#!/bin/bash
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#
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# Copyright (C) 2017 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# Export some environment variables used by ART's Android.mk/Android.bp
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# build systems to configure ART [to use a different implementation].
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#
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# Currently only varies on ART_USE_READ_BARRIER for a concurrent/non-concurrent
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# flavor of the ART garbage collector.
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#
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# Only meant for golem use since when building ART directly, one can/should set
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# these environment flags themselves.
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#
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# These environment flags are not really meant here to be for "correctness",
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# but rather telling the ART C++ to use alternative algorithms.
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# In other words, the same exact binary build with a different "target"
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# should run in the same context (e.g. it does not change arch or the OS it's built for).
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#
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setenv() {
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local name="$1"
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local value="$2"
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export $name="$value"
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echo export $name="$value"
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}
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# Enforce specified target-name is one of these.
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# Perhaps we should be less strict?
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ALL_TARGETS=(art-interpreter art-opt art-jit art-jit-cc art-opt-cc art-opt-debuggable art-vdex)
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usage() {
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echo >&2 "Usage: $(basename $0) (--list-targets | <target-name>)"
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echo >&2
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echo >&2 "Exports the necessary ART environment variables"
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echo >&2 "to pass to the Golem build to correctly configure ART."
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echo >&2 "--------------------------------------------------------"
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echo >&2 "Required Arguments:"
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echo >&2 " <target-name> Specify the golem target to get environment variables for."
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echo >&2
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echo >&2 "Optional Flags":
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echo >&2 " --list-targets Display all the targets. Do not require the main target-name."
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echo >&2 " --help Print this help listing."
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echo >&2
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echo >&2 "Available Targets:"
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list_targets 2 " "
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}
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list_targets() {
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local out_fd="${1:-1}" # defaults to 1 if no param was set
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local prefix="$2"
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for target in "${ALL_TARGETS[@]}"; do
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echo >&$out_fd "${prefix}${target}"
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done
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}
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# Check if $1 element is in array $2
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contains_element() {
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local e
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for e in "${@:2}"; do [[ "$e" == "$1" ]] && return 0; done
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return 1
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}
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main() {
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if [[ $# -lt 1 ]]; then
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usage
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exit 1
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fi
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if [[ "$1" == "--help" ]]; then
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usage
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exit 1
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fi
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if [[ "$1" == "--list-targets" ]]; then
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list_targets
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exit 0
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fi
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local selected_target="$1"
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if ! contains_element "$selected_target" "${ALL_TARGETS[@]}"; then
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echo "ERROR: Invalid target value '$selected_target'" >&2
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exit 1
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fi
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case "$selected_target" in
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*-cc)
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setenv ART_USE_READ_BARRIER true
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;;
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*)
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setenv ART_USE_READ_BARRIER false
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;;
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esac
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# Make smaller .tar.gz files by excluding debug targets.
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setenv ART_BUILD_TARGET_DEBUG false
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setenv ART_BUILD_HOST_DEBUG false
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setenv USE_DEX2OAT_DEBUG false
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}
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main "$@"
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