Add script to dump system files used by build
In order to move towards builds which only use resources in the Hafnium
repo, this patch adds a script which runs the build with strace and
dumps all files touched in the process. Files in the Hafnium directory
and in /tmp are automatically filtered out.
Bug: 132428451
Test: ./build/strace_open.sh opened_files.txt
Change-Id: I03a2df4eedf40c456b65920ec8bf98ad08e747c6
diff --git a/build/strace_open.sh b/build/strace_open.sh
new file mode 100755
index 0000000..e960daf
--- /dev/null
+++ b/build/strace_open.sh
@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+# Copyright 2019 The Hafnium Authors.
+#
+# 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
+#
+# https://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.
+#
+
+set -euxo pipefail
+
+SCRIPT_NAME="$(realpath "${BASH_SOURCE[0]}")"
+SCRIPT_DIR="$(realpath "$(dirname "${BASH_SOURCE[0]}")")"
+ROOT_DIR="$(realpath ${SCRIPT_DIR}/..)"
+
+if [ "${HAFNIUM_HERMETIC_BUILD:-}" == "true" ]
+then
+ exec "${ROOT_DIR}/build/run_in_container.sh" -p ${SCRIPT_NAME} $@
+fi
+
+if [ $# != 1 ]
+then
+ echo "Usage: $0 <output_file>" 1>&2
+ exit 1
+fi
+
+MAKE="$(which make)"
+STRACE="$(which strace)"
+
+# Set up a temp directory and register a cleanup function on exit.
+TMP_DIR="$(mktemp -d)"
+function cleanup() {
+ rm -rf "${TMP_DIR}"
+}
+trap cleanup EXIT
+
+STRACE_LOG="${TMP_DIR}/strace.log"
+
+echo "Building with strace"
+pushd ${ROOT_DIR}
+${MAKE} clobber
+${STRACE} \
+ -o "${STRACE_LOG}" \
+ -f \
+ -qq \
+ -e trace=%file,chdir,%process \
+ ${MAKE}
+popd
+
+echo "Processing strace output"
+"${SCRIPT_DIR}/parse_strace_open.py" ${ROOT_DIR} < "${STRACE_LOG}" > "$1"