Enhancement for gdb_content_shell, allow set package_name and shared_lib_dir

build/android/gdb_apk

 #!/bin/bash
 #
 # Copyright (c) 2012 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.
 #
-# Attach gdb to a running content shell.  Similar to ndk-gdb.
+# Attach gdb to a running android application.  Similar to ndk-gdb.
 # Run with --annotate=3 if running under emacs (M-x gdb).
 #
-# TODO(jrg): allow package_name and shared_lib_dir to be set on the
-# command line.  Share the guts of this script with other Chromium
-# pieces (like base_unittests_apk) and friends (like WebKit bundles).
+# By default it is used to debug content shell, if it is used to
+# debug other piceces, '-p' and '-l' options are needed.
+# For *unittests_apk (like base_unittests_apk), run with:
+#  "gdb_apk -p org.chromium.native_test -l out/Release/lib.target -r"
 
 adb=$(which adb)
 if [[ "$adb" = "" ]] ; then
   echo "Need adb in your path"
   exit 1
 fi
 
+usage() {
+  echo "usage: ${0##*/} [-p package_name] [-l shared_lib_dir] [-g gdb] [-r]"
+  echo "-p package_name     the android APK package to be debugged"
+  echo "-l shared_lib_dir   directory containes native shared library"
+  echo "-g gdb_args         agruments for gdb, eg: -g '-n -write'"
+  echo "-r                  the target device is rooted"
+}
+
+process_options() {
+  local OPTNAME OPTIND OPTERR OPTARG
+  while getopts ":p:l:g:r" OPTNAME; do
+    case "$OPTNAME" in
+      p)
+        package_name="$OPTARG"
+        ;;
+      l)
+        shared_lib_dir="$OPTARG"
+        ;;
+      g)
+        gdb_args="$OPTARG"
+                ;;
+      r)
+        rooted_phone=1
+        ;;
+      \:)
+        echo "'-$OPTARG' needs an argument."
+        usage
+        exit 1
+        ;;
+      *)
+        echo "invalid command line option: $OPTARG"
+        usage
+        exit 1
+        ;;
+    esac
+  done
+
+  if [ $# -ge ${OPTIND} ]; then
+    eval echo "Unexpected command line argument: \${${OPTIND}}"
+    usage
+    exit 1
+  fi
+}
+
 rooted_phone=0
 
 root=$(dirname $0)/../..
 package_name=org.chromium.content_shell
+shared_lib_dir=$root/out/Release/lib.target
+gdb_args=''
+
+#process options
+process_options "$@"
+echo "Debug package $package_name"
+
 data_dir=/data/data/$package_name
 gdb_server_on_device=$data_dir/lib/gdbserver
-shared_lib_dir=$root/out/Release/lib.target
 
 # Kill any running gdbserver
 pid=$(adb shell ps | awk '/gdbserver/ {print $2}')
 if [[ "$pid" != "" ]] ; then
   if [[ $rooted_phone -eq 1 ]] ; then
     adb shell kill $pid
   else
     adb shell run-as $package_name kill $pid
   fi
 fi
@@ skipping 40 matching lines @@
 
 gdb=$(echo $ANDROID_TOOLCHAIN/*gdb)
 if [[ ! -f ${gdb} ]] ; then
   echo "Wow no gdb in env var ANDROID_TOOLCHAIN which is $ANDROID_TOOLCHAIN"
   exit 4
 else
   echo Using $gdb
 fi
 
 # ${gdb} -x $cmdfile $* $app_process
-${gdb} -x $cmdfile $*
+${gdb} -x $cmdfile $gdb_args
 rm $cmdfile