| #!/bin/bash -eu |
| |
| # Copyright 2018 The ChromiumOS 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 |