ]]; then
  echo "Cannot use -Xbootclasspath-locations without -Xbootclasspath"
  exit 1
fi

if [[ "$DEX2OAT_BOOT_IMAGE" = *core*.art && "$DEX2OAT_BCP" = "" ]]; then
  # Note: This must start with the CORE_IMG_JARS in Android.common_path.mk
  # because that's what we use for compiling the core.art image.
  # It may contain additional modules from TEST_CORE_JARS.
  core_jars_list="core-oj core-libart okhttp bouncycastle apache-xml conscrypt"
  core_jars_suffix=
  if [[ -e $ANDROID_ROOT/framework/core-oj-hostdex.jar ]]; then
    core_jars_suffix=-hostdex
    core_locations_dir=$ANDROID_ROOT/framework
    prefix=$PWD/
    if [[ ${core_locations_dir:0:${#prefix}} = $prefix ]]; then
      core_locations_dir="${core_locations_dir##$prefix}"
    fi
  elif [[ -e $ANDROID_ROOT/framework/core-oj-testdex.jar ]]; then
    core_jars_suffix=-testdex
    core_locations_dir=/system/framework
  fi
  if [[ $core_jars_suffix != "" ]]; then
    boot_separator=""
    for boot_module in ${core_jars_list}; do
      DEX_FILENAME="$boot_module$core_jars_suffix.jar"
      DEX2OAT_BCP+="$boot_separator$ANDROID_ROOT/framework/${DEX_FILENAME}"
      DEX2OAT_BCP_LOCS+="$boot_separator$core_locations_dir/${DEX_FILENAME}"
      boot_separator=":"
    done
    if [ "$VERBOSE" = "yes" ]; then
      echo "Using predefined -Xbootclasspath for image $DEX2OAT_BOOT_IMAGE:"
      echo DEX2OAT_BOOT_IMAGE=$DEX2OAT_BOOT_IMAGE
      echo DEX2OAT_BCP=$DEX2OAT_BCP
      echo DEX2OAT_BCP_LOCS=$DEX2OAT_BCP_LOCS
    fi
  fi
fi

if [ "$DEX2OAT_BCP" != "" ]; then
  EXTRA_OPTIONS+=("-Xbootclasspath:$DEX2OAT_BCP")
  DEX2OAT_FLAGS+=("--runtime-arg" "-Xbootclasspath:$DEX2OAT_BCP")
  if [ "$DEX2OAT_BCP_LOCS" != "" ]; then
    EXTRA_OPTIONS+=("-Xbootclasspath-locations:$DEX2OAT_BCP_LOCS")
    DEX2OAT_FLAGS+=("--runtime-arg" \
                    "-Xbootclasspath-locations:$DEX2OAT_BCP_LOCS")
  fi
fi

if [ "$PERF" != "" ]; then
  LAUNCH_WRAPPER="perf record -g --call-graph dwarf -F 10000 -o $ANDROID_DATA/perf.data -e cycles:u $LAUNCH_WRAPPER"
  DEX2OAT_FLAGS+=(--generate-debug-info)
fi

if [ "$ALLOW_DEFAULT_JDWP" = "no" ]; then
  EXTRA_OPTIONS+=(-XjdwpProvider:none)
fi

# First cleanup any left-over 'oat' files from the last time dalvikvm was run.
cleanup_oat_directory_for_classpath "$@"

# Protect additional arguments in quotes to preserve whitespaces (used by
# run-jdwp-test.sh when running on device), '$' (may be used as part of
# classpath) and other special characters when evaluated.
EXTRA_OPTIONS+=("$@")

if [ "$JIT_PROFILE" = "yes" ]; then
  # Create the profile. The runtime expects profiles to be created before
  # execution.
  PROFILE_PATH="$ANDROID_DATA/primary.prof"
  touch "$PROFILE_PATH"

  run_art -Xjitsaveprofilinginfo               \
          -Xps-min-methods-to-save:1           \
          -Xps-min-classes-to-save:1           \
          -Xps-min-notification-before-wake:10 \
          -Xps-profile-path:$PROFILE_PATH      \
          -Xusejit:true                        \
          ${EXTRA_OPTIONS[@]}                  \
          &> "$ANDROID_DATA/profile_gen.log"
  EXIT_STATUS=$?

  if [ $EXIT_STATUS != 0 ]; then
    echo "Profile run failed: " >&2
    cat "$ANDROID_DATA/profile_gen.log" >&2
    clean_android_data
    exit $EXIT_STATUS
  fi

  # Wipe dalvik-cache so that a subsequent run_art must regenerate it.
  # Leave $ANDROID_DATA intact since it contains our profile file.
  rm -rf "$ANDROID_DATA/dalvik-cache"

  # Append arguments so next invocation of run_art uses the profile.
  DEX2OAT_FLAGS+=(--profile-file="$PROFILE_PATH")
fi

if [ -x "$DEX2OAT_BINARY_PATH" ]; then
  if [ "$RUN_DEX2OAT" = "yes" ]; then
    # Run dex2oat before launching ART to generate the oat files for the classpath.
    run_dex2oat
  fi
fi

# Do not continue if the dex2oat failed.
EXIT_STATUS=$?
if [ $EXIT_STATUS != 0 ]; then
  echo "Failed dex2oat invocation" >&2
  exit $EXIT_STATUS
fi

run_art "${EXTRA_OPTIONS[@]}"
EXIT_STATUS=$?

if [ "$PERF" != "" ]; then
  if [ "$PERF" = report ]; then
    perf report -i $ANDROID_DATA/perf.data
  fi
  echo "Perf data saved in: $ANDROID_DATA/perf.data"
else
  # Perf output is placed under $ANDROID_DATA so not cleaned when perf options used.
  clean_android_data
fi

exit $EXIT_STATUS