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1#!/bin/bash
2#
3# Copyright (C) 2018 The Android Open Source Project
4#
5# Licensed under the Apache License, Version 2.0 (the "License");
6# you may not use this file except in compliance with the License.
7# You may obtain a copy of the License at
8#
9#      http://www.apache.org/licenses/LICENSE-2.0
10#
11# Unless required by applicable law or agreed to in writing, software
12# distributed under the License is distributed on an "AS IS" BASIS,
13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14# See the License for the specific language governing permissions and
15# limitations under the License.
16
17# This script undoes (most of) the work done by tools/buildbot-setup-device.sh.
18# Make sure to keep these files in sync.
19
20. "$(dirname $0)/buildbot-utils.sh"
21
22[[ -n "$ART_TEST_ON_VM" ]] && exit 0
23
24# Setup as root, as some actions performed here require it.
25adb root
26adb wait-for-device
27
28if [[ -n "$ART_TEST_CHROOT" ]]; then
29  # Check that ART_TEST_CHROOT is correctly defined.
30  [[ "x$ART_TEST_CHROOT" = x/* ]] || { echo "$ART_TEST_CHROOT is not an absolute path"; exit 1; }
31
32  if adb shell test -d "$ART_TEST_CHROOT"; then
33    # Display users of the chroot dir.
34
35    msginfo "List open files under chroot dir $ART_TEST_CHROOT"
36    adb shell lsof | grep "$ART_TEST_CHROOT"
37
38    # for_all_chroot_process ACTION
39    # -----------------------------
40    # Execute ACTION on all processes running from binaries located
41    # under the chroot directory. ACTION is passed two arguments: the
42    # PID of the process, and a string containing the command line
43    # that started this process.
44    for_all_chroot_process() {
45      local action=$1
46      adb shell ls -ld "/proc/*/root" \
47        | sed -n -e "s,^.* \\(/proc/.*/root\\) -> $ART_TEST_CHROOT\$,\\1,p" \
48        | while read link; do
49            local dir=$(dirname "$link")
50            local pid=$(basename "$dir")
51            local cmdline=$(adb shell cat "$dir"/cmdline | tr '\000' ' ')
52            $action "$pid" "$cmdline"
53          done
54    }
55
56    # display_process PID CMDLINE
57    # ---------------------------
58    # Display information about process with given PID, that was started with CMDLINE.
59    display_process() {
60      local pid=$1
61      local cmdline=$2
62      echo "$cmdline (PID: $pid)"
63    }
64
65    msginfo "List processes running from binaries under chroot dir $ART_TEST_CHROOT"
66    for_all_chroot_process display_process
67
68    # Tear down the chroot dir.
69
70    msginfo "Tear down the chroot set up in $ART_TEST_CHROOT"
71
72    # remove_filesystem_from_chroot DIR-IN-CHROOT FSTYPE REMOVE-DIR-IN-CHROOT
73    # -----------------------------------------------------------------------
74    # Unmount filesystem with type FSTYPE mounted in directory DIR-IN-CHROOT
75    # under the chroot directory.
76    # Remove DIR-IN-CHROOT under the chroot if REMOVE-DIR-IN-CHROOT is
77    # true.
78    remove_filesystem_from_chroot() {
79      local dir_in_chroot=$1
80      local fstype=$2
81      local remove_dir=$3
82      local dir="$ART_TEST_CHROOT/$dir_in_chroot"
83      adb shell test -d "$dir" \
84        && adb shell mount | grep -q " on $dir type $fstype " \
85        && if adb shell umount "$dir"; then
86             $remove_dir && adb shell rmdir "$dir"
87           else
88             echo "Files still open in $dir:"
89             adb shell lsof | grep "$dir"
90           fi
91    }
92
93    # Remove /bin symlink from chroot.
94    adb shell rm -f "$ART_TEST_CHROOT/bin"
95
96    # Remove /apex from chroot.
97    adb shell rm -rf "$ART_TEST_CHROOT/apex"
98
99    # Remove /dev from chroot.
100    remove_filesystem_from_chroot dev/cpuset cgroup false
101    remove_filesystem_from_chroot dev/pts devpts false
102    remove_filesystem_from_chroot dev tmpfs true
103
104    # Remove /sys/kernel/debug from chroot.
105    # The /sys/kernel/debug directory under the chroot dir cannot be
106    # deleted, as it is part of the host device's /sys filesystem.
107    remove_filesystem_from_chroot sys/kernel/debug debugfs false
108    # Remove /sys from chroot.
109    remove_filesystem_from_chroot sys sysfs true
110
111    # Remove /proc from chroot.
112    remove_filesystem_from_chroot proc proc true
113
114    # Remove /etc from chroot.
115    adb shell rm -f "$ART_TEST_CHROOT/etc"
116    adb shell rm -rf "$ART_TEST_CHROOT/system/etc"
117
118    # Remove directories used for ART testing in chroot.
119    adb shell rm -rf "$ART_TEST_CHROOT/data/local/tmp"
120    adb shell rm -rf "$ART_TEST_CHROOT/data/dalvik-cache"
121    adb shell rm -rf "$ART_TEST_CHROOT/tmp"
122
123    # Remove property_contexts file(s) from chroot.
124    property_context_files="/property_contexts \
125      /system/etc/selinux/plat_property_contexts \
126      /vendor/etc/selinux/nonplat_property_context \
127      /plat_property_contexts \
128      /nonplat_property_contexts"
129    for f in $property_context_files; do
130      adb shell rm -f "$ART_TEST_CHROOT$f"
131    done
132
133
134    # Kill processes still running in the chroot.
135
136    # kill_process PID CMDLINE
137    # ------------------------
138    # Kill process with given PID, that was started with CMDLINE.
139    kill_process() {
140      local pid=$1
141      local cmdline=$2
142      echo "Killing $cmdline (PID: $pid)"
143      adb shell kill -9 "$pid"
144    }
145
146    msginfo "Kill processes" \
147      "still running from binaries under chroot dir $ART_TEST_CHROOT (if any)"
148    for_all_chroot_process kill_process
149  fi
150fi
151