tools/generate-boot-image-profile.sh

#!/bin/bash
#
# Copyright (C) 2017 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 creates a boot image profile based on input profiles.
#

if [[ "$#" -lt 2 ]]; then
  echo "Usage $0 <output> <profman args> <profiles>+"
  echo "Also outputs <output>.txt and <output>.preloaded-classes"
  echo 'Example: generate-boot-image-profile.sh boot.prof --profman-arg --boot-image-sampled-method-threshold=1 profiles/0/*/primary.prof'
  exit 1
fi

DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
TOP="$DIR/../.."
source "${TOP}/build/envsetup.sh" >&/dev/null # import get_build_var

OUT_PROFILE=$1
shift

# Read the profman args.
profman_args=()
while [[ "$#" -ge 2 ]] && [[ "$1" = '--profman-arg' ]]; do
  profman_args+=("$2")
  shift 2
done

# Remaining args are all the profiles.
for file in "$@"; do
  if [[ -s $file ]]; then
    profman_args+=("--profile-file=$file")
  fi
done

# Boot jars have hidden API access flags which do not pass dex file
# verification. Skip it.
jar_args=("--skip-apk-verification")
boot_jars=$("$ANDROID_BUILD_TOP"/art/tools/bootjars.sh --target)
jar_dir=$ANDROID_BUILD_TOP/$(get_build_var TARGET_OUT_JAVA_LIBRARIES)
for file in $boot_jars; do
  filename="$jar_dir/$file.jar"
  jar_args+=("--apk=$filename")
  jar_args+=("--dex-location=$filename")
done
profman_args+=("${jar_args[@]}")

# Generate the profile.
"$ANDROID_HOST_OUT/bin/profman" --generate-boot-image-profile "--reference-profile-file=$OUT_PROFILE" "${profman_args[@]}"

# Convert it to text.
echo Dumping profile to $OUT_PROFILE.txt
"$ANDROID_HOST_OUT/bin/profman" --dump-classes-and-methods "--profile-file=$OUT_PROFILE" "${jar_args[@]}" > "$OUT_PROFILE.txt"

# Generate preloaded classes
# Filter only classes by using grep -v
# Remove first and last characters L and ;
# Replace / with . to make dot format
grep -v "\\->" "$OUT_PROFILE.txt" | sed 's/.\(.*\)./\1/g' | tr "/" "." > "$OUT_PROFILE.preloaded-classes"

# You may need to filter some classes out since creating threads is not allowed in the zygote.
# i.e. using: grep -v -E '(android.net.ConnectivityThread\$Singleton)'