Add script to compile Java Language to odex files
This is a simple script to generate optimized arm64 odex files from Java
Language source files. It is meant for compiling small Java Language
snippets to inspect the quality of the generated assembly. The script
also produces a CFG file to investigate the effect of individual
compiler passes.
Bug: 148973719
Change-Id: Iaefb2e6cfb49b6cbbf04f70dc97dc7dfb934511b
diff --git a/tools/compile-classes.sh b/tools/compile-classes.sh
new file mode 100755
index 0000000..86a4ff7
--- /dev/null
+++ b/tools/compile-classes.sh
@@ -0,0 +1,50 @@
+#!/bin/bash
+#
+# Copyright (C) 2020 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 compiles Java Language source files into arm64 odex files.
+#
+# Before running this script, do lunch and build for an arm64 device.
+#
+# Usage:
+# compile-classes.sh Scratch.java
+
+set -e
+
+SCRATCH=`mktemp -d`
+DEX_FILE=classes.dex
+ODEX_FILE=classes.odex
+
+javac -d $SCRATCH $1
+d8 $SCRATCH/*.class
+
+$ANDROID_BUILD_TOP/art/tools/compile-jar.sh $DEX_FILE $ODEX_FILE arm64 \
+ --generate-debug-info \
+ --dump-cfg=classes.cfg
+
+rm -rf $SCRATCH
+
+echo
+echo "OAT file is at $ODEX_FILE"
+echo
+echo "View it with one of the following commands:"
+echo
+echo " oatdump --oat-file=$ODEX_FILE"
+echo
+echo " aarch64-linux-android-objdump -d $ODEX_FILE"
+echo
+echo "The CFG is dumped to output.cfg for inspection of individual compiler passes."
+echo
