Switch to the "new" way of ASan deployment on Android devices.

tools/android/asan/asan_device_setup.sh

Index: tools/android/asan/asan_device_setup.sh
diff --git a/tools/android/asan/asan_device_setup.sh b/tools/android/asan/asan_device_setup.sh
new file mode 100755
index 0000000000000000000000000000000000000000..3b8c4462c8956b3aad1152aa8ff29bad0d0fe174
--- /dev/null
+++ b/tools/android/asan/asan_device_setup.sh
@@ -0,0 +1,162 @@
+#!/bin/bash -e
+# Copyright (c) 2014 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.
+
+# Prepare Android device to run ASan application.

[bulach, 2014/01/24 05:51:22]

nit: since this is going to be a standalone tool, may want to add a note say
that it's asynchronous, and the caller should somehow wait for the device to
fully come back up (i.e., WaitForDevicePM)

[eugenis, 2014/01/24 07:52:01]

Done.

+
+
+HERE="$(cd "$(dirname "$0")" && pwd)"
+
+revert=no
+extra_options=
+device=
+
+function usage {
+    echo "usage: $0 [--revert] [--device device-id]"
+    echo "  --revert: Uninstall ASan from the device."
+    echo "  --extra_options: Extra ASAN_OPTIONS."
+    echo "  --device: Install to the given device. Use 'adb devices' to find"
+    echo "            device-id."
+    echo
+    exit 1
+}
+
+while [[ $# > 0 ]]; do
+  case $1 in
+    --revert)
+      revert=yes
+      ;;
+    --extra-options)
+      shift
+      if [[ $# == 0 ]]; then
+        echo "--extra-options requires an argument."
+        exit 1
+      fi
+      extra_options="$1"
+      ;;
+    --device)
+      shift
+      if [[ $# == 0 ]]; then
+        echo "--device requires an argument."
+        exit 1
+      fi
+      device="$1"
+      ;;
+    *)
+      usage
+      ;;
+  esac
+  shift
+done
+
+ADB="adb"
+if [[ x$device != x ]]; then
+    ADB="adb -s $device"
+fi
+
+ASAN_RT_PATH="$HERE"
+ASAN_RT="libclang_rt.asan-arm-android.so"
+
+if [[ x$revert == xyes ]]; then
+    echo '>> Uninstalling ASan'
+    $ADB remount
+    $ADB shell mv /system/bin/app_process.real /system/bin/app_process
+    $ADB shell rm /system/bin/asanwrapper
+    $ADB shell rm /system/lib/$ASAN_RT
+
+    echo '>> Restarting shell'
+    $ADB shell stop
+    $ADB shell start
+
+    echo '>> Done'
+    exit 0
+fi
+
+if ! [[ -f "$ASAN_RT_PATH/$ASAN_RT" ]]; then
+    echo "ASan runtime library not found at $ASAN_RT"
+    exit 1
+fi
+
+TMPDIRBASE=$(mktemp -d)
+echo $TMPDIRBASE
+TMPDIROLD="$TMPDIRBASE/old"
+TMPDIR="$TMPDIRBASE/new"
+mkdir "$TMPDIROLD"
+
+echo '>> Remounting /system rw'
+$ADB remount
+
+echo '>> Copying files from the device'
+$ADB pull /system/bin/app_process "$TMPDIROLD"
+$ADB pull /system/bin/app_process.real "$TMPDIROLD" || true
+$ADB pull /system/bin/asanwrapper "$TMPDIROLD" || true
+$ADB pull /system/lib/libclang_rt.asan-arm-android.so "$TMPDIROLD" || true
+cp -r "$TMPDIROLD" "$TMPDIR"
+
+if ! [[ -f "$TMPDIR/app_process" ]]; then
+    echo "app_process missing???"
+    exit 1
+fi
+
+if [[ -f "$TMPDIR/app_process.real" ]]; then
+    echo "app_process.real exists, updating the wrapper"
+else
+    echo "app_process.real missing, new installation"
+    mv "$TMPDIR/app_process" "$TMPDIR/app_process.real"
+fi
+
+echo '>> Generating wrappers'
+
+cp "$ASAN_RT_PATH/$ASAN_RT" "$TMPDIR/"
+
+# FIXME: alloc_dealloc_mismatch=0 prevents a failure in libdvm startup,
+# which may or may not be a real bug (probably not).
+ASAN_OPTIONS=start_deactivated=1,alloc_dealloc_mismatch=0
+if [[ x$extra_options != x ]] ; then
+    ASAN_OPTIONS="$ASAN_OPTIONS,$extra_options"
+fi
+
+# Zygote wrapper.
+cat <<EOF >"$TMPDIR/app_process"
+#!/system/bin/sh
+ASAN_OPTIONS=$ASAN_OPTIONS \\
+LD_PRELOAD=libclang_rt.asan-arm-android.so \\
+exec /system/bin/app_process.real \$@
+
+EOF
+
+# General command-line tool wrapper (use for anything that's not started as
+# zygote).
+cat <<EOF >"$TMPDIR/asanwrapper"
+#!/system/bin/sh
+LD_PRELOAD=libclang_rt.asan-arm-android.so \\
+exec \$@
+
+EOF
+
+if ! ( cd "$TMPDIRBASE" && diff -qr old/ new/ ) ; then
+    echo '>> Pushing files to the device'
+    $ADB push "$TMPDIR/$ASAN_RT" /system/lib/
+    $ADB push "$TMPDIR/app_process" /system/bin/app_process
+    $ADB push "$TMPDIR/app_process.real" /system/bin/app_process.real
+    $ADB push "$TMPDIR/asanwrapper" /system/bin/asanwrapper
+    $ADB shell chown root.shell \
+        /system/bin/app_process \
+        /system/bin/app_process.real \
+        /system/bin/asanwrapper
+    $ADB shell chmod 755 \
+        /system/bin/app_process \
+        /system/bin/app_process.real \
+        /system/bin/asanwrapper
+
+    echo '>> Restarting shell'
+    $ADB shell stop
+    $ADB shell start
+else
+    echo '>> Device is up to date'
+fi
+
+rm -r "$TMPDIRBASE"
+
+echo '>> Done'