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1 #!/bin/bash | |
2 | |
3 # Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
4 # Use of this source code is governed by a BSD-style license that can be | |
5 # found in the LICENSE file. | |
6 | |
7 # Usage: make_more_helpers.sh <version> <app_name> | |
8 # | |
9 # This script creates additional helper .app bundles for Chromium, based on | |
10 # the existing helper .app bundle, changing their Mach-O header's flags to | |
11 # enable and disable various features. Based on Chromium Helper.app, it will | |
12 # create Chromium Helper EH.app, which has the MH_NO_HEAP_EXECUTION bit | |
13 # cleared to support Chromium child processes that require an executable heap, | |
14 # and Chromium Helper NP.app, which has the MH_PIE bit cleared to support | |
15 # Chromium child processes that cannot tolerate ASLR. | |
16 # | |
17 # This script expects to be called from the chrome_exe target as a postbuild, | |
18 # and operates directly within the built-up browser app's versioned directory. | |
19 # | |
20 # Each helper is adjusted by giving it the proper bundle name, renaming the | |
21 # executable, adjusting several Info.plist keys, and changing the executable's | |
22 # Mach-O flags. | |
23 | |
24 set -eu | |
25 | |
26 make_helper() { | |
27 local versioned_dir="${1}" | |
28 local app_name="${2}" | |
29 local feature="${3}" | |
30 local flags="${4}" | |
31 | |
32 local helper_name="${app_name} Helper" | |
33 local helper_stem="${versioned_dir}/${helper_name}" | |
34 local original_helper="${helper_stem}.app" | |
35 if [[ ! -d "${original_helper}" ]]; then | |
36 echo "${0}: error: ${original_helper} is a required directory" >& 2 | |
37 exit 1 | |
38 fi | |
39 local original_helper_exe="${original_helper}/Contents/MacOS/${helper_name}" | |
40 if [[ ! -f "${original_helper_exe}" ]]; then | |
41 echo "${0}: error: ${original_helper_exe} is a required file" >& 2 | |
42 exit 1 | |
43 fi | |
44 | |
45 local feature_helper="${helper_stem} ${feature}.app" | |
46 | |
47 rsync -acC --delete --include '*.so' "${original_helper}/" "${feature_helper}" | |
48 | |
49 local helper_feature="${helper_name} ${feature}" | |
50 local helper_feature_exe="${feature_helper}/Contents/MacOS/${helper_feature}" | |
51 mv "${feature_helper}/Contents/MacOS/${helper_name}" "${helper_feature_exe}" | |
52 | |
53 local change_flags="\ | |
54 $(dirname "${0}")/../../../../build/mac/change_mach_o_flags.py" | |
55 "${change_flags}" ${flags} "${helper_feature_exe}" | |
56 | |
57 local feature_info="${feature_helper}/Contents/Info" | |
58 local feature_info_plist="${feature_info}.plist" | |
59 | |
60 defaults write "${feature_info}" "CFBundleDisplayName" "${helper_feature}" | |
61 defaults write "${feature_info}" "CFBundleExecutable" "${helper_feature}" | |
62 | |
63 cfbundleid="$(defaults read "${feature_info}" "CFBundleIdentifier")" | |
64 feature_cfbundleid="${cfbundleid}.${feature}" | |
65 defaults write "${feature_info}" "CFBundleIdentifier" "${feature_cfbundleid}" | |
66 | |
67 cfbundlename="$(defaults read "${feature_info}" "CFBundleName")" | |
68 feature_cfbundlename="${cfbundlename} ${feature}" | |
69 defaults write "${feature_info}" "CFBundleName" "${feature_cfbundlename}" | |
70 | |
71 # As usual, defaults might have put the plist into whatever format excites | |
72 # it, but Info.plists get converted back to the expected XML format. | |
73 plutil -convert xml1 "${feature_info_plist}" | |
74 | |
75 # `defaults` also changes the file permissions, so make the file | |
76 # world-readable again. | |
77 chmod a+r "${feature_info_plist}" | |
78 } | |
79 | |
80 if [[ ${#} -ne 2 ]]; then | |
81 echo "usage: ${0} <version> <app_name>" >& 2 | |
82 exit 1 | |
83 fi | |
84 | |
85 VERSION="${1}" | |
86 APP_NAME="${2}" | |
87 | |
88 CONTENTS_DIR="${BUILT_PRODUCTS_DIR}/${CONTENTS_FOLDER_PATH}" | |
89 VERSIONED_DIR="${CONTENTS_DIR}/Versions" | |
90 CURRENT_VERSIONED_DIR="${VERSIONED_DIR}/${VERSION}" | |
91 | |
92 make_helper "${CURRENT_VERSIONED_DIR}" "${APP_NAME}" "EH" "--executable-heap" | |
93 make_helper "${CURRENT_VERSIONED_DIR}" "${APP_NAME}" "NP" "--no-pie" | |
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