1 files changed, 60 insertions, 0 deletions
diff --git a/binary_search_tool/android/generate_cmd.sh b/binary_search_tool/android/generate_cmd.sh
new file mode 100755
index 00000000..78a39b12
--- /dev/null
+++ b/binary_search_tool/android/generate_cmd.sh
@@ -0,0 +1,60 @@
+#!/bin/bash -eu
+
+# Copyright 2018 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This script extracts command line options to build bad item.
+# The generated script will be used by pass level bisection.
+#
+
+source android/common.sh
+
+abs_path=$1
+
+# The item will be `-o relative-path-to-object `, which will be used
+# for seeking command in populate log.
+# We care about the `-o` at the beginning and ` ` at the end are necessary,
+# so that we can get build command for exact this object file.
+# Example: prebuilt/../clang++ -O3 -MF obj1.o.d -o obj.o obj.cpp
+# We should count this command as one to build obj.o, not obj1.o.d.
+real_path=$(realpath --relative-to="${BISECT_WORK_BUILD}" "${abs_path}")
+item="-o $real_path "
+
+populate_log=${BISECT_BAD_BUILD}/_POPULATE_LOG
+
+output='#!/bin/bash -u\n'
+output+='source android/common.sh\n'
+
+result=$(egrep -m 1 -- "${item}" ${populate_log})
+
+# Re-generate bad item to tmp directory location
+tmp_ir='/tmp/bisection_bad_item.o'
+result=$(sed "s|$item|-o $tmp_ir |g" <<< ${result})
+
+# Remove `:` after cd command
+result=$(sed 's|cd:|cd|g' <<< ${result})
+
+# Add environment variable which helps pass level bisection
+result=$(sed 's| -o | $LIMIT_FLAGS -o |g' <<< ${result})
+
+output+=${result}
+
+# Symbolic link generated bad item to original object
+output+="\nln -f $tmp_ir $abs_path"
+output+="\ntouch $abs_path"
+
+echo -e "${output}" > android/cmd_script.sh
+
+chmod u+x android/cmd_script.sh
+
+echo 'Script created as android/cmd_script.sh'
+
+# Check if compiler is LLVM.
+if grep -q "clang" android/cmd_script.sh
+then
+    exit 0
+else
+    echo 'Pass/transformation level bisection only works for LLVM compiler.'
+    exit 1
+fi
+\ No newline at end of file