| #!/bin/bash |
| # Copyright 2020 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| # IMPORTANT! Before running this script you have to perform these steps: |
| # 1. Run `mkdir ~/scratch` |
| # 2. Run `gn args out/{your_out_dir}` and set the following options: |
| # use_goma = false |
| # # this can be skipped if you do this in build/config/clang/clang.gni |
| # clang_use_chrome_plugins = false |
| # |
| # (You can do these steps only once, as long as you don't delete the directories |
| # between rewrites.) |
| # |
| # For more fine-grained instructions, see: |
| # https://docs.google.com/document/d/1chTvr3fSofQNV_PDPEHRyUgcJCQBgTDOOBriW9gIm9M/edit?ts=5e9549a2#heading=h.fjdnrdg1gcty |
| |
| set -e # makes the script quit on any command failure |
| |
| OUT_DIR="out/rewrite" |
| if [ "$1" != "" ] |
| then |
| OUT_DIR="$1" |
| fi |
| |
| SCRIPT_PATH=$(realpath $0) |
| REWRITER_SRC_DIR=$(dirname $SCRIPT_PATH) |
| |
| COMPILE_DIRS=. |
| EDIT_DIRS=. |
| |
| # Save llvm-build as it is about to be overwritten. |
| mv third_party/llvm-build third_party/llvm-build-upstream |
| |
| # Build and test the rewriter. |
| echo "*** Building the rewriter ***" |
| time tools/clang/scripts/build.py \ |
| --without-android \ |
| --without-fuchsia \ |
| --extra-tools rewrite_raw_ptr_fields |
| tools/clang/rewrite_raw_ptr_fields/tests/run_all_tests.py |
| |
| # Build generated files that a successful compilation depends on. |
| echo "*** Preparing targets ***" |
| gn gen $OUT_DIR |
| GEN_H_TARGETS=`ninja -C $OUT_DIR -t targets all | grep '^gen/.*\(\.h\|inc\|css_tokenizer_codepoints.cc\)' | cut -d : -f 1` |
| time ninja -C $OUT_DIR $GEN_H_TARGETS |
| |
| if grep -qE '^\s*target_os\s*=\s*("win"|win)' $OUT_DIR/args.gn |
| then |
| TARGET_OS_OPTION="--target_os=win" |
| fi |
| |
| # A preliminary rewriter run in a special mode that generates a list of fields |
| # to ignore. These fields would likely lead to compiler errors if rewritten. |
| echo "*** Generating the ignore list ***" |
| time tools/clang/scripts/run_tool.py \ |
| $TARGET_OS_OPTION \ |
| --tool rewrite_raw_ptr_fields \ |
| --tool-arg=--exclude-paths=$REWRITER_SRC_DIR/manual-paths-to-ignore.txt \ |
| --generate-compdb \ |
| -p $OUT_DIR \ |
| $COMPILE_DIRS > ~/scratch/rewriter.out |
| cat ~/scratch/rewriter.out \ |
| | sed '/^==== BEGIN FIELD FILTERS ====$/,/^==== END FIELD FILTERS ====$/{//!b};d' \ |
| | sort | uniq > ~/scratch/automated-fields-to-ignore.txt |
| cat ~/scratch/automated-fields-to-ignore.txt \ |
| tools/clang/rewrite_raw_ptr_fields/manual-fields-to-ignore.txt \ |
| | grep -v "base::FileDescriptorWatcher::Controller::watcher_" \ |
| > ~/scratch/combined-fields-to-ignore.txt |
| |
| # Main rewrite. |
| echo "*** Running the main rewrite phase ***" |
| time tools/clang/scripts/run_tool.py \ |
| $TARGET_OS_OPTION \ |
| --tool rewrite_raw_ptr_fields \ |
| --tool-arg=--exclude-fields=$HOME/scratch/combined-fields-to-ignore.txt \ |
| --tool-arg=--exclude-paths=$REWRITER_SRC_DIR/manual-paths-to-ignore.txt \ |
| -p $OUT_DIR \ |
| $COMPILE_DIRS > ~/scratch/rewriter.main.out |
| |
| # Apply edits generated by the main rewrite. |
| echo "*** Applying edits ***" |
| cat ~/scratch/rewriter.main.out | \ |
| tools/clang/scripts/extract_edits.py | \ |
| tools/clang/scripts/apply_edits.py -p $OUT_DIR $EDIT_DIRS |
| |
| # Format sources, as many lines are likely over 80 chars now. |
| echo "*** Formatting ***" |
| time git cl format |
| |
| # Restore llvm-build. Without this, your future builds will be painfully slow. |
| rm -r -f third_party/llvm-build |
| mv third_party/llvm-build-upstream third_party/llvm-build |